NFEXTERN is an external IRAF package designed specifically for the reduction of NEWFIRM (an IR mosaic camera) instrument data, but which is also useful for other IR and mosaic reductions. It includes updated tasks found in MSCRED as well as catalog tools found in the ACE package. The package is now available from the downloads area and the ftp archive at NOAO.
See below for more information, please report any problems or comments.
The NFEXTERN package is used for reducing data from the NEWFIRM wide-field infrared imager. The package includes three sub-packages:
- ace - Astronomical Cataloging Environment
- msctools - General tools for working with multi-extension format (MEF) data
- newfirm - Tasks designed for reducing NEWFIRM data
# ACE Sub-Package aceall - master segmentation and cataloging task acecatalog - catalog sources in images - single image catalogs - multiple image catalog using first image segmentation acediff - catalog sources in the difference of images aceevaluate - evaluate sources - single image catalogs using reference catalog and segmentation - multiple image catalog using reference catalog and segmentation acesegment - segment images into - sky images - object masks - sky subtracted images acefilter - filter catalogs and object masks acedisplay - display images with object mask isophote overlays acetvmark - display images with object filtered overlays # NEWFIRM Package contents cgroup - Group exposures combine - Combine exposures dcombine - Combine dark exposures fcombine - Combine flat exposures nfdproc - Process NEWFIRM dark exposures nfdeltasky - Fit and subtract residual sky background from NEWFIRM images nffocus - Determine best focus from NEWFIRM exposures nffproc - Process NEWFIRM dome flat field exposures nfgroup - Group NEWFIRM data in list files nflinearize - Linearize NEWFIRM exposures nflist - List NEWFIRM image parameters as derived by nfproc nfmask - Create data quality masks for NEWFIRM exposures nfoproc - Apply instrumental calibrations to NEWFIRM object exposures nfproc - General task for processing NEWFIRM data nfsetsky - Pair exposures for pairwise sky subtraction nfskysub - Subtract sky from NEWFIRM images nftwomass - Get 2MASS catalog data nfwcs - Derive WCS for NEWFIRM exposures