Hurkett 2008 Line Searches in Swift X-ray Spectra

主要内容:
No strong evidence for emission line in X-ray.
Contains method and data.

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文章信息:

· arXiv e-print (arXiv:0802.0441)

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Title:		Line Searches in Swift X-ray Spectra
Authors:		Hurkett, C. P.; Vaughan, S.; Osborne, J. P.; O'Brien, P. T.; Page, K. L.; Beardmore, A.; Godet, O.; Burrows, D. N.; Capalbi, M.; Evans, P.; Gehrels, N.; Goad, M. R.; Hill, J. E.; Kennea, J.; Mineo, T.; Perri, M.; Starling, R.
Publication:		eprint arXiv:0802.0441
Publication Date:		02/2008
Origin:		ARXIV
Keywords:		Astrophysics
Comment:		Accepted by ApJ
Bibliographic Code:		2008arXiv0802.0441H

Abstract

Prior to the launch of the Swift mission several X-ray line detections were reported in Gamma Ray Burst afterglow spectra. To date, these pre-Swift era results have not been conclusively confirmed. The most contentious issue in this area is the choice of statistical method used to evaluate the significance of these features. In this paper we compare three different methods already extant in the literature for assessing the significance of possible line features and discuss their relative advantages and disadvantages. The methods are demonstrated by application to observations of 40 bursts from the archive of Swift XRT at early times (<> Bibtex entry for this abstract Preferred format for this abstract (see Preferences)