J/A+AS/128/573 ubvyΔa photometry of Renson stars (Maitzen+ 1998)
Δ-a and Stroemgren photometry of stars in the
Renson-catalogue of Ap and Am stars
Maitzen H.M., Pressberger R., Paunzen E.
<Astron. Astrophys. Suppl. Ser. 128, 573 (1998)>
=1998A&AS..128..573M 1998A&AS..128..573M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, Am ; Stars, Ap ; Photometry, uvby
Keywords: stars: chemically peculiar - stars: early type
Description:
Results of 131 stars from Renson's (1991, Cat. III/162) catalogue of
Ap and Am stars observed with the Δ-a system are presented. With
few exceptions the probability division of Renson for membership in
the CP2 group of peculiar stars is nicely reflected by peculiar values
of Δ-a. Comparison with already available Δ-a values
yields slightly larger values due to a minor shift in the g1 filter
sampling the depression.
For a description of the Δ-a and Stroemgren photometric system,
see e.g. GCPD/75 and GCPD/04, respectively.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 24 110 Comparison of our photometry with the literature
table4.dat 62 131 Program Stars
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See also:
III/162 : General Catalogue of Ap and Am stars (Renson+ 1991)
III/199 : Observed Periods of Ap and Bp stars (Catalano+ 1998)
J/A+AS/121/57 : 4th supp. to the III/199 catalog (Catalano+ 1997)
J/A+A/378/113 : 5th supp. to the III/199 catalog (Catalano+ 2001)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- RNS Rensons number, as in Cat. III/162
7- 12 I6 --- HD HD number (Cat. III/135)
14- 16 I3 mmag d(b-y) Difference of (b-y)obs to the published values
18- 20 I3 mmag d(m1) Difference of (m1)obs to the published values
22- 24 I3 mmag d(c1) Difference of (c1)obs to the published values
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1 I1 --- CP [0/4] CP class
3- 4 I2 --- Nobs Number of nights
6- 10 I5 --- RNS Rensons number, as in Cat. III/162
12- 17 I6 --- HD HD number (Cat. III/135)
19- 21 F3.1 mag Vmag mag(V) from Renson (1991, Cat. III/162)
23- 25 I3 mmag b-y Observed b-y
27- 28 I2 mmag e_b-y Error of b-y
30- 32 I3 mmag m1 Observed m1
34- 35 I2 mmag e_m1 Error of m1
37- 40 I4 mmag c1 Observed c1
42- 43 I2 mmag e_c1 Error of c1
45- 47 I3 mmag Da Observed Δa
49 I1 mmag e_Da Error of Δa
51- 62 A12 --- SpType Spectral type from Renson (1991, Cat. III/162)
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Acknowledgements: Ernst Paunzen
(End) Patricia Bauer [CDS] 05-Feb-1998