CCD astrometry and instrumental $\Delta V$ photometry of visual double stars
نویسندگان
چکیده
منابع مشابه
CCD photometry and astrometry for visual double and multiple stars of the HIPPARCOS catalogue I. Presentation of the large scale project
A description is given of the activities of an international working group created with the aim of obtaining both photometric and astrometric observations of visual double and multiple stars with angular separations in the range of one to fifteen arcseconds, that formed part of the HIPPARCOS Input Catalogue. The scientific aims and realisations of this European network are given. About 50 obser...
متن کاملAdaptive Optics Photometry and Astrometry of Binary Stars. Ii. a Multiplicity Survey of B Stars
We carried out a search for companions to B stars using the adaptive optics system of the Advanced ElectroOptical System 3.6 m telescope. We observed 70 B stars in the I band, finding 16 companions, 10 of which are newly discovered companions. For each system with a detected companion we give its measured astrometry and differential magnitude. We then put the observation in context of the syste...
متن کامل00 2 Improved Astrometry and Photometry for the Luyten Catalog . I . Bright Stars
We outline the construction of an updated version of the New Luyten TwoTenths (NLTT) catalog of high proper motion stars, which will contain improved astrometry and photometry for the vast majority of the ∼ 59, 000 stars in NLTT. The bright end is constructed by matching NLTT stars to Hipparcos, Tycho2, and Starnet; the faint end by matching to USNO-A and 2MASS. In this first paper, we detail t...
متن کاملCCD photometry of distant comets
While it is apparent that many comets are active beyond the canonical distance of 3 AU, few surveys of cometary activity have been performed in this region previously. Such a survey enables a more accurate determination of the proportion of comets that exhibit little or no outgassing at these distances. Results are presented of CCD observations of comets in the region of 3 AU ≤ Rh ≤ 6 AU obtain...
متن کاملGlobular Cluster Ages and Strömgren CCD Photometry
Strömgren uvby CCD photometry can be used in a variety of ways to constrain the absolute and relative ages of globular clusters. The reddening corrected v−y, c1 diagram offers the means to derive ages that are completely independent of distance. Very precise differential ages for clusters of the same chemical composition may also be determined from such 2–color plots, or from measurements of th...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy and Astrophysics Supplement Series
سال: 1999
ISSN: 0365-0138,1286-4846
DOI: 10.1051/aas:1999470