Studies of accreting millisecond pulsar XTE J1807-294 observed with the XMM-Newton.
Abstract
The accreting millisecond pulsar XTE J1807-294 was observed as a target of opportunity by the XMM-Newton on March 22, 2003 after its discovery in February 21,2003 as fourth candidate of this class by RXTE. The source was detected in its bright phase (3.7 mCrab) with observed average count rate of 33.3 cts s-1 in the EPIC pn-camera in the 0.5-10 keV energy band. We derived 4.8±0.1 lt-ms projected orbital radius of the binary system and an epoch of mean longitude at 90 deg at MJD 52720.674, using earlier established orbital period of 40.0741±0.0005 minutes. The barycentric mean spin-period of the pulsar was derived as 5.2459427±0.0000004 ms. From our detail investigations on important properties of this compact binary system, we predict evolution scenario and conclude that XTE J1807-294 is very likely candidatefor a millisecond radio pulsar.
- Publication:
-
35th COSPAR Scientific Assembly
- Pub Date:
- 2004
- Bibcode:
- 2004cosp...35.3109M