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RXTE Observations of the X-ray Pulsar XTE J1855-026 - a Possible New Supergiant System | | R.H.D. Corbet
; F.E. Marshall
; A.G. Peele
; T. Takeshima
; | | Date: |
11 Dec 1998 | | Subject: | astro-ph | | Abstract: | A new X-ray source, XTE J1855-026, was discovered during RXTE scans along the galactic plane. The source shows pulsations at a period of 361 s and also modulation at a period of 6.1 days which we interpret as the orbital period of the system. The X-ray spectrum above ~3 keV can be fitted with an absorbed power law model with a high-energy cut-off, and an iron emission line at approximately 6.4 keV. We interpret these results as indicating that XTE J1855-026 is likely to consist of a neutron star accreting from the wind of an O or B supergiant primary. A less likely interpretation is that XTE J1855-026 is instead a Be/neutron star binary, in which case it would have the shortest known orbital period for such a system. | | Source: | arXiv, astro-ph/9901125 | | Services: | Forum | Review | PDF | Favorites | |
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