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 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).