{
  "bibcode": "1999GCN...468....1S",
  "body": "Bradley E. Schaefer (Yale) and Patrick Seitzer (Michigan) report:\n\n\"We have obtained R-band and V-band images of GRB991216 and find no\ntransient source in a comparison with the Digital Sky Survey.  The first\nimages were taken at 23:45 UT as 60 second V-band and R-band images with\nthe Schmidt telescope on CTIO.  The next image was a 10 minute R-band\nimage with the Yale 1m telescope on CTIO starting at 23:52 UT (over a\n10.2'X10.2' FOV). These images start 7.6 hours after the burst.  The\ncomparison with the Digital Sky Survey, has the usual difficulties that\n(a) the DSS does not go as deep as our images, (b) color effects near the\nDSS threshold make for a fuzzy limit.  \n\nWe have already taken BVRI images with the CTIO Schmidt and UBVRIK images\nwith the Yale 1m.  We are now repeating these sequences to allow for the\ndetection of variable sources.\n\nWith GRB991216 being one of the all-time brightest BATSE bursts, the\nratio of the gamma-ray luminosity to the optical afterglow luminosity is\nat least roughly one order of magnitude larger than for any other known\nburst.\n\nIt is often convenient to have a 'proper name' for sources frequently\ndiscussed, so whimsically, we propose that GRB991216 be informally called\nthe 'Beethoven Burst' in honor of the composer's birthday.\"",
  "circularId": 468,
  "createdOn": 945413040000,
  "email": "schaefer@grb2.physics.yale.edu",
  "subject": "GRB991216 Optical Observations",
  "submitter": "Brad Schaefer at Yale U  <schaefer@grb2.physics.yale.edu>",
  "eventId": "GRB 991216"
}