What burns unstably on the neutron star of 4U 0614+091? (2009)
Kuulkers, E., Levine, A. M., Brandt, S., Smith, D. A., ...
The LMXB 4U 0614+091 is a source of sporadic thermonuclear (type I) X-ray bursts. In serendipitous wide-field X-ray observations by EURECA/WATCH, RXTE/ASM, BeppoSAX/WFC, HETE-2/FREGATE,...
Swift observations of the X-ray and UV evolution of V2491 Cyg (Nova Cyg 2008 No. 2) (2009)
Page, K. L., Osborne, J. P., Evans, P. A., Wynn, G. A., Beardmore, A. P., Starling, R. L. C., ...
We present extensive, high-density Swift observations of V2491 Cyg (Nova Cyg 2008 No. 2). Observing the X-ray emission from only one day after the nova discovery, the source is followed through the...
Read, A. M., Saxton, R. D., Jonker, P. G., Kuulkers, E., Esquej, P., Pojmanski, G., ...
In order to discover new X-ray transients, the data taken by XMM-Newton as it slews between targets are being processed and cross-correlated with other X-ray observations. A bright source, XMMSL1...
Bel, M. Cadolle, Prat, L., Rodriguez, J., Ribo, M., Barragan, L., D'Avanzo, P., ...
XTE J1818-245 is an X-ray nova that experienced an outburst in 2005, first seen by the RXTE satellite. The source was observed simultaneously at various wavelengths up to soft gamma-rays with the...
Pre-nova X-ray observations of V2491 Cyg (Nova Cyg 2008b) (2009)
Ibarra, A., Kuulkers, E., Osborne, J. P., Page, K., Ness, J. U., Saxton, R. D., ...
Classical novae are phenomena caused by explosive hydrogen burning on an accreting white dwarf. So far, only one classical nova has been identified in X-rays before the actual optical outburst...
The early phase of a H1743-322 outburst observed by INTEGRAL, RXTE, Swift, and XMM/Newton (2009)
Prat, L., Rodriguez, J., Bel, M. Cadolle, Kuulkers, E., Hanke, M., Tomsick, J., ...
We investigate the early phase of the first state change during the 2008 September-November outburst of H1743-322, first detected by the INTEGRAL satellite. We analyse INTEGRAL, RXTE, Swift, and...
INTEGRAL monitoring of unusually long X-ray bursts (2008)
Chenevez, J., Falanga, M., Kuulkers, E., Brandt, S., Lund, N., Cumming, A.
X-ray bursts are thermonuclear explosions on the surface of accreting neutron stars in low mass X-ray binaries. As most of the known X-ray bursters are frequently observed by INTEGRAL, an...
The accretion powered spin-up of GRO J1750-27 (2008)
Shaw, S. E., Hill, A. B., Kuulkers, E., Brandt, S., Chenevez, J., Kretschmar, P.
The timing properties of the 4.45 s pulsar in the Be X-ray binary system GRO J1750-27 are examined using hard X-ray data from INTEGRAL and Swift during a Type II outburst observed during 2008. The...
Caballero-Garcia, M. D., Miller, J. M., Trigo, M. Diaz, Kuulkers, E., Fabian, A. C., Mas-Hesse, J. M., ...
We present simultaneous XMM-Newton and INTEGRAL observations of the luminous black hole transient and relativistic jet source GX 339-4. GX 339-4 started an outburst on November of 2006 and our...
High Energy Sources Observed with OMC (2008)
Risquez, D., Domingo, A., Mas-Hesse, J. M., Kuulkers, E.
The INTEGRAL Optical Monitoring Camera, OMC, has detected many high energy sources. We have obtained V-band fluxes and light curves for their counterparts. In the cases of previously unknown...
Restless quiescence: thermonuclear flashes between transient X-ray outbursts (2008)
For thermonuclear flashes to occur on neutron star surfaces, fuel must have been accreted from a donor star. However, sometimes flashes are seen from transient binary systems when they are thought to...
XMM-Newton slew survey discovery of the nova XMMSL1 J070542.7-381442 (V598 Pup) (2008)
Read, A. M., Saxton, R. D., Torres, M. A. P., Esquej, P., Kuulkers, E., Jonker, P. G., ...
In an attempt to catch new X-ray transients while they are still bright, the data taken by XMM-Newton as it slews between targets is being processed and cross-correlated with other X-ray observations...
XMM-Newton slew survey discovery of the nova XMMSL1 J070542.7-381442 (V598 Puppis) (2008)
Read, A. M., Saxton, R. D., Torres, M. A. P., Esquej, P., Kuulkers, E., Jonker, P. G., ...
First superburst from a classical low-mass X-ray binary transient (2008)
Keek, L., Kuulkers, E., Cumming, A., Brown, E.F., Suzuki, M.
We report the analysis of the first superburst from a transiently accreting neutron star system with the All-Sky Monitor (ASM) on the Rossi X-ray Timing Explorer. The superburst occurred 55 days...
Earlier activity from XTE J1739-302/IGR J17391-3021 detected by INTEGRAL (2008)
Chenevez, J., Beckmann, V., Kuulkers, E., Bird, A., Brandt, S., Courvoisier, T.J.L., ...
The recently reported outburst from the supergiant fast X-ray transient XTE J1739-302/IGR J17391-3021 (ATEL #1466) began already about five hours earlier than the Swift/BAT trigger on 2008-04-08. The...
Bassa, C., Jonker, P.G., Nelemans, G., Steeghs, D., Torres, M.A.P., Kuiper, L., ...
We report on multi-epoch Chandra and optical observations of the faint, bursting (Chelovekov & Grebenev 2007, Atel #1094) neutron star transient AX J1754.2-2754. The source has been detected every...
Further observations of GRO J1750-27 (AX J1749.1-2639) with INTEGRAL (2008)
Brandt, S., Shaw, S., Hill, A., Kretschmar, P., Wijnands, R., Oosterbroek, T., ...
The transient accreting X-ray pulsar GRO J1750-27 (AX J1749.1-2639), which became active end of January 2008 (ATel #1376), has been repeatedly observed by the INTEGRAL Galactic Bulge monitoring...
Altamirano, D., Galloway, D., Chenevez, J., Zand, J. In 't, Kuulkers, E., Degenaar, N., ...
We report on RXTE monitoring observations of the transient X-ray binary IGR J17473-2721 since the beginning of its latest outburst on March 26th, 2008 (see ATEL #1445, #1459, #1460, #1461 and #1468)....
Recent activity of the Rapid Burster (MXB 1730-335) (2008)
Kuulkers, E., Brandt, S., Markwardt, C., Remillard, R.A., Shaw, S., Beckmann, V., ...
Observations taken as part of the INTEGRAL Galactic bulge monitoring program (see ATel #1385) on 2008, February 23 13:32-17:13 (UT) showed bursting activity from the X-ray transient, the Rapid...
Hard X-ray activity of IGR J17473-2721 (2008)
Kuulkers, E., Shaw, S., Beckmann, V., Brandt, S., Chenevez, J., Courvoisier, T.J.L., ...
Persistent X-ray activity has been reported by Swift/XRT (ATel #1459) and RXTE/PCA (ATel #1460) from the transient IGR J17473-2721 (= XTE J1747-274; ATels #467, #498) after the detection of an X-ray...
INTEGRAL spots renewed activity from H1743-322 (2008)
Kuulkers, E., Brandt, S., Budtz-Jorgensen, C., Chenevez, J., Shaw, S., Beckmann, V., ...
INTEGRAL Galactic Bulge monitoring (see ATels #438, #874, #1005, #1385) observations on UT 2008 Sep 23 08:51-12:34 reveal a new outburst of the Galactic black-hole candidate and X-ray transient...
Kuulkers, E., Beckmann, V., Shaw, S., Brandt, S., Chenevez, J., Courvoisier, T.J.L., ...
A new season of the INTEGRAL Galactic Bulge monitoring program (see ATels #438, #874, #1005; Kuulkers et al. 2007, A&A 466, 595) started, with observations on UT 11 Feb 2008, 16:33-18:07. We here...
Continuous brightening of IGR J17473-2721 (2008)
Baldovin Saavedra, C., Chenevez, J., Kuulkers, E., Beckmann, V., Bird, A., Brandt, S., ...
Renewed accretion activity has been reported by Swift/XRT (ATel #1459), XTE/PCA (ATel #1460) and INTEGRAL/IBIS/ISGRI (ATel #1461) from the RXTE transient IGR J17473-2721 (= XTE J1747-274; ATels #467,...
First superburst from a classical low-mass X-ray binary transient (2007)
Keek, L., Kuulkers, E., Cumming, A., Brown, E. F., Suzuki, M.
We report the analysis of the first superburst from a transiently accreting neutron star system with the All-Sky Monitor (ASM) on the Rossi X-ray Timing Explorer. The superburst occurred 55 days...
Archival observations of the ultra-soft X-ray transient 4U 1630-47 (2007)
Parmar Williams Kuulkers, A. N. Parmar, O. R. Williams, E. Kuulkers, L. Angelini, N. E. White
. We report on archival observations of the ultra-soft X-ray transient 4U1630\Gamma47. In 1979 February, 1989 March, and 1994 September, 4U1630\Gamma47 was observed in outburst by the Einstein High...
B. A. Vaughan, M. Van, Der Klis, M. Méndez, J. Van Paradijs, ...
Using the Rossi X-Ray Timing Explorer, we have measured127 �s time delays in 830 Hz quasi-periodic oscillations (QPOs) between 4–6 and 11–17 keV in 4U 1608�52, with high-energy photons...
The high energy emission from black holes (2007)
Caballero-Garcia, M. D., Miller, J. M., Kuulkers, E.
The origin of the high energy emission (X-rays and gamma-rays) from black holes is still a matter of debate. We present new evidence that hard X-ray emission in the low/hard state may not be...
Intermediate long X-ray bursts from the ultra-compact binary source SLX 1737-282 (2007)
Falanga, M., Chenevez, J., Cumming, A., Kuulkers, E., Trap, G., Goldwurm, A.
Aims: The low persistent X-ray burster source SLX 1737-282 is classified as an ultra-compact binary candidate. We compare the data on SLX 1737-282 with the other similar objects and attempt to derive...
Caballero García, María Dolores, Miller, J. M., Kuulkers, E., Trigo, M. D., Homan, J., Lewin, W. H. G., ...
12 pages, 10 figures, 3 tables.-- ISI Article Identifier: 000250480600041.-- ArXiv pre-print available at: http://arxiv.org/abs/0706.1302
The Burst Spectra of EXO 0748-676 during a Long 2003 XMM-Newton Observation (2007)
Cottam, J., Paerels, F., Méndez, M., Boirin, L., Lewin, W. H. G., Kuulkers, E., ...
Gravitationally redshifted absorption lines from highly ionized iron have been previously identified in the burst spectra of the neutron star in EXO 0748-676. To repeat this detection we obtained a...
Churazov, E., Sunyaev, R., Revnivtsev, M., Sazonov, S., Molkov, S., Grebenev, S., ...
We study the spectrum of the cosmic X-ray background (CXB) in energy range $\sim$5-100 keV. Early in 2006 the INTEGRAL observatory performed a series of four 30ksec observations with the Earth disk...
Churazov, E., Sunyaev, R., Revnivtsev, M., Sazonov, S., Molkov, S., Grebenev, S., ...
We study the spectrum of the cosmic X-ray background (CXB) in energy range $\sim$5-100 keV. Early in 2006 the INTEGRAL observatory performed a series of four 30ksec observations with the Earth disk...
Churazov, E., Sunyaev, R., Revnivtsev, M., Sazonov, S., Molkov, S., Grebenev, S., ...
We study the spectrum of the cosmic X-ray background (CXB) in energy range $\sim$5-100 keV. Early in 2006 the INTEGRAL observatory performed a series of four 30ksec observations with the Earth disk...
Caballero-Garcia, M. D., Miller, J. M., Kuulkers, E., Trigo, M. Diaz, Homan, J., Lewin, W. H. G., ...
We present broadband (3-500 keV) INTEGRAL X-ray spectra and X-ray/optical light curves of the luminous black hole X-ray transient and relativistic jet source GRO J1655-40. Our analysis covers four...
IGR J17254-3257, a new bursting neutron star (2007)
Chenevez, J., Falanga, M., Kuulkers, E., Walter, R., Bildsten, L., Brandt, S., ...
The study of the observational properties of uncommonly long bursts from low luminosity sources with extended decay times up to several tens of minutes is important when investigating the transition...
IGR J17254-3257, a new bursting neutron star (2007)
Chenevez, J., Falanga, M., Kuulkers, E., Walter, R., Bildsten, L., Brandt, S., ...
The study of the observational properties of uncommonly long bursts from low luminosity sources with extended decay times up to several tens of minutes is important when investigating the transition...
Two-phase X-ray burst from GX 3+1 observed by INTEGRAL (2007)
Chenevez, J., Falanga, M., Brandt, S., Farinelli, R., Frontera, F., Goldwurm, A., ...
We present an analysis of an anomalously long X-ray burst from the low-mass X-ray binary system GX~3+1 observed by INTEGRAL on August 31, 2004. The burst is characterized by two distinct phases: an...
A description of sources detected by INTEGRAL during the first 4 years of observations (2007)
Bodaghee, A., Courvoisier, T. J. -L., Rodriguez, J., Beckmann, V., Produit, N., Hannikainen, D., ...
Parameters from the literature, such as positions, photoelectric absorption (nH), spin and orbital periods, and distances or redshifts, were collected for all ~500 sources detected by INTEGRAL-ISGRI...
Paizis, A., Farinelli, R., Titarchuk, L., Courvoisier, T. J. -L., Bazzano, A., Beckmann, V., ...
We studied and compared the long-term average hard X-ray (>20keV) spectra of a sample of twelve bright low-mass X-ray binaries hosting a neutron star (NS). Our sample comprises the six well studied...
The INTEGRAL Galactic bulge monitoring program: the first 1.5 years (2007)
Kuulkers, E., Shaw, S. E., Paizis, A., Chenevez, J., Brandt, S., Courvoisier, T. J. -L., ...
The Galactic bulge region is a rich host of variable high-energy point sources. Since 2005, February 17 we are monitoring the source activity in this region about every three days with INTEGRAL....
IGR j17497-2821: a new X-ray nova (2007)
Lubinski, P, Paltani, S, Produit, N, Zurita, J, Kuulkers, E, ...
Context. A new hard X-ray transient has been discovered by INTEGRAL on 2006 Sep. 17 at 1 degree from the Galactic Centre.
Churazov, E., Sunyaev, R., Revnivtsev, M., Sazonov, S., Molkov, S., Grebenev, S., ...
12 pages, 12 figures.-- arXiv:0608250 astro-ph pre-print supplied.-- Final full-text version of the paper available at: http://dx.doi.org/10.1051/0004-6361:20066230.
Kaaret, P., Prieskorn, Z., Brandt, S., Lund, N., Mereghetti, S., ...
We report on millisecond variability from the X-ray transient XTE J1739-285. We detected six X-ray type I bursts and found evidence for oscillations at 1122 +/- 0.3 Hz in the brightest X-ray burst....
The XMM-Newton/INTEGRAL monitoring campaign of IGR J16318-4848 (2006)
Ibarra, A., Matt, G., Guainazzi, M., Kuulkers, E., Jimenez-Bailon, E., Rodriguez, J., ...
IGR J16318-4848 is the prototype and one of the more extreme examples of the new class of highly obscured Galactic X-ray sources discovered by INTEGRAL. A monitoring campaign on this source has been...
XMM-Newton and INTEGRAL spectroscopy of the microquasar GRO J1655-40 during its 2005 outburst (2006)
Trigo, M. Diaz, Parmar, A. N., Miller, J., Kuulkers, E., Caballero-Garcia, M. D.
We report on two simultaneous XMM-Newton and INTEGRAL observations of the microquasar GRO J1655-40 during the 2005 outburst when the source was in its high-soft state. The 0.3-200 keV spectra are...
ToO observations of GRO J1655-40 in outburst with INTEGRAL (2006)
Caballero-García, M. D., Kuulkers, E., Kretschmar, P., Domingo, A., Miller, J. M., Mas-Hesse, J. M.
In this paper we present the results of the analysis of the INTEGRAL data for the black hole transient GRO J1655-40. The observations consist of four ToO (100 ks each) observations's AO-3 spread from...
Churazov, E., Sunyaev, R., Revnivtsev, M., Sazonov, S., Molkov, S., Grebenev, S., ...
We study the spectrum of the cosmic X-ray background (CXB) in energy range $\sim$5-100 keV. Early in 2006 the INTEGRAL observatory performed a series of four 30ksec observations with the Earth disk...
Paizis, A., Farinelli, R., Titarchuk, L., Courvoisier, T. J. -L., Bazzano, A., Beckmann, V., ...
We studied and compared the long-term average hard X-ray (>20keV) spectra of a sample of twelve bright low-mass X-ray binaries hosting a neutron star (NS). Our sample comprises the six well studied...
X-rays from cataclysmic variables (2006)
Kuulkers, E., Norton, A., Schwope, A.J., Warner, B.
Cataclysmic Variables are a distinct class of interacting binaries, transferring mass from a donor star to a degenerate accretor, a white dwarf. We here review X-ray observations of these systems,...
The INTEGRAL Galactic Bulge monitoring program (2006)
Kuulkers, E., Shaw, S., Brandt, S., Chenevez, J., Courvoisier, T. J. -L., Ebisawa, K., ...
The Galactic Bulge region is a rich host of variable high-energy point sources. These sources include bright and relatively faint X-ray transients, X-ray bursters, persistent neutron star and...
Simultaneous X-ray/optical observations of GX 9+9 (4U 1728-16) (2006)
Kong, A. K. H., Charles, P. A., Homer, L., Kuulkers, E., O'Donoghue, D.
We report on the results of the first simultaneous X-ray (RXTE) and optical (SAAO) observations of the luminous low mass X-ray binary (LMXB) GX 9+9 in 1999 August. The high-speed optical photometry...
INTEGRAL and XMM-Newton observations of the X-ray pulsar IGR J16320-4751/AX J1631.9-4752 (2006)
Rodriguez, J., Bodaghee, A., Kaaret, P., Tomsick, J.A., Kuulkers, E., Malaguti, G., ...
We report on observations of the X-ray pulsar IGR J16320-4751 (a.k.a. AX J1631.9-4752) performed simultaneously with INTEGRAL and XMM-Newton. We refine the source position and identify the most...
INTEGRAL and XMM-Newton observations of the X-ray pulsar IGR J16320-4751/AX J1631.9-4752 (2006)
Rodriguez, J., Bodaghee, A., Kaaret, P., Tomsick, J.A., Kuulkers, E., Malaguti, G., ...
We report on observations of the X-ray pulsar IGR J16320-4751 (a.k.a. AX J1631.9-4752) performed simultaneously with INTEGRAL and XMM-Newton. We refine the source position and identify the most...
INTEGRAL and XMM-Newton observations of the X-ray pulsar IGR J16320-4751/AX J1631.9-4752 (2006)
Rodriguez, J., Bodaghee, A., Kaaret, P., Tomsick, J.A., Kuulkers, E., Malaguti, G., ...
We report on observations of the X-ray pulsar IGR J16320-4751 (a.k.a. AX J1631.9-4752) performed simultaneously with INTEGRAL and XMM-Newton. We refine the source position and identify the most...
Wijnands, R.A.D., Kuulkers, E., Muno, M.P., Cackett, E.M., Maccarone, T.J., ...
On 8-9 September 2006, a series of 7 XMM-Newton observations were performed as part of our XMM-Newton/Chandra monitoring campaign of the 1.7 square degree region around Sgr A* (Wijnands et al. 2006,...
INTEGRAL discovery of two faint hard X-ray sources in the Galactic Bulge (2006)
Turler, M., Shaw, S.E., Kuulkers, E., Brandt, S., Courvoisier, T.J.L., Garau, A.D., ...
Analysis of INTEGRAL Galactic Bulge monitoring observations (ATel #438) taken between 16:51 and 20:33 UTC on 3 April 2006, reveals the presence of two new sources of hard X-rays. They both have a...
INTEGRAL detects hard X-ray emission from XTE J1817-330 (2006)
Shaw, S.E., Zurita, J., Kuulkers, E., Brandt, S., Chenevez, J., Courvoisier, T.J.L., ...
During the start of the third period of the INTEGRAL Galactic Bulge monitoring observations (Kuulkers et al 2005, ATel #438), the X-ray transient and black-hole candidate XTE J1817-330 (ATel #714)...
Further INTEGRAL observations of IGR J17497-2821 (2006)
Shaw, S.E., Soldi, S., Mowlavi, N., Kuulkers, E., Brandt, S., Chenevez, J., ...
The new INTEGRAL source IGR J17497-2821 (ATel #885) has been clearly detected by IBIS/ISGRI (S/N=33, 20-60 keV) in the INTEGRAL Galactic bulge monitoring program (ATels #438, #874) on 2006, Sep 18,...
The INTEGRAL Galactic Bulge monitoring program (2006)
Kuulkers, E., Shaw, S.E., Brandt, S., Chenevez, J., Courvoisier, T.J.L., Ebisawa, K., ...
The Galactic Bulge region is a rich host of variable high-energy point sources. These sources include bright and relatively faint X-ray transients, X-ray bursters, persistent neutron star and...
Kuulkers, E., Shaw, S.E., Paizis, A., Gros, A., Chenevez, J., Sanchez-Fernandez, C., ...
We performed a re-analysis of all consolidated data of the INTEGRAL AO-3 Galactic Bulge monitoring program (ATel #438; Kuulkers et al. 2006, astro-ph/0603130), and detected a new source with...
INTEGRAL and RXTE monitoring of XTE J1817-330: evolving through a state change? (2006)
Kuulkers, E., Goldoni, P., Shaw, S.E., Brandt, S., Chenevez, J., Courvoisier, T.J.L., ...
INTEGRAL Galactic Bulge monitoring observations (ATel #438) indicate that the X-ray transient and black-hole candidate XTE J1817-330 (ATel #714) has increased in hard X-rays (20-60 keV) compared to...
Broadband INTEGRAL analysis of IGR J17497-2821 (2006)
Kuulkers, E., Chenevez, J., Shaw, S.E., Brandt, D., Courvoisier, T.J.L., Garau, A.D., ...
We further analysed the INTEGRAL JEM-X observations performed on UT 2006, Sep 18, 08:30-12:12 (ATel #886) of the new hard INTEGRAL source IGR J17497-2821 (ATel #885). We find average fluxes of 31 +/-...
Three active neutron star X-ray transients: SAX J1747.0-2853, XTE J1739-285 and GRS 1747-312 (2006)
Chenevez, J., Shaw, S.E., Kuulkers, E., Brandt, S., Courvoisier, T.J.L., Ebisawa, K., ...
Apart from the active black-hole candidate X-ray transient XTE J1817-330 (ATel #714), three known neutron star X-ray transients have been found to be active in the INTEGRAL Galactic Bulge monitoring...
INTEGRAL detects SWIFT J174535.5-290135.6 (2006)
Chenevez, J., Sanchez-Fernandez, C., Kuulkers, E., Shaw, S.E., Brandt, S., Courvoisier, T.J.L., ...
We report on a detection of the new source SWIFT J174535.5-290135.6 (ATel #753) by the JEM-X monitor during INTEGRAL Galactic Bulge monitoring observations taken between 2006, 17 Feb 21:11 and 18 Feb...
INTEGRAL and XMM-Newton observations of the X-ray pulsar IGR J16320-4751/AX J1631.9-4752 (2005)
Rodriguez, J., Bodaghee, A., Kaaret, P., Tomsick, J. A., Kuulkers, E., Malaguti, G., ...
We report on observations of the X-ray pulsar IGR J16320-4751 (a.k.a. AX J1631.9-4752) performed simultaneously with INTEGRAL and XMM-Newton. We refine the source position and identify the most...
Bel, M. Cadolle, Rodriguez, J., Sizun, P., Farinelli, R., Del Santo, M., Goldwurm, A., ...
We report the results of extensive high-energy observations of the X-ray transient and black hole candidate XTE J1720-318 performed with INTEGRAL, XMM-Newton and RXTE. The source, which underwent an...
Detection of hard X-ray emission from the Galactic nuclear region with INTEGRAL (2005)
Belanger, G., Goldwurm, A., Goldoni, P., Paul, J., Terrier, R., Falanga, M., ...
This letter presents the first results of an observational campaign to study the Galactic Centre with INTEGRAL. The mosaicked images obtained with the IBIS/ISGRI coded aperture instrument in the...
Wijnands, R., Rupen, M., Maccarone, T., Homan, J., Cornelisse, R., ...
We present the first results of our X-ray monitoring campaign on a 1.7 square degree region centered on Sgr A* using the satellites XMM-Newton and Chandra. The purpose of this campaign is to monitor...
Resolving the Hard X-ray Emission of GX 5-1 with INTEGRAL (2005)
Paizis, A., Ebisawa, K., Tikkanen, T., Rodriguez, J., Chenevez, J., Kuulkers, E., ...
We present the study of one year of INTEGRAL data on the neutron star low mass X-ray binary GX 5-1. Thanks to the excellent angular resolution and sensitivity of INTEGRAL, we are able to obtain a...
The GRB of 1999 January 23: prompt emission and broad-band afterglow modeling (2005)
Corsi, A., Piro, L., Kuulkers, E., Amati, L., Antonelli, L. A., Costa, E., ...
We report on BeppoSAX simultaneous X- and gamma-ray observations of the bright gamma-ray burst (GRB) 990123. We present the broad-band spectrum of the prompt emission, including optical, X- and...
The puzzling case of GRB 990123: multiwavelength afterglow study (2005)
Maiorano, E., Masetti, N., Palazzi, E., Frontera, F., Grandi, P., Pian, E., ...
We report on the BeppoSAX data analysis of the afterglow of Gamma-Ray Burst (GRB) 990123, one of the brightest GRBs detected by BeppoSAX. Mainly due to its exceptional brightness, this is the only...
The puzzling case of GRB 990123: prompt emission and broad-band afterglow modeling (2005)
Corsi, A., Piro, L., Kuulkers, E., Amati, L., Antonelli, L. A., Costa, E., ...
We report on BeppoSAX simultaneous X- and gamma-ray observations of the bright GRB 990123. We present the broad-band spectrum of the prompt emission, including optical, X- and gamma-rays, confirming...
The INTEGRAL View of the Galactic Nucleus (2005)
Goldwurm, A., Belanger, G., Goldoni, P., Paul, J., Terrier, R., Falanga, M., ...
We present the preliminary results of the observational campaign performed in 2003 to study the Galactic Nucleus with INTEGRAL. The mosaicked images obtained with the IBIS/ISGRI coded aperture...
Two-phase X-ray burst from GX 3+1 observed by INTEGRAL (2005)
Chenevez, J., Falanga, M., Brandt, S., Farinelli, R., Frontera, F., Goldwurm, A., ...
We present an analysis of an anomalously long X-ray burst from the low-mass X-ray binary system GX~3+1 observed by INTEGRAL on August 31, 2004. The burst is characterized by two distinct phases: an...
Two-phase X-ray burst from GX 3+1 observed by INTEGRAL (2005)
Chenevez, J., Falanga, M., Brandt, S., Farinelli, R., Frontera, F., Goldwurm, A., ...
We present an analysis of an anomalously long X-ray burst from the low-mass X-ray binary system GX~3+1 observed by INTEGRAL on August 31, 2004. The burst is characterized by two distinct phases: an...
Kuulkers, E., Shaw, S., Paizis, A., Mowlavi, N., Courvoisier, T., Ebisawa, K., ...
The Galactic Bulge is a region rich in bright and variable high-energy X-ray and gamma-ray sources. From February 17, 2005 and onwards we will observe this region regularly, using the European...
INTEGRAL observes fading of GRO J1655-40 above 20 keV (2005)
Shaw, S., Kuulkers, E., Paizis, A., Mowlavi, N., Courvoisier, T., Ebisawa, K., ...
We have observed a decrease in the the hard X-ray flux (above 20 keV) from the black hole binary GRO J1655-40, of about a factor of two (in four days), using INTEGRAL. This object has been observed...
INTEGRAL monitoring of IGR J17098-3628 (2005)
Mowlavi, N., Kuulkers, E., Rodriguez, J., Shaw, S., Paizis, A., Courvoisier, T., ...
IGR J17098-3628 (ATEL #444) has been observed by INTEGRAL in the Galactic Bulge Monitoring program (ATEL #438). We detected the source with ISGRI in observations during 2005, March 26 00:00, April 2...
INTEGRAL observations of XTE J1818-245 (2005)
Shaw, S.E., Kuulkers, E., Turler, M., Mowlavi, N., Courvoisier, T., Markwardt, C., ...
The IBIS/ISGRI instrument aboard INTEGRAL has observed the transient black hole candidate XTE J1818-245 (ATel #578) during seven 1800 second exposures of the Galactic Bulge region between UTC...
INTEGRAL detects XTE J1739-285 (2005)
Bodghee, A., Mowlavi, N., Kuulkers, E., Wijnands, R.A.D., Shaw, S.E., Courvoisier, T., ...
The JEM-X telescope on board INTEGRAL detected the X-ray transient XTE J1739-285 while monitoring the Galactic Bulge in revolution 350. The source was detected in three successive pointings of 30...
Brightening of H1743-322 and the Rapid Burster (2005)
Kretschmar, P., Shaw, S.E., Kuulkers, E., Wijnands, R.A.D., Turler, M., Mowlavi, N., ...
Observations done on Aug 17 and 21, 2005 as part of the INTEGRAL Galactic Bulge monitoring campaign show further brightening of H1743-322 (ATel #575,#576) and an outburst of the rapid burster (4U...
Correction: Rapid Burster = MXB 1730-335 (2005)
Kretschmar, P., Shaw, S.E., Kuulkers, E., Wijnands, R.A.D., Turler, M., Mowlavi, N., ...
In ATel #593, the Rapid Burster was also labeled 4U 1730-335, an identifier found in the SIMBAD database. Walter H.G. Lewin has brought to our attention that this is a misnomer, since the Rapid...
INTEGRAL sees XTE J1739-285 change to hard state (2005)
Shaw, S.E., Kuulkers, E., Oosterbroek, T., Courvoisier, T.J.-L., Paizis, A., Ebisawa, K., ...
Continuing INTEGRAL Galactic Bulge Monitoring observations have detected the X-ray transient XTE J1739-285 above 20 keV. XTE J1739-285 was first detected by INTEGRAL during JEM-X observations on...
Type-I X-ray bursts from XTE J1739-285 (2005)
Brandt, S., Kuulkers, E., Bazzano, A., Courvoisier, T.J.-L., Domingo, A., Ebisawa, K., ...
During the Galactic Bulge Monitoring and Galactic Centre Scan observations performed with INTEGRAL, two X-ray flares coming from XTE J1739-285 were observed with the X-ray monitor JEM-X (3-25 keV)....
On the (hard) X-ray activity of SAX J1747.0-2853 as seen with INTEGRAL (2005)
Kuulkers, E., Kretschmar, P., Brandt, S., Wijnands, R.A.D., Courvoisier, T.J.-L., Ebisawa, K., ...
Following the report of the X-ray activity of the neutron star transient SAX J1747.0-2853 (ATels #637, #638, #641) we add that its current outburst was detected by INTEGRAL on Oct 10 and 12, 2005....
Wijnands, R.A.D., Maccarone, T., Klis, M. Van Der, Rupen, M., ...
The Galactic Center region was observed in a series of 7 pointings with the Chandra X-ray Observatory on 5 June 2005 01:44-13:08 UTC. During these observations we found that the two faint X-ray...
Renewed activity of the neutron star X-ray transient SAX J1747.0-2853 (2005)
Wijnands, R.A.D., Klis, M. Van Der, Rupen, M., Wang, Q.D., ...
An X-ray transient was detected in outburst on 18 October 2005 during one of our Chandra/HRC-I observations as part of the XMM-Newton/Chandra monitoring campaign of the 1.7 square degree around Sgr...
Further Chandra observations of SAX J1747.0-2853 and the region around Sgr A* (2005)
Wijnands, R.A.D., Rupen, M., Steeghs, D., Wang, Q.D., Cackett, E., Kuulkers, E., ...
On 20-21 October 2005, the remaining six Chandra/HRC-I observations (as mentioned in ATEL #637) were performed as part of the XMM-Newton/ Chandra monitoring campaign of the 1.7 square degree region...
Bel, M. Cadolle, Rodriguez, J., Sizun, P., Farinelli, R., Del Santo, M., Goldwurm, A., ...
We report the results of extensive high-energy observations of the X-ray transient and black hole candidate XTE J1720-318 performed with INTEGRAL, XMM-Newton and RXTE. The source, which underwent an...
The INTEGRAL View of the Galactic Nucleus (2004)
Goldwurm, A., Belanger, G., Goldoni, P., Paul, J., Terrier, R., Falanga, M., ...
We present the preliminary results of the observational campaign performed in 2003 to study the Galactic Nucleus with INTEGRAL. The mosaicked images obtained with the IBIS/ISGRI coded aperture...
New BeppoSAX-WFC results on superbursts (2004)
Cornelisse, R., Kuulkers, E., Verbunt, F., Heise, J.
Presently seven superbursters have been identified representing 10% of the total Galactic X-ray burster population. Four superbursters were discovered with the Wide Field Cameras (WFCs) on BeppoSAX...
A decreasing column density during the prompt emission from GRB000528 observed with BeppoSAX (2004)
Frontera, F., Amati, L., Lazzati, D., Montanari, E., Orlandini, M., Perna, R., ...
We report observation results of the prompt X-- and $\gamma$--ray emission from GRB 000528. This event was detected with the Gamma-Ray Burst Monitor and one of the two Wide Field Cameras aboard the...
INTEGRAL monitoring of the Black Hole candidate 1E 1740.7-2942 (2004)
Del Santo, M., Bazzano, A., Smith, D. M., Bassani, L., Bird, A. J., Bouchet, L., ...
The brightest persistent Galactic black hole candidate close to the Galactic Centre, 1E 1740.7-2942, has long been observed with INTEGRAL. In this paper, we report on the long-term hard X-ray...
The INTEGRAL LMXRB Monitoring Programme (2004)
Paizis, A., Courvoisier, T. J. -L., Vilhu, O., Chernyakova, M., Tikkanen, T., Bazzano, A., ...
Our collaboration is responsible for the study of a sample of 72 low mass X-ray binaries (LMXRB) using the INTEGRAL Core Programme data. In this paper we describe the monitoring programme we have...
Thermonuclear burst physics with RXTE (2004)
Galloway, D. K., Chakrabarty, D., Cumming, A., Kuulkers, E., Bildsten, L., Rothschild, R.
Recently we have made measurements of thermonuclear burst energetics and recurrence times which are unprecedented in their precision, largely thanks to the sensitivity of the Rossi X-ray Timing...
XMM-Newton observations of the INTEGRAL X-ray transient J17544-2619 (2004)
Gonzalez-Riestra, R., Oosterbroek, T., Kuulkers, E., Orr, A., Parmar, A. N.
On 2003 September 17 INTEGRAL discovered a bright transient source 3 degrees from the Galactic Center, IGR J17544-2619. The field containing the transient was observed by XMM-Newton on 2003 March 17...
New outburst from 4U0115+634 (2004)
Lutovinov, A., Budtz-Jorgensen, C., Turler, M., Kretschmar, P., Hermsen, W., Kuulkers, E.
During the last galactic plane scans performed with the INTEGRAL observatory on 29 Aug, 2004 an increase of the flux from 4U0115+634 was detected, that can be connected with the beginning of possible...
X-ray spectral and timing properties of the 2001 superburst of 4U 1636-536 (2004)
Kuulkers, E., Zand, J. In 't, Homan, J., Straaten, S. Van, Altamirano, D., Klis, M. Van Der
Bel, M. Cadolle, Rodriguez, J., Sizun, P., Farinelli, R., Del Santo, M., Goldwurm, A., ...
We report the results of extensive high-energy observations of the X-ray transient and black hole candidate XTE J1720-318 performed with INTEGRAL, XMM-Newton and RXTE. The source, which underwent an...
Detection of hard X-ray emission from the Galactic nuclear region with INTEGRAL (2004)
Belanger, G., Goldwurm, A., Goldoni, P., Paul, J., Terrier, R., Falanga, M., ...
This letter presents the first results of an observational campaign to study the Galactic Centre with INTEGRAL. The mosaicked images obtained with the IBIS/ISGRI coded aperture instrument in the...
The INTEGRAL View of the Galactic Nucleus (2004)
Goldwurm, A., Belanger, G., Goldoni, P., Paul, J., Terrier, R., Falanga, M., ...
We present the preliminary results of the observational campaign performed in 2003 to study the Galactic Nucleus with INTEGRAL. The mosaicked images obtained with the IBIS/ISGRI coded aperture...
The INTEGRAL View of the Galactic Nucleus (2004)
Goldwurm, A., Belanger, G., Goldoni, P., Paul, J., Terrier, R., Falanga, M., ...
We present the preliminary results of the observational campaign performed in 2003 to study the Galactic Nucleus with INTEGRAL. The mosaicked images obtained with the IBIS/ISGRI coded aperture...
Bel, M. Cadolle, Rodriguez, J., Sizun, P., Farinelli, R., Del Santo, M., Goldwurm, A., ...
We report the results of extensive high-energy observations of the X-ray transient and black hole candidate XTE J1720-318 performed with INTEGRAL, XMM-Newton and RXTE. The source, which underwent an...
Detection of hard X-ray emission from the Galactic nuclear region with INTEGRAL (2004)
Belanger, G., Goldwurm, A., Goldoni, P., Paul, J., Terrier, R., Falanga, M., ...
This letter presents the first results of an observational campaign to study the Galactic Centre with INTEGRAL. The mosaicked images obtained with the IBIS/ISGRI coded aperture instrument in the...
Detection of hard X-ray emission from the Galactic nuclear region with INTEGRAL (2003)
Belanger, G., Goldwurm, A., Goldoni, P., Paul, J., Terrier, R., Falanga, M., ...
This letter presents the first results of an observational campaign to study the Galactic Centre with INTEGRAL. The mosaicked images obtained with the IBIS/ISGRI coded aperture instrument in the...
A superburst from 4U 1254-690 (2003)
Kuulkers, E., Verbunt, F., Heise, J., Cornelisse, R.
We report the detection with the BeppoSAX Wide Field Cameras of a superburst from 4U 1254-690. The superburst is preceded by a normal type-I X-ray burst, has a decay time that is the longest of all...
The INTEGRAL ground segment and its science operations centre (2003)
Much, R., Barr, P., Hansson, L., Kuulkers, E., Maldari, P., Nolan, J., ...
The INTEGRAL ground segment is divided into operational and scientific components. The operational component consists of the Mission Operations Centre, the ground stations and communications lines...
Galloway, D. K., Cumming, A., Kuulkers, E., Bildsten, L., Chakrabarty, D., Rothschild, R. E.
We analyze 24 type I X-ray bursts from GS 1826-24 observed by the Rossi X-ray Timing Explorer between 1997 November and 2002 July. The bursts observed between 1997-98 were consistent with a stable...
First INTEGRAL Observations of Eight Persistent Neutron Star Low Mass X-ray Binaries (2003)
Paizis, A., Beckmann, V., Courvoisier, T. J. -L., Vilhu, O., Lutovinov, A., Ebisawa, K., ...
Early results from the INTEGRAL Core Program, for a sample of eight persistently bright neutron star low mass X-ray binaries in the energy range from 5 keV to 200 keV are presented. It is shown that...
Peculiar spectral and power spectral behaviour of the LMXB GX 13+1 (2003)
Schnerr, R. S., Reerink, T., Homan, J., Méndez, M., Fender, R. P., ...
We present results of an analysis of all 480 ks of Rossi X-ray Timing Explorer Proportional Counter Array data obtained from 17 May 1998 to 11 October 1998 on the luminous low mass X-ray binary GX...
Six years of BeppoSAX Wide Field Cameras observations of nine galactic type-I X-ray bursters (2003)
Cornelisse, R., Verbunt, F., Kuulkers, E., Heise, J., Hartog, P. R. Den, ...
We present an overview of BeppoSAX Wide Field Cameras observations of the nine most frequent type-I X-ray bursters in the Galactic center region. Six years of observations (from 1996 to 2002) have...
The complete Z-diagram of LMC X-2 (2003)
Smale, A. P., Homan, J., Kuulkers, E.
We present results from four Rossi X-ray Timing Explorer (RXTE) observations of the bright low mass X-ray binary LMC X-2. During these observations, which span a year and include over 160 hrs of...
Hulleman, F., Markwardt, C. B., Mendez, M., Kuulkers, E., Cornelisse, R., ...
GRS 1747-312 is a bright transient X-ray source in the globular cluster Terzan 6 with quasi-periodic outbursts approximately every 4.5 months. We carried out 2-60 keV target-of-opportunity...
Mirax: A Brazilian X-Ray Astronomy Satellite Mission (2003)
Braga, J., Rothschild, R., Heise, J., Staubert, R., Remillard, R., D'Amico, F., ...
We describe the ``Monitor e Imageador de Raios-X'' (MIRAX), an X-ray astronomy satellite mission proposed by the high energy astrophysics group at the National Institute for Space Research (INPE) in...
Burst-properties as a function of mass accretion rate in GX 3+1 (2003)
Hartog, P. R. Den, Kuulkers, E., Cornelisse, R., Heisse, J., Bazzano, A., ...
GX 3+1 is a low-mass X-ray binary that is persistently bright since its discovery in 1964. It was found to be an X-ray burster twenty years ago proving that the compact object in this system is a...
The Faint Sky Variability Survey - I. Goals and data reduction process (2003)
Groot, P.J., Vreeswijk, P.M., Huber, M.E., Everett, M., Howell, S.B., Nelemans, G.A., ...
Peculiar spectral and power spectral behaviour of the LMXB GX 13+1 (2003)
Schnerr, R.S., Reerink, T., Klis, M. Van Der, Homan, J., Mendez, R.M., Fender, R.P., ...
Photospheric radius expansion X-ray bursts as standard candles (2002)
Kuulkers, E., Hartog, P. R. Den, Verbunt, F. W. M., Harris, W. E., Cocchi, M.
We examined the maximum bolometric peak luminosities during type I X-ray bursts from the persistent or transient luminous X-ray sources in globular clusters. We show that for about two thirds of the...
XMM-Newton detection of Nova Muscae 1991 in quiescence (2002)
Sutaria, F.K., Kolb, U., Charles, P., Osborne, J.P., Kuulkers, E., Casares, J., ...
The soft X-ray transient GU Mus has been detected by XMM-Newton in the quiescent state. The source is very faint, with a 0.5-10.0 keV unabsorbed flux of =~ 1.1 x 10-14 ergs cm-2 s-1. The spectra is...
Chandra follow-up of bursters with low persistent emission (2002)
Cornelisse, R., Verbunt, F., Kuulkers, E., Heise, J.
We report on Chandra ACIS-S observations of five type I X-ray bursters with low persistent emission: SAX J1324.5-6313, SAX J1752.3-3128, SAX J1753.5-2349, SAX J1806.5-2215 and SAX J1818.7+1424. We...
BeppoSAX Wide Field Cameras observations of six type I X-ray bursters (2002)
Cornelisse, R., Verbunt, F., Kuulkers, E., Heise, J., Remillard, R. A., ...
We have discovered three certain (SAX J1324.5-6313, 2S 1711-339 and SAX J1828.5-1037) and two likely (SAX J1818.7+1424 and SAX J2224.9+5421) new thermonuclear X-ray burst sources with the BeppoSAX...
XMM-Newton detection of Nova Muscae 1991 in Quiescence (2002)
Sutaria, F. K., Kolb, U., Charles, P. A., Osborne, J. P., Kuulkers, E., Casares, J., ...
The soft X-ray transient GU Mus has been detected by XMM-Newton in the quiescent state. The source is very faint, with a 0.5-10.0 keV unabsorbed flux of $\simeq 1.1 \times 10^{-14}$ ergs cm$^{-2}$...
The nature of the X-ray transient SAX J1711.6-3808 (2002)
Markwardt, C. B., Bazzano, A., Cocchi, M., Cornelisse, R., Heise, J., ...
SAX J1711.6-3808 is an X-ray transient in the Galactic bulge that was active from January through May of 2001 and whose maximum 1-200 keV luminosity was measured to be 5X10-9 erg/s/cm2 which is less...
Discovery of the neutron star nature of SLX 1737-282 (2002)
Verbunt, F., Kuulkers, E., Markwardt, C., Bazzano, A., Cocchi, M., ...
SLX 1737-282 is a persistent moderately bright X-ray source 1.2 deg from the Galactic center. X-ray observations with the Wide Field Cameras on BeppoSAX have for the first time revealed the true...
The X-ray fast-time variability of Sco X-2 (GX 349+2) with RXTE (2002)
O'Neill, P. M., Kuulkers, E., Sood, R. K.
Sco X-2 (GX 349+2) is a low-mass X-ray binary and Z source. We have analysed 156 ks of Rossi X-ray Timing Explorer data, obtained in 1998 January, on this source. We investigated the fast-time...
On the Spectral Evolution of Cygnus X-2 along its Color-Color Diagram (2002)
Di Salvo, T., Farinelli, R., Burderi, L., Frontera, F., Kuulkers, E., Masetti, N., ...
We report on the results of a broad band (0.1-200 keV) spectral study of Cyg X-2 using two BeppoSAX observations taken in 1996 and 1997, respectively, for a total effective on-source time of ~100 ks....
Low Quiescent X-Ray and Radio Flux Levels from the Black Hole Transient V4641 Sgr (2002)
Tomsick, J.A., Rupen, M.P., Corbel, S., Dhawan, V., Fender, R.P., Kaaret, P., ...
X-ray bursts at extreme mass accretion rates from GX 17+2 (2002)
Kuulkers, E., Homan, J., Klis, M. Van Der, Lewin, W.H.G., Mendez, R.M.
On the spectral evolution of Cygnus X-2 along its color-color diagram (2002)
Salvo, T. Di, Farinelli, R., Burderi, L., Frontera, F., Kuulkers, E., Masetti, N., ...
Astronomy Astrophysics Discovery of the neutron star nature of SLX 1737-282 (2002)
F. Verbunt, E. Kuulkers, C. B. Markwardt, A. Bazzano, M. Cocchi, R. Cornelisse, ...
Abstract. SLX 1737−282 is a persistent moderately bright X-ray source 1. ◦ 2 from the Galactic center. X-ray observations with the Wide Field Cameras on BeppoSAX have for the first time revealed...
Emission from the secondary star in the old cataclysmic variable WZ Sagittae (2001)
Steeghs, D., Marsh, T., Knigge, C., Maxted, P.F.L., Kuulkers, E., Skidmore, W.
Wang, Z., Chakrabarty, D., Roche, P., Charles, P. A., Kuulkers, E., Shahbaz, T., ...
We present multiband optical/IR photometry of V4580 Sgr, the optical counterpart of the accretion-powered millisecond pulsar SAX J1808.4-3658, taken during the 1998 X-ray outburst of the system. The...
Emission from the secondary star in the old cataclysmic variable WZ Sagittae (2001)
Steeghs, D., Marsh, T.R., Knigge, C., Maxted, P.F.L., Kuulkers, E., Skidmore, W.
We present the first detection of the mass donor star in the cataclysmic variable WZ Sagittae. Phase-resolved spectroscopy reveals narrow Balmer emission components from the irradiated secondary star...
A half-a-day long thermonuclear X-ray burst from KS 1731-260 (2001)
Kuulkers, E., Van Kerkwijk, M. H., Cornelisse, R., Smith, D. A., Heise, J., ...
We report on an approximately twelve hour long X-ray flare from the low-mass X-ray binary KS 1731-260. The flare has a rise time of less than 13 min and declines exponentially with a decay time of...
A four-hours long burst from Serpens X-1 (2001)
Cornelisse, R., Kuulkers, E., Verbunt, F., Heise, J.
During a serendipitous observation of the BeppoSAX Wide Field Cameras, a very long Type I X-ray burst was observed from the low mass X-ray binary Serpens X-1. The burst lasted for approximately 4...
Discovery of the X-ray burster SAX J1752.3-3138 (2001)
Cocchi, M., Bazzano, A., Natalucci, L., Ubertini, P., Heise, J., Kuulkers, E., ...
During a 50 ks monitoring observation of the Galactic bulge performed in September 1999 by the Wide Field Cameras on board the BeppoSAX satellite, an X-ray burst was detected from a sky position ~3...
Long-term X-ray variability and state transition of GX 339-4 (2001)
Kong, A. K. H., Charles, P. A., Kuulkers, E., Kitamoto, S.
With extensive monitoring data spanning over 30 years from Vela 5B, Ariel 5, Ginga, Compton Gamma Ray Observatory, Rossi X-ray Timing Explorer and BeppoSAX, we find evidence for long-term X-ray...
BeppoSAX measurements of the bright gamma-ray burst 010222 (2001)
Kuiper, L.M., Amati, L., Antonelli, L.A., Butler, R.C., Costa, E., ...
Emission from the secondary star in the old CV WZ Sge (2001)
Steeghs, D., Marsh, T., Knigge, C., Maxted, P., Kuulkers, E., Skidmore, W.
We present the first detection of the mass donor star in the cataclysmic variable WZ Sge. Phase resolved spectroscopy reveals narrow Balmer emission components from the irradiated secondary star...
The IR counterpart of the black-hole candidate 4U 1630-47 (2001)
Augusteijn, T., Kuulkers, E., Van Kerkwijk, M. H.
We present K band photometry of the region including the radio error box of the soft X-ray transient 4U 1630-47 during its 1998 outburst. We detect a variable source at K=16.1 mag located inside the...
Frontera, F., Zdziarski, A. A., Amati, L., Mikolajewska, J., Belloni, T., Del Sordo, S., ...
We report on results of a target of opportunity observation of the X-ray transient XTE J1118+480 performed on 2000 April 14-15 with the Narrow Field Instruments (0.1-200 keV) of the SAX satellite....
A black hole in the superluminal source SAX J1819.3-2525 (V4641 Sgr) (2001)
Orosz, J.A., Kuulkers, E., Klis, M. Van Der, McClintock, J.E., Garcia, M.R., Callanan, P.J., ...
X-ray bursts at extreme mass accretion rates from GX 17+2 (2001)
Kuulkers, E., Homan, J., Lewin, W. H. G., Mendez, M.
(abridged version) We report on ten type I X-ray bursts from GX 17+2 in data obtained with the RXTE/PCA in 1996--2000. Three bursts were short in duration (~10 s), whereas the others lasted for ~6-25...
A Sample of Radius-Expansion Bursters Observed by the BeppoSAX-WFCs (2001)
Cocchi, Massimo, Bazzano, A., Natalucci, L., Ubertini, P., Heise, J., Kuulkers, E., ...
Since 1996 a monitoring campaign of the Galactic Bulge region has been performed by the BeppoSAX Wide Field Cameras in the 2-28 keV band. This allowed accurate and unbiased studies of classes of...
BeppoSAX measurements of the bright gamma-ray burst 010222 (2001)
Kuiper, L., Amati, L., Antonelli, L. A., Butler, R. C., Costa, E., ...
We analyze the BeppoSAX measurements of the prompt and afterglow emission of the gamma-ray burst GRB010222. Among 45 GRBs detected with the Wide Field Cameras on BeppoSAX, the 40-700 keV fluence of...
The first outburst of SAX J1808.4-3658 revisited (2001)
Cornelisse, R., Kuulkers, E., Heise, J., Kuiper, L., Bazzano, A., ...
Data of the 1996 outburst of the single-known accreting millisecond pulsar SAX J1808.4-3658, taken with the Wide Field Cameras (WFCs) on BeppoSAX, are revisited with more complete data coverage and...
Broadband X-Ray spectra of the persistent black hole candidates LMC X-1 and LMC X-3 (2001)
Haardt, F., Galli, M.R., Treves, A., Chiapetti, L., Dal Fiume, D., Corongiu, A., ...
We have compiled and analysed reports from the literature of (quasi-)simultaneous observations of X-ray transients at radio and X-ray wavelengths and compared them with each other and with more...
A Black Hole in the Superluminal Source SAX J1819.3-2525 (V4641 Sgr) (2001)
Orosz, J.A., Kuulkers, E., Klis, M. Van Der, McClintock, J.E., Garcia, M.R., Callanan, P.J., ...
An Atlas of Burst Oscillations and Spectral Properties in 4U 1728-34 (2001)
Straaten, S. Van, Klis, M. Van Der, Kuulkers, E., Mendez, R.M.
Discovery of a Transient Absorption Edge in the X-ray Spectrum of GRB 990705 (2000)
Amati, L., Frontera, F., Vietri, M., Soffitta, P., Costa, E., ...
We report the discovery of a transient equivalent hydrogen column density with an absorption edge at ~3.8 kiloelectron volts in the spectrum of the prompt x-ray emission of gamma-ray burst (GRB)...
Discovery of a redshifted Iron K-line in the X-ray afterglow of GRB 000214 (2000)
Antonelli, L. A., Piro, L., Vietri, M., Costa, E., Soffitta, P., Feroci, M., ...
We report the detection (3 sigma significance level) of a strong iron emission line in the X-ray spectrum of the afterglow of GRB 000214 (``Valentine's Day Burst'') observed by BeppoSAX. An emission...
Broad-band X-ray spectra of the persistent black hole candidates LMC X-1 and LMC X-3 (2000)
Haardt, F., Galli, M. R., Treves, A., Chiappetti, L., Fiume, D. Dal, Corongiu, A., ...
We report on observations of the two persistent black hole candidates LMC X-3 and LMCX-1 performed with \BS in October 1997. The flux of LMC X-1 was possibly measured up to 60 keV, but there is a...
Natalucci, L., Bazzano, A., Cocchi, M., Ubertini, P., Heise, J., Kuulkers, E., ...
We report on our discovery and follow-up observations of the X-ray source SAX J1747.0-2853 detected in outburst on 1998, March 10 with the BeppoSAX Wide Field Cameras in the energy range 2-28 keV....
Paerels, Frits, Brinkman, A. C., Kaastra, J. S., Kuulkers, E., ...
We find resolved interstellar O K, Ne K, and Fe L absorption spectra in the Chandra Low Energy Transmission Grating Spectrometer spectrum of the low mass X-ray binary X0614+091. We measure the column...
X-ray afterglow detection of the short gamma-ray burst 991014 (2000)
Kuiper, L., Amati, L., Antonelli, L. A., Hurley, K., Coletta, A., ...
GRB 991014 is one of the shortest gamma-ray bursts detected so far with the Wide Field Cameras aboard BeppoSAX, both in gamma-rays and X-rays. The duration is 9.6 sec in 2-28 keV and 3.2 sec in 40 to...
Simultaneous radio and X-ray observations of Galactic Centre low mass X-ray binaries (2000)
Berendsen, S. G. H., Fender, R., Kuulkers, E., Heise, J.
We have performed simultaneous X-ray and radio observations of thirteen Galactic centre low-mass X-ray binaries in 1998 April using the Wide-Field Cameras onboard BeppoSAX and the Australia Telescope...
Discovery of 1RXS J171824.2-402934 as an X-ray burster (2000)
Kaptein, R. G., Kuulkers, E., Verbunt, F., Heise, J., Cornelisse, R.
We report the first-time detection of a type-I X-ray burst from a position that is consistent with that of 1RXS J171824.2-402934. The detection was made on Sep 23, 1996, with the Wide Field Cameras...
Turmoil on the accretion disk of GRO J1655-40 (2000)
Kuulkers, E., Cornelisse, R., Heise, J., Kong, A. K. H., Charles, P. A., ...
During the 1996/1997 outburst of the X-ray transient GRO J1655-40 the Wide Field Cameras onboard BeppoSAX observed the system with nearly continuous coverage during some stages of this outburst. On...
Cornelisse, R., Heise, J., Kuulkers, E., Verbunt, F.
A long flux enhancement, with an exponential decay time of 86 min, is detected in 4U 1735-44 with the BeppoSAX Wide Field Cameras. We argue that this is a type-I X-ray burst, making it the longest...
Bright X-ray bursts from 1E 1724-3045 in Terzan 2 (2000)
Cocchi, M., Bazzano, A., Natalucci, L., Ubertini, P., Heise, J., Kuulkers, E., ...
During about 3 years wide field monitoring of the Galactic Center region by the WFC telescopes on board the BeppoSAX satellite, a total of 14 type-I X-ray bursts were detected from the burster 1E...
GRB990510: on the possibility of a beamed X-ray afterglow (2000)
Kuulkers, E., Antonelli, L. A., Kuiper, L., Kaastra, J. S., Amati, L., Costa, E., ...
We discuss the prompt emission of the gamma-ray burst (GRB) 990510 and its subsequent X-ray afterglow from 8.0 to 44.3 hrs after the prompt emission, using observations with the Gamma-ray Burst...
Observations of Eddington-limited type-I X-ray bursts from 4U 1812-12 (2000)
Cocchi, M., Bazzano, A., Natalucci, L., Ubertini, P., Heise, J., Kuulkers, E., ...
During more than 3 years (August 1996-October 1999) monitoring of a 40x40 degree sky region around the Galactic Centre by the Wide Field Cameras on board BeppoSAX, a total of 8 type-I bursts have...
SAX J1810.8-2609: A New Hard X-ray Bursting Transient (2000)
Natalucci, L., Bazzano, A., Cocchi, M., Ubertini, P., Heise, J., Kuulkers, E., ...
The transient X-ray source SAX J1810.8-2609 was discovered on 1998, March 10 with the Wide Field Cameras on board the BeppoSAX satellite, while observing the Galactic Bulge in the 2-28 keV energy...
The Off State of GX 339-4 (2000)
Kong, A. K. H., Kuulkers, E., Charles, P. A., Homer, L.
We report BeppoSAX and optical observations of the black hole candidate GX 339-4 during its X-ray `off' state in 1999. The broad-band (0.8-50 keV) X-ray emission can be fitted by a single power law...
BeppoSAX observations of the nearby low-mass X-ray binary and fast transient SAX J1819.3-2525 (2000)
Kuulkers, E., Bazzano, A., Cornelisse, R., Cocchi, M., Heise, J., ...
SAX J1819.3-2525 is a nearby X-ray transient which exhibited a fast and large X-ray outburst on Sep. 15, 1999 (Smith et al. 1999). The Wide Field Cameras and the Narrow Field Instruments (NFI) on...
Spectral and timing properties of the low/hard states in LMC X-3 (2000)
Boyd, P.T., Smale, A.P., Homan, J., Klis, M. Van Der, Jonker, P.G., Kuulkers, E., ...
A black hole in the superluminal source SAX J1819.3-2525 (V4641 Sgr (2000)
Orosz, J.A., Kuulkers, E., Klis, M. Van Der, McClintock, J.E., Garcia, M.R., Callanan, P.J., ...
Spectral and Timing Properties of the Low/Hard States in LMC X-3 (2000)
Boyd, P.T., Smale, A.P., Homan, J., Klis, M. Van Der, Jonker, P.G., Kuulkers, E., ...
Black Hole in the Superluminal source SAX J1819.3-2525 (V4641 Sgr (2000)
Orosz, J.A., Kuulkers, E., Klis, M. Van Der, McClintock, J.E., Garcia, M.R., Callanan, P.J., ...
No QPO time lags from Sco X-1 as seen with EXOSAT: a comparison with Cyg X-2 (2000)
Dieters, S., Vaughan, B.A., Kuulkers, E., Lamb, F.K., Klis, M. Van Der
The timing evolution of 4U 1630-47 during its 1998 outburst (2000)
Dieters, S., Belloni, T., Kuulkers, E., Woods, P.M., Cui, W., Chen, W., ...
Near-infrared detection and optical follow-up of the GRB 990705 afterglow (2000)
Masetti, N., Palazzi, E., Pian, E., Hunt, L.K., Mendez, R.M., Frontera, F., ...
Discovery of a ~1Hz quasi-periodic oscillation in the low-mass X-ray binary 4U 1746-37 (2000)
Jonker, P.G., Klis, M. Van Der, Homan, J., Wijnands, R.A.D., Paradijs, J.A. Van, Mendez, R.M., ...
The power spectral properties of the Z source GX 340+0 (2000)
Jonker, P.G., Klis, M. Van Der, Wijnands, R.A.D., Homan, J., Paradijs, J.A. Van, Mendez, R.M., ...
Canonical timing and spectral behavoir of LMC X-3 in the low/hard state (2000)
Boyd, P.T., Smale, A.P., Homan, J., Jonker, P.G., Klis, M. Van Der, Kuulkers, E.
Simultaneous radio and X-ray observations of Galactic center low-mass X-ray binaries (2000)
Berendsen, S.G.H., Fender, R.P., Kuulkers, E., Heise, J., Klis, M. Van Der
The Timing Evolution of 4U 1630-47 during Its 1998 Outburst (2000)
Dieters, S, Belloni, T, Kuulkers, E, Woods, P, Cui, W, Zhang, SN, ...
The Timing Evolution of 4U 1630-47 During its 1998 Outburst (1999)
Dieters, S. W., Belloni, T., Kuulkers, E., Woods, P., Cui, W., Zhang, S. N., ...
We report on the evolution of the timing of 4U1630-47 during its 1998 outburst using data obtained with the Rossi X-ray Timing Explorer (RXTE). The count rate and position in hardness-intensity,...
The orbital period of the recurrent X-ray transient in Terzan 6 (1999)
Bazzano, A., Cocchi, M, Cornelisse, R., Heise, J., Kuiper, L., ...
Four or five new outbursts were detected of the bright X-ray transient GRS 1747-312 in the globular cluster Terzan 6 between 1996 and 1999, through monitoring campaigns with the Wide Field Cameras...
X-ray/Optical Bursts from GS 1826-24 (1999)
Kong, A. K. H., Homer, L., Kuulkers, E., Charles, P. A., Smale, A. P.
We report results from the first simultaneous X-ray (RXTE) and optical (SAAO) observations of the low-mass X-ray binary GS 1826-24 in June 1998. A type-I burst was detected in both X-ray and optical...
A new bursting X-ray transient: SAX J1750.8-2900 (1999)
Natalucci, L., Cornelisse, R., Bazzano, A., Cocchi, M., Ubertini, P., Heise, J., ...
We have analysed in detail the discovery measurements of the X-ray burster SAX J1750.8-2900 by the Wide Field Cameras on board BeppoSAX in spring 1997, at a position ~1.2 degrees off the Galactic...
Broad-band X-ray measurements of GS 1826-238 (1999)
Heise, J., Kuulkers, E., Bazzano, A., Cocchi, M., Ubertini, P.
The broad band X-ray spectrum of the low-mass X-ray binary (LMXB) GS1826-238 was measured with the narrow-field instruments on BeppoSAX on April 6 and 7, 1997. The spectrum is consistent with the...
BeppoSAX observations of the 1998 outburst of 4U 1630-47 (1999)
Oosterbroek, T., Parmar, A.N., Kuulkers, E., Belloni, T., Klis, M. Van Der, Frontera, F., ...
Multiple ejections during the 1975 outburst of A0620-00 (1999)
Kuulkers, E., Fender, R.P., Spencer, R.E., Davis, R.J., Morison, I.
Multiwavelength superoutburst observations of T Leonis (1999)
Howell, S.B., Ciardi, D.R., Szkody, P., Paradijs, J.A. Van, Kuulkers, E., Cash, J., ...
Radio and X-Ray Observations of the 1998 Outburst of the Recurrent X-Ray Transient 4U 1630-47 (1999)
Hjellming, RM, Rupen, MP, Mioduszewski, AJ, Kuulkers, E, McCollough, M, Harmon, BA, ...
The rotation speed of the companion star in V395 Car (=2S0921--630) (1998)
Shahbaz, T., Kuulkers, E., Charles, P. A., Casares, J., Van Paradijs, J.
We have obtained high resolution optical spectroscopy of the accretion disc corona source 2S0921--630 (=V395 Car) that constrains the spectral type of the companion star to be most probably K0III. At...
The 1998 outburst of the X-ray transient 4U 1630-47 observed with BeppoSAX (1998)
Oosterbroek, T., Parmar, A. N., Kuulkers, E., Belloni, T., Frontera, F., ...
We report results of five pointed BeppoSAX observations of the black hole candidate 4U 1630-47 during part of its 1998 outburst when the 2-10 keV source luminosity decreased from 2.1x10^38 erg/s (for...
The eclipsing X-ray pulsar X-7 in M33 (1998)
Dubus, G., Charles, P. A., Long, K. S., Hakala, P. J., Kuulkers, E.
Using our extensive ROSAT X-ray observations of M33, we confirm a 3.45 day eclipse period for the Einstein source X-7 (Larson & Schulman, 1997) and discover evidence for a 0.31-s pulse period. The...
Long-Term X-ray Variability in GX 354-0 (1998)
Kong, A. K. H., Charles, P. A., Kuulkers, E.
We report for the first time the detection of long-term X-ray variability in the bright bulge source GX 354-0 (=4U 1728-34) observed with the All Sky Monitor (ASM) on board the Rossi X-Ray Timing...
The Beat-Frequency Interpretation of Kilohertz QPOs in Neutron Star Low-Mass X-ray Binaries (1998)
Psaltis, D., Mendez, M., Wijnands, R., Homan, J., Jonker, P. G., ...
Pairs of quasi-periodic oscillations (QPOs) at kilohertz frequencies are a common phenomenon in several neutron-star low-mass X-ray binaries. The frequency separation of the QPO peaks in the pair...
Absorption dips in GRO 1655-40: mapping the inner accretion disk (1998)
Kuulkers, E., Wijnands, R.A.D., Belloni, T., Mendez, R.M., Klis, M. Van Der, Paradijs, J.A. Van
A varying kHz peak seperation in 4U 1608-52 (1998)
Mendez, R.M., Klis, M. Van Der, Paradijs, J.A. Van, Lewin, W.H.G., Vaughan, B.A., Kuulkers, E., ...
The beat frequency interpretation of kiloHertz QPO's in neutron star low-mass X-ray binaries (1998)
Psaltis, D., Mendez, R.M., Wijnands, R.A.D., Homan, J., Jonker, P.G., Klis, M. Van Der, ...
Discovery of a second kHz QPO in 4U 1608-52 (1998)
Mendez, R.M., Klis, M. Van Der, Paradijs, J.A. Van, Lewin, W.H.G., Vaughan, B.A., Kuulkers, E., ...
Discovery of kHz QPO in the Z source cygnus X-1 (1998)
Wijnands, R.A.D., Homan, J., Klis, M. Van Der, Kuulkers, E., Paradijs, J.A. Van, Lewin, W.H.G., ...
A varying kHz peak separation in 4U 1608-52 (1998)
Mendez, M., Klis, M. Van Der, Paradijs, J. Van, Lewin, W.H.G., Vaughan, B., Kuulkers, E., ...
Absorption dips in GRO J1655+40: mappin the inner accretion disk (1998)
Kuulkers, E., Wijnands, R., Belloni, T., Mendez, M., Klis, M. Van Der, Paradijs, J. Van
Discovery of kHz quasi-periodic oscillations in the Z source Cygnus X-2 (1998)
Wijnands, R., Homan, J., Klis, M. Van Der, Kuulkers, E., Paradijs, J. Van, Lewin, W.H.G., ...
Absorption dips in the light curves of GRO J1655-40 and 4U 1630-47 during outburst (1998)
Kuulkers, E., Wijnands, R., Belloni, T., Mendez, M., Klis, M. Van Der, Paradijs, J. Van
Discovery of a second KHZ qpo peak in 4U 1608-52 (1998)
Mendez, M., Klis, M. Van Der, Lewin, W.H.G., Vaughan, B.A., Kuulkers, E., Zhang, W., ...
Discovery of kilohertz quasi-periodic oscillations in 4U 1735-44 (1998)
Wijnands, R., Klis, M. Van Der, Mendez, M., Paradijs, J. Van, Lewin, W.H.G., Lamb, F.K., ...
Discovery of a 57-69 HZ quasi-periodic oscillation in GX 13+1 (1998)
Homan, J., Klis, M. Van Der, Wijnands, R., Vaughan, B., Kuulkers, E.
Discovery of kilohertz quasi-periodic oscillations in the Z source GX 340+0 (1998)
Jonker, P.G., Wijnands, R., Klis, M. Van Der, Psaltis, D., Kuulkers, E., Lamb, F.K.
Erratum: discovery of microsecond time lags in kilohertz QPOs (1998)
Vaughan, B.A., Klis, M. Van Der, Mendez, M., Paradijs, J. Van, Wijnands, R.A.D., Lewin, W.H.G., ...
The 1998 outburst of the X-ray transient 4U 1630-47 observed with BeppoSAX (1998)
Oosterbroek, T., Parmar, A.N., Kuulkers, E., Belloni, T., Klis, M. Van Der, Frontera, F., ...
Discovery of kilohertz quasi-periodic oscillations in the Z source GX 5-1 (1998)
Wijnands, R.A.D., Mendez, R.M., Klis, M. Van Der, Psaltis, D., Kuulkers, E., Lamb, F.K.
Erratum: discovery of microsecond time lags in kilohertz QPO's (1998)
Vaughan, B.A., Klis, M. Van Der, Mendez, R.M., Paradijs, J.A. Van, Wijnands, R.A.D., Lewin, W.H.G., ...
Absorption dips in the light curve of GRO J1655-40 and 4U 1630-47 during outburst (1998)
Kuulkers, E., Wijnands, R.A.D., Belloni, T., Mendez, R.M., Klis, M. Van Der, Paradijs, J.A. Van
Discovery of kilohertz quasi-periodic oscillations in the Z source GX 340+0 (1998)
Jonker, P.G., Wijnands, R.A.D., Klis, M. Van Der, Psaltis, D., Kuulkers, E., Lamb, F.K.
Discovery of a 57-69 Hz quasi-periodic oscillation in GX 13+1 (1998)
Homan, J., Klis, M. Van Der, Wijnands, R.A.D., Vaughan, B.A., Kuulkers, E.
Discovery of X-rays from the supernova remnant G0.9+0.1 (1997)
Sidoli, L., Israel, G. L., Chiappetti, L., Treves, A., Orlandini, M., Kuulkers, E., ...
During the $BeppoSAX$ survey of the Galactic Center region, we have discovered X-ray emission from the central region of the supernova remnant G0.9+0.1. The high interstellar absorption (N_H about 3...
A varying kHz peak separation in 4U 1608-52 (1997)
Mendez, M., Van Paradijs, J., Lewin, W. H. G., Vaughan, B. A., Kuulkers, E., ...
Using a new technique to improve the sensitivity to weak Quasi-Periodic Oscillations (QPO) we discovered a new QPO peak at about 1100 Hz in the March 1996 outburst observations of 4U 1608-52,...
Discovery of a second kHz QPO peak in 4U 1608-52 (1997)
Mendez, M., Van Paradijs, J., Lewin, W. H. G., Vaughan, B. A., Kuulkers, E., ...
Using a new technique to improve the sensitivity to weak Quasi-Periodic Oscillations (QPO) we discovered a new QPO peak at about 1100 Hz in the March 1996 outburst observations of 4U 1608-52,...
On the outburst amplitude of the soft X-ray transients (1997)
We find a strong correlation between the optical outburst amplitude Delta V and orbital period P_{orb} for the soft X-ray transient sources with orbital periods less than 1 day. By fitting the...
Complex outburst behaviour from the black-hole candidate 4U 1630-47 (1997)
Kuulkers, E., Parmar, A. N., Kitamoto, S., Cominsky, L. R., Sood, R. K.
We present data from different epochs in 1978, 1987-1991 and 1996 from the black-hole candidate 4U1630-47. For the first time we present almost complete coverage of the outbursts which started in...
Low-energy line emission from Cygnus X-2 observed with the BeppoSAX LECS (1997)
Kuulkers, E., Parmar, A. N., Owens, A., Oosterbroek, T., Lammers, U.
We present a 0.2-10 keV spectrum of the low-mass X-ray binary Cygnus X-2 obtained using the Low Energy Concentrator Spectrometer on-board Bepposax. The spectrum can be described by a cut-off...
Ginga observations of Cygnus X-2 (1997)
Wijnands, R. A. D., Kuulkers, E., Asai, K., Hasinger, G.
We analysed all X-ray data on the low-mass X-ray binary Cygnus X-2 obtained with Ginga. The analysis of the spectral and fast timing behaviour of these 4 years of data provides new insights in the...
GX 17+2: X-ray spectral and timing behaviour of a bursting Z source (1997)
Kuulkers, E., Oosterbroek, T., Van Paradijs, J., Lewin, W. H. G.
We investigated the properties of the Z pattern of the low-mass X-ray binary GX 17+2 in the X-ray colour-colour diagrams (CDs) and hardness-intensity diagrams (HIDs), and of the power spectra as a...
Discovery of kiloHertz quasi-periodic oscillations in GX 17+2 (1997)
Wijnands, R.A.D., Homan, J., Klis, M. Van Der, Mendez, R.M., Kuulkers, E., Paradijs, J.A. Van, ...
Optical photometry of Sco X-2 (1997)
Barziv, O., Kuulkers, E., Mendez, R.M., Hooft, F. Van Der, Groot, P.J., Klis, M. Van Der, ...
Kilohertz QPO and atoll states in 4U 0614+09 (1997)
Mendez, R.M., Klis, M. Van Der, Paradijs, J.A. Van, Lewin, W.H.G., Lamb, F.K., Vaughan, B.A., ...
Microsecond time lags in kiloHertz QPO (1997)
Vaughan, B.A., Klis, M. Van Der, Wijnands, R.A.D., Mendez, R.M., Paradijs, J.A. Van, Lewin, W.H.G., ...
GX 17+2: spectral and timing behaviour of a bursting Z source (1997)
Kuulkers, E., Klis, M. Van Der, Oosterbroek, T., Paradijs, J.A. Van, Lewin, W.H.G.
Wijnands, R.A.D., Klis, M. Van Der, Paradijs, J.A. Van, Lewin, W.H.G., Lamb, F.K., Vaughan, B.A., ...
Ginga observations of Cygnus X-2 (1997)
Wijnands, R.A.D., Klis, M. Van Der, Kuulkers, E., Asai, K., Hasinger, G.
Discovery of microsecond time lags in kilohertz QPOs (1997)
Vaughan, B.A., Klis, M. Van Der, Mendez, R.M., Paradijs, J.A. Van, Wijnands, R.A.D., Lamb, F.K., ...
Discovery of 800 Hz QPO in 4U1608-52 (1996)
Berger, M., Van Paradijs, J., Lewin, W. H. G., Lamb, F., Vaughan, B., ...
We present results of RXTE observations of the low-mass X-ray binary and atoll source 4U 1608$-$52 made over 9 days during the decline of an X-ray intensity outburst in March 1996. A fast-timing...
4U 1636-536 and 4U 0614+091 (1996)
Klis, M. Van Der, Paradijs, J. Van, Lewin, W.H.G., Lamb, F.K., Vaughan, B., Kuulkers, E., ...
Discovery of 800 Hz QPO in 4U 1608-52 (1996)
Berger, M., Klis, M. Van Der, Paradijs, J.A. Van, Lewin, W.H.G., Lamb, F.K., Vaughan, B.A., ...
The low-energy concentrator spectrometer on-board the SAX X-ray astronomy satellite (1996)
Parmar Martin Bavdaz, A. N. Parmar, M. Bavdaz, F. Favata, E. Kuulkers, ...
. -- The payload of the Italian/Dutch spacecraft SAX includes a set of four X-ray concentrators each of geometric area 124 cm 2 together with imaging gas scintillation proportional counter detectors...
Spectral and correlated timing behaviour: erratum (1995)
Kuulkers, E., Klis, M. Van Der, Oosterbroek, T., Asai, K., Dotani, T., Paradijs, J. Van, ...
Circinus X-1 revisited: fast-timing properties in relation to spectral state (1995)
Oosterbroek, T., Klis, M. Van Der, Kuulkers, E., Paradijs, J.A. Van, Lewin, W.H.G.
GX 5-1 with EXOSAT: how to become a Z source (1994)
Kuulkers, E., Klis, M. Van Der, Oosterbroek, T., Paradijs, J.A. Van
GX 5-1 and GX 17+2 with EXOSAT: New insights in two z sources (1994)
Kuulkers, E., Klis, M. Van Der, Oosterbroek, T., Paradijs, J.A. Van, Lewin, W.H.G.
New insights in two Z soures (1994)
Kuulkers, E., Klis, M. Van Der, Oosterbroek, T., Paradijs, J.A. Van, Lewin, W.H.G.
Spectral variations along the branches in GX 5-1 (1994)
Asai, K., Dotani, T., Mitsuda, K., Nagase, F., Kamado, Y., Kuulkers, E., ...
Spectral and correlated timing behaviour of GX 5-1 (1994)
Kuulkers, E., Klis, M. Van Der, Oosterbroek, T., Asai, K., Dotani, T., Paradijs, J.A. Van, ...
Relativistic Fe line emission and highly photoionized absorption in GROJ1655-40
Parmar, A., Miller, J. M., Kuulkers, E.
We report on two XMM-Newton and simultaneous INTEGRAL observations of the microquasar GRO J1655-40 during its 2005 outburst. The source was most probably in its high-soft state during both...