Discovery of 101-s pulsations from AX J0057.4-7325 in the SMC with ASCA

被引：10

作者：

Yokogawa, J ^{[1
]}

Torii, K

Kohmura, T

Imanishi, K

Koyama, K

机构：

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

[2] Natl Space Dev Agcy Japan, Tsukuba, Ibaraki 3058505, Japan

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

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2000年 / 52卷 / 06期

关键词：

pulsars : individual (AX J0057.4-7325); stars : neutron; X-rays : stars;

D O I：

10.1093/pasj/52.6.L53

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The results from two ASCA observations of AX J0057.4-7325 = RX J0057.3-7325 are presented. Coherent pulsations with a barycentric period of 101.45 +/- 0.07 s were discovered in the second observation. The X-ray spectrum was found to be hard (photon index similar to 0.9) and unchanged through these observations, except for the flux. The ROSAT archival data show that AX J0057.4-7325 exhibits a flux variation with a factor greater than or similar to 10. A discussion on a possible optical counterpart is given.

引用

页码：L53 / L56

页数：4

共 22 条

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