The magnitude equation in right ascension between the FK 4 and recent catalogues of southern observations

Details The magnitude equation in right ascension between the FK 4 and recent catalogues of southern observations The magnitude equation in right ascension between the FK 4 and recent catalogues of southern observations

Mar 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...119..307b&link_type=abstract

Astronomy and Astrophysics, vol. 119, no. 2, Mar. 1983, p. 307-312.

Astronomy and Astrophysics

Astrophysics

2

Astronomical Catalogs, Southern Sky, Stellar Magnitude, Hermitian Polynomial, Legendre Functions, Statistical Analysis

Scientific paper

Recent observations indicate the need for considerable corrections to the right ascensions of the Fourth Fundamental Catalogue (FK4) in the southern hemisphere. Among these corrections is a class depending systematically on the stellar magnitude, the so-called magnitude equations. For a number of catalogues of southern observations a comparison with the FK4 yields a strong effect which depends quadratically on the magnitude. This phenomenon is discussed in detail.

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