CCD calibration of the magnitude scale for the Southern Sky Redshift Survey Extension galaxy sample

Details CCD calibration of the magnitude scale for the Southern Sky Redshift Survey Extension galaxy sample CCD calibration of the magnitude scale for the Southern Sky Redshift Survey Extension galaxy sample

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....106..676a&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 106, no. 2, p. 676-686.

Astronomy and Astrophysics

Astronomy

20

Calibrating, Charge Coupled Devices, Galaxies, Red Shift, Southern Sky, Data Reduction, Southern Hemisphere

Scientific paper

New CCD observations are used to examine the accuracy of the magnitude system adopted to define the galaxy sample being employed to conduct the Southern Sky Redshift Survey Extension (SSRS2). The magnitude scale of the SSRS2 is based on the instrumental magnitudes of the nonstellar objects listed in the ST ScI Guide Star Catalog, converted to the B(0) system. The magnitudes derived in the photometric catalog of Lauberts and Valentijn (1989) are found to be in excellent agreement with the CCD measurements, with isophotal magnitudes showing a dispersion of about 0.13 mag, although an offset 0.15 mag in zero point may be present. The magnitudes m(SSRS2) derived from the ST ScI instrumental magnitudes correspond well to a blue magnitude measured within the B = 26 mag/sq arcsec isophote. It is argued that the ST ScI objects may provide an invaluable source for the construction of a uniform magnitude-limited sample of galaxies in the Southern Hemisphere.

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