Scanning results of images of the 60th declination zone of the FON project. Measurement reduction methods and characterization of the output catalog

Yatsenko, A. I.; Andruk, V. M.; Golovnya, V. V.; Pakulyak, L. K.; Ivanov, G. A.

doi:10.3103/s0884591311050084

Cited by 11 publications

(3 citation statements)

References 2 publications

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“…The preceding thorough investigations of scanner digitizing capabilities, have shown that in the case of proper methods of scanning [Andruk, 2012, Protsyuk, 2014a, Protsyuk, 2014b] and development of the appropriate software [Andruk, 2014, Andruk, 2015a, Andruk2015b, Protsyuk, 2014a, Protsyuk, 2014b, Protsyuk, 2015, Kazantseva, 2015, Vavilova, 2014, Yizhakevych, 2014Yizhakevych, 2015Yizhakevych, 2016, Yizhakevych, 2017] the feasibility exists to obtain coordinates and brightness of objects with the best accuracy possible for the photographic material. Two models of scanners were selected for FON plates digitizing, namely Microtek ScanMaker 9800XL TMA and Epson Expression 10000XL [Andruk, 2005a, Andruk, 2007, Andruk, 2010, Golovnya, 2010, Yatsenko, 2011. The initial variant of plate image processing supposed to use two frames of each plate turned one to another by 90° with the aim of excluding the scanner errors along the axis of the matrix movement direction.…”

Section: Ukrainian Virtual Observatory and New Prospects Of Fonmentioning

confidence: 99%

Fon: From Start to Finish

Pakuliak

Andruk

Golovnia

et al. 2016

OAP

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ABSTRACT. Almost 40-year history of FON project ended with the creation of the whole northern sky catalog of objects down to B ≤16.5 m . The idea of 4-fold overlapping of the northern sky with 6 wide-field astrographs has not been realized in full. For historical reasons it has been transformed into the 2-fold overlapping observational program of MAO NAS of Ukraine, resulted in three versions of the multimillion catalog of positions, proper motions, and B-magnitudes of stars. The first version of 1.2 million stars had been finished before the 2000s and is based on the AC object list. The measurements of plates were made by automatic measuring complex PARSEC, specially developed for massive photographic reviews. As the input list was limited by AC objects, the most part of stars on the FON plates remained unmeasured. Principles of workflow organization of such works formed the basis for the further development of the project using the latest IT-technologies. For the creation of the second and the third versions of the catalog, the list of objects was obtained as a result of total digitizing of plates and their image processing. The final third version contains 19.5 million stars and galaxies with the maximum possible for the photographic astrometry accuracy. The collection of plates, obtained in other observatories -participants of the project, are partially safe and can be used for the same astrometric tasks.

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Section: Ukrainian Virtual Observatory and New Prospects Of Fonmentioning

confidence: 99%

Fon: From Start to Finish

Pakuliak

Andruk

Golovnia

et al. 2016

OAP

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“…The equatorial coordinates and the photometric Bmagnitudes of registered objects were obtained for all scans using specially developed software in the LINUX/MIDAS/ROMAFOT (Andruk, 2010), which was described in (Yatsenko, 2011, Muminov, 2012, Protsyuk, 2014a. This software has already been successfully applied for the processing of the scanned images of Kyiv's part of the FON project to create a new photographic catalogue down to 16-17 stellar magnitude (Andruk, 2016a, Andruk, 2016b.…”

Section: Processes Of Digitization and Compiling The Catalogue Of Thementioning

confidence: 99%

CATALOGUE OF COORDINATES AND B-Magnitudes IN - 20є – +2є ZONE BASED ON THE ULUGH BEG ASTRONOMICAL INSTITUTE PART OF THE FON PROJECT

Yuldoshev

Muminov

Ehgamberdiev

et al. 2017

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ABSTRACT. Catalogue of 13.4 million stars down to 17.5 m was obtained in 2017 by using plates from the Kitab Observatory of Ulugh Beg Astronomical Institute (UBAI) of the Uzbek Academy of Sciences. Kitab's part of Photographic Sky Survey (Russian abbreviation is FON, in next contexts) project include more than 2600 photographic plates, exposed on the Double Astrograph of Zeiss (DAZ, D/F = 40/300, 69"/mm) from 1981 to 1996. Digitization of these plates was made by using Epson Expression 10000XL scanner with the 1200 dpi resolution. Catalogue includes objects from the 1963 plates in declination zone between -20° and +2° for middle epoch 1984.97. The equatorial coordinates of objects were determined in the Tycho-2 reference system and the B-magnitudes in the system of the photoelectric standards. Five participants from Uzbekistan, Germany and Ukraine have taken part in the processing of the digitized images. The average internal accuracy of the catalogue for one observation are 0.23" and 0.15 m for the equatorial coordinates and Bmagnitudes respectively. For the stars brighter than 14 m the errors are 0.09" and 0.05 m respectively. The analysis of the catalogue and its comparison with the several astrometric catalogues was done.

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“…Since November 2015 have been scanned more than 2000 astronegatives in the areas from -18° to 0° using the Epson Expression 10000XL flatbed scanner and its base software product designed for the scanning with a spatial resolution of 1200 dpi and the size of fields up to 13000 x 13000 pixels (one pixel is equal 1.45"). By this time, for the Kyiv's part of the FON project in MAO NASU was developed a special software in LINUX/MIDAS/ROMAFOT environment, which has already been tested in various works (Andruk, 2005a;Andruk, 2005b;Andruk, 2007;Andruk, 2010;Eglitis, 2016a;Eglitis, 2016b;Kazantseva, 2015;Protsyuk, 2014a;Protsyuk, 2014d;Protsyuk, 2015;Vavilova 2012a;Vavilova, 2012b;Vavilova, 2014;Yatsenko, 2011;Yizhakevych, 2014;Yizhakevych, 2015;Yizhakevych, 2016). For all scans of the Kitab's part of the FON project were already received rectangular coordinates and instrumental stellar magnitudes of all registered objects and compiled preliminary catalogues of stars for all zones.…”

Section: Introductionmentioning

confidence: 99%

The Equatorial Coordinates and B-Magnitudes of the Stars in the Southern Hemisphere Zones Based on the Digitized Astronegatives of Fon Project at the Ulugh Beg Astronomical Institute

Yuldoshev

Muminov

Ehgamberdiev

et al. 2016

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ABSTRACT. FON (Russian abbreviation of the Photographic Sky Survey) were carried out at 6 observatories. The Kitab Observatory (KO) of Ulugh Beg Astronomical Institute (UBAI) of the Uzbek Academy of Sciences (UzAS) was involved in this project from 1981 to 1996. For the observations the Double Astrograph of Zeiss (DAZ, D/F = 40/300, 69"/mm) was used. On the FON project about 2600 photographic plates were exposed. In October, 2015 digitization of these astroplates were started using EPSON Expression 10000XL flatbed scanner with the spatial resolution of 1200 dpi and completed in June, 2016. The first stage of the work is the processing of the 2000 photographic plates in zones of the southern hemisphere with the declination between 0 and -20 degrees. The 1704 plates have already been processed. The equatorial coordinates α, δ of stars and galaxies were determined in the system of the Tycho2 catalogue and the Bmagnitudes in the system of the photoelectric standards. UBAI UzAS, Tashkent (Uzbekistan), ASU, Andijan (Uzbekistan), WHO, Essen (Germany), RI NAO, Nikolaev (Ukraine), MAO NASU, Kyiv (Ukraine) have taken part in the processing of the digitized images. For the data reduction the MIDAS package and software, developed in the MAO NASU were used. Based on the results of the processing of the astronegatives in the sectors of right ascension from 0 hours to 24 hours and declination from -20° to 0° the internal errors of the catalogue were estimated. The errors calculated for all stars are 0.17" and 0.18 m respectively. For the stars brighter than 14 magnitude the errors are 0.08" and 0.07 m for the equatorial coordinates and B-magnitudes respectively.

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Scanning results of images of the 60th declination zone of the FON project. Measurement reduction methods and characterization of the output catalog

Cited by 11 publications

References 2 publications

Fon: From Start to Finish

Fon: From Start to Finish

CATALOGUE OF COORDINATES AND B-Magnitudes IN - 20є – +2є ZONE BASED ON THE ULUGH BEG ASTRONOMICAL INSTITUTE PART OF THE FON PROJECT

The Equatorial Coordinates and B-Magnitudes of the Stars in the Southern Hemisphere Zones Based on the Digitized Astronegatives of Fon Project at the Ulugh Beg Astronomical Institute

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