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GCN Circular 17270

GRB 150103A: Prompt enhanced Swift-XRT position
2015-01-03T20:37:39Z (10 years ago)
Phil Evans at U of Leicester <>
P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team:

Using  promptly downlinked XRT event data for GRB 150103A, we find an
enhanced XRT position of the afterglow: RA, Dec: 131.6663, -48.8863
which is equivalent to:
   RA (J2000)  = 08 46 39.92
   Dec (J2000) = -48 53 10.6
with an uncertainty of 2.0 arcseconds (radius, 90% confidence).
Analysis of the promptly available data is online at

Position enhancement is is described by Goad et al. (2007, A&A, 476,
1401) and Evans et al. (2009, MNRAS, 397, 1177).

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