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II/33    uvby-beta Photometry for Bright O-G0 Southern Stars (Gronbech+ 1976-77)

Four-colour uvby photometry for bright O to G0 type stars south of declination +10 degrees Gronbech B., Olsen E.H. <Astron. Astrophys. Suppl. Ser., 25, 213 (1976)> =1976A&AS...25..213G Photoelectric Hbeta photometry for bright O to G0 type stars south of declination +10 degrees Gronbech B., Olsen E.H. <Astron. Astrophys. Suppl. Ser., 27, 443 (1977)> =1977A&AS...27..443G
ADC_Keywords: Photometry, uvby, beta; Stars, bright Description: The catalog includes for each star as described in the title, the CDS number, HR number, V magnitude, (b-y) color index, m1, c1, beta, mean errors, sum of remarks. The rms errors of one observation are 0.013 mag, 0.005 mag, 0.006 mag and 0.008 mag for V, (b-y), m1 and c1, respectively. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file data.dat 110 2828 The catalogue
See also: II/215 : uvby-beta Catalogue (Hauck+ 1997), references 137 (uvby data) and 164 (H-beta data) Byte-by-byte Description of file: data.dat
Bytes Format Units Label Explanations
1- 5 I5 --- CDS CDS number for uvby beta photometry 6- 15 A10 --- ID *HR number 17- 22 F6.3 mag Vmag *? V magnitude of the UBV system 23- 28 F6.3 mag e_Vmag ? Mean error of one observation of Vmag 30- 35 F6.3 mag b-y ? (b-y) color index 36- 41 F6.3 mag e_b-y ? Mean error for (b-y) 43- 48 F6.3 mag m1 ? m1 - (v-b) - (b-y) 49- 54 F6.3 mag e_m1 ? Mean error for m1 56- 61 F6.3 mag c1 ? c1 = (u-v) - (v-b) 62- 67 F6.3 mag e_c1 ? Mean error for c1 69- 72 F4.1 --- P1 *? Sum of the weights for uvby photometry 74- 75 I2 --- M1 ? Number of nights the star was observed 79 A1 --- rem1 An asterisk draws attention to a note 87- 91 F5.3 mag beta *? Beta index 93- 97 F5.3 mag e_beta ? Mean error for beta 99-102 F4.1 --- P2 *? Sum of the weights for HBeta photometry 104-105 I2 --- M2 ? Number of nights the star was observed 107 A1 --- rem2 An asterisk draws attention to a note
Note on ID: HR number (from Yale Catalogue of Bright Stars, see catalog V/50) and components letters for multiple system For a few stars HD or CD numbers are given Note on Vmag: The value given is a weighted mean of the single observation. Most nights have been given weight 1, one night, weight 0.2, and the rest, weight 0.5 Note on P1, P2: For fainter stars, the individual observations have been scrutinized and rather low weights have been assigned according to the number of photons counted, etc. For a few stars the weight is zero but the photometry has nevertheless been given, because at least it tells if the star is of early or late type. Note on beta: (Crawford-Mander system): a weighted mean
History: uvby photometry data were in catalog II/30 . References: Gronbech B. and Olsen E.H. (1976) Astron. Astrophys. Suppl. Ser. 25, 213 Gronbech B. and Olsen E.H. (1977) Astron. Astrophys. Suppl. Ser. 27, 443
(End) Julie Anne Watko [SSDOO/ADC] 09-Apr-1996
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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