Far-UV two-dimensional photometry of bright galaxies

Details Far-UV two-dimensional photometry of bright galaxies Far-UV two-dimensional photometry of bright galaxies

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...233l...9b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 233, no. 1, July 1990, p. L9-L12.

Astronomy and Astrophysics

Astrophysics

13

Balloon-Borne Instruments, Far Ultraviolet Radiation, Galactic Radiation, Ultraviolet Photometry, Image Resolution, Interstellar Matter, Ultraviolet Telescopes

Scientific paper

Calibrated data of UV fluxes at 2000 A for NGC 5194 (M 51), 3031 (M 81), 3034 (M 82), 4321 (M 100), 5457 (M 101), 4258 (M 106) galaxies are presented. The data have been obtained by means of a balloon-borne FOCA 1000/1500 instrument. The image resolution is 15-20 arcsec FWHM. A photometric accuracy of 0.2 magnitude has been achieved by using photometric boxes and a model of instrument transmission and atmospheric extinction. Images are registered to better than 4 arcsec in 2000 epoch coordinates. Though some images exhibit striking features, such as a missing companion of M 51, the differences compared to visible images consist in a subtle combination of missing or additional features.

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