CMB Experiment Baseline Determination by Minimizing Pixel Observations Dispersion

Details CMB Experiment Baseline Determination by Minimizing Pixel Observations Dispersion CMB Experiment Baseline Determination by Minimizing Pixel Observations Dispersion

1997-04-18

arxiv.org/abs/astro-ph/9704193v2

Astronomy and Astrophysics

Astrophysics

9 pages

Scientific paper

This paper discusses a couple of approaches to removing instrument gain and baseline variation from observations of the CMB anisotropy. These techniques were tested on the COBE DMR data, a balloon experiment, and by monte carlo simulations. This work, though considered technical, is made available because CMB anisotropy mapping data processing is currently very active and a significant number of groups are working on this issue. Specifically, time-ordered estimates of the gain and baseline via fitting to limited sections of data or to the full or a large section of data are considered and compared. An expression is given for the correlation between pixels introduced by the residual baseline and removal technique.

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