Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...187.7510l&link_type=abstract
American Astronomical Society, 187th AAS Meeting, #75.10; Bulletin of the American Astronomical Society, Vol. 27, p.1393
Astronomy and Astrophysics
Astronomy
Scientific paper
The 2MASS project will produce a catalog of roughly 100 million point source detections in the J/H/K_s bands. This paper describes the automated process by which the absolute positions and brightnesses of these objects will be measured from the 10-20 Tbytes of raw image data produced during the survey. Detected objects will have RA/Dec (J2000) positions accurate to < 0.5 arcseconds relative to the Hipparchos/Tycho reference catalog star positions. The absolute photometric accuracy of 2MASS point source magnitudes will be <= 0.10 magnitudes for J/H/K_s magnitudes of 15.8, 15.1, and 14.3 respectively, and <= 0.05 magnitudes for sources brighter than 14.4, 14.0, and 13.5, respectively. The list of stars will also be 99% complete and 99.99% reliable in the faintest magnitude bin. An analysis of position reconstruction and photometry techniques is made using sets of data obtained on a prototype (single-channel) camera. The point source positional and photometric specifications of the survey can either be met or are close to being met using the current prototypical processing pipeline.
Beichman Charles Arnold
Cutri Roc M.
Evans Ted
Kirkpatrick David
Kopan Eugene
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