The off-focus photograph technique for low dispersion spectra

Details The off-focus photograph technique for low dispersion spectra The off-focus photograph technique for low dispersion spectra

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.165..299h&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 165, no. 2, March 1990, p. 299-311. Research supported by the National Nat

Astronomy and Astrophysics

Astronomy

1

Astronomical Photography, Photographic Plates, Quasars, Stellar Spectrophotometry, Absorption Spectra, Dispersion, Focusing, Sky Surveys (Astronomy)

Scientific paper

A photograph filtering technique has been developed to search for QSOs
with objective prism plates. After off-focus reproduction, the SNR
increases and some spectral lines in the prism spectra may be recongized
by eye agianst the noise. The principle of this technique is discussed.

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