{
  "bibcode": "2011GCN.11864....1S",
  "body": "M.Sokolowski,T.Batsch,A.Majcher,A.Majczyna,K.Nawrocki,J.Uzycki,G.Wrochna (IPJ, 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  )\nobserved field of GRB 110402A at the time of Fermi-GMB and Swift-BAT triggers.\nNo new source brighter than 11 mag has been identified on 10s exposures:\n\nt_start - t0      start (UT)  end (UT)     3-sigma limit\n\n       -6           00:12:52    00:13:02     11.0\n       +7           00:13:05    00:13:15     11.0\n\nwhere limit is based on the reference star magnitudo in V filter.",
  "circularId": 11864,
  "createdOn": 1301739376000,
  "email": "wrochna@fuw.edu.pl",
  "subject": "GRB 110402A: early optical limit by \"Pi of the Sky\"",
  "submitter": "Grzegorz Wrochna at Soltan Inst.for Nuclear Studies  <wrochna@fuw.edu.pl>",
  "eventId": "GRB 110402A"
}