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The XMM-Newton/Chandra monitoring campaign on the Galactic center region: Description of the program and preliminary results | | R. Wijnands
; J.J.M. in ’t Zand
; M. Rupen
; T. Maccarone
; J. Homan
; R. Cornelisse
; R. Fender
; J. Grindlay
; M. van der Klis
; E. Kuulkers
; C.B. Markwardt
; J.C.A. Miller-Jones
; Q.D. Wang
; | | Date: |
30 Aug 2005 | | Subject: | astro-ph | | Abstract: | We present the first results of our X-ray monitoring campaign on a 1.7 square degree region centered on Sgr A* using the X-ray satellites XMM-Newton and Chandra. The purpose of this campaign is to monitor the X-ray behavior (below 10 keV) of X-ray sources (both persistent and transient) which are too faint to be detected by monitoring instruments aboard satellites currently in orbit (e.g., Rossi X-ray Timing Explorer; INTEGRAL). Our first monitoring observations (using the HRC-I aboard Chandra) were obtained on June 5, 2005. Most of the sources detected could be identified with foreground sources, such as X-ray active stars. In addition we detected two persistent X-ray binaries (1E 1743.1-2843; 1A 1742-294), two faint X-ray transients (GRS 1741.9-2843; XMM J174457-2850.3), as well as a possible new transient source at a luminosity of a few times 1E34 erg/s. We report on the X-ray results on these systems and on the non detection of the transients in follow-up radio data using the Very Large Array. We discuss how our monitoring campaign can help to improve our understanding of the different types of X-ray transients (i.e., the very faint ones). | | Source: | arXiv, astro-ph/0508648 | | Services: | Forum | Review | PDF | Favorites | |
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