GCN Circular 3300
Subject
GRB 050421: NIR observations
Event
Date
2005-04-21T10:08:29Z (20 years ago)
From
Daniele Malesani at SISSA-ISAS,Trieste,Italy <malesani@sissa.it>
D. Fugazza (INAF-OABr), L.A. Antonelli, V. Testa (INAF-OAR), L. Di
Fabrizio, G. Tessicini (INAF-TNG), and D. Malesani (SISSA), report on
behalf of a larger collaboration:
We imaged the field of GRB 050421 (Barbier et al., GCN 3296) with the
Italian 3.6m TNG. Observations were carried out under moderate observing
conditions (seeing ~0.8"), just before the dawn. Exposures were acquired
in the K filter, for a total integration time of 20 min, starting on Apr
21.2313 UT (mean time Apr 21.2453 UT, 1.7 h after the GRB).
We find no sources within the XRT error circle, down to a limiting
magnitude K = 18.6 (3 sigma).
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