{
  "bibcode": "2012GCN.13202....1C",
  "body": "J. R. Cummings (GSFC/UMBC), C. B. Markwardt (GSFC), and\nT. Sakamoto (NASA/UMBC) on behalf of the Swift-BAT team\n\nThe BAT trigger# 519207 (Barthelmy et al, GCN Circ# 13190) has been\nidentified as due to a flare from Cyg X-1, not a GRB.  The maskweighted\nBAT lightcurve for Cyg X-1 shows a single symmetric pulse in the\n15-50 keV band, about 4 seconds long at the same time as the BAT\ntrigger.  The BAT triggered on the Cyg X-1 flare.  While the on-board\nprocessing ignores known bright sources, a portion of the Cyg X-1 flare\nappeared in a spatially separate side-lobe, which the BAT did\ntrigger on.",
  "circularId": 13202,
  "createdOn": 1333485171000,
  "email": "james.r.cummings@nasa.gov",
  "subject": "BAT trigger 519207 was a burst from Cyg X-1, was not GRB 120402A",
  "submitter": "Jay R. Cummings at NASA/GSFC/Swift  <james.r.cummings@nasa.gov>",
  "eventId": "GRB 120402A"
}