Computer Science
Scientific paper
Apr 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ycat..40250025d&link_type=abstract
VizieR On-line Data Catalog: J/A+AS/25/25. Originally published in: 1976A&AS...25...25D
Computer Science
H Ii Regions, Photometry: H-Alpha
Scientific paper
The photographs were made at the Observatoire de Haute-Provence at the end of 1969, throughout 1970, and then again in 1972. A 5cm refractor was used with a very selective interference filter (Δλ=10Å) centered on Hα, and a focal reducer took the f/5 beam down to f/1.25. Exposures were made using flashed 103-aE plates.
The catalogue includes also the HII regions discovered by Sivan 1974 (Compt. Rend. Acad. Sci. Paris 278, 127; 1974A&AS...16..163S).
(1 data file).
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