{
  "bibcode": "2006GCN..5604....1C",
  "body": "Stefano Covino (INAF/OABr), Daniele Malesani (SISSA/ISAS), and Gianpiero \nTagliaferri (INAF/OABr), report on behalf of the MISTICI collaboration:\n\nWe imaged the field of GRB 060923C (Stamatikos et al., GCN 5591) on 2006 \nSep 24 from 3:39 to 4:16 UT with the ESO VLT+ISAAC in the J band under \ngood seeing conditions.\n\nWithin the refined XRT error circle (Perri et al., GCN 5601) we detect \nthree sources with the following positions (RA, DEC, J2000) and magnitudes:\n\n    A:    23:04:28.40, +03:55:29.1    19.23 +- 0.03\n    B:    23:04:28.31, +03:55:29.0    22.87 +- 0.12\n    C:    23:04:28.18, +03:55:28.5    21.33 +- 0.07\n\nSource C could be extended. Absolute magnitudes are calibrated with \nrespect to two 2MASS stars in the field. The reported errors are only \nstatistical; the absolute calibration error may be of the order of ~0.15 \nmag. At this stage, we cannot say whether any of these sources is \nrelated to GRB 060923C. A finding chart is posted at the followin URL:\n\nhttp://www.sissa.it/~malesani/GRB/060923C/finder_ISAAC.jpg\n\nSource A has been reported by Rau et al. (GCN 5598) and could also be \nmarginally visible in the DSS.\n\nWe acknowledge support from the ESO observing staff at Paranal, in \nparticular Christophe Dumas and Emmanuel Jehin.\n\nThis message may be cited.",
  "circularId": 5604,
  "createdOn": 1159121513000,
  "email": "malesani@sissa.it",
  "subject": "GRB 060923C: VLT J-band observations",
  "submitter": "Daniele Malesani at SISSA-ISAS,Trieste,Italy  <malesani@sissa.it>",
  "eventId": "GRB 060923C"
}