III/10A G5 and Later Stars in a North Galactic Pole Region (Upgren 1962)
G5 and Later Stars in a North Galactic Pole Region Upgren Jr. A.R. <Astron. J. 67, 37 (1962)> =1962AJ.....67...37U
ADC_Keywords: Galactic pole, north ; Stars, late-type ; Regional catalog Description: The catalog is an objective-prism survey of late-type stars in a region of 396 square degrees surrounding the north galactic pole. The objective-prism spectra employed have a dispersion of 580 A/mm at H-gamma and extend into the ultraviolet region. The catalog contains the magnitudes and spectral classes of 4027 stars of class G5 and later, complete to a limiting photographic magnitude of 13.0. The spectral classification of the stars is based on the Yerkes system. The catalog includes the serial numbers of the stars corresponding to the numbers on the identification charts in Upgren (1984), BD and HD numbers, B magnitudes, spectral classes, and letters designating the subregion and identification chart on which each star is located. This survey was undertaken to determine the space densities at varying distances from the galactic plane. Accurate separation of the surveyed stars of G5 and later into giants and dwarfs was achieved through the use of the UV region as well as conventional methods of classification. The resulting catalog of 4027 stars is probably complete over the region to a limiting photographic magnitude of 13.0. The region covered by the survey is the same as that discussed by Slettebak and Stock (1959) and is in the approximate range RA 11 30 to 13, Declination +25 to +50 (B1950.0). The catalog includes all M and Carbon stars previously published by Upgren (1960). For a discussion of the classification criteria, the combining of multiple classifications (each spectral image was classified twice), the determination of magnitudes, and additional details about the catalog, the source reference should be consulted. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file catalog.dat 45 4027 Catalog data notes.dat 80 142 Notes for this catalog
Byte-by-byte Description of file: catalog.dat
Bytes Format Units Label Explanations
1- 6 A6 --- NGP *NGP designation 8- 15 A8 --- DM DM number (all BD) of the star 17- 22 I6 --- HD ? HD number 25- 28 F4.1 mag Bmag ? Blue magnitude 30- 36 A7 --- Sp Spectral type (colons for uncertainty) 43 A1 --- Reg Subregion and identification chart 45 A1 --- Note [*] Note flag (asterisk)
Note on NGP: the NGP designation is made of a zone number (bytes 1-2) and a sequential number in the zone (bytes 4-6).
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 6 A6 --- NGP NGP designation 8 I1 --- No Line number within a note 9- 80 A72 --- Text Text of remarks
History: The catalog, as originally received by the Centre de Donnees Astronomiques de Strasbourg, was essentially in the form of the published table, but with a brief data description (by columns) in free text at the top of the file. However, some kind of strange pseudo-coordinates had been added to the records. Right ascensions for each region started at some value and increased by 0.01 hours for each succeeding star. From each right ascension and the declination zone (only), galactic coordinates had been computed. The right ascensions then restarted for each new region. The source of these coordinates is unknown, as they were not in the original catalog; Dr. Upgren did not computerize the machine version and had no knowledge of their existence. These coordinates were removed at the ADC. A comparison of the machine-readable file against the published catalog also revealed a number of errors, such as duplicate and missing records. A number of errors had also been discovered by Dr. S. Nishimura of the Japanese Astronomical Data Center, National Astronomical Observatory, Tokyo. The errors have been corrected in the present file. The notes to the catalog were computerized at the ADC and are flagged by asterisks in the main file. References: Slettebak A., Stock J., 1959, "A Finding List of Stars of Spectral Type F2 and Earlier in a North Galactic Pole Region", Astron. Abh. Hamburg. Sternw., 5, 105 (=1959AAHam...5..105S) Upgren, A.R. 1960, Astron. J., 65, 644 (=1960AJ.....65..644U) Upgren, A.R. 1984, Contr. Van Vleck Obs. No. 2, p. 19 for finder charts.
(End) C.-H. Joseph Lyu [Hughes STX/NASA] 10-Jun-1995
|The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line|