2026A II/26A Narrow-band photometry of Early-type stars N Morguleff M Gerbaldi Astron. Astrophys. Suppl. Ser. 19 189 1975 1975A&AS...19..189M Photometry Stars, early-type A compilation of the photoelectric measurements in the Barbier-Morguleff system is presented for 773 stars of spectral types O8 to F6. 706 stars have been measured at least twice. The passbands (in Angstroems) and the mean photometric errors of the indexes C(j)-C(2) (in magnitudes) are: ----------------------- Band Interval m.e. ----------------------- C(1) 6000-5900 0.0318 C(2) 5000-4900 --- C(3) 4905-4815 0.0073 C(4) 4380-4310 0.0100 C(5) 4070-4010 0.0102 C(6) 3965-3925 0.0201 C(7) 3780-3720 0.0195 C(8) 3650-3575 0.0189 ----------------------- Regarding the catalog Pass Bands Morguleff and Gerbaldi (1975) note the following: These spectral intervals permit the determination of certain physical characteristics .... The pass bands 1 and 5 lead us to calculate red and blue gradients. The equivalent widths of the H(beta), H(gamma) lines of hydrogen and the K lines of Ca II are derived from band 3, 4, and 6. Bands 7 and 8 measure the Balmer jump. Listed in the catalog file are the normalized magnitudes corresponding to the above pass bands. The normalized magnitude of a pass band, C(j), is defined as the color index of the magnitude in the band minus the magnitude of the second band, C(2). See Morguleff and Gerbaldi (1975) for a brief discussion of conservation of the system and mean errors across all stars.

Name HD or BD (if starting with a + sign) identification HD or BD number of the object. Only the last two objects have BD rather than HD numbers. number= HD or BD number of the object. Only the last two objects have BD rather than HD numbers. number= The normalized magnitudes in seven of the eight pass bands (see "Pass Bands"). C(2) is always equal to zero, by definition. number= Number of measurements contributing to the above values. --- Var 'V' indicates a variable star number= HD or BD number of the object. Only the last two objects have BD rather than HD numbers. number= The normalized magnitudes in seven of the eight pass bands (see "Pass Bands"). C(2) is always equal to zero, by definition. number= Number of measurements contributing to the above values. --- c1 Index C(1)-C(2). The normalized magnitudes in seven of the eight pass bands (see "Pass Bands"). C(2) is always equal to zero, by definition. number= HD or BD number of the object. Only the last two objects have BD rather than HD numbers. number= The normalized magnitudes in seven of the eight pass bands (see "Pass Bands"). C(2) is always equal to zero, by definition. number= Number of measurements contributing to the above values. mag c3 Index C(3)-C(2). number= HD or BD number of the object. Only the last two objects have BD rather than HD numbers. number= The normalized magnitudes in seven of the eight pass bands (see "Pass Bands"). C(2) is always equal to zero, by definition. number= Number of measurements contributing to the above values. mag c4 Index C(4)-C(2). number= HD or BD number of the object. Only the last two objects have BD rather than HD numbers. number= The normalized magnitudes in seven of the eight pass bands (see "Pass Bands"). C(2) is always equal to zero, by definition. number= Number of measurements contributing to the above values. mag c5 Index C(5)-C(2). number= HD or BD number of the object. Only the last two objects have BD rather than HD numbers. number= The normalized magnitudes in seven of the eight pass bands (see "Pass Bands"). C(2) is always equal to zero, by definition. number= Number of measurements contributing to the above values. mag c6 Index C(6)-C(2). number= HD or BD number of the object. Only the last two objects have BD rather than HD numbers. number= The normalized magnitudes in seven of the eight pass bands (see "Pass Bands"). C(2) is always equal to zero, by definition. number= Number of measurements contributing to the above values. mag c7 Index C(7)-C(2). number= HD or BD number of the object. Only the last two objects have BD rather than HD numbers. number= The normalized magnitudes in seven of the eight pass bands (see "Pass Bands"). C(2) is always equal to zero, by definition. number= Number of measurements contributing to the above values. mag c8 Index C(8)-C(2). number= HD or BD number of the object. Only the last two objects have BD rather than HD numbers. number= The normalized magnitudes in seven of the eight pass bands (see "Pass Bands"). C(2) is always equal to zero, by definition. number= Number of measurements contributing to the above values. mag Obs Number of measurements Number of measurements contributing to the above values. number= HD or BD number of the object. Only the last two objects have BD rather than HD numbers. number= The normalized magnitudes in seven of the eight pass bands (see "Pass Bands"). C(2) is always equal to zero, by definition. number= Number of measurements contributing to the above values. --- e_c1 Mean error on c1 number=1 the mean error is only computed if Obs>1 mag e_c3 Mean error on c3 number=1 the mean error is only computed if Obs>1 mag e_c4 Mean error on c4 number=1 the mean error is only computed if Obs>1 mag e_c5 Mean error on c5 number=1 the mean error is only computed if Obs>1 mag e_c6 Mean error on c6 number=1 the mean error is only computed if Obs>1 mag e_c7 Mean error on c7 number=1 the mean error is only computed if Obs>1 mag e_c8 Mean error on c8 number=1 the mean error is only computed if Obs>1 mag Francois Ochsenbein CDS and N. Paul Kuin ADC/SSDOO/NASA 1995Mar29 UNKNOWN UNKNOWN * Catalogue received at CDS in 1975 (punched cards) * January 1995: standardised description, added 'V' symbol for variable stars listed in the paper. * March 1995: included pertinent information from original ADC documentation to the catalog by N. Paul Kuin. II_26A.xml