The S201 far-ultraviolet imaging survey. II - A field in Cygnus

Details The S201 far-ultraviolet imaging survey. II - A field in Cygnus The S201 far-ultraviolet imaging survey. II - A field in Cygnus

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apjs...54..271c&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 54, Feb. 1984, p. 271-290. NASA-supported research.

Astronomy and Astrophysics

Astronomy

15

Astronomical Photography, Cygnus Constellation, Early Stars, Ultraviolet Astronomy, A Stars, Astronomical Catalogs, B Stars, Data Reduction, Far Ultraviolet Radiation, Moon, Remote Sensing, Imagery, Ultraviolet, Wavelengths, Apollo 16, Photographic Observations, Procedure, Analysis, Magnitude, Data, Spectra, Classification

Scientific paper

Far-ultraviolet imagery of a region in Cygnus, a 20 deg diameter field centered near (1950) R. A. 21 h 31.2 m decl. +37 deg 25 arcmin, was obtained by the S201 far-ultraviolet camera during the Apollo 16 mission. In a 10 minute exposure covering the 1250-1600 A wavelength range (effective wavelength 1400 A), 730 star images can be detected, corresponding to a limiting ultraviolet magnitude of about m (1400) = 10. Assuming nominal interstellar extinction values in this region near the galactic plane, this result corresponds to the detection of A0 V stars to a distance of 300 pc and of B0 V stars to 1500 pc. Uncertainties in spectral classification and interstellar extinction for individual objects are probably more significant than calibration or measurement errors. Most of the objects detected are identified with stars in the Smithsonian Astrophysical Observatory Star Catalog (1966), or the Catalog of Stellar Identifications (1979) or both, but 87 objects remain unidentified (or are identified with late-type stars).

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