{"id":283,"date":"1970-01-05T05:09:18","date_gmt":"1970-01-05T03:09:18","guid":{"rendered":"http:\/\/195.96.236.171\/ratio\/?page_id=283"},"modified":"1970-01-05T05:09:23","modified_gmt":"1970-01-05T03:09:23","slug":"technical-parameters","status":"publish","type":"page","link":"http:\/\/195.96.236.171\/ratio\/?page_id=283","title":{"rendered":"Technical Parameters"},"content":{"rendered":"\n

National Astronomical Observatory – Rozhen<\/strong><\/p>\n\n\n\n

<\/p>\n\n\n\n

National Astronomical Observatory (NAO)<\/a> – Rozhen is situated in the Rhodope Mountains at 1750 m altitude and coordinates: <\/p>\n\n\n\n

longitude: 1h<\/sup> 38m<\/sup> 58s<\/sup> and latitude: 41\u00b0 41′ 48”. <\/p>\n\n\n\n

The astronomical observatory is the biggest one-time Bulgarian investment in scientific infrastructure and a leading astronomical center in the South-East Europe. The 2-m RCC telescope of Rozhen Observatory is equipped with four new professional CCD cameras, coud\u00e9 and \u00e9shelle spectrographs, a two-channel focal reducer, broad band and interference set of filters. <\/p>\n\n\n\n

Observations with the focal reducer and in direct RC focus are carried out with ANDOR iKon-L BEX2-DD and ANDOR iKon-L E2V 42-40 CCD cameras (2048\u00d72048 pixels, 13.5\u00d713.5 \u03bcm size). The coud\u00e9-spectrograph of the 2-m RCC telescope at NAO – Rozhen is a powerful instrument that allows obtaining of stellar spectra with a high resolution, \u201csignal-to-noise\u201d ratio of about 1000, and to measure velocities in space with an accuracy of 500 m\/s. The coud\u00e9-spectrograph is equipped with ANDOR Newton 940 CCD camera (2048\u00d7512 pixels, 13.5\u00d713.5 \u03bcm size). The \u00e9shelle-spectrograph is a cross-dispersed, bench-mounted, fiber-fed instrument giving a resolution from \u223c30000 to\u223c45000. The spectral range obtained in one single image is from 3900 to 9000 \u00c5. The spectrograph is equipped with ANDOR iKon-L BEX2-DD CCD camera (2048\u00d72048 pixels, 13.5\u00d713.5 mm size).<\/p>\n\n\n\n

NAO – Rozhen has at its disposal and two small telescopes for optical observations: the 50\/70 cm Schmidt telescope and 60 cm Cassegrain telescope. Both telescopes are equipped at present with CCD cameras with thermo-electric cooling: FLI PL 9000 (3056\u00d73056 pixels, 12\u00d712 \u03bcm size) at the Cassegrain telescope and FLI PL 16803 (4096\u00d74096 pixels, 9\u00d79 \u03bcm size) at the Schmidt telescope. The relatively big field of observation makes the telescopes suitable for photometry of variable and fast moving objects, as well as of nearby galaxies. From 2005 NAO – Rozhen has also a 15 cm Lyot-coronagraph with H-alpha filter, designed for observations of quiescent, eruptive, and active prominences in the low solar corona; and a solar refractor, which is in preparation for observations in white-light and H-alpha line (the solar activity in the photosphere and chromosphere). A center for visitors, equipped with a 18 cm telescope, conference room and small museum, are situated in NAO – Rozhen, too.<\/p>\n\n\n\n

Astronomical Observatory Belogradchik<\/strong><\/p>\n\n\n\n

The Astronomical Observatory Belogradchik (AOB)<\/a> was built near the Belogradchik citadel at 610 m altitude and coordinates:<\/p>\n\n\n\n

longitude 1h<\/sup> 30m<\/sup> 41s<\/sup> and latitude 43\u00b0 37′ 22”<\/p>\n\n\n\n

In 1965 a 60 cm Cassegrain telescope for professional research in astrophysics was ordered in Carl Zeiss Jena. For a decade this was the largest professional telescope in Bulgaria. Currently two main modes of astronomical observations are carried out at 60 cm Cassegrain telescope in AOB: with FLI PL 9000 CCD camera (3056\u00d73056 pixels, 12\u00d712 \u03bcm size) and with a fully computer controlled single channel photometer. <\/p>\n\n\n\n

In\n2019, we are planning to buy new CCD cameras for all small telescopes\nin NAO-Rozhen and AO Belogradchik.<\/p>\n","protected":false},"excerpt":{"rendered":"

National Astronomical Observatory – Rozhen National Astronomical Observatory (NAO) – Rozhen is situated in the Rhodope Mountains at 1750 m altitude and coordinates: longitude: 1h 38m 58s and latitude: 41\u00b0 41′ 48”. The astronomical observatory is the biggest one-time Bulgarian investment in scientific infrastructure and a leading astronomical center in the South-East Europe. The 2-m […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-283","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"http:\/\/195.96.236.171\/ratio\/index.php?rest_route=\/wp\/v2\/pages\/283","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/195.96.236.171\/ratio\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/195.96.236.171\/ratio\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/195.96.236.171\/ratio\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/195.96.236.171\/ratio\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=283"}],"version-history":[{"count":1,"href":"http:\/\/195.96.236.171\/ratio\/index.php?rest_route=\/wp\/v2\/pages\/283\/revisions"}],"predecessor-version":[{"id":291,"href":"http:\/\/195.96.236.171\/ratio\/index.php?rest_route=\/wp\/v2\/pages\/283\/revisions\/291"}],"wp:attachment":[{"href":"http:\/\/195.96.236.171\/ratio\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=283"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}