1997/04/18 by George F. Smoot, Smoot, George F.
Engineering · Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #FOS: Physical sciences #Reservoir Engineering and Simulation Methods #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9704193
9 pages
openalex publication_date 1997/04/18 · arxiv created 1997/05/11 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
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.