THE ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 89:259-270, 1993 December

	     FAR-ULTRAVIOLET STELLAR PHOTOMETRY: A FIELD IN ORION

                               EDWARD G. SCHMIDT
 Code 7604, E. O. Hulburt Center for Space Research, Naval Research Laboratory,
                              Washington, DC 20375-5320
		  e-mail: eschmidt@unlinfo.unl.edu (Internet)

                                      AND

                              GEORGE R. CARRUTHERS
 Code 7609, E. O. Hulburt Center for Space Research, Naval Research Laboratory,
			   Washington, DC 20375-5320


                                   ABSTRACT

      Far-ultraviolet photometry for 625 objects in Orion is presented.
    These data were extracted from electrographic camera images obtained
    during sounding rocket flights in 1975 and 1982.  The 1975 images were
    centered close to the belt of Orion while the 1982 images were
    centered ~9 deg further north.  One hundred and fifty stars fell in
    the overlapping region and were observed with both cameras.
    Sixty-eight percent of the objects were tentatively identified with
    known stars using the SIMBAD database while another 24% are blends of
    objects too close together to separate with our resolution.  As in
    previous studies, the majority of the identified ultraviolet sources
    are early-type stars.  However, there are a siginificant number for
    which no such identification was possible, and we suggest that these
    are interesting objects which should be further investigated.  Seven
    stars were found which were bright in the ultraviolet but faint in the
    visible.  We suggest that some of these are nearby white dwarfs.

    Subject headings: open clusters and associations: individual (Orion
                      Association)  -- stars: early-type -- surveys -- 
                      techniques: photometric -- ultraviolet: stars -- 
                      white dwarfs