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quad [2026/08/18 11:00] – created dparadisquad [2026/08/18 12:28] (current) – dparadis
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 +====== QUaD Experiment ======
  
 +QUaD is a bolometer-based polarimeter optimized for CMB polarization measurements. QUaD is a 2.6 m Cassegrain radio telescope on the mount originally constructed for the DASI experiment. 
 +Two portions of the Galactic plane have been observed in the Galactic longitudes range 240° < l < 295° and 315° < l < 5°, for latitudes -4<b<+4°, corresponding to 800 square degree, at 100 and 150 GHz. 
 +
 +The angular resolution of the surveys is 5′ and 3.5′ at 100 and 150 GHz, respectively, in Stokes I, Q and U parameters. Units of the HEALPix maps are MJy/sr.
 +
 +HEALPix maps made by D. Paradis. 
 +
 +=== Reference ===
 +  * 'The QUaD Galactic Plane Survey 1: Maps And Analysis of Diffuse Emission' by T. Culverhouse et al., 2010, ApJ, 722, 1057,  https://ui.adsabs.harvard.edu/abs/2010ApJ...722.1057C/abstract
 +
 +=== Maps===
 +
 +__100 GHz__: \\
 +- Intensity: @@ENV:CADE_FILES_URL:/documents/Ancillary/QUaD/QUaD_I_100GHz_1_2048.fits|QUaD_I_100GHz_1_2048.fits@@
 +
 +- Stokes U: @@ENV:CADE_FILES_URL:/documents/Ancillary/QUaD/QUaD_U_100GHz_1_2048.fits|QUaD_U_100GHz_1_2048.fits@@
 +
 +- Stokes Q: @@ENV:CADE_FILES_URL:/documents/Ancillary/QUaD/QUaD_Q_100GHz_1_2048.fits|QUaD_Q_100GHz_1_2048.fits@@
 +
 +__150 GHz__: \\
 +- Intensity: @@ENV:CADE_FILES_URL:/documents/Ancillary/QUaD/QUaD_I_150GHz_1_4096.fits|QUaD_I_150GHz_1_4096.fits@@
 +
 +- Stokes U: @@ENV:CADE_FILES_URL:/documents/Ancillary/QUaD/QUaD_U_150GHz_1_4096.fits|QUaD_U_150GHz_1_4096.fits@@
 +
 +- Stokes Q: @@ENV:CADE_FILES_URL:/documents/Ancillary/QUaD/QUaD_Q_150GHz_1_4096.fits|QUaD_Q_150GHz_1_4096.fits@@
 +
 +=== Original WCS Data ===
 +
 +https://lambda.gsfc.nasa.gov/product/quad/quad_dec_2010_get.html
 +
 +=== Project Website ===
 +https://web.stanford.edu/~schurch/quad_instrument.html
  
  
-QUaD is a bolometer-based polarimeter optimized for CMB polarization measurements. The QUaD experiment comprises three main elements: the telescope, the mount and the receiver. The telescope was built by collaborators at the University of Cardiff, in Wales and the University of Chicago. The mount is located at the South Pole and was formerly occupied by the University of Chicago DASI experiment. The receiver was designed, built and tested here at Stanford, using detectors provided by the Jet Propulsion Laboratory.