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

N. Masetti; L. Foschini; E. Palazzi; L. Amati; E. Caroli; G. Di Cocco; F. Frontera; M. Orlandini

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

N. Masetti·L. Foschini·E. Palazzi·L. Amati·E. Caroli·G. Di Cocco·F. Frontera·M. Orlandini

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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.

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N. Masetti, L. Foschini, E. Palazzi, L. Amati, E. Caroli, G. Di Cocco, F. Frontera, M. Orlandini. 2004-05-14. Hard X-ray emission from Serpens X-1 as observed by INTEGRAL. https://arxiv.org/abs/astro-ph/0403505

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