{
  "bibcode": "2011GCN.11763....1S",
  "body": "M.Sokolowski,T.Batsch,A.Majcher,A.Majczyna,K.Nawrocki,J.Uzycki,G.Wrochna (SINS, Swierk),\nM.Cwiok,W.Dominik,L.W.Piotrowski,A.F.Zarnecki (University of Warsaw),\nK.Malek,L.Mankiewicz,R.Opiela,M.Siudek,V.Repei (CFT PAN),\nG.Kasprowicz,M.Zaremba (Warsaw University of Technology),\nfrom the \"Pi of the Sky\" collaboration ( http://grb.fuw.edu.pl ).\nM. Jelinek and A. J.Castro-Tirado (IAA-CSIC Granada) on behalf of a larger collaboration.\n\nThe wide field \"Pi of the Sky North\" apparatus installed in the BOOTES-1\nstation at ESAt/INTA-CEDEA in Mazagon (Huelva, Spain; \nhttp://grb.fuw.edu.pl/pi/index.html#piinta_site.htm )\nstarted observing position of GRB 110223A 25 seconds after BAT trigger,\n165 seconds after the burst. No new source has been identified on 10s exposures\nnor on the sums of images corresponding to 50s exposure. \nFollowing limits were obtained:\n\nt_start - t0      start (UT)  end (UT)     3-sigma limit\n\n    165            20:59:44  - 20:59:54        11.0\n\n    165            20:59:44  - 21:00:45        12.0\n\n\nwhere limits are based on the reference star magnitudo in V filter.",
  "circularId": 11763,
  "createdOn": 1298546691000,
  "email": "marcin.sokolowski@fuw.edu.pl",
  "subject": "GRB 110223A :  early optical limit by \"Pi of the Sky\"",
  "submitter": "Marcin Sokolowski at Soltan Inst. Nuc Studies,Warsaw  <marcin.sokolowski@fuw.edu.pl>",
  "eventId": "GRB 110223A"
}