X-ray emission from the PSR B1259--63 system near apastron

Details X-ray emission from the PSR B1259--63 system near apastron X-ray emission from the PSR B1259--63 system near apastron

1995-01-26

arxiv.org/abs/astro-ph/9501095v1

Astronomy and Astrophysics

Astrophysics

LATEX, Accepted for publ. in ApJL

Scientific paper

10.1086/187785

The PSR B1259--63 system contains a 47 ms radio pulsar in a highly eccentric binary with a Be-star companion. Strongly time variable X-ray emission was reported from this system as the pulsar was near apastron in 1992-early 1993. The variability was primarily deduced from an apparent non-detection of the \psr system during a first pre-apastron \ros observation in February~1992. We have re-analyzed the \ros observations of the \psr system. Contrary to the results of a previous analysis, we find that the \psr system was detected by \ros during the first off-axis February~1992 observation. The intensity of the soft X-ray emission of the \psr system before and after the 1992 apastron appears to vary at most by a factor $\sim 2$. Our results sensibly constrain theoretical models of X-ray emission from the \psr system.

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