Maps of the Southern Millimeter-wave Sky from Combined 2500 deg^2 SPT-SZ and Planck Temperature Data

• Published in: The Astrophysical Journal Supplement Series
• Main Authors: Chown, R., Crites, A. T.
• Format: Article in Journal/Newspaper
• Language: English
• Published: American Astronomical Society 2018
• Subjects: South Pole; South pole
• Online Access: https://authors.library.caltech.edu/90883/; https://authors.library.caltech.edu/90883/1/Chown_2018_ApJS_239_10.pdf; https://authors.library.caltech.edu/90883/2/1803.10682.pdf; https://resolver.caltech.edu/CaltechAUTHORS:20181114-080031304

We present three maps of the millimeter-wave sky created by combining data from the South Pole Telescope (SPT) and the Planck satellite. We use data from the SPT-SZ survey, a survey of 2540 deg^2 of the the sky with arcminute resolution in three bands centered at 95, 150, and 220 GHz, and the full-mission Planck temperature data in the 100, 143, and 217 GHz bands. A linear combination of the SPT-SZ and Planck data is computed in spherical harmonic space, with weights derived from the noise of both instruments. This weighting scheme results in Planck data providing most of the large-angular-scale information in the combined maps, with the smaller-scale information coming from SPT-SZ data. A number of tests have been done on the maps. We find their angular power spectra to agree very well with theoretically predicted spectra and previously published results.