GCN Circular 8984
Subject
GRB 090313: SDSS object underlying the optical afterglow position
Date
2009-03-13T13:26:03Z (15 years ago)
From
Edo Berger at Harvard <eberger@cfa.harvard.edu>
E. Berger (Harvard) reports:
"Inspection of archival Sloan Digital Sky Survey images reveals a faint
(and apparently extended) object near the position of the optical
afterglow (GCN 8979) of GRB 090313 (GCN 8980). The object is located at:
RA = 13:13:36.08
DEC = 08:05:51.06 (J2000)
which is 2.3" away from the optical afterglow position provided by
Chornock et al. (GCN 8979). The SDSS model magnitudes of this object are:
g = 22.8+/-0.3
r = 21.6+/-0.16
i = 21.1+/-0.18
z = 20.7+/-0.4
A much brigher galaxy is located 17.8" away from the optical afterglow
position at:
RA = 13:13:35.29
DEC = 08:05:38.54 (J2000)
which we consider to be the galaxy mentioned by Chornock et al. (given its
brightness). The SDSS model magnitudes of this galaxy are:
u = 17.07+/-0.01
g = 16.02+/-0.01
r = 15.57+/-0.01
i = 15.32+/-0.01
z = 15.14+/-0.01
A direct determination of the afterglow redshift is required in order to
determine which of the two objects is the host galaxy."