{
  "bibcode": "2008GCN..7312....1B",
  "body": "A.P. Beardmore, K.L. Page (U. Leicester), H. Ziaeepour and M. de Pasquale\n(MSSL/UCL) report on behalf of the Swift team:\n\nAt 2008-02-12 16:42:52UT the Swift-XRT started a TOO observation of the \nIPN burst GRB 080211 (Hurley et al., GCN Circ. 7295), some 33.3 hours \nafter the trigger. The observation lasted only 656 s, at which point it \nwas terminated by the Swift discovery of GRB 080212 (Ziaeepour et al., GCN \nCirc. 7296).\n\nThe photon counting mode image accumulated during this time shows no \nevidence for a source in the XRT field of view, though only ~3/4 of the \nIPN error box was sampled. The 3 sigma limiting count rate for a point \nsource in the XRT image is 0.009 count s^-1, which corresponds to a \n0.3-10.0 keV flux limit of 5e-13 erg cm^-2 s^-1 (assuming a power-law \nspectrum of photon index 2 absorbed by the Galactic column density of \n7.8e21 cm^-2 in the direction of the burst).\n\nThe IPN field was also observed by the Swift-UVOT in the UW1 filter only, \nfor an exposure of 646 s. The 3 sigma upper limit is UW1 > 20.3. We note \nthat the background in this field is very noisy and the extinction is \nhighly variable throughout the field due to the presence of gas and dust \nvisible in DSS images.\n\nThis circular is an official product of the Swift-XRT and UVOT teams.",
  "circularId": 7312,
  "createdOn": 1203019695000,
  "email": "apb@star.le.ac.uk",
  "subject": "Swift-XRT and UVOT observations of the IPN burst GRB 080211",
  "submitter": "Andy Beardmore at U Leicester  <apb@star.le.ac.uk>",
  "eventId": "GRB 080211"
}