{
  "bibcode": "2008GCN..7638....1P",
  "body": "K.L. Page (U. Leicester) and N. Gehrels (NASA/GSFC) report on behalf of \nthe Swift-XRT team:\n\nSwift-XRT performed follow-up observations of the possible GRB 080315 (BAT \ntrigger number 306323) about a month after the trigger, in order to \ndetermine whether or not the possible X-ray afterglow mentioned in GCN \nCirc. 7420 had faded. We find that this source is at a count rate \nconsistent with that of our original observation, so conclude that it is \nnot the afterglow. Thus, no afterglow was detected for this trigger.\n\nExcluding this constant X-ray source, the 3-sigma upper limit within the \nBAT error circle from the observation directly following the trigger (25 \nks on 2008-03-15) was 5.9 x 10^-4 count s^-1; the late-time data (30 ks \nbetween 2008-04-16 and 2008-04-21) provide a limit of 5.2 x 10^-4 count \ns^-1. \n\nWe cannot rule out that this was a real burst, but given the lack of XRT \ndetection and marginal BAT detection it is not likely.",
  "circularId": 7638,
  "createdOn": 1208870913000,
  "email": "kpa@star.le.ac.uk",
  "subject": "Possible GRB 080315: XRT non-detection of afterglow",
  "submitter": "Kim Page at U.of Leicester  <kpa@star.le.ac.uk>",
  "eventId": "GRB 080315"
}