Serpens X-1 observed by INTEGRAL

Abstract

Here we report results of an INTEGRAL-AO1 observation of the X-ray burst and atoll source Ser X-1 performed in May 2003. The object was observed for a total on-source time of 400 ks but nearly 8 degrees off-axis due to its amalgamation with an observation of SS 433, the pointing target source. Ser X-1 has been clearly detected up to 30 keV with unprecedented positional accuracy for high-energy emission. The 20-30 keV light curve showed substantial variability during the observation. Comparison with previous observations indicates that the source was in its high (`banana') state and displayed a soft spectrum during the INTEGRAL pointing. A (non simultaneous) radio-to-gamma-rays broad-band spectral energy distribution is also presented for the first time and discussed.

6 pages, 3 figures, 1 table; accepted for publication on Astronomy & Astrophysics, main journal. Final version of the paper including the A&A Language Editor's comments

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• INTEGRAL observations of SS433, a supercritically accreting microquasar with hard spectrum
• New Results for Two Optically Faint Low Mass X-Ray Binary Systems
• Spectroscopy of the Optical Counterpart to Ser X-1
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Cited by in corpus (5)

• Unveiling the nature of three INTEGRAL sources through optical spectroscopy
• The Galactic LMXB Population and the Galactic Centre Region
• A test of the nature of the Fe K Line in the neutron star low-mass X-ray binary Serpens X-1
• Sample of optically unidentified X-ray binaries in the Galactic bulge. Constraints on the physical nature from infrared photometric surveys
• Unveiling the nature of INTEGRAL sources through optical spectroscopy