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GCN Circular 3091

GRB050306: 250 GHz upper limit with MAMBO at the IRAM 30m
2005-03-12T23:05:51Z (19 years ago)
Frank Bertoldi at MPIFR/Bonn <>
F. Bertoldi (RAIUB Bonn), D.A. Frail (NRAO), A. Weiss (IRAM), 
K.M. Menten (MPIfR Bonn), S. Kulkarni (Caltech), A. Soderberg
(Caltech) report:

We observed the position initially reported for the GRB 050306
X-ray afterglow by Perri et al. (GCN 3075), RA 18:49:14.0, Dec
-09:09:10.4 (J2000), with the Max-Planck-Millimeter Bolometer
(MAMBO-2) array at the IRAM 30-m telescope on

   8 March 2005,  between UT 8 and 9 h,

and obtained a non-detection of

   S_nu(250 GHz,1.20mm) = 0.26 +/- 0.55 mJy  

(1 sigma error). The MAMBO-2 bolometer detectors cover 210-290
GHz (half power). The likely optical afterglow reported by
D'Avanzo et al. (GCN 3089) is 1.9 arcsec from our pointing
position, and well within our 10.7 arcsec FWHM beam.
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