Zobrazeno 1 - 10
of 253
pro vyhledávání: '"LEWIN, W. H. G."'
We present an analysis of 15 Chandra observations of the nearby spiral galaxy M81 taken over the course of six weeks in May--July 2005. Each observation reaches a sensitivity of ~10^37 erg/s. With these observations and one previous deeper Chandra ob
Externí odkaz:
http://arxiv.org/abs/1104.2906
Autor:
Margon, Bruce, Beck-Winchatz, B., Homer, L., Pooley, D., Bassa, C. G., Anderson, S. F., Lewin, W. H. G., Verbunt, F., Kong, A. K. H., Plotkin, R. M.
Highly sensitive and precise X-ray imaging from Chandra, combined with the superb spatial resolution of HST optical images, dramatically enhances our empirical understanding of compact binaries such as cataclysmic variables and low mass X-ray binarie
Externí odkaz:
http://arxiv.org/abs/1011.1005
Autor:
Degenaar, N., Wolff, M. T., Ray, P. S., Wood, K. S., Homan, J., Lewin, W. H. G., Jonker, P. G., Cackett, E. M., Miller, J. M., Brown, E. F., Wijnands, R.
In late 2008, the quasi-persistent neutron star X-ray transient and eclipsing binary EXO 0748-676 started a transition from outburst to quiescence, after it had been actively accreting for more than 24 years. In a previous work, we discussed Chandra
Externí odkaz:
http://arxiv.org/abs/1007.0247
Autor:
Kong, A. K. H., Heinke, C. O., Di Stefano, R., Cohn, H. N., Lugger, P. M., Barmby, P., Lewin, W. H. G., Primini, F. A.
We report the most accurate X-ray position of the X-ray source in the giant globular cluster G1 in M31 by using the Chandra X-ray Observatory, Hubble Space Telescope (HST), and Canada-France-Hawaii Telescope (CFHT). G1 is clearly detected with Chandr
Externí odkaz:
http://arxiv.org/abs/0910.3944
Autor:
Jonker, P. G., Miller-Jones, J., Homan, J., Gallo, E., Rupen, M., Tomsick, J., Fender, R. P., Kaaret, P., Steeghs, D. T. H., Torres, M. A. P., Wijnands, R., Markoff, S., Lewin, W. H. G.
In this Paper we report on radio (VLA and ATCA) and X-ray (RXTE, Chandra and Swift) observations of the outburst decay of the transient black hole candidate H1743-322 in early 2008. We find that the X-ray light curve followed an exponential decay, le
Externí odkaz:
http://arxiv.org/abs/0909.2632
Autor:
Degenaar, N., Wijnands, R., Wolff, M. T., Ray, P. S., Wood, K. S., Homan, J., Lewin, W. H. G., Jonker, P. G., Cackett, E. M., Miller, J. M., Brown, E. F.
The quasi-persistent neutron star X-ray transient and eclipsing binary EXO 0748-676 recently started the transition to quiescence following an accretion outburst that lasted more than 24 years. We report on two Chandra and twelve Swift observations p
Externí odkaz:
http://arxiv.org/abs/0811.4582
Autor:
Del Santo, M., Belloni, T. M., Homan, J., Bazzano, A., Casella, P., Fender, R. P., Gallo, E., Gehrels, N., Lewin, W. H. G., Mendez, M., van der Klis, M.
We report on X-ray and soft gamma-ray observations of the black-hole candidate GX 339-4 during its 2007 outburst, performed with the RXTE and INTEGRAL satellites. The hardness-intensity diagram of all RXTE/PCA data combined shows a q-shaped track sim
Externí odkaz:
http://arxiv.org/abs/0810.3556
Autor:
Cackett, E. M., Miller, J. M., Homan, J., van der Klis, M., Lewin, W. H. G., Mendez, M., Raymond, J., Steeghs, D., Wijnands, R.
Publikováno v:
Astrophys.J.690:1847-1855,2009
While iron emission lines are well studied in black hole systems, both in X-ray binaries and Active Galactic Nuclei, there has been less of a focus on these lines in neutron star low-mass X-ray binaries (LMXBs). However, recent observations with Suza
Externí odkaz:
http://arxiv.org/abs/0809.3171
We present Chandra X-ray Observatory ACIS-S3 X-ray imaging observations and VLT/FORS2 and Hubble Space Telescope optical observations of two low-density Galactic globular clusters; NGC 6366 and M55. We detect 16 X-ray sources with 0.5-6.0 keV luminos
Externí odkaz:
http://arxiv.org/abs/0807.0411
We have studied the rapid X-ray time variability in 149 pointed observations with the \textit{Rossi X-ray Timing Explorer} (RXTE)'s Proportional Counter Array of the atoll source 4U~1636--53 in the banana state and, for the first time with RXTE, in t
Externí odkaz:
http://arxiv.org/abs/0806.0962