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2001PASP..113..267S - Publ. Astron. Soc. Pac., 113, 267-307 (2001/March-0)
The Mount Wilson halo mapping project 1975-1985. II. Photometric properties of the Mount Wilson catalogue of photographic magnitudes in selected areas 1-139.
SANDAGE A.
Abstract (from CDS):
The first purpose of the paper is to extend the Basel star counts to fainter magnitudes. For this, 200 inch photographic plates were measured to the plate limits near B=22, calibrated with the photoelectric photometry listed here. A second purpose is to derive certain properties of the catalog. The interests are (1) to determine the internal (random) measuring errors of the MWC as a function of magnitude after correcting for the systematic scale error in each area, (2) to test for a color equation between the corrected mpg(MWC) values and the Bpe system that must be present because of the difference in reflectivity between silvered and aluminized mirrors, and (3) to test for possible distance-to-center corrections of the scale-corrected MWC magnitudes.
Photographic photometry is used to complete the count surveys in each of the program areas to the limit of the 200 inch plates. Color-magnitude diagrams are shown for each area, generally complete to V=20, B-V=2.0. The work is preparatory to an analysis for Galactic structure when the larger database is available in a program by Majewski using Kitt Peak 4 m plates, epoch circa 1975, that will be to provide both a deeper count survey in B and V and proper motions for the larger sample.
Abstract Copyright: ∼
Journal keyword(s):
VizieR on-line data: <Available at CDS (J/PASP/113/267): tablea.dat tableb.dat>
Simbad objects: 1051
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