A Caltech Library Service

ASCA Observations of Soft X-Ray Transients in Quiescence: X1608-52 and Cen X-4

Asai, K and Dotani, K. and Mitsuda, R. and Hoshi, B. and Vaughan, Y. and Tanaka, H. and Inoue, H. (1996) ASCA Observations of Soft X-Ray Transients in Quiescence: X1608-52 and Cen X-4. Publications of the Astronomical Society of Japan, 48 (2). pp. 257-263. ISSN 0004-6264. doi:10.1093/pasj/48.2.257.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


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 ~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.

Item Type:Article
Related URLs:
URLURL TypeDescription
Additional Information:© 1996 Astronomical Society of Japan. Provided by the NASA Astrophysics Data System. Received November 6, 1995. Accepted January 26, 1996. First published online April 1, 1996. The authors thank the ASCA team members for their support. R.H. and K.M. are grateful to N. Shibazaki for stimulating discussions. Y. T. acknowledges the support from the Alexander von Humboldt Foundation.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
Alexander von Humboldt FoundationUNSPECIFIED
Non-Subject Keywords:Stars: neutron - X-rays: binaries - X-rays: sources - X-rays: transients
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1997-55
Issue or Number:2
Record Number:CaltechAUTHORS:20141203-152933487
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52356
Deposited By: Deborah Miles
Deposited On:08 Dec 2014 03:51
Last Modified:10 Nov 2021 19:25

Repository Staff Only: item control page