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http://hdl.handle.net/20.500.12386/23471
Titolo: | Spectral and timing characterization of the X-ray source 1RXS J194211.9+255552 | Autori: | D'AI', ANTONINO CUSUMANO, GIANCARLO LA PAROLA, VALENTINA SEGRETO, ALBERTO |
Data pubblicazione: | 2015 | Rivista: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Numero: | 451 | Fascicolo: | 3 | Da pagina:: | 2835 | Abstract: | We report on the first spectral and timing characterization of the transient X-ray source 1RXS J194211.9+255552 using all available data from the Swift X-ray satellite. We used 10 years of hard X-ray data from the Burst Alert Telescope (BAT) to characterize its long-term behaviour and to search for long periodicities, finding evidence for a periodic modulation at 166.5 ± 0.5 d, that we interpret as the orbital period of the source. The folded light curve reveals that the X-ray emission is mostly concentrated in a restricted phase-interval and we propose to associate 1RXS J194211.9+255552 to the class of the Be X-ray binaries. This is also supported by the results of the spectral analysis, where we used the BAT data and three pointed Swift/XRT observations to characterize the X-ray broad-band spectral shape. We found mild spectral variability in soft X-rays that can be accounted for by a varying local neutral absorber, while the intrinsic emission is consistent with a hard power law multiplied by a high-energy exponential cut-off as typically observed in this class of systems. | Acknowledgments: | This research has made use of data and/or software provided by the High Energy Astrophysics Science Archive Research Center (HEASARC), which is a service of the Astrophysics Science Division at NASA/GSFC and the High Energy Astrophysics Division of the Smithsonian Astrophysical Observatory. This work has been supported by ASI grant I/011/07/0. | URI: | http://hdl.handle.net/20.500.12386/23471 | URL: | https://academic.oup.com/mnras/article/451/3/2835/1188138 http://arxiv.org/abs/1601.03246v1 |
ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stv1118 | Bibcode ADS: | 2015MNRAS.451.2835D | Fulltext: | open |
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