{
  "bibcode": "1999GCN...423....1T",
  "body": "J. Thorstensen (Dartmouth), R. Uglesich, J. Halpern, N. Mirabal\n(Columbia U.), E. Costa, M. Feroci, L. Piro (IAS/CNR, Rome)\nreport on behalf of the MDM Observatory GRB follow-up team\nand the BeppoSAX team:\n\n\"We imaged the field of GRB 991014 in the R band starting on\nOct. 15.38 UT, 11.2 hours after the burst, using the MDM \nObservatory's 1.3m and 2.4m telescopes.  The entire 6' radius \nerror circle from the BeppoSAX WFC (Gandolfi, GCN #417) was covered\nat the 1.3m, and the entire 2' radius NFI error circle of a possible\nX-ray afterglow (BeppoSAX MAIL n. 99/28) was covered at the 2.4m.\nThere was no new object brighter than the digitized POSS-II limit in \nthe WFC error circle.\n\nWe reobserved the NFI error circle on the 2.4m on Oct. 16.42 UT.\nSeeing was 1.1-1.2 arcseconds on both nights, and the 5 sigma\nlimiting magnitude was R = 23.1.  No variable object was detected\nin the NFI error circle.  This magnitude limit is referenced to a\nUSNO star at position (J2000) RA 06:51:03.17, Dec +11:36:42.6 which\nhas R = 17.61 +/- 0.02 according to the recent calibration of\nHenden et al. (GCN #422).\n\nThis message may be cited.\"",
  "circularId": 423,
  "createdOn": 940082234000,
  "email": "jules@astro.columbia.edu",
  "subject": "GRB 991014, Optical Observations",
  "submitter": "Jules Halpern at Columbia U.  <jules@astro.columbia.edu>",
  "eventId": "GRB 991014"
}