ISSN 1002-1027　　CN 11-2952/G2

### The Observations of the X-ray Pulsars

QIAO Guojun, XU Renxin

1. Department of Geophysics, Peking University, Beijing, 100871; CAS-PKU.BAC; JLHEP, IHEP, CAS Beijing, 100039
• Received:1997-04-30 Online:1998-09-20 Published:1998-09-20

Abstract: The basic observations of the X-ray pulsars have been reviewed, including the binary star systems, the strong magnetic fields of neutron stars, the determination of the masses of neutron star and its company, etc. Usually, the X-ray pulsars have been found in the High Mass X-ray Binaries(HMXB), and the X-ray bursts have been found in the Low Mass X-ray Binaries(LMXB). However, as an X-ray pulsar, GRO J1744-28, discovered by the Compton (gama)-ray Observatory in the December 2(1995), acts also as an X-ray burster. This new discovery has been introduced in this paper.