{
  "bibcode": "2006GCN..5509....1D",
  "body": "A. de Ugarte Postigo, F. Aceituno, A.J. Castro-Tirado\n(IAA-CSIC Granada), P. Kubanek (ASU AV CR ndrejov & \nISDC Versoix) on behalf of a larger collaboration report:\n\n\"The 0.6m BOOTES-IR and 1.5m telescope, located at IAA-CSIC \nObservatorio de Sierra  Nevada in Granada (Spain), observed the \nSWIFT error box for GRB 060904B (Grupe et al. GCN 5505) starting at\n02:38:30 UT observing in I & R-bands. We clearly detect the optical\ncounterpart reported by Rykoff et al. (GCN 5504), at coordinates J2000\n(+/-0.5\"):\n\n03:52:50.54 -00:43:30.5\n\n>From 02:38:30 to 02:48:35 UT the object has declined in 0.66 +/- 0.17 \nmagnitudes.\n\nThis message is quotable.\"\n\n[GCN OPS NOTE(04sep06): Per author's request, the 'B' was added.]",
  "circularId": 5509,
  "createdOn": 1157344098000,
  "email": "deugarte@iaa.es",
  "subject": "GRB 060904B BOOTES-IR and 1.5m OSN observations",
  "submitter": "Antonio Deugarte at IAA-CSIC  <deugarte@iaa.es>",
  "eventId": "GRB 060904B"
}