{
  "bibcode": "2023GCN.35366....1K",
  "submittedHow": "email",
  "subject": "GRB 231215A: Swift/UVOT Detection",
  "submitter": "Paul Kuin at MSSL <npkuin@gmail.com>",
  "createdOn": 1702679914933,
  "eventId": "GRB 231215A",
  "body": "N. P. M. Kuin (UCL-MSSL) and P. D'Avanzo (INAF-OAB)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 231215A\n2733 s after the BAT trigger (D'Avanzo et al., GCN Circ. 35343).\nA source consistent with the XRT position (Goad et al., GCN Circ. 35357)\nis detected in the initial UVOT exposures. The burst was also detected\nby Fermi GBM (GCN Circ. 35344),Astrosat CZTI (Navaneeth et al., GCN\nCirc. 35352), and in the optical by Master (Lipunov et al., 35347),\nMONDY (Pankov et al. GCN Circ. 35349), MITSume Akeno (Sasada et al.,\nGCN Circ. 35351), GROWTH-India (Wagh et al., GCN Circ 35354), BOOTES-4/MET\n(Hu et al., GCN Circ 35363), HMT-Nanshang (An et al. GCN Circ. 35353) and\nan upper limit from AKO (Odeh, GCN Circ. 36362).\n\nThe preliminary UVOT position is:\n    RA  (J2000) =  00:38:57.52 =   9.73967 (deg.)\n    Dec (J2000) = +57:38:50.5  =  57.64735 (deg.)\nwith an estimated uncertainty of 0.45 arc sec. (radius, 90% confidence).\n\nPreliminary detections and 3-sigma upper limits using the UVOT photometric\nsystem\n(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures\nare:\n\nFilter         T_start(s)   T_stop(s)      Exp(s)           Mag\n\nwhite             2733         2883          147         18.10 +/- 0.05\nv                 3713         3912          197         17.48 +/- 0.08\nb                 3096         3296          197         18.63 +/- 0.09\nu                 2891         3091          197         18.17 +/- 0.10\nw1                4124         4323          197         19.57 +/- 0.31\nm2                3918         4117          197        >19.4\nw2                3507         3707          197        >19.5\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.506 in the direction of the burst\n(Schlegel et al. 1998).\n",
  "circularId": 35366
}