The IRAF Mosaic Data Reduction Package
Francisco G. Valdes · 1998
Abstract. The IRAF Mosaic Data Reduction Package, mscred, pro-cesses data from mosaics of CCDs such as the NOAO CCD Mosaic Camera2. A brief design of the package was presented earlier by Valdes (1997a). Since then a rst implementation of the software has been completed. This paper summarizes the current status of the software and our plans for future developments. 1. Current Status Most of the components of the original design (Valdes 1997a) for an IRAF Mo-saic Data Reduction Package have been implemented in the rst version of the mscred package. This has allowed complete, end-to-end reductions of data from the NOAO CCD Mosaic Camera. The package operates on multiexten-sion FITS format (MEF) les consisting of a global header and individual image extensions for each amplier (Valdes 1997b). The raw data les are processed so that each image extension is flux and coordinate system calibrated. Mosaic cameras have gaps and misalignments between the CCD elements so, when a