J/AJ/109/2828 CaII H and K filter photometry II. (Twarog+ 1995)
Ca II H and K filter photometry on the uvby system. II.
The catalog of observations.
Twarog B.A., Anthony-Twarog B.J.
<Astron. J. 109, 2828 (1995)>
=1995AJ....109.2828T 1995AJ....109.2828T
ADC_Keywords: Photometry, uvby ; Stars, metal-deficient
Keywords: Photometry, hk
Description:
A catalog of 1990 stars on the Caby system is presented. The sample
includes stars covering an extensive range in spectral type,
luminosity class, and metallicity, as well as apparent magnitude. The
hk indices are on the standard system defined in Anthony-Twarog et al.
(1991AJ....101.1902A 1991AJ....101.1902A), while the V and (b-y) indices have been
transformed to the system of Olsen (1993A&AS..102...89O 1993A&AS..102...89O), superseding
the values in the original catalog of standard stars.
Photometric system:
Definition and properties of the H&K photometric system may
be found at URL http://obswww.unige.ch/gcpd/ph81.html
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 80 1990 The observations (Table 2 of the paper)
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See also:
J/AJ/107/1577 : Halo red giants reddening (Anthony-Twarog+, 1994)
J/A+AS/102/89 : Olsen's Stroemgren photometry of G5-type HD stars
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- HD Henry Draper Catalogue designation
12- 22 A11 --- Name1 Alternative designation (1)
25- 32 A8 --- Name2 Alternative designation (1)
35- 40 F6.3 mag Vmag Magnitude in V system
42- 46 F5.3 mag e_Vmag Mean error on Vmag
48- 53 F6.3 mag b-y colour index in Stroemgren system
55- 59 F5.3 mag e_b-y Mean error on b-y
61- 66 F6.3 mag hk hk index in Caby system [(Ca-b)-(b-y)]
68- 72 F5.3 mag e_hk standard deviation for a single observation
75- 76 I2 --- Nobs [1/31] Number of observations
79- 80 A2 --- Class Classification of the star (2)
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Note (1): alternative designations are in the following order of priority:
BD, CD, CP: Durchmusterung
C: Beers (1992AJ....103.1987B 1992AJ....103.1987B), or
G: from Giclas, Catalog I/79
HR: from Bright Star Catalog V/50
LTT: Luyten Two Tenths Catalogues, 1957, 1961;
Anthony-Twarog & Twarog (1994AJ....107.1577A 1994AJ....107.1577A)
RA: Rose & Agostinho (1991AJ....101..950R 1991AJ....101..950R)
W: Wilson 1953, Catalog III/21
YC: Jenkins, 1952, 1953, Yale Catalogue of Trigonometric Parallaxes,
Catalog I/81
Note (2): Classification (stars hotter than (b-y)=0.41 have no class):
D = for dwarfs redder than (b-y) = 0.41
G = for giants cooler than (b-y) = 0.41
C = for carbon stars
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Courtesy: Barbara Anthony-Twarog
(End) Francois Ochsenbein [CDS] 21-Nov-1995