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Radio and X-Ray Observations of the 1998 Outburst of the Recurrent X-Ray Transient 4U 1630-47


Hjellming, RM and Rupen, MP and Mioduszewski, AJ and Kuulkers, E and McCollough, M and Harmon, BA and Buxton, M and Sood, R and Tzioumis, A and Rayner, DP and Dieters, S and Durouchoux, P, Radio and X-Ray Observations of the 1998 Outburst of the Recurrent X-Ray Transient 4U 1630-47, The Astrophysical Journal, 514, (1) pp. 383-387. ISSN 0004-637X (1999) [Refereed Article]

DOI: doi:10.1086/306948


We report radio (NRAO VLA and Australia Telescope Compact Array), soft X-ray (Rossi X-Ray Timing Explorer ASM), and hard X-ray (Compton Gamma Ray Observatory BATSE) observations of a 1998 outburst in the recurring X-ray transient 4U 1630-47, where radio emission was detected for the first time. The radio observations identify the position of 4U 1630-47 to within 1″. Because the radio emission is optically thin with a spectral index of ∼-0.8 during the rise, peak, and decay of the initial radio event, the emission is probably coming from an optically thin radio jet ejected over a period of time. The 20-100 keV emission first appeared 1998 January 28 (MJD 50841), the 2-12 keV emission first appeared 1998 February 3 (MJD 50847), and the first radio emission was detected 1998 February 12.6 (MJD 50856.6). The rise of the radio emission probably began about 1998 February 7 (MJD 50851) when the X-rays were in a very hard fluctuating-hardness state, just before changing to a softer, more stable hardness state.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Rayner, DP (Mr David Peter Rayner)
UTAS Author:Dieters, S (Dr Stefan Dieters)
ID Code:16851
Year Published:1999
Web of Science® Times Cited:41
Deposited By:Physics
Deposited On:1999-08-01
Last Modified:2012-03-13

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