Search Publications

Collection of Minima of Eclipsing Binaries

Zasche, P.; Svoboda, P.; Uhlar, R. +2 more

We present CCD times of minima for selected eclipsing binaries. Besides our own data as obtained at various observatories, the photometric surveys (ASAS, SuperWASP, etc.) were also used.

Cepheids and RR Lyrae stars in the K2 fields

Plachy, E.; Molnar, L.; Szabo, R.

With the step-and-stare approach of the K2 mission, Kepler will be able to observe a large number of Cepheid an RR Lyrae stars. In this paper we summarize the target selection efforts, the scientific goals that can be achieved by Kepler, and the first impressions based on the K2 two-wheel engineering test data.

Reference frame and time standard used in INTEGRAL/OMC datasets

Domingo, Albert; Zejda, Miloslav

Short description of time coordinate used in INTEGRAL/OMC data is given. The variable-star community uses observations from the INTEGRAL/OMC satellite, but it seems that with incorrect interpretation of time given there.

101 Minima Times of Eclipsing Binaries Observed by INTEGRAL/OMC

Zasche, P.

The INTEGRAL/OMC CCD minima observations of eclipsing binaries are presented.

Three New Galactic Double-mode Pulsating Stars

Hajdu, G.; Jurcsik, J.; Sodor, A.

Double-mode nature of three pulsating variables are revealed.

HD 190336 a new beta Cep star

Hajdu, G.; Jurcsik, J.; Sodor, A.

HD 190336 (B0.7 II-III) is shown to be a multiperiodic beta Cep variable based on the publicly available HAT-5, Integral/OMC, and Hipparcos data.

236 Minima Timings of Eclipsing Binaries Observed by Integral OMC

Sobotka, P.

236 times of minima of 97 eclipsing binaries observed by ESA INTEGRAL OMC are presented.

Rapid Variations in RS Oph Observed by OMC/INTEGRAL

Hudec, R.; Hroch, F.; Simon, V.

XX Ophiuchi in Deep Minimum after 37 Years

Sobotka, P.

XX Ophiuchi is a unique object, which is very difficult to classify. This star only slowly varied around the maximum magnitude (V approx 9 mag) during the past 37 years. In March 2004, the brightness started to fade by 0.2 mag per month. I stress the urgent need of the spectroscopic observations during this minimum.