Mathematics – Logic
Scientific paper
Oct 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008pobeo..85..169k&link_type=abstract
Publications of the Astronomical Observatory of Belgrade, vol. 85, p. 169-180
Mathematics
Logic
Scientific paper
The Bulgarian National Astronomical Observatory (NAO) located close to the Rozhen ridge in the Rhodope Mountains near Smolyan, is presented with its history, functional characteristics and capabilities. Its latitude of 41° 41.5'N gives opportunities to investigate over 80{%} of the celestial sphere. The altitude of 1750 m lies within the height level that is most populated by observatories (1500-2500m). However, the astroclimate (mean seeing ˜ 2" and 35-40% clear sky time) is worse than that of the best world sites and corresponds to the mean for the continental Southern Europe. The light pollution near NAO is still the lowest among the Balkan sites, but some problems arise because of the ever growing illumination from the Pamporovo resort and the nearby towns of Smolyan and Chepelare. Equipped with 2-m, 70- and 60-cm stellar and 15-cm solar coronograph telescopes, NAO allows observations to be made for a wide range of optical astrophysical investigations: from Solar System bodies to extragalactic sources. The productivity of the 2-m telescope is quite comparable with that of other telescopes of similar class. Important studies (photometric, spectral, morphologic) of stellar clusters, flare stars, variable stars, nearby and distant galaxies were performed with/at the NAO telescopes. The 2-m telescope is very suitable for spectroscopic investigation with moderate resolution and it can be a subject of its future specialization in the era of giant telescopes of decameter size. The future of NAO can be connected with educational and conference activities if Bulgaria joins ESO - the most desirable way to develop astronomy in our land/in our country.
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