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Can I do point source extraction on the MOPEX mosaicked image?
Posted by IRSA HelpDesk on 11 March 2013 01:46 PM
Yes. First you should produce a mosaic with the corresponding uncertainty image. Then you run apex_1frame.pl (APEX Single Frame in the GUI) setting INPUT_IMAGE_FILE = <mosaic_image_file_name> and SIGMA_IMAGE_FILE = <mosaic_uncertainty_image_file_name>. Use the appropriate PRF file. PRF fitting is not recommended on IRAC mosaics - either use aperture photometry or do the PRF-fitting on the stack of BCDs with apex.pl
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