{
  "bibcode": "2000GCN...579....1C",
  "body": "Alberto J. Castro-Tirado, IAA-CSIC (Granada)\nHolger Bock, Landesternwarte (Heidelberg)\nJochen Greiner, AIP (Potsdam)\nSylvio Klose, TLS (Tautenburg)\nJose Maria Castro Ceron, ROA (San Fernando)\nFelipe Hoyo, CAHA (Almeria)\nJavier Gorosabel, DSRI (Copenhagen)\non behalf of a larger European GRB collaboration\n\n\nreport:\n\n\"We have just obtained a 15-minute R-band exposure centred at\nthe GRB 000301C error box (Smith et al. GCN#568) starting at\n01:15 UT on 4 March 2000 with the 1.23 m telescope at the\nGerman-Spanish Calar Alto Observatory (CAHA).\n\nUsing the stars A-D of Garnavich et al. (GCN #573) we derive\nR = 20.46 +/- 0.09 for the optical counterpart reported by Fynbo\net al. (GCN #570). When combining this value with the measurements\nby Fynbo et al. (GCN #576) and Halpern et al. (GCN #578) the\npower-law decline exponent becomes alpha = -1.27 +/- 0.20.\"\n\nThis message is quotable.\n\n[GCN OPS NOTE (03Mar00): The Felipe Hoyo author was added to the archive copy.]",
  "circularId": 579,
  "createdOn": 952138297000,
  "email": "ajct@iaa.es",
  "subject": "GRB 000301C R-band observation",
  "submitter": "Alberto Castro-Tirado at Inst.de Astro. de Andalucia  <ajct@iaa.es>",
  "eventId": "GRB 000301C"
}