Zobrazeno 1 - 10
of 149
pro vyhledávání: '"Reis, R. C."'
Recent work has demonstrated the potential of gravitationally lensed quasars to extend measurements of black hole spin out to high-redshift with the current generation of X-ray observatories. Here we present an analysis of a large sample of 27 lensed
Externí odkaz:
http://arxiv.org/abs/1503.05255
Multi-Wavelength Coverage of State Transitions in the New Black Hole X-Ray Binary Swift J1910.2-0546
Autor:
Degenaar, N., Maitra, D., Cackett, E. M., Reynolds, M. T., Miller, J. M., Reis, R. C., King, A. L., Gultekin, K., Bailyn, C. D., Buxton, M. M., MacDonald, R. K. D., Fabian, A. C., Fox, D. B., Rykoff, E. S.
Understanding how black holes accrete and supply feedback to their environment is one of the outstanding challenges of modern astrophysics. Swift J1910.2-0546 is a candidate black hole low-mass X-ray binary that was discovered in 2012 when it entered
Externí odkaz:
http://arxiv.org/abs/1403.0939
Autor:
Walton, D. J., Zoghbi, A., Cackett, E. M., Uttley, P., Harrison, F. A., Fabian, A. C., Kara, E., Miller, J. M., Reis, R. C., Reynolds, C. S.
We present an X-ray spectral and temporal analysis of the variable active galaxy NGC 6814, observed with Suzaku during November 2011. Remarkably, the X-ray spectrum shows no evidence for the soft excess commonly observed amongst other active galaxies
Externí odkaz:
http://arxiv.org/abs/1310.0822
Autor:
Reis, R. C., Reynolds, M. T., Miller, J. M., Walton, D. J., Maitra, D., King, A., Degenaar, N.
We present the first results from a long (51 ks) XMM-Newton observation of the Galactic X-ray binary Swift J1910.2-0546 in a intermediate state, obtained during its 2012 outburst. A clear, asymmetric iron emission line is observed and physically moti
Externí odkaz:
http://arxiv.org/abs/1310.0417
Autor:
Miller, J. M., Walton, D. J., King, A. L., Reynolds, M. T., Fabian, A. C., Miller, M. C., Reis, R. C.
Soft, potentially thermal spectral components observed in some ULXs can be fit with models for emission from cool, optically-thick accretion disks. If that description is correct, the low temperatures that are observed imply accretion onto "intermedi
Externí odkaz:
http://arxiv.org/abs/1309.4350
Autor:
Walton, D. J., Miller, J. M., Harrison, F. A., Fabian, A. C., Roberts, T. P., Middleton, M. J., Reis, R. C.
Studies of X-ray continuum emission and flux variability have not conclusively revealed the nature of ultra-luminous X-ray sources (ULXs) at the high-luminosity end of the distribution (those with Lx > 1e40 erg/s). These are of particular interest be
Externí odkaz:
http://arxiv.org/abs/1306.2317
Autor:
Reis, R. C., Miller, J. M.
The observation of energetic X-ray emission from black holes, inconsistent with thermal emission from an accretion disk, has long indicated the presence of a "corona" around these objects. However, our knowledge of the geometry, composition, and proc
Externí odkaz:
http://arxiv.org/abs/1304.4947
By studying Swift X-ray spectra of an optically-selected, non-magnetic sample of nearby cataclysmic variables (CVs), we show that there is a population with X-ray luminosity much lower than accounted for in existing studies. We find an average 0.5-10
Externí odkaz:
http://arxiv.org/abs/1301.1213
We present a X-ray spectral analysis of a large sample of 25 'bare' active galactic nuclei, sources with little or no complicating intrinsic absorption, observed with Suzaku. Our work focuses on studying the potential contribution from relativistic d
Externí odkaz:
http://arxiv.org/abs/1210.4593
Autor:
Fabian, A. C., Kara, E., Walton, D. J., Wilkins, D. R., Ross, R. R., Lozanov, K., Uttley, P., Gallo, L. C., Zoghbi, A., Miniutti, G., Boller, T., Brandt, W. N., Cackett, E. M., Chiang, C. -Y., Dwelly, T., Malzac, J., Miller, J. M., Nardini, E., Ponti, G., Reis, R. C., Reynolds, C. S., Steiner, J., Tanaka, Y., Young, A. J.
Results are presented from a 500ks long XMM-Newton observation of the Narrow-Line Seyfert 1 galaxy IRAS13224-3809. The source is rapidly variable on timescales down to a few 100s. The spectrum shows strong broad Fe-K and L emission features which are
Externí odkaz:
http://arxiv.org/abs/1208.5898