{
  "bibcode": "2002GCN..1497....1B",
  "body": "F. Bertoldi (MPIfR Bonn), D.A. Frail (NRAO), A. Weiss (IRAM Granada),\nK.M. Menten (MPIfR Bonn), S. Kulkarni (Caltech), E. Berger (Caltech) \nreport:\n \nThe afterglow of GRB 020813 (Fox et al., GCN 1470) was observed \nat 250 GHz (1.2 mm) with the 37 channel Max-Planck Millimeter Bolometer\n(MAMBO) array (80 GHz bandwidth, 10.7 arcsec HPBW) at the IRAM 30 m\ntelescope on Pico Veleta (Spain), at the position reported by Rhoads\net al. (GCN 1474). \n\nThe observation dates, average elevations, 250 GHz zenith opacities,\non-sky integration time, and (1/rms^2 weighted) average flux densities\nare listed in the following table:\n\ndate    UT           EL   tau_z  t_int  flux [mJy]\n-----------------------------------------------------\nAug 13, 19:10-21:10  32d   0.50  2950s  1.45 +-1.15\nAug 14, 23:10-23:55  31d   0.39  1260s  1.08 +-1.39\n\n                         total:  4210s  1.30 +-0.89\n\nGiven the high line of sight opacity we were not able to detect\nthe GRB afterglow at sufficient significance.\nOur flux density limits are consistent with those found by Bremer\net al. (GCN 1487) at 232 GHz, -0.63 +-2.06 mJy. \n\nThis message may be quoted.",
  "circularId": 1497,
  "createdOn": 1029503375000,
  "email": "bertoldi@mpifr-bonn.mpg.de",
  "subject": "GRB020813 IRAM millimeter observations",
  "submitter": "Frank Bertoldi at MPIFR/Bonn  <bertoldi@mpifr-bonn.mpg.de>",
  "eventId": "GRB 020813"
}