Reduction of CCD observations of visual binaries using the “Tepui” function as PSF^*

¹ Centro de Investigaciones de Astronomía, CIDA, 5101-A Mérida, Venezuela
² Observatorio Astronómico Ramón María Aller, Universidade de Santiago de Compostela, PO Box 197, Santiago de Compostela, Spain
³ Departamento de Matemáticas y Computación, Universidad de La Rioja, c./ Luis de Ulloa s/n, Logroño, Spain
⁴ Observatorio Astronomico Nacional, OAN, c./ Alfonso XII, 3, Madrid, Spain

Corresponding author: C. Abad, abad@cida.ve

Received: 19 March 2003
Accepted: 19 September 2003

Abstract

429 CCD measurements of relative positions and magnitude differences in V and R photometric bands for 165 visual double and multiple stars are given. CCD frames were taken at the 1.52 m Spanish telescope of the Spanish-German Center of Astronomy at Calar Alto (Almería, Spain). During the reduction process a “Tepui" function was used as the PSF function.