{
  "bibcode": "2008GCN..7523....1H",
  "body": "J. Hill (LBTO/UAz), R. Ragazzoni, A. Baruffolo (Padova), and\nP. Garnavich (Notre Dame) report:\n\nThe Large Binocular Telescope (LBT) observed the position of GRB 080310\n(Chornock et al. GCN 7381; Cummings et al., GCN 7382) with the\nLBC red and blue cameras between March 19.3 and 19.5 (UT). Twenty\n200 sec exposures in the Sloan-r filter were obtained in 1.3\"\nseeing and with a significant sky background from the Moon.\n\nThe combined image shows a faint source present at the position\nof the afterglow. From stars calibrated in the SDSS we estimate\nthe brightness of the source to be r=25.4+/-0.2 mag. This is\nconsistent with an afterglow  power-law decay index of 2.4 between\n2 and 9 days after the burst (Wegner et al., GCN 7423). The\ntrue afterglow decay rate could be steeper if host galaxy light\nis contributing to the source flux.\n\nA faint galaxy (r~24) is detected 2.1\" southeast of the afterglow and\nanother is 3.0\" to the southwest. For a redshift of 2.43 and a standard\ncosmology, the projected distances from the afterglow are 17 kpc and\n24 kpc. These galaxies may be the source of the two foreground absorption\nline systems observed in the afterglow spectrum (Vreeswijk et al., GCN\n7391).\n\n\nThe LBT is an international collaboration among institutions in the\nUnited States, Italy and Germany. The LBT Corporation partners are:\n*  The University of Arizona on behalf of the Arizona university system\n*  Istituto Nazionale di Astrofisica, Italy\n*  LBT Beteiligungsgesellschaft, Germany, representing the Max Planck\nSociety, the Astrophysical Institute Potsdam, and Heidelberg University\n*  The Ohio State University\n*  The Research Corporation, on behalf of The University of Notre Dame,\nUniversity of Minnesota and University of Virginia\n\nThis message may be cited.",
  "circularId": 7523,
  "createdOn": 1206548575000,
  "email": "pgarnavi@nd.edu",
  "subject": "GRB080310, late-time photometry with LBT",
  "submitter": "Peter Garnavich at U of Notre Dame  <pgarnavi@nd.edu>",
  "eventId": "GRB 080310"
}