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Discovery of Pulsed X-Ray Emission from the Small Magellanic Cloud Transient RX J0117.6–7330

Macomb, D. J. and Finger, M. H. and Harmon, B. A. and Lamb, R. C. and Prince, T. A. (1999) Discovery of Pulsed X-Ray Emission from the Small Magellanic Cloud Transient RX J0117.6–7330. Astrophysical Journal, 518 (2). L99-L102. ISSN 0004-637X. doi:10.1086/312074.

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We report on the detection of pulsed, broadband, X-ray emission from the transient source RX J0117.6-7330. The pulse period of 22 s is detected by the ROSAT/PSPC instrument in a 1992 September 30-October 2 observation and by the Compton Gamma-Ray Observatory/BATSE instrument during the same epoch. Hard X-ray pulsations are detectable by BATSE for approximately 100 days surrounding the ROSAT observation (1992 August 28-December 8). The total directly measured X-ray luminosity during the ROSAT observation is 1.0 × 10^(38) (d/60 kpc)^2 ergs s^(-1). The pulse frequency increases rapidly during the outburst, with a peak spin-up rate of 1.2 × 10^(−10) Hz s^(-1) and a total frequency change of 1.8%. The pulsed percentage is 11.3% from 0.1-2.5 keV, increasing to at least 78% in the 20-70 keV band. These results establish RX J0117.6-7330 as a transient Be binary system.

Item Type:Article
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Prince, T. A.0000-0002-8850-3627
Additional Information:© 1999. The American Astronomical Society. Received 1999 January 13; accepted 1999 April 14; published 1999 May 25. This project made use of software and data provided by the High-Energy Astrophysics Archival Research Center (HEASARC) located at Goddard Space Flight Center. This work was supported at Caltech in part by NASA NAG5-3239.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
Subject Keywords:accretion, accretion disks—stars: individual (RX J0117.6-7330)—X-rays: general
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Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1999-63
Issue or Number:2
Record Number:CaltechAUTHORS:20150218-153734159
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:54959
Deposited By: Deborah Miles
Deposited On:24 Feb 2015 20:49
Last Modified:10 Nov 2021 20:39

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