{
  "bibcode": "2008GCN..7642....1O",
  "body": "S.R. Oates (UCL-MSSL) and H. Ziaeepour (UCL-MSSL) report on behalf of\nthe Swift/UVOT team.\n\nThe Swift/UVOT began settled observations the field of GRB 080426\n(trigger 310219) 226 seconds after the BAT trigger (Ziaeepour, et al.,\nGCN Circ. 7639). No afterglow is detected at the enhanced XRT position\n(Beardmore, et al., GCN Circ. 7641) in any of the UVOT filters. The 3 \nsigma upper limits are given below:\n\nFilter   T_start  T_stop    Exp.    Mag UL (3sig)\n            (s)    (s)\n------------------------------------------------\nwhite      226     326       98        >20.38\nwhite      446     7457     362        >20.86\nv          333     7868    1316        >19.98\nb          431     7253     303        >20.01\nu          407     7047     333        >19.79\nuvw1       382     6843     352        >19.99\nuvm2       357     7969     407        >19.94\nuvw2       462     7663     510        >20.26\n-------------------------------------------------\n\nThese upper limits are not corrected for the Galactic extinction in\nthe line of sight, corresponding to a reddening of E(B-V)= 0.798 mag\n(Schlegel et al., 1998, ApJS, 500, 525). The photometry is based on\nthe UVOT photometric system described in Poole et al. (2008, MNRAS, 383, \n627).",
  "circularId": 7642,
  "createdOn": 1209242274000,
  "email": "sro@mssl.ucl.ac.uk",
  "subject": "GRB080426: Swift/UVOT upper limits",
  "submitter": "Samantha Oates at MSSL  <sro@mssl.ucl.ac.uk>",
  "eventId": "GRB 080426"
}