Data processing of MIPSGAL 24 micron images

Details Data processing of MIPSGAL 24 micron images Data processing of MIPSGAL 24 micron images

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.8802m&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #88.02; Bulletin of the American Astronomical Society, V

Astronomy and Astrophysics

Astronomy

Scientific paper

We describe the modifications and corrections that we have made to the standard SSC pipeline-produced, 24 micron basic calibrated data (BCDs) for the MIPSGAL survey. The 24 micron data suffers from numerous artifacts, many of which are caused by scanning across bright point sources and compact extended emission. Generally these can be classified into two types: latency effects, in which there are short timescale elevations and long timescale depressions in pixels that have experienced high flux levels; and global effects wherein entire columns or rows of pixels have level offsets due to the presence of a bright source on or adjacent to the array. We also account for a residual bias pattern in the array which is similar in nature to the "first-frame" effect noted in IRAC data. Most of our corrections are additive in nature as multiplicative corrections cause noticeable irregularities over the large dynamic range observed in our survey mosaics. In most cases our approach is to characterize the artifact and determine a correction, although in some cases the artifacts are simply masked from the images.
This work is based on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. Support for this work was provided by NASA through an award issued by JPL/Caltech.

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