Narrow-band photometry of early-type stars Virtual Observatory Resource

Authors
  1. Morguleff N.
  2. Gerbaldi M.
  3. Published by
    CDS
Abstract

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.

Keywords
  1. narrow-band-photometry
  2. early-type-stars
Bibliographic source Bibcode
1975A&AS...19..189M
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/II/26A
IVOA Identifier IVOID
ivo://CDS.VizieR/II/26A

Access

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http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=II/26A
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https://vizier.iucaa.in/viz-bin/conesearch/II/26A/catalog?
http://vizieridia.saao.ac.za/viz-bin/conesearch/II/26A/catalog?

History

2016-08-08T12:30:52Z
Resource record created
2016-08-08T12:30:52Z
Created
2017-10-18T08:24:35Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr