{
  "bibcode": "2005GCN..3692....1B",
  "body": "S. Barthelmy (GSFC) and D. Palmer (LANL)\non behalf of the Swift-BAT team:\n\nThe Swift-BAT trigger (trigger=147918) at 06:31:44.34 UT on 27 July 2005\nis not due to a real GRB.  A retraction Notice was issued at 07:16:16 UT;\n45 min after the trigger (appended below in the full email format).\nWe note that the KAIT and RTT150 teams (GCN 3689 and 3691, resp)\nhave issued Circulars on this BAT trigger.  We apologize for the\ninconvenience to these, and any other follow-up observers on this trigger.\nIt will now be Swift-BAT policy to issue retraction Circulars\nin addition to the retraction Notices to insure the maximum possible\ndistribution of this information.\n\nAfter further analysis, we confirm that the cause of the incorrect\nBAT trigger was due to a momentary loss in the Star Tracker lock\nand that this incorrect spacecraft attitude information resulted\nin the point source found in the BAT image not matching the approrpriate\nsource in the BAT on-board catalog.\n\nS. Barthelmy (of GCN) further notes that the retraction Notice\nwas distributed to 228 recipients, whereas the original Notice\nwas distributed to 243 recipients.  The difference is due\nto those sites that have Trigger_ID enabled in their GCN configurations.\nSince the retraction Notice has the \"non-GRB\" flag set, the GCN filtering code\ndoes not send this Notice to sites with Trigger_ID filtering enabled.\nThe Retraction flag should override the non-GRB flag in these delayed\n(non-realtime) Notices that are paired with original Notices.\nThis is clearly a mistake in the design of the GCN filtering code\nand will be rectified soon.  We apologise for the inconvenience\nthis has caused on this 147918 trigger and the other retraction Notices\nthe Swift-BAT team has issued in the past.\n\n\nTITLE:           GCN/SWIFT NOTICE\nNOTICE_DATE:     Wed 27 Jul 05 07:16:16 UT\nNOTICE_TYPE:     Swift-BAT GRB Position RETRACTION\nTRIGGER_NUM:     147918,   Seg_Num: 0\nGRB_RA:          238.256d {+15h 53m 01s} (J2000),\n                 238.338d {+15h 53m 21s} (current),\n                 237.522d {+15h 50m 05s} (1950)\nGRB_DEC:         -21.768d {-21d 46' 04\"} (J2000),\n                 -21.784d {-21d 47' 02\"} (current),\n                 -21.620d {-21d 37' 11\"} (1950)\nGRB_ERROR:       4.00 [arcmin radius, statistical only]\nGRB_INTEN:       0 [cnts]    Image_Peak=1308 [image_cnts]\nTRIGGER_DUR:     64.000 [sec]\nTRIGGER_INDEX:   20000     E_range: 15-50 keV\nBKG_INTEN:       0 [cnts]\nBKG_TIME:        0.00 SOD {00:00:00.00} UT\nBKG_DUR:         0 [sec]\nGRB_DATE:        13578 TJD;   208 DOY;   05/07/27\nGRB_TIME:        23504.34 SOD {06:31:44.34} UT\nGRB_PHI:          57.31 [deg]\nGRB_THETA:        34.52 [deg]\nSOLN_STATUS:     0x33\nRATE_SIGNIF:     0.00 [sigma]\nIMAGE_SIGNIF:    7.98 [sigma]\nMERIT_PARAMS:     +1  +0  +0  +6  +1  -2  +0  +0 +44  +1 \nSUN_POSTN:       126.67d {+08h 26m 41s}  +19.17d {+19d 10' 27\"}\nSUN_DIST:        116.47 [deg]\nMOON_POSTN:       21.77d {+01h 27m 06s}   +9.68d {+09d 40' 47\"}\nMOON_DIST:       142.90 [deg]\nMOON_ILLUM:      59 [%]\nGAL_COORDS:      349.43, 24.29 [deg] galactic lon,lat of the burst (or transient)\nECL_COORDS:      240.74, -1.50 [deg] ecliptic lon,lat of the burst (or transient)\nCOMMENTS:        SWIFT-BAT GRB Coordinates.  \nCOMMENTS:        This is an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  \nCOMMENTS:        A point_source was found.  \nCOMMENTS:        This does not match any source in the on-board catalog.  \nCOMMENTS:        This does not match any source in the ground catalog.  \nCOMMENTS:        This is not a GRB.  \nCOMMENTS:        This is a RETRACTION of a previous notice that identified this as a GRB -- it is NOT a GRB.  \nCOMMENTS:        This Notice was ground-reprocessed from flight-data.  \nCOMMENTS:          \nCOMMENTS:        This is NOT a real GRN, nor is it a Transient.  \nCOMMENTS:        The s/c attitude information was not valid at the time of the trigger.  \nCOMMENTS:        So it is very likely this is a known source misidentified due to incorrect pointing information.",
  "circularId": 3692,
  "createdOn": 1122516637000,
  "email": "Scott@lheamail.gsfc.nasa.gov",
  "subject": "Swift-BAT trigger 147918 is not a real GRB",
  "submitter": "Scott Barthelmy at NASA/GSFC  <Scott@lheamail.gsfc.nasa.gov>"
}