GCN Circular 7599
Subject
GRB 080413B: GROND detection of afterglow in all bands
Date
2008-04-13T09:32:15Z (16 years ago)
From
Jochen Greiner at MPI <jcg@mpe.mpg.de>
T. Kruehler, J. Greiner, A. Kupcu Yoldas, C. Clemens, A. Yoldas (all MPE
Garching) and G. Szokoly (Eoetvoes Univ. Budapest and MPE Garching)
report on behalf of the GROND team:
We observed the field of GRB 080413B detected by Swift/BAT (trigger 309111,
Stamatikos et al. 2008, GCN Circ. 7598) simultaneously in g'r'i'z'JHK
with GROND mounted at the 2.2m ESO/MPI telescope at La Silla Observatory
(Chile). Observations started at 08:56 UT on April 13th, 2008, 5 min after
the burst.
We detect a new bright point source at
RA (J2000.0) = 21:44:34.67
DEC (J2000.0) = -19:58:52.4
with an uncertainty of 0.5", which is consistent with the UVOT
position.
The object is detected in all seven bands, implying a redshift
smaller than 3.5.
Preliminary photometry of the first 4 min exposure yields an J band
magnitude of 16.5 calibrated against 2MASS field stars.
The given magnitude is not corrected for the Galactic foreground
reddening of E(B-V)=0.04 mag (Schlegel et al., 1998).