{
  "bibcode": "2010GCN.10562....1D",
  "body": "V. D'Elia and G. Stratta (ASDC) report on behalf of the Swift Team:\n\nSwift began a target of opportunity observation of the SuperAGILE detected\nGRB 100331B (Del Monte et al., GCN #10560), at 14:38UT on April 1st, 2010,\nabout 17.5 hours after the SuperAgile detection.\n\nWe have analysed 2.1 ks of XRT data, �from 63152 s to 69.7 ks after  \nthe� � � � BAT trigger.\nThe data are entirely in Photon Counting (PC) mode. Using 1839 s of PC\nmode data and 2 UVOT images, we find an enhanced XRT position (using\nthe XRT-UVOT alignment and matching UVOT field sources to the USNO-B1\ncatalogue): RA, Dec = 303.02160, -11.10810 which is equivalent to:\n\nRA (J2000): 20 12 5.18\nDec(J2000): -11 06 29.0\n\nwith an uncertainty of 2.0 arcsec (radius, 90% confidence). This�\nposition lies 3.2 arcmins from the SuperAGILE reported position. We�\ncurrently cannot confirm if this source is fading.\n\nThis circular is an official product of the Swift/XRT team.\n\n----------------------------------------------------------------\nThis message was sent using IMP, the Internet Messaging Program.",
  "circularId": 10562,
  "createdOn": 1270168692000,
  "email": "delia@asdc.asi.it",
  "subject": "GRB 100331B: Swift/XRT possible afterglow candidate",
  "submitter": "Valerio D'Elia at ASDC  <delia@asdc.asi.it>",
  "eventId": "GRB 100331B"
}