{
  "bibcode": "2012GCN.13114....1K",
  "body": "N. P. M. Kuin (MSSL-UCL), S. Holland (STScI), and M. H. Siegel (PSU)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 120326A\n67 s after the BAT trigger (Siegel et al., GCN Circ. 13105).\nA source consistent with the XRT position (Goad et al., GCN Circ. 13110\nis detected in the initial UVOT exposures at position: RA (J2000)\n= 18:15:37.13, Dec (J2000) = +69:15:35.36 or, in decimal degrees:\n273.90471, 69.259822 with an uncertainty of 0.5\" (90 % confidence).\n\nThe transient was initially increasing in brightness, and after a small\ndecay rebrightened around 10ks after the trigger. There is also some\nindication of colour dependence of the time of rebrightening.\n\nThe detection in the UVOT uvw2 filter gives an upper limit for the\nredshift of about z < 1.6 for this burst.\n\nPreliminary detections and 3-sigma upper limits using the UVOT\nphotometric system\n(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are:\n\nFilter         T_start(s)   T_stop(s)      Exp(s)           Mag\n\nwhite_FC            67          217          147        >20.0\nwhite             3903         4103          197         20.16 +/- 0.12\nv                 4314         5949          393        >19.3\nb                 3697         5334          393         20.23 +/- 0.16\nu                 4929         5128          197         19.66 +/- 0.20\nm2                4518        16222         1228        >21.2\nw2                4109         5744          393        >21.0\nw1                9527        10427          886         20.21 +/- 0.18\nv                21959        22259          295         18.67 +/- 0.12\nw2               21052        21952          886         21.26 +/- 0.32\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.05 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 13114,
  "createdOn": 1332768082000,
  "email": "npkuin@gmail.com",
  "subject": "GRB 120326A: Swift/UVOT Detection",
  "submitter": "Paul Kuin at MSSL  <npkuin@gmail.com>",
  "eventId": "GRB 120326A"
}