J/ApJS/76/1001 UBV photometry of HK survey stars (Preston+, 1991)
Photoelectric UBV photometry of stars selected in the HK objective-prism survey
Preston G.W., Shectman S.A., Beers T.C.
<Astrophys. J. Suppl. Ser. 76, 1001 (1991)>
=1991ApJS...76.1001P 1991ApJS...76.1001P
ADC_Keywords: Photometry, UBV ; Stars, metal-deficient ; Stars, halo
Keywords: photometry - stars: horizontal branch - stars: weak-line
Abstract:
Photoelectric UBV observations of 1782 stars are used to explore
properties of the HK objective-prism survey conducted by Beers,
Preston, and Shectman with the Curtis-Schmidt telescope of the Cerro
Tololo Inter-American Observatory. We construct an intrinsic (U-B)0
versus (B-V)0 relation for blue horizontal branch stars and use it to
derive estimates of E(B-V) color excesses in 50 survey fields.
Comparison of these with the reddening maps of Burstein and Heiles
indicates good agreement except in low-latitude fields toward the
Galactic bulge. We describe qualitative features of the stellar
content of the HK survey by use of unreddened two-color diagrams and
indicate how the photometric data may prove useful in several
applications. Finally, we use a halo density model to estimate the
variation of completeness with apparent magnitude, B, in our catalog
of field horizontal branch star candidates.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 56 1305 Data for BHB candidates
table4.dat 57 372 Data for metal-poor candidates
table5.dat 54 102 Data for stars with ambiguous HK survey
spectral classes
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See also:
J/AJ/87/1515 : UBV photometry of AB stars in halo (Pier, 1982)
J/ApJS/53/791 : Spectroscopy of AB stars in halo (Pier, 1983)
J/AJ/90/2089 : Stars of very low metal abundance. (Beers+, 1985)
J/PASP/102/1392 : UBV photometry from HK survey. (Doinidis+ 1990)
J/PASP/103/973 : Photoelectric UBV from HK survey. (Doidinis+ 1991)
J/AJ/103/267 : Spectrocopy of hot stars in galactic halo (Beers+ 1992)
J/AJ/103/1987 : Stars of very low metal abundance (Beers+ 1992)
J/AJ/108/268 : HK survey emission-line candidates positions (Beers+ 1994)
J/AJ/108/538 : Metal-poor MS stars UBV photometry (Preston+ 1994)
J/AJ/112/1188 : HK survey emission-line candidates (Beers+ 1996)
J/AJ/117/2329 : Spectroscopy of hot stars in the halo. (Wilhelm+, 1999)
J/ApJS/123/639 : UBV photometry of metal-weak candidates (Norris+, 1999)
Byte-by-byte Description of file: table3.dat table4.dat table5.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- BPS-CS Curtis-Schmidt field number
11 A1 --- m_BPS-CS Multiplicative index on star name
13- 17 A5 --- Sp Catalog spectral class (MP=meta-poor)
19- 23 F5.2 mag Vmag V magnitude
25- 30 F6.3 mag B-V B-V colour index
32- 37 F6.3 mag U-B []? U-B colour index
39- 43 F5.1 deg GLON Galactic longitude
45- 49 F5.1 deg GLAT Galactic latitude
51- 54 A4 --- Code Code for observation period and telescope (1)
56- 57 A2 --- Note Note about the star (2)
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Note (1): The codes are:
a = Observed in 1987-1989 at 2.5m telescope by G. Preston
b = Observed in 1987-1989 at 1.0m telescope by G. Preston
c = Observed prior to 1985 at 1.0m telescope by G. Preston
d = Observed prior to 1985 at 1.0m telescope by J.Pier
Multiple observations are indicated by digits that follow code letters
Note (2): The codes are related to the following remarks:
1 = star was used to derive BHB intrinsic two-color relation
2 = star has optical companion within 10"
3 = variable? Star seemed too faint at time of observation
4 = star is regarded as variable on basis of standard deviations
in V and B-V
5 = star 12a is NW member of pair, stars 12b is SE member of pair
RR = RR Lyrae
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References:
Beer T.C., Preston G.W., and Shectman S.A. =1985AJ.....90.2089B 1985AJ.....90.2089B
Beer T.C., Preston G.W., and Shectman S.A. =1988ApJS...67..461B 1988ApJS...67..461B
Burstein D. and Heiles C., =1982AJ.....87.1165B 1982AJ.....87.1165B
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Historical notes: Keypunched at CDS
(End) Simona Mei, Patricia Bauer [CDS] 30-Jan-1995