R. Cutri reported that 3-channel laboratory data have been received at IPAC. The data correspond to dark and flat sequences, and will be run through the pipeline through DARKS. J. White is currently reformatting the data to conform to the Rev. J format, since this was not possible in the laboratory where the data originated.
R. Cutri reported that the camera is undergoing chip alignment. Currently the J and K alignment is accurate to within one pixel, but the H chip needs a little more work.
R. Cutri reported that the analysis effort needs to have a new file format that eliminates many of the existing columns in the final table-file format for point sources, i.e., the *.bfpts file. This cannot be done with the stf (Subset Table File) program, because more than a thinning out of columns is needed; some logic is required to select which of several magnitudes per band to use as the band's one representative magnitude (for example). For now, this will be done by an offline utility program that will not be considered part of 2MAPPS and hence will not be inder configuration control, require an SDS, etc. If this program turns out to be needed later as part of the pipeline, it will be subjected to the more formal procedures.
B. Light and T. Evans reported on the ongoing study of the aperture magnitude curves of growth. A problem had been noticed involving the failure of the background-subtracted flux in the aperture to approach a constant value as the aperture is enlarged. Possible problems in extraneous-source removal and background estimation were suggested as possible causes. The algorithm had been using a mode-estimation technique for sky level computation, and changing this to a median-estimation technique removed most but not all of the symptoms. Work is continuing.
L. Fullmer reported that source matching in scan-overlap areas has been checked out for the current CONMAN delivery. Match and non-match tables appear correct, as well as the nightly confirmation summary table listing match statistics for each scan. The matching program is being enhanced to include more statistics in the summary table.