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II/33 uvby-beta Photometry for Bright O-G0 Southern Stars (Gronbech+ 1976-77)
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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
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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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
data.dat 110 2828 The catalogue
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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
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Bytes Format Units Label Explanations
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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
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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
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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
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(End) Julie Anne Watko [SSDOO/ADC] 09-Apr-1996