[vsnet-grb-info 483] GRB 021004: Optical/NIR Observations

[GCN Circulars <gcncirc@lheawww.gsfc.nasa.gov>]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  1623
SUBJECT: GRB 021004: Optical/NIR Observations
DATE:    02/10/11 17:05:00 GMT
FROM:    Daniele Malesani at Brera Astro. Obs.  <malesani@merate.mi.astro.it>

Stefanon M., Covino S., Malesani D., Ghisellini G., (INAF-Brera),
Fugazza D., Tessicini G. (INAF-TNG), Masetti N. (IASF-CNR), Pian E.
(INAF-OATs), on behalf of a larger Italian collaboration, report:

On Oct 10.1 UT, we observed the optical counterpart of GRB 021004
(Shirasaki et al., GCN 1565; Fox, GCN 1564) using the 3.6m TNG telescope
in the Canary Islands, with DOLORES (B and R filters) and NICS (H
filter).  Calibration was performed with respect to the comparison star
used by Fox and calibrated by Henden (GCN 1583) and the 2MASS
calibration of the field. The source has the following magnitudes:

UT      Band    Mag     Error
10.072  H       18.80   0.05
10.105  R       21.05   0.05
10.115  B       22.12   0.05


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