Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-05-14
Astron.Astrophys. 423 (2004) 651-656
Astronomy and Astrophysics
Astrophysics
6 pages, 3 figures, 1 table; accepted for publication on Astronomy & Astrophysics, main journal. Final version of the paper in
Scientific paper
10.1051/0004-6361:20040210
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.
Amati Lorenzo
Beckmann Volker
Brandt Steven
Caroli Ezio
Cocco G. Di
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