Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pasp...96..566t&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 96, July 1984, p. 566-573.
Astronomy and Astrophysics
Astronomy
12
Astronomical Photometry, Faint Object Camera, Galaxies, Hubble Space Telescope, Space Observations (From Earth), Background Noise, Charge Coupled Devices, Signal To Noise Ratios
Scientific paper
After defining photon flux, camera counts, and S/N ratio, this paper studies the background noise for the wide-field CCD camera on the Space Telescope (ST) and comparable current instrumentation on an existing 4-m ground-based telescope. Present knowledge of galaxy luminosity profiles is used to derive the expected surface brightness and apparent angular diameter of high-redshift galaxies. A comparison of the 4-m and ST Wide-Field Camera systems is made for total photometry and surface photometry. Detection is discussed, as are the history of galaxy-limiting photometry and the evident need for larger ground-based optical telescopes and eventually an orbiting large telescope. Future improvements in ground-based instrumentation are addressed.
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