Hard X-ray emission from Serpens X-1 as observed by INTEGRAL

Details Hard X-ray emission from Serpens X-1 as observed by INTEGRAL Hard X-ray emission from Serpens X-1 as observed by INTEGRAL

2004-03-21

arxiv.org/abs/astro-ph/0403505v2

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures. Presented at 5th INTEGRAL Workshop "The INTEGRAL Universe", Munich, Germany, 16-20 Feb 2004. To be publish

Scientific paper

We here report results of an INTEGRAL observation of the X-ray burst and atoll source Ser X-1 performed on May 2003. The object was observed for a total of 400 ks but nearly 8 degrees off-axis due to the amalgamation with an observation of SS 433, the pointing target source. Ser X-1 was detected up to 30 keV with unprecedented positional accuracy for a high-energy emission; a sharp spectral drop is evident beyond this energy. Significant variability is seen in the 20-30 keV light curve. 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) broadband radio-to-gamma-rays broad-band spectral energy distribution for Ser X-1 is also presented for the first time.

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