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, Q.; Muminov, M.; Ehgamberdiev, Sh. A.; Usmanov, O.; Relke, H.; Protsyuk, Yu. I.; Kovylianska, O. E.; Protsyuk, S. V.; Andruk, V. M.

doi:10.18524/1810-4215.2016.29.85182

Cited by 9 publications

(6 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The interim results of the progress and results of the creation of the Kitab's part of the FON project were previously reported: Gamov‐2016 (Odessa, Ukraine) (Yuldoshev et al ()), Astroplate‐2016 (Prague, Czech) (Ehgamberdiev ()), and others (Andruk et al (), Muminov et al (), Muminov et al (), Muminov et al (), Yuldoshev et al ()).…”

Section: Resultsmentioning

confidence: 84%

Catalog of equatorial coordinates and B‐magnitudes of the Kitab's part of the FON project

Yuldoshev¹,

Protsyuk

Relke³

et al. 2019

Astron Nachr

Self Cite

View full text Add to dashboard Cite

We present a catalog of stars with equatorial coordinates α and δ and B‐magnitudes of stars for the Kitab's section of the FON project (FON‐Kitab). The photographic plates of the FON project were exposed on the double telescope Double Zeiss Astrograph (DAZ, D/F = 40/300, 69″/mm) at the Kitab observatory of the Republic of Uzbekistan. A total of 1963 plates, with size of 5.5 × 5.5 degrees (30 × 30 cm or 13,000 × 13,000 pixels) were digitized by Epson Expression 10000XL scanner with 1,200 dpi resolution. The reduction of plates was processed in the four astronomical organizations: Ulugh Beg Astronomical Institute (UBAI) of the Uzbek Academy of Sciences; the Mykolaiv Astronomical Observatory of the Ministry of Education and Science of Ukraine; the Walter Hohmann Observatory of Essen, Germany; and the Main Astronomical Observatory of the National Academy of Sciences of Ukraine. The catalogue contains nearly 13.4 million stars and galaxies from 0° to −20° according to declination down to B = 17. m5 in the middle epoch of observation 1985.0. The coordinates of the stars and galaxies were obtained from the Tycho‐2 catalogue, while B‐magnitudes were determined in the system of photoelectric standards. The mean internal errors of the new catalogue for all objects were σαδ = 0. ′′23 and σB = 0. m15 (for the stars in the range of B = 5m − 14m, the errors are σαδ = 0. ′′085 and σB = 0. m054 for the equatorial coordinates and the B‐magnitudes, respectively). The convergence between the calculated and reference positions was σαδ = 0. ′′042. The convergence with the photoelectric B‐magnitudes is σB = 0. m16. External comparison with UCAC‐4 based on 9,892,697 or 73.8% cross‐identified objects yield σαδ = 0. ′′26.

show abstract

Section: Resultsmentioning

confidence: 84%

Catalog of equatorial coordinates and B‐magnitudes of the Kitab's part of the FON project

Yuldoshev¹,

Protsyuk

Relke³

et al. 2019

Astron Nachr

Self Cite

View full text Add to dashboard Cite

show abstract

“…The Kitab part of FON project has been finished in the zone of DE from -20.5 to +2.5 degrees. The catalog of positions and B-magnitudes of 13.4 million objects brighter than B ≤ 17.5 m for the mean epoch 1985.0 has been created from the digital data of 1963 plates processing (Yuldoshev, 2016, Yuldoshev, 2017aYuldoshev, 2017b). Digitizing of astronegatives was carried out using commercial scanner Epson Expression 10000XL.…”

Section: Components Of the Fon Compiled Catalogmentioning

confidence: 99%

On the Fon Astroplate Project Accomplishment

Andruk

Pakuliak

Eglitis

et al. 2019

OAP

Self Cite

View full text Add to dashboard Cite

The plan of the photographic survey of the northern sky (FON) was proposed in 1976 in Golosiiv observatory (now MAO NAS of Ukraine) by I. Kolchinsky and A. Onegina. The final project of the Compiled FONAC catalog (FON Astrographic Catalog)is based on the digital data of photographic plates exposed at four observatories. They are MAO NAS of Ukraine (Kyiv, Ukraine), Kitab astronomical observatory (Tashkent, Uzbekistan), Hissar astronomical observatory (Dushanbe, Tajikistan), and Baldone observatory (Latvia)). The total amount of plates is 5700. The result is expected to be the catalog of positions and B-magnitudes of stars covered the declination area from -20 to 90 degrees. The estimated mean epoch of the catalog is ~1987. The limiting B-magnitude is ~17.5 m . The reference system for positions is Tycho-2. B-magnitudes are being obtained in the system of photoelectric standards. The resulted data of photometric reduction are corrected for the photometric color equation in B magnitudes. The complement for the photometric content of the catalog is U and V magnitudes of stars being obtained from the processing of 5400 plates from the glass collection of 1.2 m Schmidt telescope in Baldone. Photometric data of bright stars with V < 8.5 m U, B,V magnitudes cannot be obtained from photographic material, so those objects will gain photometric data from photoelectric catalogs. The catalog will be complemented with proper motions from GAIA.

show abstract

“…As a rule, the photometric standards for characteristic curve restoration from astronegatives, exposed in Johnson U, B, V or R bands (hereafter U, B, V, R ), are photoelectric data of stars in the same system (Relke, 2015). If the negative was obtained with two exposureslong and short ones (Andruk, 2012), the problem of the whole characteristic curve restoration is simplified and successfully solved in practice as it was done when FON project had been realizing (Akhmetov, 2018;Andruk, 2016a;Andruk, 2016b;Yuldoshev, 2016;Yuldoshev, 2017a;Yuldoshev, 2017b) or for other programs as it presented in (Protsyuk, 2017;Yizhakevych, 2015;Shatokhina, 2018).…”

Section: Introductionmentioning

confidence: 99%

Photometry of Stars for Astronegatives With a Single Exposure

Andruk

Eglitis

Protsyuk

et al. 2019

OAP

View full text Add to dashboard Cite

The paper discusses the construction of characteristic curves for various astronegatives with a single exposure. Particular attention is paid to the question of extrapolation of the characteristic curve for the region of the weakest stars in the absence of standards. A new method for constructing an individual characteristic curve for digitized films and plates in the UBVR system has been proposed and implemented. The processing of frames of digitized plates and films with sky areas is carried out using LINUX/MIDAS/ROMAFOT software tools. ROMAFOT application allows us to extract astrometric rectangular coordinates X,Y and photometric characteristics such as instrumental photometric magnitudes m, FWHM, and the intensity in the center of the star image Ic for all fixed objects on each astronegative. For all frames, the connection between instrumental photometric values m with stellar magnitudes in any system (Johnson UBVR, Tycho-2 or GAIA catalogs, etc.) is not linear and multipurpose. It is presented as the characteristic curve for each astronegative. In general, the characteristic curve is approximated by a 5-degree polynomial and should take into account the color equation and the photometric field error. In practice, the most and the sometimes unsolvable problem is the lack of photometric standards for the flat part of the characteristic curve (the region of faint and extremely faint stars). As a rule, the photometric standards for characteristic curve restoration from astronegatives, exposed in Johnson U, B, V or R bands (hereafter U, B, V, R ), are photoelectric data of stars in the same system. The present work concentrates on the issue of a correct definition of stellar U, B, V, R magnitudes from astronegatives obtained with a single exposition in the case when photometric standards are absent for the flat part of the characteristic curve. Currently, the determination of U, B, V, R magnitudes of stars and other space objects is in progress for astronegatives with the single exposure obtained in the frameworks of selected observational projects.

show abstract

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

Cited by 9 publications

References 8 publications

Catalog of equatorial coordinates and B‐magnitudes of the Kitab's part of the FON project

Catalog of equatorial coordinates and B‐magnitudes of the Kitab's part of the FON project

On the Fon Astroplate Project Accomplishment

Photometry of Stars for Astronegatives With a Single Exposure

Contact Info

Product

Resources

About