/ftp/cats/ii/26A



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II/26A           Narrow-band photometry of early-type stars   (Morguleff+, 1975)
The following files can be converted to FITS (extension .fit or fit.gz)
	catalog.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=II/26A
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drwxr-xr-x 351 cats archive 8192 Mar 25 10:13 [Up] drwxr-xr-x 2 cats archive 327 Jan 12 2023 [TAR file] -rw-r--r-- 1 cats archive 462 Dec 19 2022 .message -r--r--r-- 1 cats archive 4668 May 6 2020 ReadMe -rw-r--r-- 1 cats archive 664 Aug 8 2016 +footg5.gif -rw-r--r-- 1 cats archive 6846 Aug 8 2016 +footg8.gif -r--r--r-- 1 cats archive 95085 Jan 12 1995 catalog.dat [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : II/26A Narrow-band photometry of early-type stars (Morguleff+, 1975) ================================================================================ Catalogue of early-type stars measured in a narrow-band photometric system Morguleff N., Gerbaldi M. <Astron. Astrophys. Suppl. Ser. 19, 189 (1975)> =1975A&AS...19..189M ================================================================================ ADC_Keywords: Photometry, narrow-band ; Stars, early-type Description: 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.