{
  "bibcode": "1999GCN...362....1C",
  "body": "GRB 990704 optical observations\n-------------------------------\n\nAlberto. Castro-Tirado, LAEFF-INTA (Madrid) and IAA-CSIC (Granada)\nMaria Eva Alcoholado-Feltstrom, SMA (Malaga)\nMaria Marcha and Alessandro Caccianiga, University Observatory  (Lissabon)\nKarl Heinz Mack, Radioastronomisches Institut (Bonn)\nJochen Greiner, AIP (Potsdam)\nJavier Gorosabel, LAEFF-INTA (Madrid)\nMarco Feroci and Enrico Costa, IAS (Frascati)\n\nreport:\n\n\"We have obtained four 4-minute R-band exposures through a cloudy sky\nof the GRB 990407 error box (Piro et al. GCN 360) starting at 20:50 UT\non 4 July 1999 (3.33 hours after the trigger) with the 2.2 m telescope\nat the German-Spanish Calar Alto Observatory (CAHA). After a visual\ncomparison with the the Digital Sky Survey, no new sources were seen to\na limiting magnitude of R = 18 within the 8 arcmin radius error box.\nDeeper optical/IR observations are encouraged.\"\n\nThis message can be citted.",
  "circularId": 362,
  "createdOn": 931138094000,
  "email": "ajct@laeff.esa.es",
  "subject": "GRB990704",
  "submitter": "Alberto Castro-Tirado at LAEFF-INTA  <ajct@laeff.esa.es>",
  "eventId": "GRB 990704"
}