Maps of the Magellanic Clouds from Combined South Pole Telescope and
  Planck Data
  We present maps of the Large and Small Magellanic Clouds from combined South
Pole Telescope (SPT) and Planck data. The Planck satellite observes in nine
bands, while the SPT data used in this work were taken with the three-band
SPT-SZ camera, The SPT-SZ bands correspond closely to three of the nine Planck
bands, namely those centered at 1.4, 2.1, and 3.0 mm. The angular resolution of
the Planck data ranges from 5 to 10 arcmin, while the SPT resolution ranges
from 1.0 to 1.7 arcmin. The combined maps take advantage of the high resolution
of the SPT data and the long-timescale stability of the space-based Planck
observations to deliver robust brightness measurements on scales from the size
of the maps down to ~1 arcmin. In each band, we first calibrate and
color-correct the SPT data to match the Planck data, then we use noise
estimates from each instrument and knowledge of each instrument's beam to make
the inverse-variance-weighted combination of the two instruments' data as a
function of angular scale. We create maps assuming a range of underlying
emission spectra and at a range of final resolutions. We perform several
consistency tests on the combined maps and estimate the expected noise in
measurements of features in the maps. We compare maps from this work to maps
from the Herschel HERITAGE survey, finding general consistency between the
datasets. All data products described in this paper are available for download
from the NASA Legacy Archive for Microwave Background Data Analysis server.
