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When a Standard Candle Flickers: Crab Nebula Variations in Hard X-raysThe Crab Nebula was surprisingly variable from 2001-2010, with less variability before 2001 and since mid-2010. We presented evidence for spectral softening from RXTE, Swift/BAT, and Fermi GBM during the mid-2008-2010 flux decline. We will miss RXTE, but will continue our monitoring program using Fermi/GBM, MAXI, and Swift/BAT.
Document ID
20120014490
Acquisition Source
Marshall Space Flight Center
Document Type
Presentation
Authors
Wilson-Hodge, Colleen A. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 26, 2013
Publication Date
March 29, 2012
Subject Category
Astronomy
Report/Patent Number
M12-1685
Report Number: M12-1685
Meeting Information
Meeting: 16 Years of Discovery with RXTE: A Celebratio of the Mission
Location: Greenbelt, MD
Country: United States
Start Date: March 29, 2012
End Date: March 30, 2012
Sponsors: NASA Goddard Space Flight Center
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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