GCN Circular 30829
Subject
GRB 210912A: Host-galaxy candidate in PanSTARRS
Event
Date
2021-09-12T18:48:08Z (4 years ago)
From
Alexander Kann at IAA-CSIC <kann@iaa.es>
D. A. Kann (HETH/IAA-CSIC) reports:
At the afterglow position (Hu et al., GCN #30823, see also Pankov et
al., GCN #30825) of the Swift GRB 210912A (Troja et al., GCN #30820), an
object is visible in Pan-STARRS pre-imaging at position (J2000):
RA = 129.89171813
Dec. = +79.22157927
in agreement with the position given by Hu et al., GCN #30823,
with magnitudes:
g' = 23.19 +/- 0.23 mag,
r' = 23.09 +/- 0.36 mag,
i' = 22.48 +/- 0.13 mag,
z' = 22.43 +/- 0.25 mag.
It is undetected in Y.
We suggest this object to be the host galaxy of GRB 210912A. This may be
indicative that this is a low-redshift event which may be followed by a
detectable supernova.
Further follow-up despite the very northerly position is warranted.