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GCN Circular 24554

GRB 190515B: Prompt enhanced Swift-XRT position
2019-05-15T16:35:25Z (5 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 190515B, we find an
enhanced XRT position of the afterglow: RA, Dec: 98.8489, 52.3168 which
is equivalent to:
   RA (J2000)  = 06 35 23.73
   Dec (J2000) = +52 19 00.4
with an uncertainty of 2.2 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.

[GCN OPS NOTE(15may19): Per author's request, the GRB name was changed from 
"190515A" to "190515B" in the Subject line and the first sentence.]
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