II/22 Hα photometry of Southern F-G dwarfs (Peat, 1966)
Hα photometry of late-type stars II. F and G dwarfs south of the equator
Peat D.W.
<Mon. Not. R. Astron. Soc. 131, 467 (1966)>
=1966MNRAS.131..467P 1966MNRAS.131..467P
ADC_Keywords: Photometry, H-alpha ; Stars, late-type ; Stars, dwarfs
Description:
Hα photometry is presented for 172 southern F, G, and K type stars,
mostly of luminosity classes V and IV. The bands measured, using a
spectroscopic resolution of 3.4Å/mm, were:
Hα: 6546.5-6582.5Å
comparison regions: 6469.0-6505.0Å and 6624.0-6660.0Å.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 32 172 Photometric results (table I of paper, without
the spectral classification)
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Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [HD]
4- 9 I6 --- HD HD star identification (Cat. III/135)
11- 15 F5.2 mag (B-V) [0.2/1.5] Johnson (B-V) color
17- 22 F6.3 mag (U-B)c [1.1/2.2]? Cape system (U-B)C color
28- 32 F5.3 --- Ha [0.89/1.25] Hα ratio (1)
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Note (1): the Hα ratio is computed as the ratio of the intensities
of comparison regions to Hα, the intensities being relative
to the calibration lamps:
comparison region A = 6469.0-6505.0Å
Hα (region B) = 6546.5-6582.5Å
comparison region C = 6624.0-6660.0Å
Ha = 0.5 (A/AL + C/CL)/(B/BL)
(End) Gail L. Schneider [SSDOO/ADC], Francois Ochsenbein [CDS] 25-Sep-1995