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26 April 2024 |
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BeppoSAX serendipitous discovery of the X-ray pulsar SAX J1802.7-2017 | | G. Augello
; R. Iaria
; N. R. Robba
; T. Di Salvo
; L. Burderi
; G. Lavagetto
; L. Stella
; | | Date: |
9 Aug 2003 | | Journal: | Astrophys.J. 596 (2003) L63-L66 | | Subject: | astro-ph | | Abstract: | We report on the serendipitous discovery of a new X-ray source, SAX J1802.7-2017, ~22’ away from the bright X-ray source GX 9+1, during a BeppoSAX observation of the latter source on 2001 September 16-20. SAX J1802.7-2017 remained undetected in the first 50 ks of observation; the source count rate in the following ~300 ks ranged between 0.04 c/s and 0.28 c/s, corresponding to an averaged 0.1-10 keV flux of 3.6 10^{-11} ergs cm^{-2} s^{-1}. We performed a timing analysis and found that SAX J1802.7-2017 has a pulse period of 139.612 s, a projected semimajor axis of a_x sin i ~ 70 lt-s, an orbital period of ~4.6 days, and a mass function f(M) ~ 17 Msun. The new source is thus an accreting X-ray pulsar in a (possibly eclipsing) high mass X-ray binary. The source was not detected by previous X-ray astronomy satellites, indicating that it is likely a transient system. | | Source: | arXiv, astro-ph/0308157 | | Services: | Forum | Review | PDF | Favorites | |
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