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Photometric and Spectral Data of Galactic Wolf-Rayet Stars (WC and WO sequence)
This catalogue contains results of photometric and spectral observations of seven Galactic Wolf–Rayet stars of the WC and WO sequences, obtained in 2021–2022 at the Fesenkov... -
Photometric and Spectral Data of Galactic Wolf-Rayet Stars (WN sequence)
This catalogue contains results of photometric and spectral observations of eleven Galactic Wolf–Rayet stars of the WN sequence, obtained in 2021–2022 at the Fesenkov... -
CCD Washington photometry of Antlia cluster
We present an extension of our previous research on the early-type galaxy population of the Antlia cluster (d~35Mpc), achieving a total coverage of ~2.6deg^2^ and performing... -
UBVRI photometry of Stock 18
We have carried out deep (V~21mag) UBVRI photometric study of the star cluster Stock 18. These along with archival Infrared data have been used to derive the basic cluster... -
UBVRIH{alpha} of {eta} Car in 2009
The periodic events occurring in {eta} Carinae have been widely monitored during the last three 5.5-year cycles. The last one recently occurred in January 2009 and more... -
BVIc photometry in Lynga 11
We have obtained CCD BVI_KC_ photometry down to V~21.5 for the open cluster Lynga 11 and its surrounding field. This previously unstudied object appears to be rich and highly... -
V392 Per. A gamma-ray bright nova
V392 Persei is a known dwarf nova (DN) that underwent a classical nova eruption in 2018. Here we report ground-based optical, Swift UV and X-ray, and Fermi-LAT {gamma}-ray... -
Field RR Lyrae stars
This paper presents an extensive overview of known and proposed RR Lyrae stars in binaries. The aim is to revise and extend the list with new Galactic field systems. We utilized... -
STEREO observations of variable stars
The feasibility of using data from the NASA STEREO mission for variable star and asteroseismology studies has been examined. A data analysis pipeline has been developed that is... -
Photometry of 3 open clusters
A comprehensive census of Galactic open cluster properties places unique constraints on the Galactic disc structure and evolution. In this framework, we investigate the... -
Photometry of stars at NAOR and ASV in 2013-2014
Using the 2m telescope of the Bulgarian National Astronomical Observatory at Rozhen, observations of 271 double or multiple stars were carried out during seven nights in 2013... -
BVR photometry of IZ Mon and AR Dra
We present multi-color photometric observations for two neglected near-contact binaries, IZ Mon (P=0.77980^d^) and AR Dra (P=0.67584^d^). By the aid of the updated W-D analysis... -
UBVIc CCD photometry of star clusters Tr14 and Tr16
We present new UBVIc CCD photometry of the young open clusters Trumpler 14 (Tr 14) and Trumpler 16 (Tr 16) in the {eta} Carina Nebula (NGC 3372). We also identify the optical... -
SZ Her BVRI light curves
Multiband CCD photometric observations of SZ Her were obtained between 2008 February and May. The light curve was completely covered and indicated a significant temperature... -
CCD photometry of V380 Cas
We present the first multicolor CCD photometry for the eclipsing binary V380 Cassiopeia (V380 Cas) observed on 34 nights in 2009 and 2010 at the University of Patras... -
BEST-II periodic variables in CoRoT LRa02 field. II.
The CoRoT (Convection, Rotation and planetary Transit) field LRa02 has been observed with the Berlin Exoplanet Search Telescope II (BEST II) during the southern summer... -
Light curves of AL Gem and BM Mon
We present the CCD photometry of two Algol-type binaries, AL Gem and BM Mon, observed from 2008 November to 2011 January. With the updated Wilson-Devinney program, photometric... -
VR light curves of CK Boo
We present precision CCD photometry, a period study, and a two-color simultaneous Wilson code solution of the short-period contact binary CK Bootis. The asymmetric light curves... -
2008-2009 WIYN speckle observations of binaries. VII.
Five hundred thirty-one speckle measures of binary stars are reported. These data were taken mainly during the period 2008 June through 2009 October at the WIYN 3.5m Telescope... -
BVRI observations of TZ Boo
New CCD photometric BVRI observations of the puzzling W UMa type binary star, TZ Bootis, are presented from our observations in 2010. By using the updated version of the...
