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Wide-Field Plate Archive of the University Observatory Jena

Autor: Poghosyan, A. V., Pfau, W., Tsvetkova, K. P., Mugrauer, M., Tsvetkov, M. K., Hambaryan, V. V., Neuhaeuser, R., Kalaglarsky, D. G.

We present the archive of the wide-field plate observations obtained at the University Observatory Jena, which is stored at the Astrophysical Institute of the Friedrich Schiller University Jena. The archive contains plates taken in the period Februar

Externí odkaz: http://arxiv.org/abs/1404.2401

Optical photometric and spectral study of the new FU Orionis object V2493 Cyg (HBC 722)

Autor: Semkov, E. H., Peneva, S. P., Munari, U., Tsvetkov, M. K., Jurdana-Sepic, R., de Miguel, E., Schwartz, R. D., Dimitrov, D. P., Kjurkchieva, D. P., Radeva, V. S.

We present new results from optical photometric and spectroscopic observations of the eruptive pre-main sequence star V2493 Cyg (HBC 722). The object has continued to undergo significant brightness variations over the past few months and is an ideal

Externí odkaz: http://arxiv.org/abs/1205.2532

Effect of Pyrrolidinedithiocarbamate Ligand on the Luminescence Properties of Heteroligand Samarium and Europium Complexes: Experimental and Theoretical Study.

Autor: Borrisov B; Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 11, Acad. G. Bonchev str., 1113 Sofia, Bulgaria., Tsvetkov M; Faculty of Chemistry and Pharmacy, Sofia University St. Kliment Ohridski, 1 James Bourchier blvd., 1164 Sofia, Bulgaria., Zahariev T; Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 11, Acad. G. Bonchev str., 1113 Sofia, Bulgaria., Elenkova D; Faculty of Chemistry and Pharmacy, Sofia University St. Kliment Ohridski, 1 James Bourchier blvd., 1164 Sofia, Bulgaria., Morgenstern B; Inorganic Solid State Chemistry, Saarland University, Campus Geb. C4 1, 66123 Saarbrücken, Germany., Dimov D; Institute of Optical Materials and Technologies, Bulgarian Academy of Sciences, 109, Acad. G. Bonchev str., 1113 Sofia, Bulgaria., Kukeva R; Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 11, Acad. G. Bonchev str., 1113 Sofia, Bulgaria., Trendafilova N; Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 11, Acad. G. Bonchev str., 1113 Sofia, Bulgaria., Georgieva I; Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 11, Acad. G. Bonchev str., 1113 Sofia, Bulgaria.

Publikováno v: Inorganic chemistry [Inorg Chem] 2024 Jul 29; Vol. 63 (30), pp. 13840-13864. Date of Electronic Publication: 2024 Jul 12.

Aperture Photometry of Saturated Star Images from Digitised Photographic Plates

Autor: Innis, J. L., Coates, D. W., Borisova, A. P., Tsvetkov, M. K.

Saturated stellar images on digitised photographic plates are many times greater in area than the `seeing disk' seen in unsaturated CCD images. Indeed the flux profile of a bright star can be traced out for several degrees from the star's centre. The

Externí odkaz: http://arxiv.org/abs/astro-ph/0502411