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J/AJ/104/1765       Faint Stroemgren photometry  (von Hippel 1992)

Galactic structure from faint Stroemgren photometry: the catalog of observations von Hippel T.A. <Astron. J. 104, 1765 (1992)> =1992AJ....104.1765V
ADC_Keywords: Photometry, uvby Abstract: We have initiated a faint photometric survey in the Stroemgren system covering ∼1 square degree and including 1238 objects in order to develop samples which best probe the thick disk population. The catalog of observations are presented here. They were acquired without kinematic or metallicity biases and are complete to V=17.3-18.5, depending on the field, for 810 early to relatively late type (K0 V or G5 III) stars. Photometric metallicities were derived for 508 stars and indicate a metal-poor stellar population, consistent with a mixture of thick disk and halo stars. While the Stroemgren u-band was not part of the survey, follow-up u-band observations of 32 survey objects indicate that intermediate color survey stars (0.3≤b-y≤0.5) are main-sequence or slightly evolved stars, while redder survey stars (b-y≥0.5) are giants. The survey catalog is available in electronic form upon request. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 75 1175 Stroemgren survey photometry table5.dat 56 32 uvby observations
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 4 F4.1 --- Field Field number 6- 8 I3 --- Id Identification number in the field 10- 11 I2 h RAh Right ascension (1950) 13- 14 I2 min RAm Right ascension (1950) 16- 19 F4.1 s RAs Right ascension (1950) 21 A1 --- DE- Declination sign 22- 23 I2 deg DEd Declination (1950) 25- 26 I2 arcmin DEm Declination (1950) 28- 29 I2 arcsec DEs Declination (1950) 31- 35 F5.2 mag Vmag Apparent V magnitude 37- 41 F5.2 mag b-y b-y colour index 43- 47 F5.2 mag v-b v-b colour index 49- 53 F5.3 mag e_vmag rms uncertainty on v magnitude 55- 56 I2 --- o_vmag Number of observations in v magnitude 58- 63 F6.3 mag e_bmag rms uncertainty on b magnitude 65- 66 I2 --- o_bmag Number of observations in b magnitude 68- 72 F5.3 mag e_ymag rms uncertainty on y magnitude 74- 75 I2 --- o_ymag Number of observations in y magnitude
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 4 F4.1 --- Field Field number 5 A1 --- --- [-] 6- 8 I3 --- Id Identification number in the field 11- 15 F5.2 mag Vmag V magnitude 17- 21 F5.2 mag b-y b-y colour index 23- 27 F5.2 mag v-b v-b colour index 29- 32 F4.2 mag u-v u-v colour index 36- 39 F4.2 mag e_ymag rms uncertainty on ymag 41- 44 F4.2 mag e_bmag rms uncertainty on bmag 47- 50 F4.2 mag e_vmag rms uncertainty on vmag 53- 56 F4.2 mag e_umag rms uncertainty on umag
History: Prepared via OCR at CDS.
(End) James Marcout, Patricia Bauer [CDS] 16-May-1997
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

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