Accession Number : ADA115772

Title :   S201 Catalog of Far-Ultraviolet Objects. Revised.

Descriptive Note : Final rept.,


Personal Author(s) : Page,Thornton ; Carruthers,George R ; Heckathorn,Harry M

PDF Url : ADA115772

Report Date : 06 May 1982

Pagination or Media Count : 229

Abstract : A catalog of star images was compiled from images obtained by the NRL Far-Ultraviolet Camera/Spectrograph (Experiment S201), operated from 21 to 23 April 1972 on the lunar surface during the Apollo-16 mission. These images were scanned on a microdensitometer, and the output was recorded on magnetic tapes. A set of seven computer programs was written to process these recorded outputs in order to compile the catalog. The catalog is divided into 11 parts, covering ten fields in the sky (the Sagittarius field being covered by two parts), and each part is headed by a constellation name and the field center coordinates. The errors in position of the detected images are less than about 3 arc-min. Correlations are given with star numbers in the Smithsonian Astrophysical Observatory catalog, and star images detected on two or more S201 frames which do not corresponds to SAO stars are listed. The Revised Catalog differs from the first edition (NRL Report 8173, 20 January 1978) in that the brightnesses of all detected objects have been placed on an absolute scale of UV magnitudes based on instrument preflight calibrations. These magnitudes are compared with expectations based on theoretical model atmospheres and with calibrated OAO-2 observations of stars in common. The text includes discussions of the data analysis procedures and discussions of some results for nonstellar objects of special interest. The Revised S201 Catalog is also available on a single reel of seven-track magnetic tape. (Author)

Descriptors :   *Stars, *Catalogs, *Far ultraviolet radiation, Astronomical cameras, Optical scanning, Data processing, Magnetic tape, Optical images, Computer programs, Brightness, Standards, Galaxies, Nebulae, Astronomical bodies, Densitometers, Astronomical instruments, Tables(Data)

Subject Categories : Astrophysics
      Information Science
      Ultraviolet Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE