GCN Circular 5422
Subject
GRB 060807: K- and R-band observations
Event
Date
2006-08-08T01:46:21Z (20 years ago)
From
Daniele Malesani at SISSA-ISAS,Trieste,Italy <malesani@sissa.it>
D. Malesani (SISSA) & S. Piranomonte (INAF/Roma) report on behalf of the
MISTICI collaboration:
We observed the candidate optical counterpart (Fynbo et al., GCN 5420)
of GRB 060807 (De Pasquale et al., GCN 5409; Barthelmy et al., GCN
5421). Observations were carried out in the K and R filters, with
NTT+SofI and VLT+FORS1, respectively. The mean times were 8.46 and 8.72
hr after the burst.
The candidate is well detected in both filters, and shows a very red
color. Preliminary calibrations against 2MASS and USNO-B1 (R1
magnitudes) shows R-K ~ 5 (assuming negligible time variations between
the two epochs). We warn that there is some scatter (by ~0.2 mag) in the
calibration for both the R- and K bands, so this value should be still
considered as preliminary.
We acknowledge prompt support from the VLT and NTT observing staffs, in
particular Claudio Melo and Valentin Ivanov.
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