{
  "bibcode": "2005GCN..3069....1B",
  "body": "P. Brown (PSU), S. Rosen, K. McGowan, M. De Pasquale (MSSL), P. Boyd \n(GSFC/UMBC), S. T. Holland, M. Still (GSFC/USRA), W. Landsman (GSFC), S. \nHunsberger (PSU), A. Breeveld (MSSL), P. Roming (PSU), K. Mason, P. Schady \n(MSSL), M. Ivanushkina (PSU), T. Poole (MSSL), C. Gronwall (PSU), A. \nBlustin (MSSL), S. Koch (PSU), M. Carter, H. Huckle (MSSL),  P. Broos \n(PSU), T. Kennedy, P. Smith, B. Hancock (MSSL), M. Chester (PSU), B. Zhang \n(UNLV), J. Nousek (PSU), N. Gehrels (GSFC), on behalf of the Swift UVOT team.\n\n\nThe Swift Ultra-Violet/Optical Telescope (UVOT) observed the field of the \nX-ray flash GRB050215B (GCN 3024) between February 25, 2005 and February \n28, 2005 UT.  The 5-sigma limiting magnitudes for each exposure are \npresented below.  We stress that the limiting magnitudes are based on \nground calibrations and are uncertain by approximately +/-0.5 mag.\n\n#                       Exposure\n#   Date (UTC) Time     Time (s)  Filter   Mag\n  2005-02-25  15:13:13   1670.52     V     22.2\n  2005-02-25  19:52:34   2189.47     B     23.0\n  2005-02-25  21:32:35   2068.95     U     22.7\n  2005-02-25  23:27:38    985.24     V     21.9\n  2005-02-26  02:34:31   1351.94     V     22.0\n  2005-02-27  15:20:04   2099.11     B     22.9\n  2005-02-28  01:07:03   1620.44     V     22.2\n  2005-02-28  10:40:04   1919.99     B     22.9\n\nWe find no evidence for a brightening source, such as a supernova \ncomponent, at the location of the afterglow seen by UKIRT (GCN 3031).",
  "circularId": 3069,
  "createdOn": 1109881051000,
  "email": "roming@astro.psu.edu",
  "subject": "GRB050215B: Late-Time Swift UVOT Observations",
  "submitter": "Pete Roming at PSU  <roming@astro.psu.edu>",
  "eventId": "GRB 050215B"
}