{
  "bibcode": "2000GCN...609....1H",
  "body": "J. Kemp & J. P. Halpern (Columbia U.) report on behalf of the MDM\nObservatory GRB follow-up team:\n\n\"We observed the entire IPN error box of GRB 000307 (Hurley et al. GCN\n#601) in the R band using the MDM 1.3m telescope starting on March 10.12\nUT, and again on March 11.12 UT.  One hour of exposure was obtained on\neach night in seeing of approximately 1\".4.  No new object is apparent\nabove the limit of the digitized POSS-II plate, and no variable object is\ndetected brighter than an approximate limiting magnitude of R = 21.7.  \nThese observations were severely affected by scattered light from the star\nBetelgeuse, which is only 0.6 degrees away, making precise photometry\ndifficult.  We also note that Galactic extinction in this direction is\nsignificant, with E(B-V) = 0.445 according to Schlegel et al. (1998),\ncorresponding to A_R = 1.19.\n\nThis message may be cited.\"",
  "circularId": 609,
  "createdOn": 952760931000,
  "email": "jonathan@astro.bio2.edu",
  "subject": "GRB 000307, Optical Observations",
  "submitter": "Jonathan Kemp at Biosphere 2 Ctr/Columbia U  <jonathan@astro.bio2.edu>",
  "eventId": "GRB 000307"
}