The Swift burst analyser: I. BAT and XRT spectral and flux evolution of gamma ray bursts

P. A. Evans; R. Willingale; J. P. Osborne; P. T. O'brien; K. L. Page; C. B. Markwardt; S. D. Barthelmy; A. P. Beardmore; D. N. Burrows; C. Pagani; R. L.C. Starling; N. Gehrels; P. Romano

doi:10.1051/0004-6361/201014819

The Swift burst analyser: I. BAT and XRT spectral and flux evolution of gamma ray bursts

P. A. Evans, R. Willingale, J. P. Osborne, P. T. O'brien, K. L. Page, C. B. Markwardt, S. D. Barthelmy, A. P. Beardmore, D. N. Burrows, C. Pagani, R. L.C. Starling, N. Gehrels, P. Romano

Astronomy & Astrophysics

Research output: Contribution to journal › Article › peer-review

157 Scopus citations

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 (http://www.swift.ac.uk/burst-analyser) 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.

Original language	English (US)
Article number	A102
Journal	Astronomy and Astrophysics
Volume	519
Issue number	12
DOIs	https://doi.org/10.1051/0004-6361/201014819
State	Published - Sep 20 2010

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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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. (2010). The Swift burst analyser: I. BAT and XRT spectral and flux evolution of gamma ray bursts. Astronomy and Astrophysics, 519(12), Article A102. https://doi.org/10.1051/0004-6361/201014819

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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 (http://www.swift.ac.uk/burst-analyser) 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.",

author = "Evans, {P. A.} and R. Willingale and Osborne, {J. P.} and O'brien, {P. T.} and Page, {K. L.} and Markwardt, {C. B.} and Barthelmy, {S. D.} and Beardmore, {A. P.} and Burrows, {D. N.} and C. Pagani and Starling, {R. L.C.} and N. Gehrels and P. Romano",

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doi = "10.1051/0004-6361/201014819",

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T2 - I. BAT and XRT spectral and flux evolution of gamma ray bursts

AU - Evans, P. A.

AU - Willingale, R.

AU - Osborne, J. P.

AU - O'brien, P. T.

AU - Page, K. L.

AU - Markwardt, C. B.

AU - Barthelmy, S. D.

AU - Beardmore, A. P.

AU - Burrows, D. N.

AU - Pagani, C.

AU - Starling, R. L.C.

AU - Gehrels, N.

AU - Romano, P.

PY - 2010/9/20

Y1 - 2010/9/20

N2 - 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 (http://www.swift.ac.uk/burst-analyser) 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.

AB - 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 (http://www.swift.ac.uk/burst-analyser) 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.

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The Swift burst analyser: I. BAT and XRT spectral and flux evolution of gamma ray bursts

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