TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  5300
SUBJECT: Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
DATE:    06/07/12 13:31:17 GMT
FROM:    Fabian Walter at MPIA  <walter@mpia.de>

F. Walter (MPIA Heidelberg), C. Carilli (NRAO), F. Bertoldi (AIfA Bonn), 
A. Weiss (MPIfR Bonn) report:

We observed the host galaxy of GRB 050904 (GCN 3910) at redshift z=6.29
(GCN 3937), RA 00:54:50.83, Dec +14:05:10 (J2000), with the
Max-Planck-Millimeter Bolometer (MAMBO-2) array at the IRAM 30-m telescope
on 27 February 2006 and 03 March 2006, and obtained a non-detection of

   S_nu(250 GHz,1.20mm) = -0.76 +/- 0.45 mJy  

(1 sigma error), i.e. a 3 sigma upper flux density limit of 1.35 mJy. The
MAMBO-2 bolometer detectors cover 210-290 GHz (half power). The host
galaxy of GRB 050904 is well within our 10.7 arcsec FWHM beam.

This message may be cited.