MOPEX User's Guide - IRSA

MOPEX User’s Guide
Use Refined Pointing: Check this to use the alternate FITS pointing keywords created by the
offline pointing refinement script (pointing_refine.pl). Do not switch this on unless you
have manually run pointing refinement outside of the normal BCD pipeline products.
Most users will never use this option, as pointing refinement is not recommended for Spitzer
data. If you believe that there is a problem with the pointing of your data with respect to e.g.
the 2MASS catalog, please email the Spitzer Helpdesk for assistance.
Apply Zodiacal Subtraction: Check this to subtract the Zodiacal light from the input BCDs
before running the background matching. The estimated Zodiacal light level is taken from the
FITS header keyword ZODY_EST. In the case of IRAC images, Overlap also reads the
keyword SKYDRKZB, which is the estimate of Zodiacal light in the IRAC skydark. For
IRAC images, the value subtracted is ZODY_EST - SKYDRKZB.
Save Zodiacal Subtracted Images: Check this to save the Zodiacal light-subtracted BCDs.
COMMAND LINE INPUT
The following parameters are set in the Global Parameters part of the namelist. Note that if
both MOSAIC_PIXEL_SIZE_X(Y) and MOSAIC_PIXEL_RATIO_X(Y) are both set, the
former takes precedence and will override the latter.
MOSAIC_PIXEL_SIZE_X = -0.00033889
MOSAIC_PIXEL_SIZE_Y = 0.00033889
MOSAIC_PIXEL_RATIO_X = 1
MOSAIC_PIXEL_RATIO_Y = 1
delete_intermediate_files = 0
USE_REFINED_POINTING = 0
apply_zodiacal_correction = 0
save_zodiacal_subtracted_images = 0
OUTPUT
If the Save Zodiacal Subtracted Images option is checked, the corrected files are saved in the
/Zod_Sub directory.
DISCUSSION
Overlap Settings sets up all of the input options that are specific to the Overlap pipe line.
Some of them may be repeated in the Mosaic Settings, so you should be aware that you may
need to match some settings (e.g. Pixel Ratio) between the pipelines.
Overlap (overlap.pl) 30
Overlap Modules