GCN Circular 12428
Subject
GRB 111008A, GROND observations
Date
2011-10-09T06:31:49Z (13 years ago)
From
Sylvio Klose at TLS Tautenburg <klose@tls-tautenburg.de>
M. Nardini (Milano Bicocca), S. Klose (TLS Tautenburg), J. Greiner (MPE
Garching), and P. Afonso (MPE/American River College) report on behalf of
the GROND team:
We observed the field of GRB 111008A (Saxton et al., GCN #12423)
simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120,
405) mounted at the 2.2 m MPG/ESO telescope at La Silla Observatory
(Chile).
Observations started at 4:30 UT on October 08, 6.3 hours after the GRB
trigger.
We detect a point source within the 1.7 arcsec enhanced Swift-XRT error
circle (Beardmore et al., GCN #12425) at coordinates RA, DEC (J2000) =
04:01:48.25, -32:42:33.2 (+/-0.5"), confirming the observations from
Gemini (Levan et al., GCN 12426).
Preliminary magnitudes at a meantime of 5:15 UT are (in the AB system):
g' > 24.0,
r' = 22.6 +/- 0.1,
i' = 20.9 +/- 0.1,
z' = 19.9 +/- 0.1,
indicating a cosmological g-band dropout.
Data are calibrated against GROND zeropoints. Observations are ongoing.