Vulcan - A low-resolution spectrophotometer for measuring the integrated colors of galaxies

Details Vulcan - A low-resolution spectrophotometer for measuring the integrated colors of galaxies Vulcan - A low-resolution spectrophotometer for measuring the integrated colors of galaxies

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pasp..102..674r&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 102, June 1990, p. 674-681. Research supported by FFWF.

Physics

Optics

1

Astronomical Spectroscopy, Color, Galaxies, Spectrophotometers, Brightness Distribution, Charge Coupled Devices, Fiber Optics, Holography, Optical Properties, Star Formation

Scientific paper

Recent advances in fiber optics, holographic gratings, and blue CCD sensitivity have been combined to develop a low-resolution spectrophotometer. Combining the principles of aperture photometry and spectroscopy, this device is designed specifically to measure the light from galaxies with low contrast to the sky brightness (i.e., low surface brightness galaxies). The instrument consists of two large apertures (up to several arcmin) with fast-field lens for imaging the entrance pupil onto a fiber-optics cable. The circular configuration for the input end of the fiber cable is modified to a rectangular slit at the output end. The output is then imaged onto a concave holographic grating producing a spectrum from 3200 A to 7600 A with a resolution of 140 A. The main purpose of this instrument is to obtain narrow-band optical colors for low surface brightness galaxies, which can then be applied to the study of stellar populations in these galaxies.

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