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p of the Sky

Outburst of CN Leo flare star automaticaly detected by „ p of the Sky” The star has brighten 100 × in seconds, then faded in minutes t o = 2005.04.02 1:13:42 UT = 3462.55620 HJD. p of the Sky. Study of astrophysical phenomena with time scale from seconds to months

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p of the Sky

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  1. Outburst of CN Leo flare star automaticaly detected by „p of the Sky”The star has brighten 100× in seconds, then faded in minutes to = 2005.04.02 1:13:42 UT = 3462.55620 HJD pof the Sky Study of astrophysical phenomena with time scale from seconds to months Search for optical counterparts of Gamma Ray Bursts (GRB) http://grb.fuw.edu.pl Las Campanas Observatory (Chile) Apparatus tested in Poland • Soltan Institute for Nuclear Studies: J.Mrowca-Ciułacz, K.Nawrocki, P.Sitek, M.Sokołowski, G.Wrochna • Center for Theoretical Physics, Polish Academy of Sciences: A.Majcher,L.Mankiewicz • Institute of Experimantal Physics, Warsaw University: M.Ćwiok, H.Czyrkowski, R.Dąbrowski, W.Dominik, L.W.Piotrowski, A.F.Żarnecki • Institute of Electronics Systems, Warsaw Univ. of Technology: K.Poźniak, R.Romaniuk, G.Kasprowicz, S.Stankiewicz • Faculty of Physics, Warsaw Univ. of Technology: M.Molak, J.Użycki • Faculty of Science, Card. Wyszyński University: K.Małek • In collaboration the ASAS project – Astronomical Observatory of Warsaw University: G.Pojmański, B.Pilecki, D.Szczygieł • Special thanks to prof. B.Paczyński (Princeton University) and all staff of the Las Campanas Observatory • FIRST RESULTS • Search for optical flashes: • ~100 flashes <10s detectedflashing satellites • 8 flashes >10s detected including flare of CN Leo • Gamma Ray Bursts (GRB) • energy: 1051 erg = 109 years of Sun life • duration: 0.01-100s • distance: up to 14·109 light years (z=6.3) • frequecy: 2-3/day (2-3/week currently observed by satellites) • origin: • hipernova – massive star collaps to a black hole? • merging two neutron stars into a black hole? • „p of the Sky” APPARATUS • Prototype (working at LCO since 07.2004): • 2 CCD cameras, 2000x2000 piksels each • lenses: Zeiss, f=50mm, f/d=1.4, FoV: 33o×33o • limiting mag.: 10-11m (1 frame 10s), 12-13m (20 frames) • Apparatus under construction: • 2×16 CCD cameras, 2000x2000 piksels • lenses: Canon EF f=85mm, f/d=1.2 • FoV: 16 ×20o×20o = 2 steradians = Swift BAT FoV • limiting mag.: 12m (1 frame 10s), 14m (20 frames) • Robotic system: • The system works autonomously, according to scheuldewhich could be chaged via internet: • follows Swift, HETE or Integral FoV • independently detects optical flashes in real time • twice a night makes full sky survey (2×20min) • follows satellite alerts distributed by GCN • Data analysis: • 20000 stars / frame • 3000 frames = 25 GB / night / frame • on-line optical flash recognition - algorithms inspired by particle physics - rejection of cosmic rays, planes, satellites • data base of light curves of stars - off-line • Serch for GRB optical counterparts: • 96 GCN alerts received (>7.2004):1 – apparatus off 4 – clouds 27 – below horizon 45 – daytime 17 – outside FoV2 – inside FoV • limits 9m-12m published for GRB: 040825A, 040916, 041217, 050123, 050326, 050412, 050607, 060607 Poster background: Milky Way picture in false colors taken by „p of the Sky” camera

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