{
  "subject": "GRB 040730: Optical observations",
  "editedOn": 1731923371710,
  "version": 2,
  "eventId": "GRB 040730",
  "bibcode": "2004GCN..2635....1G",
  "createdOn": 1091235267000,
  "editedBy": "Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Leo P. Singer at NASA/GSFC <leo.p.singer@nasa.gov>",
  "circularId": 2635,
  "submitter": "Javier Gorosabel at IAA-CSIC  <jgu@iaa.es>",
  "email": "jgu@iaa.es",
  "format": "text/plain",
  "body": "J. Gorosabel (IAA-CSIC), S. Eguchi (Univ. of Nagoya),\nA.J. Castro-Tirado (IAA-CSIC), A. de Ugarte Postigo (IAA-CSIC),\nP. Kilmartin (Univ. of Canterbury), P. Yock (Univ. of Auckland),\nM. Jelínek (IAA-CSIC) and J.M. Castro Cerón (STScI) report:\n\n\n\"We have acquired two set of images of the GRB 040730 error box, provided\nby INTEGRAL (Gotz et al. GCN 2634), with the 0.6 m telescope (+MOA camera)\nat the Mt. John Observatory. The observations were performed with the MOA\nbroad R band filter (similar to Ic); individual exposure times were 300 s.\nThe two sets are composed of three images each (Texp = 3 x 300 s), the\nfirst one taken on July 30.2992-30.3126 UT (t-to ~ 5.2 hr) and the second\none 30.5215-30.5349 UT (t-to ~ 10.7 hr). Visual comparison of the two\nepochs did not reveal variable sources brighter than Ic ~ 20. We note \nthe severe Galactic extinction in the GRB line of sight (A_I ~ 2.3 mag).\"\n\nThis message may be cited."
}