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III/11A F2 and Earlier Stars in SA28, 54, 106, 107 (Upgren, Staron 1969)
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F2 and Earlier Stars in S.A. 28, 54, 106, 107
Upgren Jr. A.R., Staron R.T.
<Astrophys. J., 157, 327 (1969)>
=1969ApJ...157..327U
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ADC_Keywords: Selected areas
Description:
The catalog contains the results of an objective-prism survey for
498 stars of spectral classes F2 and earlier, brighter than
magnitude 11.5, in four regions of intermediate galactic latitude.
This objective-prism survey is part of a study of stellar densities
aiming at the determination of the inclination to the galactic plane
of surfaces of equal stellar density. Each region is centered on one
of the Selected Areas 28, 54, 106, and 107. The fields, 4 x 4
degrees in size, were each photographed on two IIa-O emulsion
plates, one with an exposure time of three minutes on which bright
stars could be classified and one with an exposure time of 40
minutes extending to faint stars. The plates were taken with the
24-inch Baker-Schmidt telescope of the Dyer Observatory. The
dispersion of the objective prism is about 330 A/mm at H-gamma. The
stars were classified according to the criteria established by
Nassau and Seyfert (1946) and Nassau and van Albada (1947).
Photographic magnitudes were found from direct IIa-O plates taken
with the eight-inch Ross camera of the Yale Observatory. The
catalog includes BD numbers, magnitudes, and spectral classes for BD
stars. For non BD stars, the BD number listed in column (1)
indicates a nearby BD star from which the star listed is offset, as
indicated by the data of columns (2) and (3).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
bdstars.dat 23 382 BD stars catalog data
nonbd.dat 33 69 Non-BD stars
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Byte-by-byte Description of file: bdstars.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Sarea Selected Area number
5- 12 A8 --- BD BD number
15- 18 F4.1 mag Photomag Photographic magnitude
21- 22 A2 --- Sp Spectral type
23 A1 --- u_Sp uncertainty in Sp
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Byte-by-byte Description of file: nonbd.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Sarea Selected Area number
5- 12 A8 --- BD BD number of nearby star
15- 17 A3 arcmin RAoffset Right ascension offset from BD star given in
bytes 5-12, minutes of arc
20- 22 A3 arcmin DEoffset Declination offset from BD star given in
bytes 5-12, minutes of arc
25- 28 F4.1 mag Photomag Photographic magnitude
31- 32 A2 --- Sp Spectral type
33 A1 --- u_Sp uncertainty in Sp
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Remarks:
Data format modified at the Astronomical Data Center (ADC)/NASA GSFC,
1988 June...WHW
References:
Nassau, J., and Seyfert, C.K. 1946, ApJ, 103, 117
Nassau, J.J., and van Albada, G.B. 1947, ApJ, 106, 20
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(End) C.-H. Joseph Lyu [Hughes STX/NASA] 10-Jun-1995