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Title: The Swift Burst Analyser I. BAT and XRT spectral and flux evolution of gamma ray bursts
Authors: Evans, P. A.
Willingale, R.
Osborne, J. P.
O'Brien, P. T.
Page, K. L.
Markwardt, C. B.
Barthelmy, S. D.
Beardmore, A. P.
Burrows, D. N.
Pagani, C.
Starling, R. L. C.
Gehrels, N.
Romano, P.
First Published: 20-Sep-2010
Publisher: EDP Sciences for European Southern Observatory (ESO)
Citation: Astronomy and Astrophysics , 2010, 519, A102
Abstract: Context: Gamma ray burst models predict the broadband spectral evolution and the temporal evolution of the energy flux. In contrast, standard data analysis tools and data repositories provide count-rate data, or use single flux conversion factors for all of the data, neglecting spectral evolution. Aims: We produce Swift BAT and XRT light curves in flux units, where the spectral evolution is accounted for. Methods: We have developed software to use the hardness ratio information to track spectral evolution of GRBs, and thus to convert the count-rate light curves from the BAT and XRT instruments on Swift into accurate, evolution-aware flux light curves. Results: The Swift Burst Analyser website ( contains BAT, XRT and combined BAT-XRT flux light curves in three energy regimes for all GRBs observed by the Swift satellite. These light curves are automatically built and updated when data become available, are presented in graphical and plain-text format, and are available for download and use in research.
DOI Link: 10.1051/0004-6361/201014819
ISSN: 0004-6361
eISSN: 1432-0746
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2010 ESO. Reproduced with permission from Astronomy & Astrophysics, © ESO.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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