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Outbursts Large and Small from EXO 2030+375The Be/X-ray pulsar EXO 2030+375 has now been observed for more than 22 years. In this time, it underwent two giant outbursts, in 1985 and 2006, and numerous normal outbursts at its 46-day orbital period. Our observations include daily monitoring of EXO 2030+375 with RXTE from 2006 June through 2007 May and several snapshots of normal outbursts before and after the giant outburst. During this giant outburst, we discovered evidence for a cyclotron feature at about 11 keV. This feature was confidently detected for about 90 days during the brighter portion of the outburst. Daily observations after the giant outburst detected pulsations throughout EXO 2030+375's orbit and included five normal outbursts shifted later in orbital phase relative to those before the giant outburst. Here we will present results from our detailed RXTE observations of the giant outburst and the normal outbursts that surrounded it and examine how they fit into the long-term picture we have of EXO 2030+375 and Be/X-ray binaries.
Document ID
20080018924
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Wilson, Colleen A.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Arranz, Ascension Camero
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Finger, Mark H.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 24, 2013
Publication Date
March 31, 2008
Subject Category
Astronomy
Meeting Information
Meeting: HEAD 2008: High Energy Astrophysics Division
Location: Los Angeles, CA
Country: United States
Start Date: March 31, 2008
End Date: April 3, 2008
Sponsors: American Astronomical Society
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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