Search Publications

Astrometry and photometry of digitized plates of Baldone Schmidt telescope

Eglitis, Ilgmars; Andruk, Vitaly

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 photom…

Spectral analysis of the He-enriched sdO-star HD 127493

Heber, Ulrich; Dorsch, Matti; Latour, Marilyn

The bright sdO star HD127493 is known to be of mixed H/He composition and excellent archival spectra covering both optical and ultraviolet ranges are available. UV spectra play a key role as they give access to many chemical species that do not show spectral lines in the optical, such as iron and nickel. This encouraged the quantitative spectral a…