Astronomy and Astrophysics – Astrophysics – Instrumentation and Methods for Astrophysics
Scientific paper
2009-04-08
Astrophys.J.707:1723-1728, 2009
Astronomy and Astrophysics
Astrophysics
Instrumentation and Methods for Astrophysics
Accepted for publication in the Astrophysical Journal. Maps available at http://blastexperiment.info/
Scientific paper
10.1088/0004-637X/707/2/1723
The Balloon-borne Large Aperture Submillimeter Telescope (BLAST) operated successfully during a 250-hour flight over Antarctica in December 2006 (BLAST06). As part of the calibration and pointing procedures, the red hypergiant star VY CMa was observed and used as the primary calibrator. Details of the overall BLAST06 calibration procedure are discussed. The 1-sigma absolute calibration is accurate to 10, 12, and 13% at the 250, 350, and 500 micron bands, respectively. The errors are highly correlated between bands resulting in much lower error for the derived shape of the 250-500 micron continuum. The overall pointing error is <5" rms for the 36, 42, and 60" beams. The performance of the optics and pointing systems is discussed.
Ade Peter A. R.
Bock James Joseph
Chapin Edward L.
Devlin Mark J.
Dicker Simon R.
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