Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apjs...52..465c&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 52, Aug. 1983, p. 465-486. Sponsorship: Consiglio Nazionale delle
Astronomy and Astrophysics
Astrophysics
68
Astronomical Photometry, Galactic Structure, Luminosity, Airglow, Astronomical Photography, Atmospheric Attenuation, Error Analysis, Instrument Errors, Interstellar Extinction, Light Scattering, Point Spread Functions, Star Distribution
Scientific paper
The various sources of accidental and systematic errors encountered in photographic and photoelectric surface photometry of galaxies are discussed, including their application to NGC 3379. Photographic errors are considered, including calibration and local errors, sky-level errors, and microphotometer errors. Zero-point and integration errors are covered, as well as centering errors. Instrumental and atmospheric convolution effects are treated, addressing the point spread function, convolution and deconvolution by PSF, convolution by finite apertures, the effect of scattered light, and airglow fluctuations and atmospheric transmission variations. Galactic and extragalactic effects are discussed, including galactic extinction effects at high latitudes, high-latitude galactic diffuse nebulosities, the effect of bright field stars and galaxies and of subthreshold stars and galaxies. A new determination of the PSF from 0 to 90 degrees and the convolution of an r to the 1/4th distribution by a Gaussian PSF are presented.
Capaccioli Massimo
de Vaucouleurs Gerard
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