{
  "bibcode": "2007GCN..6281....1M",
  "body": "Daniele Malesani (DARK/NBI) and Helene Uthas (NOT) report on behalf of a\nlarger collaboration:\n\nWe observed again the field of GRB 070412 (Romano et al., GCN 6273) with\nthe NOT. Observations were carried out at two epochs, ~0.9 and ~3.5 hr\nafter the GRB. R- and I-band images were secured at each epoch.\n\nInside the XRT error circle, we do not detect the sources reported by\nJelinek et al. (GCN 6279) and Berger (GCN 6280). The 3-sigma limiting\nmagnitudes are:\n\nt-t0     I limit   R limit\n--------------------------\n0.9 hr   22.9      24.0\n3.5 hr   23.1      24.2\n\nThese numbers were computed assuming R = 17.38 and I = 17.17 for the USNO\nstar at RA = 12:06:02.17, Dec = +40:09:01.4. We note that the magnitude\nreported by Berger (GCN 6280) is fainter than our limits. Our early\nmeasurement implies a decay shallower than ~t^-0.7.\n\nThe object reported by Malesani & Uthas (GCN 6276) is detected only in the\nfirst R-band image, thus leaving open the possibility that this source was\nfading. However, we caution about the low significance of this detection.",
  "circularId": 6281,
  "createdOn": 1176368516000,
  "email": "malesani@astro.ku.dk",
  "subject": "GRB 070412: further NOT observations",
  "submitter": "Daniele Malesani at Niels Bohr Inst,Dark Cosmology Center  <malesani@astro.ku.dk>",
  "eventId": "GRB 070412"
}