STRÖMVIL PHOTOMETRY AT CASLEO

PINTADO, O.I.

Baltic Astronomy

Institute of Theoretical Physics and Astronomy

Lugar: Vilnius, Lituania; Año: 2006

1392-0049

The aim of this proyect, named CLUSTERS AND ASTEROIDS is to study southern globular clusters stars and determined all the physical parameters available with this photometric system. In 2000 we started our observations at CASLEO with the Strömvil System and we have 5 observing runs. The observing runs are tipically three to four days. In this presentation we will talk about the CASLEO observatory, the telescope, the instruments, seeing and weather conditions and about our experience observing with this filters. During the first three observing runs only the 4 Strömgen filters were available, only in the last two observing runs we have the complete set of filters. There are no standard for the Vilnius filters in the southern hemisphere, so we can only measure the instrumental magnitud for this filters. We have observe one cluster (NGC 5904) which was also observed at the VATT, for comparison, which will give us an idea of the quality of the data we get at CASLEO. We plan to start our analyses with NGC 6397, which was observed by Davis Phiplip at CTIO and, as it was observed in several runs we could also find or re-find the blue straglers.