{
"subject": "GRB070309: Swift/XRT possible afterglow detection",
"bibcode": "2007GCN..6187....1V",
"createdOn": 1173485675000,
"circularId": 6187,
"submitter": "Pat Romano at OAB-Swift ",
"email": "patrizia.romano@brera.inaf.it",
"body": "S.D. Vergani (Dunsink observatory-DIAS, DCU),\nP. Romano (INAF-OAB, Univ. Bicocca),\nC. Guidorzi (INAF-OAB, Univ. Bicocca) report on behalf\nof the Swift-XRT team:\n\nWe have analyzed the Swift XRT data from the first 11ks observations\nof INTEGRAL GRB 070309 (Paizis, et al. 2007, GCN Circ. 6182).\nInside the INTEGRAL error circle we find one source at the position\n\nRA(J2000) = 17h 34m 39.1s\nDec(J2000) = -37d 55' 48.2\"\n\nwith an estimated error radius of ~5 arcsec (90% confidence).\nThis is 81 arcseconds from the INTEGRAL position.\nThe source has a count rate of (2.0+-0.6)E-3 counts/s and, assuming\na crab spectrum, a flux of 5E-14 erg/cm2/s. We collected a total of\n15 counts. More data are being collected that will be used to determine\nwhether the source is fading and to perform a spectral analysis.\n\nThis Circular is an official product of the Swift XRT Team."
}