A&A Supplement series, Vol. 122, May I 1997, 559-569

Received July 2; accepted August 9, 1996

Secondary standard stars for CCD photometry

J.V. Clausen - S.S. Larsen - J.M. Garcia - A. Giménez - J. Storm

Send offprint request: J.V. Clausen, e-mail: jvc@astro.ku.dk

  Niels Bohr Institute for Astronomy, Physics, and Geophysics; Astronomical Observatory, Juliane Maries Vej 30, DK-2100 Copenhagen Ø, Denmark
  Departamento de Física, E.U.I.T. Industriales, UPM, Ronda de Valencia 3, E-28012 Madrid, Spain
  Laboratorio de Astrofísica Espacial y Física Fundamental, INTA, Apdo. 50727, E-28080 Madrid, Spain
  European Southern Observatory, Alonso de Cordova 3107, Casilla 19001, Santiago, Chile

Abstract:

Accurate standard uvby indices are presented for 73 southern B, A, F and G stars in the V magnitude range 8.2 to 10.9. They cover all three transformation regions of the uvby system (Olsen 1983) well. Standard indices are included for the 55 B, A, and F stars in the sample. Our results provide a useful set of secondary standards for CCD photometry with southern hemisphere 1-2 m class telescopes. A critical comparison with published photometry, in general based on fewer observations, is given.

keywords: Strömgren photometry -- astronomical data bases: miscellaneous -- stars: fundamental parameters -- stars: general

 
• 1. Introduction
• 2. Selection of secondary standards
• 3. Observation
• 4. Reduction and transformation
• 5. The secondary standards
• 6. Conclusions
• References