Article (Scientific journals)
Instrumental effects and the Stroemgren photometric system
Manfroid, Jean; Sterken, C.
1987In Astronomy and Astrophysics. Supplement Series, 71, p. 539-555
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Keywords :
ASTRONOMICAL PHOTOMETRY; STELLAR COLOR; UBV SPECTRA; COLOR-MAGNITUDE DIAGRAM; DATA REDUCTION; MATCHED FILTERS; NUMERICAL ANALYSIS
Abstract :
[en] The extent to which the use of different photometers can affect results on stellar color indices was investigated by simultaneously observing a sample of widely different stars with several uvby photometric systems available at the ESO, La Silla, Chile. In one instance, the ESO 50-cm telescope and the four-channel photometer at the Danish 50-cm telescope were used simultaneously. The reductions were performed separately on each data set, using a linear color transformation procedure. The results agree with theoretical investigations which showed that substantial errors can arise from the nonconformity of passbands. It is emphasized that it is necessary to use separate color transformations for various stellar types and classes and for different interstellar reddenings.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Manfroid, Jean  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Sterken, C.;  Brussel, Vrije Universiteit, Brussels, Belgium
Language :
English
Title :
Instrumental effects and the Stroemgren photometric system
Publication date :
01 December 1987
Journal title :
Astronomy and Astrophysics. Supplement Series
ISSN :
0365-0138
eISSN :
1286-4846
Publisher :
EDP Sciences, Les Ulis, France
Volume :
71
Pages :
539-555
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 30 January 2010

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