Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.253p..21t&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 253, Nov. 15, 1991, p. 21P-24P.
Astronomy and Astrophysics
Astronomy
10
Astronomical Photography, Imaging Techniques, Virgo Galactic Cluster, Charge Coupled Devices, Contrast, High Resolution
Scientific paper
The potential of the image sharpening technique for making high-resolution images of Virgo cluster galaxies is investigated in order to obtain new estimates of this cluster's distance. Both the Galway Image Sharpening Camera and the MARTINI instrument at the William Herschel Telescope have been used to confirm Fried's 4r0 optimum aperture for image sharpening. Further, the MARTINI image sharpening instrument has been used to observe the Virgo galaxy, IC 3583. The resulting image has 0.60-arcsec FWHM seeing, but to a limiting magnitude of R = 21.7 mag the brightest stars in IC 3583 are not resolved. This tentatively suggests a lower limit to the Virgo distance modulus of m - M greater than 30.7 mag.
Devaney Nicholas M.
Doel Andrew P.
Dunlop Colin N.
Major John V.
Myers Richard M.
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