منابع مشابه
Reduction of CCD observations with scanning Fabry-Perot interferometer
The algorithms used for reduction of data obtained in a Fabry-Perot interferometer mode of the new focal reducer of the 6m telescope SCORPIO are described. The main attention is focused on the procedures of photometry correction of channels and night sky emission subtraction, which is especially important for observations with a CCD in comparison with a photon counter. The influence of various ...
متن کاملCCD - based observations of PG 0856 + 121 and a theoretical analysis of its oscillation modes ⋆
BV RI CCD-based and near-IR (J) imaging, together with unfiltered photometry of the hot subdwarf B star PG 0856+121 are reported. Two close, faint, red, point-like sources are resolved. They account for the previously reported IR excess observed in this hot subdwarf. In addition, the new unfiltered differential photometry of PG 0856+121 confirms its previously reported pulsational nature. A com...
متن کاملNew Ccd Observations of the Rr Lyrae Variables in the Oosterhoff Type Ii Cluster M9
CCD observations have been used to study sixteen of the previously known variables in the Oosterhoo type II globular cluster M9. The properties of the RR Lyrae variables in M9 are compared with those in the Oosterhoo type I cluster M3. Methods devised by Simon, Jurcsik and Kovv acs have been used to derive physical parameters for the stars from Fourier analysis. The mean metal abundance so deri...
متن کاملCcd Observations of the Rr Lyrae Variables in the Globular Cluster Ngc 5897
CCD observations for 10 (6 previously known and 4 newly discovered) of the 11 RR Lyrae variables in NGC 5897 have been analysed. The period-luminosity and period-amplitude plots indicate that the population of RR Lyrae variables in NGC 5897 includes 3 fundamental mode, 4 first-overtone and 4 second-overtone variables with mean periods 0.828, 0.459 and 0.343 respectively. The variables have prop...
متن کاملCCD and photon-counting photometric observations of asteroids carried out at Padova and Catania observatories
We present the results of observational campaigns of asteroids performed at Asiago Station of Padova Astronomical Observatory and at M.G. Fracastoro Station of Catania Astrophysical Observatory, as part of the large research programme on Solar System minor bodies undertaken since 1979 at the Physics and Astronomy Department of Catania University. Photometric observations of six Main-Belt astero...
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ژورنال
عنوان ژورنال: Astronomy and Astrophysics Supplement Series
سال: 1996
ISSN: 0365-0138,1286-4846
DOI: 10.1051/aas:1996270