Gamma-ray Burst 110812A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN Circular #12274
  E. Del Monte, I. Donnarumma, Y. Evangelista, M. Feroci, F. Lazzarotto, L. Pacciani, P. Soffitta, E. Costa, I. Lapshov, M. Rapisarda (INAF/IASF Rome), G. Barbiellini, F. Longo, E. Moretti (INFN Trieste), A. Bulgarelli, F. Gianotti, M. Trifoglio, G. Di Cocco, C. Labanti, F. Fuschino, M. Marisaldi, M. Galli (INAF/IASF Bologna), A. Giuliani, A. Chen, S. Mereghetti, F. Perotti, P. Caraveo (INAF/IASF Milan), M. Tavani, G. Pucella, V. Vittorini, A. Argan, A. Trois, M. Cardillo, G. Piano, S. Sabatini (INAF/IASF Rome), A. Pellizzoni, M. Pilia (INAF/OA Cagliari), S. Vercellone, F. D'Ammando (INAF/IASF Palermo), P. W. Cattaneo, A. Rappoldi (INFN Pavia), P. Picozza, A. Morselli, E. Striani, (INFN Roma-2), M. Prest, E. Vallazza (Universita` dell'Insubria), P. Lipari, D. Zanello (INFN Roma-1), P. Giommi, C. Pittori, F. Lucarelli, P. Santolamazza, F. Verrecchia (ASDC) and L. Salotti (ASI), on behalf of the AGILE Team, report:
  "SuperAGILE detected a gamma ray burst on 12 August 2011, at 00:20:08 UT. The event had a duration of about 30 s in the 20-60 keV energy range, with a multi peak structure. Assuming a crab-like energy spectrum, the peak flux on 1-s timescale was 8.91E-08 erg/cm2/s. The burst position was reconstructed as (RA, Dec) (358.409, 72.206) deg, which is:

    
  RA(J2000)  = 23h 53m 38.15s
  Dec(J2000) = 72d 12' 23.32"
    

  with an uncertainty of 3' radius. The given uncertainty accounts for both the statistical and systematic errors.
  An analysis of the AGILE Gamma Ray Imager (GRID) data is in progress."
  This message may be cited.
• GCN NOTICE
  

  TITLE:           GCN/SuperAGILE NOTICE
  NOTICE_DATE:     Fri 12 Aug 11 07:40:01 UT
  NOTICE_TYPE:     SuperAGILE GRB Ground Position
  TRIGGER_NUM:     0
  GRB_RA:          358.409d {+23h 53m 38s} (J2000),
                   358.552d {+23h 54m 13s} (current),
                   357.797d {+23h 51m 11s} (1950)
  GRB_DEC:         +72.206d {+72d 12' 22"} (J2000),
                   +72.271d {+72d 16' 14"} (current),
                   +71.928d {+71d 55' 40"} (1950)
  GRB_ERROR:       3.00 [arcmin radius, statistical plus systematic]
  GRB_INTEN:       162.695   147.115 [X & Y cnts]
  GRB_SIGNIF:      6.99  6.23 [sigma]
  GRB_DATE:        15785 TJD;   224 DOY;   11/08/12
  GRB_TIME:        1209.00 SOD {00:20:09.00} UT
  SUN_POSTN:       141.69d {+09h 26m 47s}  +15.04d {+15d 02' 29"}
  SUN_DIST:         89.32 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
  MOON_POSTN:      303.46d {+20h 13m 51s}  -16.47d {-16d 28' 18"}
  MOON_DIST:        95.91 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:      118.49,  9.83 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:       50.53, 61.28 [deg] ecliptic lon,lat of the burst (or transient)
  COMMENTS:        SuperAGILE GRB Coordinates.  
  COMMENTS:        This is a GRB.  
  COMMENTS:        SuperAGILE ground GRB coordinates  
  

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