{
  "bibcode": "2000GCN...822....1L",
  "body": "D. Lazzati, S. Covino, D. Fugazza, G. Ghisellini (Oss. Astr. \nBrera) report:\n\n\"We have obtained Bessel B, V, R and I band observations, using \nthe FORS1 instrument at the VLT-UT1:\n\nThe radio/optical candidate (Berger et al., GCN 795; Price et \nal., GCN 796; see also GCN 798 and 799) is clearly detected in \nall our images with the following magnitudes:\n\nDate 2000 UT      Exp.(s)  Filter  Magnitude \n\nSept 28.224\t  2600     B       24.9 +/- 0.1\nSept 28.255       1500     V       24.6 +/- 0.1\nSept 28.273\t   900     R       24.23 +/- 0.15\nSept 28.284       1500     I       23.6 +/- 0.15\n\nThe photometry (still to be considered preliminar) has been \nperformed relative to the stars reported by Henden (GCN 800).\n\nComparison of the measured R and I magnitudes with the measurements\nreported by Price et al. (GCN 796) and Pedersen et al. (GCN 815)\ngive a time decay index:\n\n\tdelta_R=1.5 +/- 0.14\n\tdelta_I=1.6 +/- 0.35\n\nfully consistent with each other.\n\nBVRI spectrum, images and fit informations can be found at \nhttp://www.merate.mi.astro.it/~lazzati/GRB000911/\n\nWe thank the ESO VLT-UT1 service observing team.\n\nThis message is citable.\"",
  "circularId": 822,
  "createdOn": 970329161000,
  "email": "lazzati@merate.mi.astro.it",
  "subject": "GRB000911: optical VLT observations",
  "submitter": "Davide Lazzati at Osservatorio Astronomico di Brera  <lazzati@merate.mi.astro.it>",
  "eventId": "GRB 000911"
}