A sit Vidicon for Surface Photometry

Details A sit Vidicon for Surface Photometry A sit Vidicon for Surface Photometry

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982msngr..29....5g&link_type=abstract

The Messenger, No.29, P. 5, 1982

Physics

Optics

2

Scientific paper

The study of surface brightness distributions of extended cosmic light sources is an essential observational approach to understand their spatial structure. In general, however, surface photometry is difficult to interpret without other supporting observations like spectroscopy, which yields the velocity field or other physical parameters. The reason is that the surface illumination is the total number of light sources within a conical column along the line of sight. This cone is the solid angle of an individual picture element ("pixel") projected onto the sky by the telescope optics. Therefore, astronomical surface photometry yields the surface density of cosmicallight sources, which is badly contaminated by light sources in the foreor background or even in the surrounding field.

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