{
  "bibcode": "2008GCN..8106....1T",
  "body": "Christina C. Thoene (DARK/NBI), Antonio de Ugarte Postigo (ESO) and\nChristine Liebig (ARI Heidelberg) report:\n\nWe observed the field of GRB 080810 (Page et al. GCN 8080) with the Danish\n1.54m telescope on La Silla/Chile on August 15.40 UT and 16.31 UT (4.85\nand 5.76 days after the burst onset). We detect the decaying afterglow at\npreliminary R-band magnitudes of 22.8+/-0.3 and 23.2+/-0.5.\n\nUsing the R band and unfiltered magnitudes published in GCNs (Rykoff et\nal. GCN 8084, Burenin et al. GCN 8088, de Ugarte Postigo et al. GCN 8089 &\n8090, Okuma et al. GCN 8091, Kocka et al. GCN 8092, Guidorzi et al. GCN\n8093 & 8099, Andreev et al. GCN 8094, Yoshida et al. GCN 8097, Galeev et\nal. GCN 8098 & 8102, Rumyantsev et al. GCN 8105) together with the data of\nour own observations we find that the light curve can be described by a\npowerlaw of index alpha = 1.12 +/- 0.02 between 400s and 1 day after the\nburst. After 1 day there is a flux excess that can be seen both in the\noptical and X-ray light curves (explaining the flattening measured by\nGaleev et al., GCN8098 and Guidorzi et al., GCN8099), after which the\nlight curve begins to decay more steeply with an index in the optical of\nalpha = 1.8 +/- 0.3.\n\nHail, thunderstorm and heavy rain currently prevent further observations\nfrom the DK 1.54m.\n\nC. Thoene and C. Liebig acknowledge the excellent cheese fondue at the\nSwiss telescope yesterday evening.",
  "circularId": 8106,
  "createdOn": 1218922973000,
  "email": "cthoene@astro.ku.dk",
  "subject": "GRB080810 - optical observations",
  "submitter": "Christina Thoene at Niels Bohr Institute,DARK Cosmo Ctr  <cthoene@astro.ku.dk>",
  "eventId": "GRB 080810"
}