Skip to main content
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 22023

GRB 171010B: Swift-XRT afterglow detection
2017-10-18T13:07:12Z (7 years ago)
Kim Page at U.of Leicester <>
A. Melandri (INAF-OAB), D.N. Burrows (PSU), A. Tohuvavohu (PSU), S. J.
LaPorte (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester),
A.P. Beardmore (U. Leicester), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC)
and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team:

Swift-XRT has conducted further observations of the field of the
Swift/BAT-detected burst GRB 171010B (Palmer et al. GCN Circ. 21995).
The observations now extend from T0+91.1 ks to T0+614.5 ks. 

Of the sources reported by Sbarufatti et al. (GCN Circ. 22009), "Source
2" is  believed to be the afterglow.  The position of this source is
RA, Dec=34.1342, -54.3915 which is equivalent to:

RA (J2000): 02:16:32.20
Dec(J2000): -54:23:29.2

with an uncertainty of 5.6 arcsec (radius, 90% confidence).  This
position is 71 arcsec from the Swift/BAT position. 

The light curve can be modelled with a power-law decay with a decay
index of alpha=0.8 (+0.6, -0.4).

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

This circular is an official product of the Swift-XRT team.
Looking for U.S. government information and services? Visit