{
  "bibcode": "2005GCN..3997....1G",
  "body": "D. Grupe (PSU), H. Krimm (GSFC/USRA), P. Roming (PSU), P. Brown (PSU),\nD. Burrows (PSU), J. Kennea (PSU), D. Palmer (LANL), A. Parsons (GSFC)\non behalf of the Swift team:\n\nUsing the full BAT data from the recent telemetry downlink, the Swift-BAT\ntrigger 155535 (at 13:19:00 UT on 17 September 2005) is not due to a GRB.\nThis was a cascade shower event from a high energy cosmic ray in the \nspacecraft.\n\nThe XRT started to observe the field of trigger #155535 175 s after \nthe trigger.\nThe field was observed for 618 s in PC mode, but XRT did not detect any source.\n\nThe UVOT began observing the position of trigger #155535 at 13:20:19.2 UT, 80 s\nafter the BAT trigger. In the 100 s V-band image, no new source is detected\nwith respect to the DSS. The estimated extinction in this direction is\nA_V ~0.5 magnitudes. The UVOT image gives 100% coverage of the BAT \nerror circle.\nThe BAT source is located in a crowded star field.",
  "circularId": 3997,
  "createdOn": 1126971966000,
  "email": "krimm@milkyway.gsfc.nasa.gov",
  "subject": "Swift-BAT trigger 155535 is definitely not a GRB",
  "submitter": "Hans Krimm at NASA-GSFC  <krimm@milkyway.gsfc.nasa.gov>"
}