2033 II/33 uvby-beta Photometry for Bright O-G0 Southern Stars B Gronbech E H Olsen Astron. Astrophys. Suppl. Ser. 25 213 1976 1976A&AS...25..213G B Gronbech E H Olsen Astron. Astrophys. Suppl. Ser. 27 443 1977 1977A&AS...27..443G II/215 : uvby-beta Catalogue (Hauck+ 1997), references 137 (uvby data) and 164 (H-beta data) 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 Photometry, uvby, beta Stars, bright 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.

CDS CDS number for uvby beta photometry --- ID HR number 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 --- Vmag V magnitude of the UBV system 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 mag e_Vmag Mean error of one observation of Vmag mag b-y (b-y) color index mag e_b-y Mean error for (b-y) mag m1 m1 - (v-b) - (b-y) mag e_m1 Mean error for m1 mag c1 c1 = (u-v) - (v-b) mag e_c1 Mean error for c1 mag P1 Sum of the weights for uvby photometry 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. --- M1 Number of nights the star was observed --- rem1 An asterisk draws attention to a note --- beta Beta index (Crawford-Mander system): a weighted mean mag e_beta Mean error for beta mag P2 Sum of the weights for HBeta photometry --- M2 Number of nights the star was observed --- rem2 An asterisk draws attention to a note --- Julie Anne Watko SSDOO/ADC 1996Apr09 UNKNOWN UNKNOWN uvby photometry data were in catalog II/30 . II_33.xml