Hard X-ray emission from Serpens X-1 as observed by INTEGRAL
Abstract
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.
Cite
@article{arxiv.astro-ph/0403505,
title = {Hard X-ray emission from Serpens X-1 as observed by INTEGRAL},
author = {N. Masetti and L. Foschini and E. Palazzi and L. Amati and E. Caroli and G. Di Cocco and F. Frontera and M. Orlandini},
journal= {arXiv preprint arXiv:astro-ph/0403505},
year = {2007}
}
Comments
4 pages, 3 figures. Presented at 5th INTEGRAL Workshop "The INTEGRAL Universe", Munich, Germany, 16-20 Feb 2004. To be published in the Workshop proceedings by EDP. Corrected following referee's comments; references added