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GCN Circular 16147

Subject

GRB 140423A: Swift/UVOT detection of a possible counterpart

Date

2014-04-23T10:49:48Z (10 years ago)

From

Margaret Chester at PSU <chester@swift.psu.edu>

M. M. Chester (PSU), E. Sonbas (NASA/GSFC/Adiyaman Univ.), K. L. Page 
(U Leicester), D. Malesani (DARK/NBI), and S. R. Oates (UCL-MSSL)
report on behalf of the Swift/UVOT team:


Swift/UVOT took a finding chart exposure of 150 seconds with the White filter
starting 2946 seconds after the BAT trigger. A faint source (19.6 +/- 0.4 mag) 
is detected in the White filter which is consistent with the candidate reported 
by Elenin et al. (GCN Circ. 16143Not found
 
 
) but not consistent with the Swift/XRT position 
reported by D. N. Burrows et al. (GCN Circ. 16146Not found
 
 
).  The separation from the XRT 
position is 9.6 arcsec.  The preliminary UVOT position is

   RA (J2000)  197.28546 (13:09:08.51)
  Dec (J2000)   49.84133 (+49:50:28.8)

with an estimated uncertainty of 1.1 arcsec (radius, 90% confidence,
statistical + systematic).  No correction has been made for the
expected extinction corresponding to E(B-V) of 0.01.