Zobrazeno 1 - 10
of 73
pro vyhledávání: '"Patel, Sandeep K."'
Autor:
Dahle, Hakon, Sarazin, Craig L., Lopez, Laura A., Kouveliotou, Chryssa, Patel, Sandeep K., Rol, Evert, van der Horst, Alexander J., Fynbo, Johan P., Wijers, Ralph A. M. J., Burrows, David N., Gehrels, Neil, Grupe, Dirk, Ramirez-Ruiz, Enrico, Michalowski, Michal J.
We have identified a merging galaxy cluster with evidence of two distinct sub-clusters. The X-ray and optical data suggest that the subclusters are moving away from each other after closest approach. This cluster merger was discovered from observatio
Externí odkaz:
http://arxiv.org/abs/1305.4660
4U 2206+54 is a high mass X-ray binary which has been suspected to contain a neutron star accreting from the wind of its companion BD +53 2790. Reig et al. have recently detected 5560 s period pulsations in both RXTE and INTEGRAL observations which t
Externí odkaz:
http://arxiv.org/abs/0908.4042
Autor:
Rol, Evert, van der Horst, Alexander, Wiersema, Klaas, Patel, Sandeep K., Levan, Andrew, Nysewander, Melissa, Kouveliotou, Chryssa, Wijers, Ralph A. M. J., Tanvir, Nial, Reichart, Dan, Fruchter, Andrew S., Graham, John, Ovaldsen, Jan-Erik, Jaunsen, Andreas O., Jonker, Peter, van Ham, Wilbert, Hjorth, Jens, Starling, Rhaana L. C., O'Brien, Paul T., Fynbo, Johan, Burrows, David N., Strom, Richard
Publikováno v:
Astrophys.J. 669 (2007) 1098-1106
GRB051022 was undetected to deep limits in early optical observations, but precise astrometry from radio and X-ray showed that it most likely originated in a galaxy at z~0.8. We report radio, optical, near infra-red and X-ray observations of GRB05102
Externí odkaz:
http://arxiv.org/abs/0706.1518
Autor:
Burrows, David N., Grupe, Dirk, Capalbi, Milvia, Panaitescu, Alin, Patel, Sandeep K., Kouveliotou, Chryssa, Zhang, Bing, Meszaros, Peter, Chincarini, Guido, Gehrels, N., Wijers, Ralph A. M.
Publikováno v:
Astrophys.J.653:468-473,2006
We report the best evidence to date of a jet break in a short Gamma-Ray Burst (GRB) afterglow, using Chandra and Swift XRT observations of the X-ray afterglow of GRB 051221A. The combined X-ray light curve, which has three breaks, is similar to those
Externí odkaz:
http://arxiv.org/abs/astro-ph/0604320
Autor:
Woods, Peter M., Kouveliotou, Chryssa, Finger, Mark H., Gogus, Ersin, Wilson, Colleen A., Patel, Sandeep K., Hurley, Kevin, Swank, Jean H.
Publikováno v:
Astrophys.J.654:470-486,2006
On 2004 December 27, a highly-energetic giant flare was recorded from the magnetar candidate SGR 1806-20. In the months preceding this flare, the persistent X-ray emission from this object began to undergo significant changes. Here, we report on the
Externí odkaz:
http://arxiv.org/abs/astro-ph/0602402
Autor:
Weisskopf, Martin C., Aldcroft, Thomas L., Cameron, Robert A., Gandhi, Poshak, Foellmi, Cédric, Elsner, Ronald F., Patel, Sandeep K., Wu, Kinwah, O'Dell, Stephen L.
Publikováno v:
Astrophys.J.637:682-692,2006
Before the official first-light images, the Chandra X-Ray Observatory obtained an X-ray image of the field to which its focal plane was first exposed. We describe this historic observation and report our study of the first Chandra field. Chandra's Ad
Externí odkaz:
http://arxiv.org/abs/astro-ph/0509053
Autor:
Gogus, Ersin, Finger, Mark H., Kouveliotou, Chryssa, Woods, Peter M., Patel, Sandeep K., Rupen, Michael, Swank, Jean H., Markwardt, Craig B., van der Klis, Michiel
We present the long term X-ray light curves, detailed spectral and timing analyses of XTE J1908+094 using the Rossi X-ray Timing Explorer Proportional Counter Array observations covering two outbursts in 2002 and early 2003. At the onset of the first
Externí odkaz:
http://arxiv.org/abs/astro-ph/0403523
Autor:
Donahue, Megan, Gaskin, Jessica A., Patel, Sandeep K., Joy, Marshall, Clowe, Doug, Hughes, John P.
Publikováno v:
Astrophys.J.598:190-209,2003
We present new Chandra X-ray observations of the luminous X-ray cluster, MS0451.6-0305, at z=0.5386. Spectral imaging data for the cluster are consistent with an isothermal cluster of 10.0 - 10.6 +/-1.6 keV and an Fe abundance of 0.32-0.40 +/-0.13 so
Externí odkaz:
http://arxiv.org/abs/astro-ph/0308024
Autor:
Wilson, Colleen. A., Patel, Sandeep K., Kouveliotou, Chryssa, Jonker, Peter G., van der Klis, Michiel, Lewin, Walter H. G, Belloni, Tomaso, Mendez, Mariano
Publikováno v:
Astrophys.J.596:1220-1228,2003
There exists a group of persistently faint galactic X-ray sources that, based on their location in the galaxy, high L_x/L_opt, association with X-ray bursts, and absence of low frequency X-ray pulsations, are thought to be low-mass X-ray binaries (LM
Externí odkaz:
http://arxiv.org/abs/astro-ph/0307045
Autor:
Patel, Sandeep K., Kouveliotou, Chryssa, Woods, Peter M., Tennant, Allyn F., Weisskopf, Martin C., Finger, Mark H., Wilson-Hodge, Colleen, Gogus, Ersin, van der Klis, Michiel, Belloni, Tomaso
Publikováno v:
Astrophys.J. 587 (2003) 367-372
We present X-ray imaging, timing, and phase resolved spectroscopy of the anomalous X-ray pulsar 4U 0142+61 using the Chandra X-ray Observatory. The spectrum is well described by a power law plus blackbody model with power law index = 3.35(2), kT_BB=0
Externí odkaz:
http://arxiv.org/abs/astro-ph/0212412