29 citations · 81 across the 9 of their papers we have counts for
9 papers
Wide-Field Plate Archive of the University Observatory Jena
A. V. Poghosyan, W. Pfau, K. P. Tsvetkova +5
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 Un…
Singular Value Decomposition of Images from Scanned Photographic Plates
Vasil Kolev, Katya Tsvetkova, Milcho Tsvetkov
We want to approximate the mxn image A from scanned astronomical photographic plates (from the Sofia Sky Archive Data Center) by using far fewer entries than in the original matrix…
Optical photometric and spectral study of the new FU Orionis object V2493 Cyg (HBC 722)
E. H. Semkov, S. P. Peneva, U. Munari +7
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 signi…
Polyharmonic Daubechies type wavelets in Image Processing and Astronomy, II
Ognyan Kounchev, Damyan Kalaglarsky, Milcho Tsvetkov
We consider the application of the polyharmonic subdivision wavelets (of Daubechies type) to Image Processing, in particular to Astronomical Images. The results show an essential a…
Aperture Photometry of Saturated Star Images from Digitised Photographic Plates
J. L. Innis, D. W. Coates, A. P. Borisova +1
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…
The History of the Mysterious Eclipses of KH 15D II. Asiago, Kiso, Kitt Peak, Mt. Wilson, Palomar, Tautenburg and Rozhen Observatories, 1954-97
John Asher Johnson, Joshua N. Winn, Francesca Rampazzi +6
The unusual pre-main-sequence binary star named KH 15D undergoes remarkably deep and long-lasting periodic eclipses. Some clues about the reason for these eclipses have come from t…