Swift follow-up observations of 17 INTEGRAL sources of uncertain or unknown nature (2008)
Rodriguez, J., Tomsick, J. A., Chaty, S.
(abridged) We analysed data from observations of 17 INTEGRAL sources made with the Swift satellite. We refine the position of the hard X-ray sources to an accuracy of a few arcsec. We then browsed...
Heras, J. A. Zurita, Chaty, S.
SAX J1818.6-1703 is a flaring transient X-ray source serendipitously discovered by BeppoSAX in 1998 during an observation of the Galactic centre. The source was identified as a High-Mass X-ray Binary...
Multi-wavelength X-ray/mid-infrared observations of GRS 1915+105 (2008)
Rahoui, F., Chaty, S., Rodriguez, J., Fuchs, Y., Mirabel, I. F.
We report preliminary results of mid-infrared (MIR) and X-ray observations of GRS 1915+105 that we carried out between 2004 October 2 and 2006 June 5. Our main goals were to study its variability, to...
Mid-infrared VISIR and Spitzer observations of the surroundings of the magnetar SGR 1806-20 (2008)
Rahoui, F., Chaty, S., Lagage, P. O.
We report mid-infrared observations of SGR 1806-20 and its environment - with the highest spatial resolution in this domain to date - using ESO/VISIR in 2005 and 2006, and we retrieved...
IGR J18483-0311: a new intermediate supergiant fast X-ray transient (2008)
IGR J18483-0311 is a high-mass X-ray binary recently discovered by INTEGRAL. Its periodic fast X-ray transient activity and its position in the Corbet diagram - although ambiguous - led to the...
INTEGRAL sources: from obscured high mass X-ray binaries to supergiant fast X-ray transients (2008)
A new type of high-energy binary system has been revealed by the INTEGRAL satellite. These sources are being unveiled by means of multi-wavelength optical, near- and mid-infrared observations. Among...
Heras, J. A. Zurita, Chaty, S.
AX J1749.1-2733 is an unclassified transient X-ray source discovered during surveys by ASCA in 1993-1999. A multi-wavelength study in NIR, optical, X-rays and hard X-rays is undertaken in order to...
Adaptive optics near-infrared observations of magnetars (2007)
Testa, V., Rea, N., Mignani, R. P., Israel, G. L., Perna, R., Chaty, S., ...
. We report on near-infrared (IR) observations of the three anomalous X-ray pulsars XTE J1810-197, 1RXS J1708-4009, 1E 1841-045 and the soft gamma-ray repeater SGR 1900+14, taken with the ESO-VLT,...
Swift Follow-up Observations of INTEGRAL Sources of Unknown Nature (2007)
Rodriguez, J., Tomsick, J. A., Chaty, S.
(Abridged) We made use of X-ray observations with the X-ray telescope on-board the \swift observatory to refine the X-ray position to 3-5" accuracy of 12 INTEGRAL sources, so as to further identify...
Bimodal spectral variability of Cygnus X-1 in an intermediate state (2007)
Malzac, J., Petrucci, P.O., Jourdain, E., Cadolle Bel, M., Sizun, P., Pooley, G., ...
We report the results of an observation of Cygnus X-1 with INTEGRAL, that we combine with simultaneous radio observations with the Ryle telescope. Both spectral and variability properties of the...
Bimodal spectral variability of Cygnus X-1 in an intermediate state (2007)
Malzac, J., Petrucci, P.O., Jourdain, E., Cadolle Bel, M., Sizun, P., Pooley, G., ...
We report the results of an observation of Cygnus X-1 with INTEGRAL, that we combine with simultaneous radio observations with the Ryle telescope. Both spectral and variability properties of the...
Bimodal spectral variability of Cygnus X-1 in an intermediate state (2007)
Malzac, J., Petrucci, P.O., Jourdain, E., Cadolle Bel, M., Sizun, P., Pooley, G., ...
We report the results of an observation of Cygnus X-1 with INTEGRAL, that we combine with simultaneous radio observations with the Ryle telescope. Both spectral and variability properties of the...
Bel, M. Cadolle, Ribo, M., Rodriguez, J., Chaty, S., Corbel, S., Goldwurm, A., ...
We report the results of simultaneous multiwavelength observations of the X-ray transient source SWIFT J1753.5-0127 performed with INTEGRAL, RXTE, NTT, REM and VLA on 2005 August 10-12. The source,...
Bel, M. Cadolle, Ribo, M., Rodriguez, J., Chaty, S., Corbel, S., Goldwurm, A., ...
We report the results of simultaneous multiwavelength observations of the X-ray transient source SWIFT J1753.5-0127 performed with INTEGRAL, RXTE, NTT, REM and VLA on 2005 August 10-12. The source,...
Hunting the nature of IGR J17497-2821 with X-ray and NIR observations (2006)
Paizis, A., Nowak, M. A., Chaty, S., Rodriguez, J., Courvoisier, T. J. -L., Del Santo, M., ...
We report on a Chandra grating observation of the recently discovered hard X-ray transient IGR J17497-2821. The observation took place about two weeks after the source discovery at a flux level of...
Pellizza, L. J., Chaty, S., Negueruela, I.
One of the most recent discoveries of the INTEGRAL observatory is the existence of a previously unknown population of X-ray sources in the inner arms of the Galaxy. IGR J17544-2619, IGR J16465-4507...
Bimodal spectral variability of Cygnus X-1 in an intermediate state (2005)
Malzac, J., Petrucci, P. O., Jourdain, E., Cadolle, M., Sizun, P., Pooley, G., ...
We report the results of an observation of Cygnus X-1 with INTEGRAL, that we combine with simultaneous radio observations with the Ryle telescope. Both spectral and variability properties of the...
Bimodal spectral variability of Cygnus X-1 in an intermediate state (2005)
Malzac, J., Petrucci, P.O., Jourdain, E., Cadolle Bel, M., Sizun, P., Pooley, G., ...
We report the results of an observation of Cygnus X-1 with INTEGRAL, that we combine with simultaneous radio observations with the Ryle telescope. Both spectral and variability properties of the...
Bimodal spectral variability of Cygnus X-1 in an intermediate state (2005)
Malzac, J., Petrucci, P.O., Jourdain, E., Cadolle Bel, M., Sizun, P., Pooley, G., ...
We report the results of an observation of Cygnus X-1 with INTEGRAL, that we combine with simultaneous radio observations with the Ryle telescope. Both spectral and variability properties of the...
Foschini, L., Chiaberge, M., Grandi, P., Grenier, I. A., Guainazzi, M., Hermsen, W., ...
The analysis of an INTEGRAL AO2 observation of the error contours of the EGRET source 3EG J1621+8203 is presented. The only source found inside the error contours for energies between 20 and 30 keV...
Integral observation of Cyg X-1 in an intermediate state (2004)
Malzac, J., Petrucci, P. O., Jourdain, E., Sizun, P., Cadolle, M., Pooley, G., ...
We present preliminary results of an observation of Cygnus X-1 with INTEGRAL performed on June 7-11 2003. Both spectral and variability properties of the source indicate that Cygnus X-1 was in an...
The X-ray source IGR J16318-4848 was the first source discovered by INTEGRAL. The high energy spectrum exhibits such a high column density that the source is undetectable in X-rays below 2 keV. We...
INTEGRAL observation of 3EG J1736-2908 (2004)
Di Cocco, G., Foschini, L., Grandi, P., Malaguti, G., Castro-Tirado, A. J., Chaty, S., ...
The possible identification by INTEGRAL of the EGRET source 3EG J1736-2908 with the active galactic nucleus GRS 1734-292 is discussed. The latter was discovered in 1990 and later identified with a...
Multi-wavelength INTEGRAL NEtwork (MINE) observations of the microquasar GRS 1915+105 (2004)
Fuchs, Yael, Rodriguez, J., Shaw, S. E., Kretschmar, P., Ribo, M., Chaty, S., ...
We present the international collaboration MINE (Multi-lambda Integral NEtwork) aimed at conducting multi-wavelength observations of X-ray binaries and microquasars simultaneously with the INTEGRAL...
Study of Unidentified EGRET sources with INTEGRAL: first results and future prospects (2004)
Di Cocco, G., Castro-Tirado, A. J., Chaty, S., Dean, A. J., Del Santo, M., Foschini, L., ...
The primary objective of the study of unidentified EGRET sources with INTEGRAL is to locate with a few arcminute accuracy the hard X-ray / soft gamma-ray counterparts within the EGRET error circle or...
Quasar jet emission model applied to the microquasar GRS 1915+105 (2004)
Turler, M., Courvoisier, T. J. -L., Chaty, S., Fuchs, Y.
The true nature of the radio emitting material observed to be moving relativistically in quasars and microquasars is still unclear. The microquasar community usually interprets them as distinct...
INTEGRAL observation of 3EG J1736-2908 (2004)
Cocco, G. Di, Foschini, L., Grandi, P., Malaguti, G., Castro-Tirado, A.J., Chaty, S., ...
The possible identification by INTEGRAL of the EGRET source 3EG J1736-2908 with the active galactic nucleus GRS 1734-292 is discussed. The latter was discovered in 1990 and later identified with a...
Simultaneous multi-wavelength observations of microquasars(the MINE collaboration) (2004)
Fuchs, Y., Rodriguez, J., Mirabel, I. F., Shaw, S. E., Kretschmar, P., Ribó, M., ...
Multi-wavelength INTEGRAL network (MINE) observations of the microquasar GRS 1915+105 (2004)
Fuchs, Yaël, Rodriguez, J., Shaw, S. E., Kretschmar, P., Ribó, M., Chaty, S., ...
Simultaneous multi-wavelength observations of Microquasars (the mine collaboration) (2004)
Brown , I., Chaty , S., Dhawan , V., Fuchs , Y., Hannikainen , D. C., Kretschmar , P., ...
Presentamos la colaboración internacional MINE (Multi- INTEGRAL NEtwork) cuya meta es llevar a cabo observaciones en múltiples longitudes de onda de microcuasares de forma simultánea al satélite...
Revealing the nature of the highly obscured galactic Source IGR J16318-4848 (2004)
La fuente de rayos X IGR J16318 - 4848 fue la primera fuente descubierta por INTEGRAL el 29 de enero. Llevamos a cabo observaciones en el óptico y el infrarrojo cercano (NIR) en el European South...
Simultaneous multi-wavelength observations of microquasars (the MINE collaboration) (2003)
Fuchs, Yael, Rodriguez, J., Mirabel, I. F., Shaw, S. E., Kretschmar, P., Ribo, M., ...
We present the international collaboration MINE (Multi-lambda INTEGRAL NEtwork) aimed at conducting multi-wavelength observations of microquasars simultaneously with the INTEGRAL satellite. The first...
Chaty, S., Haswell, C.A., Malzac, J., Hynes, R.I., Shrader, C.R., Cui, W.
We report multiwavelength observations of the soft X-ray transient XTE J1118+480, which we observed with UKIRT, Hubble Space Telescope (HST), RXTE, Extreme Ultraviolet Explorer (EUVE) and many other...
Hynes, R.I., Haswell, C.A., Cui, W., Shrader, C.R., O'Brien, K., Chaty, S., ...
The transient black-hole binary XTE J1118+480 exhibited dramatic rapid variability at all wavelengths which were suitably observed during its 2000 April–July outburst. We examine time-resolved...
Fuchs, Yael, Rodriguez, J., Chaty, S., Ribo, M., Mirabel, I. F., Dhawan, V., ...
We present the international collaboration MINE (Multi-lambda Integral NEtwork) aimed at conducting multi-wavelength observations of X-ray binaries and microquasars simultaneously with INTEGRAL. The...
Simultaneous multi-wavelength observations of GRS 1915+105 (2003)
Fuchs, Yael, Rodriguez, J., Mirabel, I. F., Chaty, S., Ribo, M., Dhawan, V., ...
We present the result of multi-wavelength observations of the microquasar GRS 1915+105 in a plateau state with a luminosity of ~7.5x10^{38) erg s-1 (~40% L_Edd), conducted simultaneously with the...
Chaty, S., Haswell, C. A., Malzac, J., Hynes, R. I., Shrader, C. R., Cui, W.
We report multiwavelength observations of the soft X-ray transient (SXT) XTE J1118+480, which we observed with UKIRT, HST, RXTE, EUVE and many other instruments and facilities. Adding radio (Ryle...
Hynes, R. I., Haswell, C. A., Cui, W., Shrader, C. R., O'Brien, K., Chaty, S., ...
The transient black hole binary XTE J1118+480 exhibited dramatic rapid variability at all wavelengths which were suitably observed during its 2000 April-July outburst. We examine time-resolved X-ray,...
Chaty, S., Charles, P. A., Marti, J., Mirabel, I. F., Rodriguez, L. F., Shahbaz, T.
We present photometric and spectroscopic optical and near-infrared (NIR) observations (Based on observations collected at the European Southern Observatory, Chile (ESO ID 63.H-0493 and 64.H-0382))...
Chaty, S., Haswell, C. A., Malzac, J., Hynes, R. I., Shrader, C. R., Cui, W.
We report multiwavelength observations of the soft X-ray transient XTE J1118 + 480, which we observed with UKIRT, Hubble Space Telescope (HST), RXTE, Extreme Ultraviolet Explorer (EUVE) and many...
Hynes, R. I., Haswell, C. A., Cui, W., Shrader, C. R., O'Brien, K., Chaty, S., ...
The transient black-hole binary XTE J1118 + 480 exhibited dramatic rapid variability at all wavelengths which were suitably observed during its 2000 April-July outburst. We examine time-resolved...
Simultaneous multi-wavelength observations of GRS 1915+105 (2003)
Fuchs, Y., Rodriguez, J., Mirabel, I. F., Chaty, S., Ribó, M., Dhawan, V., ...
Identification of a 12-17 day timescale in X-ray observations of GRS 1915+105 (2002)
Greenhough, J., Chapman, S. C., Chaty, S., Dendy, R. O., Rowlands, G.
Measurement of the energy emitted from accreting astrophysical systems provides an observational constraint on the plasma processes that may be operating within the disk. Here we examine the...
The Infrared Counterpart of the X-ray Burster KS 1731--260 (2002)
Mignani, R. P., Chaty, S., Mirabel, F., Mereghetti, S.
We present JK' infrared images of the X-ray transient KS 1731--260, obtained in 1997 and in 1998 with IRAC2b at the ESO/MPI 2.2-m telescope at La Silla. Using as a reference the recent Chandra...
The evolving accretion disc in the black hole X-ray transient XTE J1859+226 (2002)
Hynes, R.I., Haswell, C.A., Chaty, S., Shrader, C.R., Cui, W.
We present HST, RXTE, and UKIRT observations of the broad-band spectra of the black hole X-ray transient XTE J1859+226 during the decline from its 1999–2000 outburst. Our UV spectra define the...
Study of the Largest Multiwavelength Campaign of the Microquasar GRS 1915+105 (2002)
Ueda, Y., Yamaoka, K., Sanchez-Fernandez, C., Dhawan, V., Chaty, S., Grove, J. E., ...
We present the results from a multiwavelength campaign of GRS 1915+105 performed from 2000 April 16 to 25. This is one of the largest coordinated set of observations ever performed for this source,...
X-ray/UV correlations in XTE J1118+480: disc, jet, or something else? (2002)
Hynes, R.I., Haswell, C.A., Chaty, S., Cui, W., Shrader, C.R., Brien, K. O', ...
Near Infrared Observations of Galactic Black Hole Candidates (2001)
Chaty, S., Mirabel, I. F., Goldoni, P., Mereghetti, S., Marti, J., ...
We report on several European Southern Observatory (ESO) near-infrared (NIR) observational campaigns aimed at understanding the nature of galactic black hole candidates. Our results, including NIR...
The Evolving Accretion Disc in the Black Hole X-ray Transient XTE J1859+226 (2001)
Hynes, R. I., Haswell, C. A., Chaty, S., Shrader, C. R., Cui, W.
We present HST, RXTE, and UKIRT observations of the broad band spectra of the black hole X-ray transient XTE J1859+226 during the decline from its 1999-2000 outburst. Our UV spectra define the 2175A...
A search for radio emission from Galactic supersoft X-ray sources (2001)
Ogley, R. N., Chaty, S., Crocker, M., Eyres, S. P. S., Kenworthy, M. A., Richards, A. M. S., ...
We have made a deep search for radio emission from all the northern hemisphere supersoft X-ray sources using the VLA and MERLIN telescopes, at 5 and 8.4 GHz. Three previously undetected sources: T...
Chaty, S., Haswell, C.A., Hynes, R.I., Shrader, C.R., Cui, W., Mauche, C.W., ...
We report here on multiwavelength observations of the two new soft X-ray transients (SXTs) XTE J1859+226 and XTE J1118+480, which we observed with HST/RXTE/UKIRT. For XTE J1118+480 we also used EUVE...
Chaty, S., Haswell, C. A., Hynes, R. I., Shrader, C. R., Cui, W.
We report multiwavelength observations of the two soft X-ray transients (SXTs) XTE J1859+226 and XTE J1118+480, which we observed with HST, RXTE and UKIRT. The two sources exhibited very different...
Characterising anomalous transport in accretion disks from X-ray observations (2001)
Greenhough, J., Chapman, S. C., Chaty, S., Dendy, R. O., Rowlands, G.
Whilst direct observations of internal transport in accretion disks are not yet possible, measurement of the energy emitted from accreting astrophysical systems can provide useful information on the...
Complete and simultaneous spectral observations of the black hole X-Ray nova XTE J1118+480 (2001)
McClintock, J.E., Haswell, C.A., Garcia, M.R., Drake, J.J., Hynes, R.I., Marshall, H.L., ...
The X-ray nova XTE J1118+480 suffers minimal extinction (b = 62) and therefore represents an outstanding opportunity for multiwavelength studies. Hynes et al. conducted the first such study, which...
Complete and Simultaneous Spectral Observations of the Black-Hole X-ray Nova XTE J1118+480 (2001)
McClintock, J. E., Haswell, C. A., Garcia, M. R., Drake, J. J., Hynes, R. I., Marshall, H. L., ...
The X-ray nova XTE J1118+480 suffers minimal extinction (b = 62 degrees) and therefore represents an outstanding opportunity for multiwavelength studies. Hynes et al. (2000) conducted the first such...
Chaty, S., Haswell, C. A., Hynes, R. I., Shrader, C. R., Cui, W., Mauche, C. W., ...
We report here on multiwavelength observations of the two new soft X-ray transients (SXTs) XTE J1859+226 and XTE J1118+480, which we observed with HST/RXTE/UKIRT. For XTE J1118+480 we also used EUVE...
On the nature of the microquasar V4641 Sagittari (2001)
Chaty, S., Mirabel, I. F, Marti, J., Rodriguez, L. F.
We present photometric and spectroscopic optical and near-infrared (NIR) observations (Based on observations collected at the European Southern Observatory, Chile (ESO ID 63.H-0493 and 64.H-0382))...
Recent Hubble Space Telescope results on X-ray novae (2001)
Hynes, R.I., Haswell, C.A., Chaty, S., Shrader, C.R., Cui, W., Mauche, C.W.
RXTE has recently discovered two newoptically bright black hole candidates (BHCs): XTE J1859+226 andXTE J1118+480. We observed both with HST/STIS, the firstoutburst observations of X-ray novae with...
VHE gamma rays from binary systems (2001)
Chadwick, P.M., Chaty, S., Daniel, M.K., Haswell, C.A., Kolb, U., McComb, T.J.L., ...
With new generation VHE telescopes, X-ray binary systems become very promising targets for VHE γ-ray observations. In particular, if sources with relativistic jets are thought of as galactic...
Chaty, S., Rodriguez, L. F., Mirabel, I. F., Geballe, T. R., Fuchs, Y., Claret, A., ...
We have observed an extended region surrounding the first discovered galactic superluminal source GRS 1915+105, seeking evidence of interaction between the relativistic ejecta of that object and the...
On the nature of the microquasar V4641 Sagittarii (2000)
Chaty, S., Mirabel, I. F., Marti, J., Rodriguez, L. F.
We present photometric and spectroscopic optical and near-infrared (NIR) observations taken during the outburst on September 1999 of the source V4641 Sgr = SAX J1819.3-2525 (in'tzand et al., 2000) =...
Search for interactions between ejections of GRS 1915+105 and its environment (2000)
Chaty, S., Rodriguez, L. F., Mirabel, I. F.
To unravel the effect of likely interactions between the energetic ejections of the galactic superluminal source GRS 1915+105 and its surrounding interstellar medium, we observed its environment. Two...
A Search for the Optical/Infrared Counterpart of the Anomalous X-ray Pulsar 1E 1841-045 (2000)
Mereghetti, S., Mignani, R. P., Covino, S., Chaty, S., Israel, G. L., Neuhäuser, R., ...
We have carried out a search for the optical and infrared counterpart of the Anomalous X-ray Pulsar 1E 1841-045, which is located at the center of the supernova remnant Kes73. We present the first...