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GCN Circular 15120

GRB 130822A: Swift-XRT refined Analysis
2013-08-23T12:12:03Z (11 years ago)
Phil Evans at U of Leicester <>
A. Melandri (INAF-OAB), B. Sbarufatti (INAF-OAB/PSU), J.A. Kennea
(PSU), V. Mangano (PSU), M.C. Stroh (PSU), K.L. Page (U. Leicester), C.
Pagani (U. Leicester), A.P. Beardmore (U. Leicester), P. D'Avanzo
(INAF-OAB) and D. Kocevski report on behalf of the Swift-XRT team:

We have analysed 7.2 ks of XRT data for GRB 130822A (Kocevski  et al.
GCN Circ. 15112),  from 85 s to 41.0 ks after the  BAT trigger. The
data are entirely in Photon Counting (PC) mode. The enhanced XRT
position for this burst was given by Beardmore et al. (GCN. Circ
15117). The source is fading with alpha >0.5.

If the light curve continues to decay with a power-law decay index of ,
the count rate at T+24 hours will be 2.8 x 10^-5 count s^-1

The results of the XRT-team automatic analysis are available at

This circular is an official product of the Swift-XRT team.
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