{
  "bibcode": "2005GCN..3052....1P",
  "body": "T. Poole (MSSL), C. Gronwall (PSU), A. Blustin (MSSL), P. Brown (PSU), S.\nRosen, K. McGowan, M. De Pasquale (MSSL), P. Boyd (GSFC/UMBC), S. Holland,\nM. Still (GSFC/USRA), W. Landsman (GSFC), S. Hunsberger (PSU), A. Breeveld\n(MSSL), P. Roming (PSU), K. Mason, P. Schady (MSSL), M. Ivanushkina (PSU),\nT. Kennedy, P. Smith, B. Hancock (MSSL), S. Koch (PSU), M. Carter, H.\nHuckle (MSSL),  P. Broos, J. Racusin (PSU), E. Fenimore (LANL),\nB. Zhang (UNLV), J. Nousek (PSU), N. Gehrels (GSFC), on behalf of the\nSwift UVOT team.\n\nCORRECTION: The time at which the UVOT began observations of GRB050219b \nshould read as 21:57:51 in GCN 3046 and GCN 3050. This was 52 minutes \nafter the initial Swift BAT trigger (Cummings et al, GCN 3044), the delay \nbeing caused by the Earth-limb constraint.\n\nNo new source was detected at the corrected XRT position (Racusin et al, \nGCN 3049), and the 3-sigma limiting magnitudes given in GCN 3050 still \napply:\n\nFilter\tLim_Mag  Tot_Exposure(s)   T_start (s)\n  UVW2\t~ 22.16\t\t1154\t     T+3120\n  UVM2\t~ 22.24\t\t1435\t     T+3243\n  UVW1\t~ 22.23   \t940\t     T+3349\n  U\t~ 20.74   \t100\t     T+3455\n  B\t~ 20.9    \t100\t     T+3561\n  V\t~ 19.41   \t100\t     T+3136\n\nWe caution that the instrument is not yet fully calibrated and that the\nmagnitude limits presented here may need to be refined.",
  "circularId": 3052,
  "createdOn": 1109018064000,
  "email": "ps@mssl.ucl.ac.uk",
  "subject": "GRB050219b: CORRECTION to time of UVOT observations",
  "submitter": "Patricia Schady at MSSL/Swift  <ps@mssl.ucl.ac.uk>",
  "eventId": "GRB 050219B"
}