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J/A+AS/104/429 uvby Photometry of G-type dwarfs (Olsen 1994)
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A large, complete, volume-limited sample of G-type dwarfs.
I. Completion of Stroemgren uvby photometry
Olsen E.H.
<Astron. Astrophys. Suppl. Ser. 104, 429 (1994)>
=1994A&AS..104..429O
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ADC_Keywords: Surveys; Stars, G-type; Photometry, uvby
Keywords: Galaxy: evolution - solar neighbourhood - stars: late type -
star: fundamental parameters - survey: techniques: photometric
Abstract:
Four-colour photometry of potential dwarf stars of types G0 to K2, selected
from the Michigan Spectral Catalogues (Vol. 1-3), has been carried out. The
results are presented in a catalogue containing 4247 uvby observations of
3900 stars, all south of {delta} = -26deg. The overall internal rms errors
of one observation (transformed to the standard system) of a program star
in the interval 8.5 < V < 10.5 are 0.0044, 0.0021, 0.0039, and 0.0059,
respectively, in V, b-y, m_1_ , and c_1_. The purpose of the catalogue,
combined with earlier catalogues, is to allow selection of a large,
complete, volume-limited sample of G- and K-type dwarfs, investigate their
metallicity distribution, and compare it to predictions of various models
of galactic chemical evolution. Future papers in this series will discuss
these subjects.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4 126 60 60 uvby standards, standard system
table6 124 3900 The catalogue
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Byte-by-byte Description of file: table4
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD [1/225300]+= HD (Henry Draper) designation
7- 10 A4 --- Mult Identification of visual double star
components included in the diaphragm
14- 19 F6.3 mag Vmag transformed to the standard Johnson V mag.
22- 26 F5.3 mag e_Vmag mean error on V
31- 36 F6.3 mag b-y
39- 43 F5.3 mag e_(b-y) mean error on (b-y)
48- 53 F6.3 mag m1 = (v-b) - (b-y)
56- 60 F5.3 mag e_(m1) mean error on m1
65- 70 F6.3 mag c1 = (u-v) - (v-b)
73- 77 F5.3 mag e_(c1) mean error on c1
80- 82 I3 --- w_V weight of V
84- 86 I3 --- w_col weight of 4-colour indices
88- 90 I3 --- NN Number of nights
94- 99 F6.3 mag D(V) Difference V(standard) - V(transformed)
103-108 F6.3 mag D(b-y) Difference (b-y)(st) - (b-y)(tr)
112-117 F6.3 mag D(m1) Difference m1(st) - m1(tr)
121-126 F6.3 mag D(c1) Difference c1(st) - c1(tr)
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Byte-by-byte Description of file: table6
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD [1/225300]+=? HD (Henry Draper) designation
NB!: This column may be blank
7- 10 A4 --- Mult Identification of visual double star
components included in the diaphragm
13 A1 --- Prog [KBM*] Program star list
K = G or K-type star (see paper,section 2.1.1)
B = Calibration star (see paper,section 2.1.1)
M = G or K giant (see paper, section 2.1.2)
* = miscellaneous reasons
17- 27 A11 --- DM Durchmusterung identification
(BD, CD or CP in bytes 17-18;
SZZNNNNN on bytes 19-26;
appended letter in byte 27
NB! This column may be blank
28- 38 A11 --- ID Alternative identification
39 A1 --- T [DGCW% ] Transformation group
(see paper!, section 3.4.2)
D = GKV group,
G or C = GKIII group,
% W or blank = BAF group
44- 49 F6.3 mag Vmag transformed to the standard Johnson V mag.
52- 56 F5.3 mag e_Vmag mean error on V
61- 66 F6.3 mag b-y on standard system if byte 39 is D
69- 73 F5.3 mag e_(b-y) mean error on (b-y)
78- 83 F6.3 mag m1 on standard system if byte 39 is D
86- 90 F5.3 mag e_(m1) mean error on m1
95-100 F6.3 mag c1 on standard system if byte 39 is D
103-107 F5.3 mag e_(c1) mean error on c1
110-112 I3 --- w_V weight of V
114-116 I3 --- w_col weight of 4-colour indices
118-120 I3 --- NN Number of nights
124 A1 --- Note [NDG* ]
N = visual double star not listed in IDS
D = calibration star (see paper,section 2.1.1)
G = G or K giant (see paper, section 2.1.2)
* = individual note (see paper)
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Courtesy: Erik H. Olsen <eho@bro835.astro.ku.dk>
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(End) Erik Heyn Olsen [CDS] 19-Mar-1994