Abstract: The process of spectra extraction into catalogs from astronomical images, its difficulties and usage on the Digitized First Byurakan Survey (DFBS) plates are presented. The DFBS is the largest and the first systematic objective prism survey of the extragalactic sky. The large amount of photometric data is useful for variability studies and revealing new variables in the observed fields. New high proper motion stars can be discovered by a comparison of many observations of different observatories having large separation in years. The difficulty of DFBS images extraction is that extraction tools and programs are not adapted for such kind of plates. Astronomical images extraction process with usage of the Source Extractor (SE) tool is presented in this paper. The specificity of DFBS plates is that objects are presented in low-dispersion spectral form. It does not allow extraction tools to detect the objects exact coordinates and there is need of coordinates’ correction. Apart this, it is required to configure SExtractor for current type of the plates so, that the output results be as close to real as possible. The extraction of DFBS plates will allow the creation of astronomical catalogs’ database, which can be cross-correlated with known catalogs for investigation of the changes on sky during the years.

Keywords: IVOA, ArVO, DFBS, Plates extraction, SExtractor, VizieR, Astronomical catalogs

ACM Classification Keywords: I.4.1 Imaging geometry, Scanning I.4.3 Geometric correction, H.2.8 Data Mining, Scientific databases.

Link:

ASTRONOMICAL PLATES SPECTRA EXTRACTION OBJECTIVES AND POSSIBLE SOLUTIONS IMPLEMENTED ON DIGITIZED FIRST BYURAKAN SURVEY (DFBS) IMAGES

Aram Knyazyan, Areg Mickaelian, Hrachya Astsatryan

http://www.foibg.com/ijita/vol18/ijita18-3-p05.pdf