ASCA observations of soft X-ray transients in quiescence: X1608-52 and Cen X-4

被引：77

作者：

Asai, K

Dotani, T

Mitsuda, K

Hoshi, R

Vaughan, B

Tanaka, Y

Inoue, H

机构：

[1] RIKEN, INST PHYS & CHEM RES, WAKO, SAITAMA 35001, JAPAN

[2] RIKKYO UNIV, DEPT PHYS, TOSHIMA KU, TOKYO 171, JAPAN

[3] CALTECH, DEPT PHYS, SPACE RADIAT LAB, PASADENA, CA 91125 USA

[4] MAX PLANCK INST EXTRATERR PHYS, D-85748 GARCHING, GERMANY

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 1996年 / 48卷 / 02期

关键词：

stars; neutron; X-rays; binaries; sources; transients;

D O I：

10.1093/pasj/48.2.257

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We observed soft X-ray transients; X1608-52 and Cen X-4, in quiescence with ASCA at X-ray luminosities on the order of 10(32-33) erg s(-1). The energy spectra were rather soft for both sources. Blackbody fits to the data required characteristic temperatures of 0.2-0.3 keV and emission regions of similar to 10 km(2). A conspicuous hard tail remained after fitting Cen X-4 with a blackbody curve. An extremely soft spectrum in quiescence seems to be a common property of soft X-ray transients.

引用

页码：257 / 263

页数：7

共 45 条

[1] THERMAL EQUILIBRIA OF ACCRETION DISKS [J].