New X-ray observations of the old nova CP Puppis and of the more recent nova V351 Pup (2008)
Orio, M., Mukai, K., Bianchini, A., De Martino, D., Howell, S.
We present X-ray observations of the field containing Nova Puppis 1942 (CP Pup) and Nova Puppis 1991 (V351 Pup), done with ASCA in 1998, and with XMM-Newton in 2005. The X-ray and UV luminosity of CP...
Two new Intermediate Polars with a soft X-ray component (2008)
Anzolin, G., De Martino, D., Mouchet, M., Gaensicke, B. T., Matt, G., ...
We analyze the first X-ray observations with XMM-Newton of RXS J070407.9+262501 and 1RXS 180340.0+401214, in order to characterize their broad-band temporal and spectral properties, also in the...
Butters, O. W., Norton, A. J., Hakala, P., Mukai, K., Barlow, E. J.
Aims: We determine the nature of the intermediate polar candidates XSS J00564+4548, IGR J17195-4100, and XSS J12270-4859. Methods: Pointed RXTE observations searched for intermediate polar...
1RXSJ173021.5-055933: a cataclysmic variable with a fast-spinning magnetic white dwarf (2008)
De Martino, D., Matt, G., Mukai, K., Falanga, M., Gaensicke, B. T., ...
We present the first X-ray observations with the XMM-Newton and INTEGRAL satellites of the recently discovered cataclysmic variable 1RXSJ173021.5-055933, together with simultaneous UV and coordinated...
Novae as a Class of Transient X-ray Sources (2008)
Mukai, K., Orio, M., Della Valle, M.
Motivated by the recently discovered class of faint (10^34-10^35 ergs/s) X-ray transients in the Galactic Center region, we investigate the 2-10 keV properties of classical and recurrent novae....
1RXS J173021.5-055933: a cataclysmic variable with a fast-spinning magnetic white dwarf (2008)
De Martino, D., Matt, G., Mukai, K., Falanga, M., Gänsicke, B. T., ...
Broad-band X-ray properties of magnetic cataclysmic variables (2008)
De Martino, D., Matt, G., Mukai, K., Falanga, M., Haberl, F., ...
Corbet, R. H. D., Sokoloski, J. L., Mukai, K., Markwardt, C. B., Tueller, J.
We present an analysis of the X-ray variability of three symbiotic X-ray binaries, GX 1+4, 4U 1700+24, and 4U 1954+31, using observations made with the Swift Burst Alert Telescope (BAT) and the Rossi...
RXTE confirmation of the intermediate polar status of Swift J0732.5-1331 (2007)
Butters, O. W., Barlow, E. J., Norton, A. J., Mukai, K.
Aims.We intend to establish the X-ray properties of Swift J0732.5-1331 and therefore confirm its status as an intermediate polar. Methods: We analysed 36,240 s of X-ray data from RXTE. Frequency...
RXTE confirmation of the Intermediate Polar status of Swift J0732.5-1331 (2007)
Butters, O. W., Barlow, E. J., Norton, A. J., Mukai, K.
Aims. We intend to establish the X-ray properties of Swift J0732.5-1331 and therefore confirm its status as an intermediate polar. Method. We analysed 36,240 s of X-ray data from RXTE. Frequency...
A precessing accretion disc in the intermediate polar XY Arietis? (2007)
Context: XY Ari is the only intermediate polar to show deep X-ray eclipses of its white dwarf. Previously published observations with Ginga and Chandra have also revealed a broad X-ray orbital...
A precessing accretion disc in the intermediate polar XY Ari? (2007)
XY Ari is the only intermediate polar to show deep X-ray eclipses of its white dwarf. Previously published observations with Ginga and Chandra have also revealed a broad X-ray orbital modulation,...
X-ray confirmation of the intermediate polar HT Cam (2006)
De Martino, D., Matt, G., Mukai, K., Gaensicke, B.T., Gonzalez Perez, J.M., ...
We report on the first pointed X-ray observations with XMM-Newton and RXTE satellites of the X-ray source RXJ0757.0+6306=HT Cam. We detect a strong 515s X-ray modulation confirming the optical...
X-ray confirmation of the intermediate polar HT Cam (2006)
De Martino, D., Matt, G., Mukai, K., Gaensicke, B.T., Gonzalez Perez, J.M., ...
We report on the first pointed X-ray observations with XMM-Newton and RXTE satellites of the X-ray source RXJ0757.0+6306=HT Cam. We detect a strong 515s X-ray modulation confirming the optical...
X-ray confirmation of the intermediate polar HT Cam (2006)
De Martino, D., Matt, G., Mukai, K., Gaensicke, B.T., Gonzalez Perez, J.M., ...
We report on the first pointed X-ray observations with XMM-Newton and RXTE satellites of the X-ray source RXJ0757.0+6306=HT Cam. We detect a strong 515s X-ray modulation confirming the optical...
Ishisaki, Y., Maeda, Y., Fujimoto, R., Ozaki, M., Ebisawa, K., Takahashi, T., ...
We have developed a framework for the Monte-Carlo simulation of the X-Ray Telescopes (XRT) and the X-ray Imaging Spectrometers (XIS) onboard Suzaku, mainly for the scientific analysis of spatially...
Adsorption states of NO on the Pt(111) step surface (2006)
Tsukahara, N., Mukai, K., Yamashita, Y., Yoshinobu, J., Aizawa, H.
Using infrared reflection absorption spectroscopy (IRAS) and scanning tunneling microscopy (STM), we investigated the adsorption states of NO on the Pt(9 9 7) step surface. At 90 K, we observe three...
Adsorption states of NO on the Pt(111) step surface (2006)
Tsukahara, N., Mukai, K., Yamashita, Y., Yoshinobu, J., Aizawa, H.
Using infrared reflection absorption spectroscopy (IRAS) and scanning tunneling microscopy (STM), we investigated the adsorption states of NO on the Pt(9 9 7) step surface. At 90 K, we observe three...
Adsorption states of NO on the Pt(111) step surface (2006)
Tsukahara, N., Mukai, K., Yamashita, Y., Yoshinobu, J., Aizawa, H.
Using infrared reflection absorption spectroscopy (IRAS) and scanning tunneling microscopy (STM), we investigated the adsorption states of NO on the Pt(9 9 7) step surface. At 90 K, we observe three...
Cyclotron resonance energies at a low X-ray luminosity: A0535+262 observed with Suzaku (2006)
Terada, Y., Mihara, T., Nakajima, M., Suzuki, M., Isobe, N., Makishima, K., ...
The binary X-ray pulsar A0535+262 was observed with the Suzaku X-ray observatory, on 2005 September 14 for a net exposure of 22 ksec. The source was in a declining phase of a minor outburst,...
The X-ray properties of the magnetic Cataclysmic Variable UU Col (2006)
De Martino, D., Matt, G., Mukai, K., Burwitz, V., Gaensicke, B. T., ...
XMM-Newton observations aimed at determining for the first time the broad-band X-ray properties of the faint high galactic latitude Intermediate Polar UU Col are presented. We performed X-ray timing...
Incommensurate magnetic order in Ag$_{2}$NiO$_{2}$ (2006)
Sugiyama, J., Ikedo, Y., Mukai, K., Brewer, J. H., Ansaldo, E. J., Morris, G. D., ...
The nature of the magnetic transition of the half-filled triangular antiferromagnet Ag$_{2}$NiO$_2$ with $T_{\rm N}$=56K was studied with positive muon-spin-rotation and relaxation ($\mu^+$SR)...
Evidence of Two Dimensionality in Quasi-One-Dimensional Cobalt Oxides (2006)
Sugiyama, J., Nozaki, H., Ikedo, Y., Mukai, K., Andreica, D., Amato, A., ...
The quasi-one-dimensional (Q1D) cobalt oxides A_{n+2}Co_{n+1}O{3n+3} (A = Ca, Sr, and Ba, n = 1-∞) were investigated by muon-spin spectroscopy under applied pressures of up to 1.1 GPa. The...
X-Ray Emitting Blast Wave from the Recurrent Nova RS Ophiuchi (2006)
Sokoloski, J. L., Luna, G. J. M., Mukai, K., Kenyon, Scott J.
Stellar explosions such as novae and supernovae produce most of the heavy elements in the Universe. Although the onset of novae from runaway thermonuclear fusion reactions on the surface of a white...
The X-ray properties of the magnetic Cataclysmic Variable UU Col (2006)
De Martino, D., Matt, G., Mukai, K., Burwitz, V., Gaensicke, B. T., ...
XMM-Newton observations aimed at determining for the first time the broad-band X-ray properties of the faint high galactic latitude Intermediate Polar UU Col are presented. We performed X-ray timing...
The X-ray properties of the magnetic Cataclysmic Variable UU Col (2006)
De Martino, D., Matt, G., Mukai, K., Burwitz, V., Gaensicke, B. T., ...
XMM-Newton observations aimed at determining for the first time the broad-band X-ray properties of the faint high galactic latitude Intermediate Polar UU Col are presented. We performed X-ray timing...
The X-ray properties of the magnetic cataclysmic variable UU Columbae (2006)
De Martino, D., Matt, G., Mukai, K., Bonnet-Bidaud, J. M., Burwitz, V., Gänsicke, B. T., ...
Unveiling X-ray properties of new intermediate polars (2006)
De Martino, D., Matt, G., Mukai, K., Burwitz, V., Haberl, F., ...
SWIFT/BAT detections of hard X-ray sources: IV (2006)
Ajello, M., Greiner, J., Rau, A., Barthelmy, S., Kennea, J. A., Falcone, A., ...
Swift observations of Swift J0911.2+4533 (2006)
Grupe, D., Tueller, J., Markwardt, C., Kennea, J. A., Falcone, A., Mushotzky, R., ...
Static magnetic order in metallic K$_{0.49}$CoO$_{2}$ (2005)
Sugiyama, J., Nozaki, H., Ikedo, Y., Mukai, K., Brewer, J. H., Ansaldo, E. J., ...
By means of muon spin spectroscopy, we have found that K$_{0.49}$CoO$_2$ crystals undergo successive magnetic transitions from a high-T paramagnetic state to a magnetic ordered state below 60 K and...
The X-ray Properties of M101 ULX-1 = CXOKM101 J140332.74+542102 (2005)
Mukai, K., Still, M., Corbet, R. H. D., Kuntz, K. D., Barnard, R.
We report our analysis of X-ray data on M101 ULX-1, concentrating on high state Chandra and XMM-Newton observations. We find that the high state of M101 ULX-1 may have a preferred recurrence...
Yamashita, Y., Yamamoto, S., Mukai, K., Yoshinobu, J., Harada, Y., Tokushima, T., ...
Atom specific valence electronic structures at interface are elucidated successfully using soft x-ray absorption and emission spectroscopy. In order to demonstrate the versatility of this method, we...
X-ray Orbital Modulations in Intermediate Polars (2005)
Parker, T. L., Norton, A. J., Mukai, K.
We present an analysis of 30 archival ASCA and RXTE X-ray observations of 16 intermediate polars to investigate the nature of their orbital modulation. We show that X-ray orbital modulation is...
X-ray Confirmation of the Intermediate Polar HT Cam (2005)
De Martino, D., Matt, G., Mukai, K., Gaensicke, B. T., Perez, J. M. Gonzalez, ...
We report on the first pointed X-ray observations with XMM-Newton and RXTE satellites of the X-ray source RXJ0757.0+6306=HT Cam. We detect a strong 515s X-ray modulation confirming the optical...
Simultaneous X-ray and Optical Observations of EX Hydrae (2005)
Belle, K. E., Howell, S. B., Mukai, K., Szkody, P., Nishikida, K., Ciardi, D. R., ...
The intermediate polar, EX Hydrae, was the object of a large simultaneous multiwavelength observational campaign during 2000 May - June. Here we present the Rossi X-ray Timing Explorer photometry and...
X-ray confirmation of the intermediate polar HT Cam (2005)
De Martino, D., Matt, G., Mukai, K., Gaensicke, B.T., Gonzalez Perez, J.M., ...
We report on the first pointed X-ray observations with XMM-Newton and RXTE satellites of the X-ray source RXJ0757.0+6306=HT Cam. We detect a strong 515s X-ray modulation confirming the optical...
X-ray confirmation of the intermediate polar HT Cam (2005)
De Martino, D., Matt, G., Mukai, K., Gaensicke, B.T., Gonzalez Perez, J.M., ...
We report on the first pointed X-ray observations with XMM-Newton and RXTE satellites of the X-ray source RXJ0757.0+6306=HT Cam. We detect a strong 515s X-ray modulation confirming the optical...
X-ray orbital modulations in intermediate polars (2005)
Parker, T.L., Norton, A.J., Mukai, K.
We present an analysis of 30 archival ASCA and RXTE X-ray observations of 16 intermediate polars to investigate the nature of their orbital modulation. We show that X-ray orbital modulation is...
X-ray confirmation of the intermediate polar HT Cam (2005)
De Martino, D., Matt, G., Mukai, K., Gänsicke, B. T., Gonzalez Perez, J. M., ...
XMM-Newton confirmation of the intermediate polar HT cam (2005)
De Martino, D., Matt, G., Mukai, K., Bonnet-Bidaud, J.M., Gänsicke, B.T., Haberl, F., ...
X-ray Observations of the Bright Old Nova V603 Aquilae (2004)
We report on our Chandra and RXTE observations of the bright old nova, V603 Aql, performed in 2001 April, supplemented by our analysis of archival X-ray data on this object. We find that the RXTE...
Recent Advances in X-ray Observations of Cataclysmic Variables (2004)
A personal selection of noteworthy X-ray results on CVs are presented, with emphasis on XMM-Newton and Chandra observations. Progressing roughly from broad-band view to narrow-band, high spectral...
Hakala, P., Ramsay, G., Muhli, P., Charles, P., Hannikainen, D., Mukai, K., ...
UW CrB (MS1603+2600) is a peculiar short period X-ray binary that exhibits extraordinary optical behaviour. The optical light curve shape of the system changes drastically from night to night,...
Pratt, G. W., Mukai, K., Hassall, B. J. M., Naylor, T., Wood, J. H.
In the optical and ultraviolet regions of the electromagnetic spectrum, UX Ursae Majoris is a deeply eclipsing cataclysmic variable. However, no soft X-ray eclipse was detected in ROSAT observations....
The X-ray emission of intermediate polars: the BeppoSAX view and the role of current missions (2004)
De Martino, D., Matt, G., Belloni, T., Chiappetti, L., Haberl, F., Mukai, K.
BeppoSAX observations of soft X-ray intermediate polars (2004)
De Martino, D., Matt, G., Belloni, T., Haberl, F., Mukai, K.
BeppoSAX observations of soft X-ray Intermediate Polars (2003)
De Martino, D., Matt, G., Belloni, T., Haberl, F., Mukai, K.
We present broad-band (0.1--90keV) spectral and temporal properties of the three Intermediate Polars, RE0751+144 (PQ Gem), RXJ0558.0+5353 (V405Aur) and RXJ1712.6-2414 (V2400 Oph) based on...
Starrfield, S., Burwitz, V., Hauschildt, P., Wichmann, R., Drake, J. J., ...
V4743 Sgr (Nova Sgr 2002 No. 3) was discovered on 20 September 2002. We obtained a 5ks ACIS-S spectrum in November 2002 and found that the nova was faint in X-rays. We then obtained a 25ks CHANDRA...
Mukai, K., Hellier, C., Madejski, G., Patteson, J., Skillman, D. R.
V1432 Aquilae (=RX J1940.2-1025) is the X-ray bright, eclipsing magnetic cataclysmic variable ~37' away from the Seyfert galaxy, NGC 6814. Due to a 0.3% difference between the orbital (12116.3 s) and...
The Origin of Soft X-rays in DQ Herculis (2003)
Mukai, K., Still, M., Ringwald, F. A.
DQ Herculis (Nova Herculis 1934) is a deeply eclipsing cataclysmic variable containing a magnetic white dwarf primary. The accretion disk is thought to block our line of sight to the white dwarf at...
The surprising Far-UV spectrum of the polar BY Camelopardalis (2003)
Mouchet, M., Bonnet-Bidaud, J. M., Roueff, E., Beuermann, K., De Martino, D., Desert, J. M., ...
We report on the first far-UV observations of the asynchronous polar BY Cam made by the Far-Ultraviolet Spectroscopic Explorer (FUSE). The source is known to exhibit the most extreme NV/CIV emission...
Two Types of X-ray Spectra in Cataclysmic Variables (2003)
Mukai, K., Kinkhabwala, A., Peterson, J. R., Kahn, S. M., Paerels, F.
We present Chandra HETG spectra of seven cataclysmic variables. We find that they divide unambiguously into two distinct types. Spectra of the first type are remarkably well fit by a simple cooling...
The surprising Far-UV spectrum of the polar BY Camelopardalis (2003)
Mouchet, M., Roueff, E., Beuermann, K., De Martino, D., Desert, J. M., ...
Mukai, K, Jinno, S, Shimobe, Y, Azuma, N, Taniguchi, M, Misaki, Y, ...
Drake, Jeremy J., Wagner, R. Mark, Starrfield, Sumner, Butt, Yousaf, Krautter, Joachim, Bond, H. E., ...
V1494 Aql (Nova Aql 1999 No. 2) was discovered on 2 December 1999. We obtained Chandra ACIS-I spectra on 15 April and 7 June 2000 which appear to show only emission lines. Our third observation, on 6...
Chandra Observation of Luminous and Ultraluminous X-ray Binaries in M101 (2002)
Mukai, K., Pence, W. D., Snowden, S. L., Kuntz, K. D.
X-ray binaries in the Milky Way are among the brightest objects on the X-ray sky. With the increasing sensitivity of recent missions, it is now possible to study X-ray binaries in nearby galaxies. We...
Pulsations and orbital modulation of the intermediate polar 1WGA J1958.2+3232 (2002)
Norton, A.J., Quaintrell, H., Katajainen, S., Lehto, H.J., Mukai, K., Negueruela, I.
We present optical photometry, spectroscopy and photopolarimetry, as well as ASCA X-ray observations, of the recently discovered intermediate polar 1WGA J1958.2+3232. Through the first detection of...
Pulsations and orbital modulation of the intermediate polar 1WGA J1958.2+3232 (2002)
Norton, A. J., Quaintrell, H., Katajainen, S., Lehto, H. J., Mukai, K., Negueruela, I.
We present optical photometry, spectroscopy and photopolarimetry, as well as ASCA X-ray observations, of the recently discovered intermediate polar 1WGA J1958.2+3232. Through the first detection of...
The X-ray emission of the intermediate polar V709 Cas (2002)
De Martino, D., Matt, G., Mukai, K., Belloni, T., Bonnet-Bidaud, J. M., Chiappetti, L., ...
Mukai, K, Hatanaka, T, Senba, N, Nakayashiki, T, Misaki, Y, Tanaka, K, ...
Understanding the LMXB X2127+119 in M15 I. X-ray eclipses and dips (2001)
Ioannou, Zach, Naylor, T., Smale, A. P., Charles, P. A., Mukai, K.
We present X-ray observations of the high-inclination low-mass X-ray binary system X2127+119 (AC211) in the globular cluster M15 (NGC 7078). The observations consist of data acquired in 1996 with the...
The X-ray emission of the Intermediate Polar V709 Cas (2001)
De Martino, D., Matt, G., Mukai, K., Belloni, T., Bonnet-Bidaud, J. M., Chiappetti, L., ...
We present RXTE and BeppoSAX observations of the Intermediate Polar V709 Cas acquired in 1997 and 1998 respectively. The X-ray emission from 0.1 to 30keV is dominated by the strong pulsation at the...
Chandra X-ray Sources in M101 (2001)
Pence, W. D., Snowden, S. L., Mukai, K., Kuntz, K. D.
A deep (98.2 ks) Chandra Cycle-1 observation has revealed a wealth of discrete X-ray sources as well as diffuse emission in the nearby face-on spiral galaxy M101. From this rich dataset we have...