{
  "bibcode": "2007GCN..6090....1S",
  "body": "H. Swan (U. Michigan), I. Smith (Rice), M. Skinner (AMOS Observatory,\nBoeing LTS), R. Russell, (Aerospace Corporation),\nreport on behalf of the MARGE collaboration:\n\nThe AEOS Burst Camera (ABC) on the AEOS telescope located at the Maui \nSpace Surveillance System on Haleakala Maui began imaging Swift \nGRB070208 (GCN 6074 Sato et al) on Feb 8, 2007 at 09:22:38.11 UTC, ~12 \nminutes after the GRB was detected. These are unfiltered optical images. \n  After coadding our 10s images in sets of 10, we find the OT first \nidentified by Guidorzi et al. (GCN 6077). Using the SDSS data provided \nby Cool et al (GCN 6080), we calibrate the OT to the r band magnitude of \nthe star located at RA=197.89688 Dec=61.97785.  The approximate \nstatistical errors are 0.2 magnitudes.  We report the following \nmagnitudes for the OT:\n\ntime            ABC mag\n09:22:38.11 UT  mag= 20.3\n09:35:10.03 UT  mag= 20.3\n09:59:46.08 UT  mag= 20.9\n10:02:53.99 UT  mag= 20.8\n\n\nThe Rice University CCD Camera (RUCCD) on the AEOS telescope also\nobserved GRB 070208.  Ic-band images were taken between 2007-02-08\n09:49 UT and 10:35 UT.  The results are consistent with the Palomar\nobservations of Fox et al. (GCN 6078).",
  "circularId": 6090,
  "createdOn": 1171050980000,
  "email": "hflewell@umich.edu",
  "subject": "GRB 070208: MARGE Optical Observations",
  "submitter": "Heather Swan at U.of Michigan/ROTSE  <hflewell@umich.edu>",
  "eventId": "GRB 070208"
}