Correcting MIPS Spitzer Images for Distortion

Details Correcting MIPS Spitzer Images for Distortion Correcting MIPS Spitzer Images for Distortion

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..376..433m&link_type=abstract

Astronomical Data Analysis Software and Systems XVI ASP Conference Series, Vol. 376, proceedings of the conference held 15-18 Oc

Astronomy and Astrophysics

Astronomy

Scientific paper

The images from the Multi-band Imaging Photometer for Spitzer (MIPS) instrument on the Spitzer Space Telescope are distorted by a few percent from a regular sky grid, and vary slightly from one exposure to the next due to the motion of the scan mirror. We used the Code~V optical models for Spitzer/MIPS to estimate the distortions present in the images from the three MIPS detectors. Based on the Code~V results, we developed an algorithm to represent these distortions as polynomials with coefficients represented as FITS header keywords (the SIP convention). We present the method of correcting the MIPS images for distortions, the results of Code~V testing, and the comparisons with on-orbit data.

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