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- Title
One-meter Schmidt telescope of the Byurakan Astrophysical Observatory: New capabilities.
- Authors
Dodonov, S.; Kotov, S.; Movsesyan, T.; Gevorkyan, M.
- Abstract
In 2013-2015 the Laboratory of spectroscopy and photometry of extragalactic objects (LS-PEO) of the Special Astrophysical Observatory together with Armenian specialists upgraded the 1-m Schmidt telescope of the Byurakan Astrophysical Observatory of the National Academy of Sciences of Armenia. We completely redesigned the control system of the telescope: we replaced the actuating mechanisms, developed telescope control software, and made the guiding system. We reworked and prepared a 4k × 4k Apogee (USA) liquid-cooled CCD with RON ~ 11.1 e , a pixel size of 0.″868, and field of view of about 1□°, and in October 2015 mounted it in the focus of the telescope. The detector is equipped with a turret bearing 20 intermediate-band filters ( FWHM = 250 Å) uniformly covering the 4000-9000 Å wavelength range, five broadband filters ( u, g, r, i, z SDSS), and three narrow-band filters (5000 Å, 6560 Å and 6760 Å, FWHM = 100 Å). During the first year of test operation of the 1-m telescope we performed pilot observations within the framework of three programs: search for young stellar objects, AGNevolution, and stellar composition of galaxy disks.We confirmed the possibility of efficiently selecting of young objects using observations performed in narrow-band H α and [SII] filters and the intermediate-band 7500 Å filter. Three-hours long exposures with SDSS g-, r-, and i-band filters allow us to reach the surface brightness level of 28/□″ when investigating the stellar content of galaxy disks for a sample of nine galaxies. We used observations performed with the 1-m telescope in five broadband (SDSS u, g, r, i, and z) and 15 intermediate-band filters (4000-7500 Å) to construct a sample of quasar candidates with 0.5 < z < 5 (330 objects) in about one-sq. degree SA68 field complete down to R = 23. Spectroscopic observations of 29 objects (19.5 < R < 22) carried out at the 6-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences confirmed the quasar nature of 28 objects.
- Subjects
SCHMIDT telescopes; ASTROPHYSICS; PHOTOMETRY; GALAXIES; STELLAR collisions
- Publication
Astrophysical Bulletin, 2017, Vol 72, Issue 4, p473
- ISSN
1990-3413
- Publication type
Article
- DOI
10.1134/S1990341317040113