Astrometry and photometry of digitized plates of Baldone Schmidt telescope

During the 40-year photographic period of astronomical observations, the Baldone Astrophysical Observatory has accumulated more than 22,000 direct and 2,500 spectral images. In 2018, the digitization of direct astrophoto images with a resolution of 1200 dpi was completed. A processing methodology fo...

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Autores principales:	Eglitis Ilgmars, Andruk Vitaly
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	astronegative scanning processing of digitized records characteristic curve ubvr photometry g bp rp gaia dr2 asteroids pluto Astronomy QB1-991
Acceso en línea:	https://doaj.org/article/d6c8a6ac7758420ebbc61759a0b74196
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id	oai:doaj.org-article:d6c8a6ac7758420ebbc61759a0b74196
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spelling	oai:doaj.org-article:d6c8a6ac7758420ebbc61759a0b741962021-12-05T14:10:40ZAstrometry and photometry of digitized plates of Baldone Schmidt telescope2543-637610.1515/astro-2021-0002https://doaj.org/article/d6c8a6ac7758420ebbc61759a0b741962021-01-01T00:00:00Zhttps://doi.org/10.1515/astro-2021-0002https://doaj.org/toc/2543-6376During the 40-year photographic period of astronomical observations, the Baldone Astrophysical Observatory has accumulated more than 22,000 direct and 2,500 spectral images. In 2018, the digitization of direct astrophoto images with a resolution of 1200 dpi was completed. A processing methodology for obtaining the equatorial coordinates and photometric characteristics of the objects recorded in digitized astronegatives using the LINUX/MIDAS/ROMAFOT environment has been developed at the Main Astronomical Observatory of the National Academy of Sciences of Ukraine. Program package with success already works in seven observatories. A description of the operation of this program complex in stages and analysis of the obtained results is given. The steps describe the astrometric and photometric reduction process of digital records, as well as the reduction of the obtained instrumental magnitudes to the Johnson UBVR photometric system. The methodology of characteristic curve construction in the case of one exposure is described in detail. From all digitized astrophotoplates to date Approximately 2200 V film negatives, 300 U plates and several R, B plates were processed. As a result, catalogs of the positions and magnitudes of Pluto, 1848 asteroids and comets were obtained. 31 new positions were recorded in the VizieR Pluto catalog VI/155. It was found that the root-mean-square errors of the reduction of the measured coordinates to the equatorial coordinate system of the Tycho-2 catalog have values σRA,DEC= 0.1-0.2”, and the root-mean-square errors of the reduction of instrumental photometric quantities m to the Johnson system of stellar UBVR-values are also in within σUBVR = 0.1 − 0.2m.Eglitis IlgmarsAndruk VitalyDe Gruyterarticleastronegativescanningprocessing of digitized recordscharacteristic curveubvr photometrygbprp gaia dr2asteroidsplutoAstronomyQB1-991ENOpen Astronomy, Vol 30, Iss 1, Pp 12-23 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	astronegative scanning processing of digitized records characteristic curve ubvr photometry g bp rp gaia dr2 asteroids pluto Astronomy QB1-991
spellingShingle	astronegative scanning processing of digitized records characteristic curve ubvr photometry g bp rp gaia dr2 asteroids pluto Astronomy QB1-991 Eglitis Ilgmars Andruk Vitaly Astrometry and photometry of digitized plates of Baldone Schmidt telescope
description	During the 40-year photographic period of astronomical observations, the Baldone Astrophysical Observatory has accumulated more than 22,000 direct and 2,500 spectral images. In 2018, the digitization of direct astrophoto images with a resolution of 1200 dpi was completed. A processing methodology for obtaining the equatorial coordinates and photometric characteristics of the objects recorded in digitized astronegatives using the LINUX/MIDAS/ROMAFOT environment has been developed at the Main Astronomical Observatory of the National Academy of Sciences of Ukraine. Program package with success already works in seven observatories. A description of the operation of this program complex in stages and analysis of the obtained results is given. The steps describe the astrometric and photometric reduction process of digital records, as well as the reduction of the obtained instrumental magnitudes to the Johnson UBVR photometric system. The methodology of characteristic curve construction in the case of one exposure is described in detail. From all digitized astrophotoplates to date Approximately 2200 V film negatives, 300 U plates and several R, B plates were processed. As a result, catalogs of the positions and magnitudes of Pluto, 1848 asteroids and comets were obtained. 31 new positions were recorded in the VizieR Pluto catalog VI/155. It was found that the root-mean-square errors of the reduction of the measured coordinates to the equatorial coordinate system of the Tycho-2 catalog have values σRA,DEC= 0.1-0.2”, and the root-mean-square errors of the reduction of instrumental photometric quantities m to the Johnson system of stellar UBVR-values are also in within σUBVR = 0.1 − 0.2m.
format	article
author	Eglitis Ilgmars Andruk Vitaly
author_facet	Eglitis Ilgmars Andruk Vitaly
author_sort	Eglitis Ilgmars
title	Astrometry and photometry of digitized plates of Baldone Schmidt telescope
title_short	Astrometry and photometry of digitized plates of Baldone Schmidt telescope
title_full	Astrometry and photometry of digitized plates of Baldone Schmidt telescope
title_fullStr	Astrometry and photometry of digitized plates of Baldone Schmidt telescope
title_full_unstemmed	Astrometry and photometry of digitized plates of Baldone Schmidt telescope
title_sort	astrometry and photometry of digitized plates of baldone schmidt telescope
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/d6c8a6ac7758420ebbc61759a0b74196
work_keys_str_mv	AT eglitisilgmars astrometryandphotometryofdigitizedplatesofbaldoneschmidttelescope AT andrukvitaly astrometryandphotometryofdigitizedplatesofbaldoneschmidttelescope
_version_	1718371868849733632

Astrometry and photometry of digitized plates of Baldone Schmidt telescope

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