Access to Astronomical Catalogues

← Click to display the menu
J/AJ/106/591      OP Survey of Halo early-type stars             (Rodgers+ 1993)

Early-type stars in orthogonal halo fields. I. An objective-prism survey RODGERS A.W., ROBERTS W.H., WALKER I. Astron. J. 106, 591 (1993) =1993AJ....106..591R
ADC_Keywords: Surveys; Stars, early-type; Spectroscopy; Spectral types Abstract: The results are reported of an objective-prism survey of stars, mostly earlier than spectral type F5, for two fields at (l;b) = (90 deg and 270 deg; -45 deg). The fields, each of approximately 70 square degrees, are examined on plates taken with the Schmidt Telescope of the Anglo-Australian Observatory. The brightness range of the stars classified is 10 < V < 15. The prism combination used provides a dispersion of 600 A/mm at Hgamma. The spectral classification presented is defined by the equality of equivalent widths of Ca II K and Hdelta at type "F0" and the absence of Ca II K in stars with significant Balmer lines at type "A0". Positions listed in the catalog were measured on the Stromlo PDS microdensitometer. Most stars were subsequently identified with objects in the ST ScI-NASA-ESO Hubble Space Telescope Guide Star Catalog in which positions have an accuracy of near ± 1.0 arcsec. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2 85 435 Catalog of early-type stars
See also: J/AJ/106/1839 : Metal-rich halo A stars (Paper II.) (Rodgers+ 1993) Byte-by-byte Description of file: table2
Bytes Format Units Label Explanations
1- 9 A9 --- Object Object identifier 12- 13 I2 h RAh Right Ascension J2000.0 15- 16 I2 min RAm Right Ascension J2000.0 18- 22 F5.2 s RAs Right Ascension J2000.0 24 A1 --- DE- Declination sign 25- 26 I2 deg DEd Declination J2000.0 28- 29 I2 arcmin DEm Declination J2000.0 31- 34 F4.1 arcsec DEs Declination J2000.0 37- 43 A7 --- Sp Spectral type 44- 48 F5.1 mag Vmag magnitude 50- 85 A36 --- Comment Comments and other designations
Note: This table contains the results of the spectral classification discussed in detail in section 3 of the printed paper. Twelve objective prism plates with a prism giving a dispersion of 600 A/mm at Hgamma were obtained on request by the staff of the Schmidt Telescope Unit of the Anglo-Australian Observatory. The plates were examined visually with a low power microscope and the spectra classified by A.W. Rodgers. References: Rodgers A.W. & Roberts W.H., Paper III. =1993AJ....106.2294R Origin: AAS CD-ROM series, Volume 1, 1993
(End) Patricia Bauer [CDS] 27-Jun-1994
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

catalogue service