[vsnet-grb-info 5864] GRB 080319D: GROND Detection of the Optical Counterpart

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  7514
SUBJECT: GRB 080319D: GROND Detection of the Optical Counterpart
DATE:    08/03/25 12:41:09 GMT
FROM:    Christian Clemens at MPE  <cclemens at mpe.mpg.de>

C. Clemens, S. Klose (Tautenburg Obs.), J. Greiner, A. Kupcu Yoldas, A. 
Yoldas, T. Kruehler and G. Szokoly (Eoetvoes Univ., Budapest and MPE 
Garching) (all others MPE Garching) report on behalf of the GROND team:

We observed the field of GRB 080319D for a second time at 23:43 UT on March 
23rd, 2008, about 4.3 days after the GRB trigger with 0.5 hrs of total 
integration time in g', r', i' and z'.

We do not detect any object within the Swift UVOT error circle (S. Immler et 
al., GCN #7458) to the following 3-sigma upper limits:

g' > 24.7, r' > 23.4, i' > 22.7 and z' > 22.5.

This indicates a clear fading of the optical afterglow compared to our first 
epoch observations (C. Clemens et al., GCN #7503).