{
  "bibcode": "2005GCN..3095....1R",
  "body": "S. Rosen, K. McGowan, M. De Pasquale (MSSL), P. Boyd (GSFC/UMBC),\nS. T.  Holland, M. Still (GSFC/USRA), W. Landsman (GSFC),\nS. Hunsberger (PSU), A.  Breeveld (MSSL), P. Roming (PSU), K. Mason,\nP. Schady (MSSL), M.  Ivanushkina (PSU), T. Poole (MSSL), C. Gronwall\n(PSU), A. Blustin (MSSL), P. Brown, S. Koch (PSU), M. Carter,\nH. Huckle (MSSL), P. Broos (PSU), T.  Kennedy, P. Smith, B. Hancock\n(MSSL), A. Parsons (GSFC), J. Nousek (PSU), N. Gehrels (GSFC), on\nbehalf of the Swift UVOT team.\n\n     The Swift Ultra-Violet/Optical Telescope (UVOT) began observing\nthe field of GRB 050315 (GCN 3094) at 21:01:13 UT, approximately 90\nseconds after the BAT trigger.  The first image was sent down via the\nTDRSS link approximately 200 seconds after the trigger.  This image\nwas a 100 second exposure taken with the V filter.  It was centred on\nthe BAT position, and had a size of 5 x 5 arcminutes, which covered\n88% of the BAT error circle.  The middle of the exposure was 140.19\nseconds after the BAT trigger.  The image was binned 8 x 8 to reduce\nthe bandwidth required for transmission.  A comparison against the DSS\nshowed no new sources down to a 5-sigma limiting magnitude of\napproximately V = 18.5.  We stress that this limiting magnitude is\nbased on ground calibrations and may be uncertain by approximately 0.5\nmag.  The full-resolution version of this image will be transmitted to\nthe ground during the next Malindi pass, which will occur at\napproximately 0000 UTC March 16, 2005.",
  "circularId": 3095,
  "createdOn": 1110930135000,
  "email": "sholland@milkyway.gsfc.nasa.gov",
  "subject": "GRB 050315: Early Observations with Swift/UVOT",
  "submitter": "Stephen Holland at USRA/NASA/GSFC/SSC  <sholland@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 050315"
}