We present a method of cross-calibrating the polarization angle of a polarimeter using Bicep Galactic observations. Bicep was a ground based experiment using an array of 49 pairs of polarization sensitive bolometers observing from the geographic South Pole at 100 and 150 GHz. The Bicep polarimeter is calibrated to ±0.01 in cross-polarization and less than ±0.7° in absolute polarization orientation. Bicep observed the temperature and polarization of the Galactic plane (R.A = 100° ~ 270° and Dec. = -67° ~ -48°). We show that the statistical error in the 100 GHz Bicep Galaxy map can constrain the polarization angle offset of Wmap W band to 0.6° ± 1.4°. The expected 1σ errors on the polarization angle cross-calibration for Planck or EPIC are 1.3° and 0.3° at 100 and 150 GHz, respectively. We also discuss the expected improvement of the Bicep Galactic field observations with forthcoming Bicep2 and Keck observations.
|Original language||English (US)|
|Title of host publication||Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V|
|State||Published - 2010|
|Event||Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V - San Diego, CA, United States|
Duration: Jun 29 2010 → Jul 2 2010
|Name||Proceedings of SPIE - The International Society for Optical Engineering|
|Conference||Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V|
|City||San Diego, CA|
|Period||6/29/10 → 7/2/10|
Copyright 2010 Elsevier B.V., All rights reserved.
- calibration source
- cosmic microwave background polarization
- millimeter wave
- polarization calibration
- polarized galactic emission