[vsnet-grb-info 502] GRB 021008, optical observations

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

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  1642
SUBJECT: GRB 021008, optical observations
DATE:    02/10/17 08:10:29 GMT
FROM:    Sylvio Klose at TLS Tautenburg  <klose@tls-tautenburg.de>

A. J. Castro-Tirado (IAA-CSIC, Granada),
S. Klose (TLS, Tautenburg),
L. Wisotzki, S. Huferath (AIP, Potsdam),
J. Greiner (MPE, Garching),
J. M. Castro Ceron (ROA, San Fernando), and
J. Gorosabel (IAA-CSIC)

report:


Following the detection of the very high fluence gamma-ray burst GRB
021008 (GCN 1617, 1625), we have observed the IPN error box given by
Hurley et al. (GCN 1629) with the 2.2m telescope at Calar Alto (Spain)
on Oct 14.21 UT (3 x 200 sec, I band) and Oct 15.21 UT (5 x 200 sec,
R band) at a high airmass, just before the twilight (5.9 and 6.9 days,
respectively, after the burst trigger). The combined R-band image goes
~1 mag deeper than the corresponding DSS-2 red image. No optical
transient is found down to the DSS-2 limit (R ~ 20).

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