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http://hdl.handle.net/20.500.12386/23113
Titolo: | A Swift view on IGR J19149+1036 | Autori: | CUSUMANO, GIANCARLO SEGRETO, ALBERTO LA PAROLA, VALENTINA MASETTI, NICOLA D'AI', ANTONINO TAGLIAFERRI, Gianpiero |
Data pubblicazione: | 2015 | Rivista: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Numero: | 446 | Fascicolo: | 1 | Da pagina:: | 1041 | Abstract: | IGR J19149+1036 is a high-mass X-ray binary detected by INTEGRAL in 2011 in the hard X-ray domain. We have analysed the Burst Alert Telescope (BAT) survey data of the first 103 months of the Swift mission detecting this source at a significance level of ̃30 standard deviations. The timing analysis on the long-term BAT light curve reveals the presence of a strong sinusoidal intensity modulation of 22.25 ± 0.05 d, that we interpret as the orbital period of this binary system. A broad-band (0.3-150 keV) spectral analysis was performed combining the BAT spectrum and the X-Ray Telescope (XRT) spectra from the pointed follow-up observations. The spectrum is adequately modelled with an absorbed power law with a high-energy cutoff at ̃24 keV and an absorption cyclotron feature at ̃31 keV. Correcting for the gravitational redshift, the inferred magnetic field at the neutron star surface is B<SUB>surf</SUB> ̃ 3.6 × 10<SUP>12</SUP> G. | Acknowledgments: | This work has been supported by ASI grant I/011/07/0. Facility : Swift. This research has made use of data obtained from the High Energy Astrophysics Science Archive Research Center (HEASARC) provided by NASA's Goddard Space Flight Center. | URI: | http://hdl.handle.net/20.500.12386/23113 | URL: | https://academic.oup.com/mnras/article/446/1/1041/2907959 | ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stu2141 | Bibcode ADS: | 2015MNRAS.446.1041C | Fulltext: | open |
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