A 168-s X-ray pulsar in the small magellanic cloud observed with ASCA

被引：3

作者：

Yokogawa, J ^{[1
]}

Torii, K

Kohmura, T

Koyama, K

机构：

[1] Kyoto Univ, Grad Sch Sci, Dept Phys, Sakyo Ku, Kyoto 6068502, Japan

[2] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan

[3] Osaka Univ, Grad Sch Sci, Dept Earth & Space Sci, Toyonaka, Osaka 5600043, Japan

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2001年 / 53卷 / 03期

关键词：

pulsars : individual (AX J0052.9-7157; RX J0052.9-7158; XTE j0054-720); stars; emission-line; Be; stars : neutron; X-rays : stars;

D O I：

10.1093/pasj/53.3.L9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on the detection of 167.8 +/- 0.2s pulsations from AX J0052.9-7157 in the Small Magellanic Cloud with ASCA. The pulsations show an energy-independent sinusoidal profile. The X-ray spectrum has been described by an absorbed hard power-law (photon index similar to 0.7) with a luminosity of similar to 8.8 x 10(35) ergs(-1) at a distance of 60kpc. The position is determined to be (R.A., Dec.)(J2000) = (00(h)52(m)59.(s)2, -71 degrees 57 ' 58 "), with an error radius of similar to 30 ". We have found that a variable Be/X-ray binary RX J0052.9-7158 is located within the 30 " error circle, and is also located at the edge of the 10 ' error circle of the 169-s pulsar XTE J0054-720. We therefore conclude that these are the same source, a Be/X-ray binary pulsar.

引用

页码：L9 / L12

页数：4

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