{
  "bibcode": "2013GCN.15393....1C",
  "body": "J. R. Cummings and Valerio D'Elia on behalf of the Swift science team\n\nSwift-BAT trigger 575905 (Cenko et al., GCN 15384) is probably due to a\nfluctuation in the image domain, not to any astrophysical source.  While\nthe BAT significance level (7.0 sigma) usually is high enough to indicate\na real source, in this case the peak in the image is not robust with\nrespect to very slight changes in parameters.\n\nThe total XRT exposure for this field is 15ks. The source number 2 reported\nin Izzo et al. (GCN 15388), that was uncatalogued but below the RASS limit,\nhas a bright star as optical counterpart. We thus conclude that source 2 is\nnot related to the BAT emission, and that the slight variability observed\nfor this object in the X-ray band is due to normal stellar activity.",
  "circularId": 15393,
  "createdOn": 1382981645000,
  "email": "james.r.cummings@nasa.gov",
  "subject": "Swift-BAT Trigger 575905 is probably not a real source",
  "submitter": "Jay R. Cummings at NASA/GSFC/Swift  <james.r.cummings@nasa.gov>"
}