V. G. Orlov, C. A. Guerrero, and V. V. Voitsekhovich
Instituto de Astronomía, Universidad Nacional Autónoma de México, Apdo. Postal 70-264, 04510, México, D.F., Mexico. (orlov@astro.unam.mx).
Received 2013 December 6.
Accepted 2014 February 5.
]]> RESUMEN
Presentamos mediciones de estrellas binarias mediante interferometría de motas (speckle), realizadas en septiembre, octubre y noviembre de 2009 con el telescopio de 1.5-m del Observatorio Astronómico Nacional en SPM (México). Reportamos los resultados de 645 medidas de 504 pares de estrellas, con una magnitud límite para la primaria de V = 12.3. Las separaciones angulares van desde 0'' .144 hasta 5'' .17. 396 pares tienen separaciones de menos de 1''. El error medio en las separaciones es de 0'' .033, y el de los ángulos de posición, 0°.9. La ambigüedad de 180°, usual en este tipo de mediciones, fue corregida para la mayoría de los pares usando observaciones de otros autores.
ABSTRACT
We present speckle interferometric measurements of binary stars performed during September, October and November of 2009 with the 1.5-m telescope of the Observatorio Astronómico Nacional at SPM (Mexico). We report here the results of 645 measurements of 504 pairs of stars with a primary limiting magnitude of V = 12.3. The measured angular separations range from 0'' .144 to 5'' .17. 396 pairs have separations of less than 1''. The mean error in separation is 0'' .033 and in position angle, 0° .9. The usual 180° ambiguity was corrected for the majority of position angles by comparison with observations performed by other observers.
Key Words: binaries: visual — stars: fundamental parameters — techniques: high angular resolution — techniques: interferometric.
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ACKNOWLEDGMENTS
]]> The speckle interferometry program at the OAN telescopes is supported by the Direccion General de Asuntos del Personal Academico (UNAM, México) under project IN104910.
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