Zobrazeno 1 - 10
of 190
pro vyhledávání: '"Ross, R R"'
Autor:
Walton, D. J., Risaliti, G., Harrison, F. A., Fabian, A. C., Miller, J. M., Arevalo, P., Ballantyne, D. R., Boggs, S. E., Brenneman, L. W., Christensen, F. E., Craig, W. W., Elvis, M., Fuerst, F., Gandhi, P., Grefenstette, B. W., Hailey, C. J., Kara, E., Luo, B., Madsen, K. K., Marinucci, A., Matt, G., Parker, M. L., Reynolds, C. S., Rivers, E., Ross, R. R., Stern, D., Zhang, W. W.
We present a spectral analysis of four coordinated NuSTAR+XMM-Newton observations of the Seyfert galaxy NGC 1365. These exhibit an extreme level of spectral variability, which is primarily due to variable line-of-sight absorption, revealing relativel
Externí odkaz:
http://arxiv.org/abs/1404.5620
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
Autor:
Fabian, A. C., Wilkins, D. R., Miller, J. M., Reis, R. C., Reynolds, C. S., Cackett, E. M., Nowak, M. A., Pooley, G. G., Pottschmidt, K., Sanders, J. S., Ross, R. R., Wilms, J.
The spin of Cygnus X-1 is measured by fitting reflection models to Suzaku data covering the energy band 0.9-400 keV. The inner radius of the accretion disc is found to lie within 2 gravitational radii (r_g=GM/c^2) and a value for the dimensionless bl
Externí odkaz:
http://arxiv.org/abs/1204.5854
Autor:
Ponti, G., Gallo, L. C., Fabian, A. C., Miniutti, G., Zoghbi, A., Uttley, P., Ross, R. R., Vasudevan, R. V., Tanaka, Y., Brandt, W. N.
We present a spectral variability study of the XMM-Newton and Suzaku observations of one of the most extreme Narrow Line Seyfert 1 galaxies, IRAS13224-3809. The X-ray spectrum is characterized by two main peculiar features, i) a strong soft excess wi
Externí odkaz:
http://arxiv.org/abs/0911.1003
Autor:
Fabian, A. C., Zoghbi, A., Ross, R. R., Uttley, P., Gallo, L. C., Brandt, W. N., Blustin, A., Boller, T., Caballero-Garcia, M. D., Larsson, J., Miller, J. M., Miniutti, G., Ponti, G., Reis, R. C., Reynolds, C. S., Tanaka, Y., Young, A. J.
Since the discovery of the first broad iron-K line in 1995 from the Seyfert Galaxy MCG--6-30-15, broad iron-K lines have been found in several other Seyfert galaxies, from accreting stellar mass black holes and even from accreting neutron stars. The
Externí odkaz:
http://arxiv.org/abs/0905.4383
We present measurements of the dimensionless spin parameters and inner-disk inclination of two stellar mass black holes. The spin parameter of SWIFT J1753.5-0127 and GRO J1655-40 are estimated by modelling the strong reflection signatures present in
Externí odkaz:
http://arxiv.org/abs/0902.1745
Autor:
Ross, R. R., Fabian, A. C.
The X-ray spectra of accreting stellar-mass black hole systems exhibit spectral features due to reflection, especially broad iron K alpha emission lines. We investigate the reflection by the accretion disc that can be expected in the high/soft state
Externí odkaz:
http://arxiv.org/abs/0709.0270
Publikováno v:
Mon.Not.Roy.Astron.Soc.376:348-352,2007
We present a study of the spectral variability of the Seyfert I galaxy MCG-6-30-15 based on the two long XMM-Newton observations from 2000 and 2001. The X-ray spectrum and variability properties of the 2001 data have previously been well described wi
Externí odkaz:
http://arxiv.org/abs/astro-ph/0701567
Publikováno v:
Mon.Not.Roy.Astron.Soc.370:1699-1712,2006
We discuss the expected X-ray spectral and variability properties of black hole accretion discs at high luminosity, under the hypothesis that radiation pressure dominated discs are subject to violent clumping instabilities and, as a result, have a hi
Externí odkaz:
http://arxiv.org/abs/astro-ph/0606262
Publikováno v:
Mon.Not.Roy.Astron.Soc.371:263-282,2006
We report results from an XMM-Newton observation of the broad-line radio galaxy 3C109 (z=0.3056). Confirming previous results, an Fe emission line is detected, possibly comprising a broad component. However, the data cannot distinguish between an unt
Externí odkaz:
http://arxiv.org/abs/astro-ph/0605747