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GCN Circular 30745

GRB 210827A: further Swift-XRT observations
2021-08-30T13:34:23Z (3 years ago)
Paolo D'Avanzo at INAF-OAB <>
P. D'Avanzo, M. G. Bernardini, A. Melandri, T. Sbarrato (INAF-OAB), P. A. Evans (U. Leicester)
 report on behalf of the Swift team:

Swift-XRT has performed further follow-up observations of the Swift/BAT-GUANO-detected burst 
GRB 210827A (James DeLaunay et al. GCN Circ. 30732), collecting a total of 12.2 ks of Photon 
Counting (PC) mode data between T0+44.4 ks and T0+257.2 ks. The uncatalogued candidate 
X-ray source (Source 3) reported in Gropp et al. (GCN Circ. 30734) faded to a count-rate of 3e-3 ct s^-1, 
thus suggesting it as the likely X-ray afterglow of GRB 210827A. The light curve can be described with 
a single power-law with a decay index alpha = 1.0 (+0.5, -0.4). 

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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