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Chromospheric spicules and solar corona
Yakunina, G. V.; Porfir'eva, G. A.
Results of recent observations of chromospheric spicules on the Sun, obtained during the last decades, are briefly reviewed. Data on spicules of different types and their possible counterparts on the solar disk have been collected. Their properties, such as lifetimes, length, thickness, velocities, connection with underlying magnetic field and sup…
Multiwavelength studies of X-ray selected extragalactic sample.
Mickaelian, A. M.; Abrahamyan, H. V.; Paronyan, G. M. +2 more
The joint catalogue of Active Galactic Nuclei selected from optical identifications of X-ray sources was created as a combination of two samples: Hamburg-ROSAT Catalogue (HRC) and Byurakan-Hamburg-ROSAT Catalogue (BHRC). Both are based on optical identifications of X-ray sources from ROSAT catalogues using low-dispersion spectra of Hamburg Quasar …
The nature of X-ray selected star candidates
Gigoyan, K. S.; Kostandyan, G. R.; Mickaelian, A. M. +3 more
The joint HRC/BHRC catalogue of optical identifications of ROSAT BSC and FSC X-ray sources is based on merging the Hamburg-ROSAT Catalogue (HRC) and Byurakan-Hamburg-ROSAT Catalogue (BHRC). Both have been made by optical identifications of X-ray sources based on low-dispersion spectra of the Hamburg QuasarSurvey (HQS) using the ROSAT Catalogues. H…