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Line Evolution of the Nova V5587 Sgr from Early to Nebula Phase
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)The spectral evolution of the nova V5587 Sgr has been monitored at Koyama Astronomical Observatory and Higashi-Hiroshima Observatory, Japan, from the early to nebula phase. The nova rebrightened several times. The spectra ... -
Properties of Recurrent Nova T Pyxidis Based on 2011 Outburst
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)We reexamine the properties of the recurrent nova T Pyxidis based on our own spectroscopic data accompanying with the photometric ones by VSOLJ (Variable Star Observers League in Japan) during 2011 outburst. One of the ... -
Recurrent Novae — A Review
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)In recent years, recurrent nova eruptions are often observed very intensely in wide range of wavelengths from radio to optical to X-rays. Here I present selected highlights from recent multi-wavelength observations. The ... -
On the 2011 Outburst of the Recurrent Nova T Pyxidis
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)We discuss the nebular phase emission during the 2011 outburst of the recurrent nova T Pyxidis and present preliminaryresults on the analysis of the line profiles. We also present some discussions about the binary system ... -
The Recurrent Eclipsing Nova U Sco: A Short Review
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)U Scorpii is the recurrent nova with the shortest inter-outburst period, only ten years. The last active phase took place at the beginning of 2010, and it provided a large amount of data from both ground-based and space ... -
Optical Photometry of LMXBs: UW CrB (=MS 1603+260) and V1408 Aql (=4U 1957+115)
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)We present new optical observations of V1408 Aql (= 4U 1957+115), the only low mass X-ray binary, black hole candidate known to be in a persistently soft state. We combine new broadband optical photometry with previously ... -
Model Atmosphere Spectrum Fit to the Soft X-Ray Outburst Spectrum of SS Cyg
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)The X-ray spectrum of SS Cyg in outburst has a very soft component that can be interpreted as the fast-rotating optically thick boundary layer on the white dwarf surface. This component was carefully investigated by Mauche ... -
The Hidden Population of AM CVn Binaries in the Sloan Digital Sky Survey
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)We present results from a spectroscopic survey designed to uncover AM Canum Venaticorum (AM CVn) binaries hidden in the photometric database of the Sloan Digital Sky Survey (SDSS). The discovery of only 7 new AM CVns in ... -
The Role of Magnetic Field for Quiescence-Outburst Models in CVs
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)In this paper we present the elementary assumptions of our research on the role of the magnetic field in modelling the quiescence-outbursts cycle in Cataclysmic Variables (CVs). The behaviour of the magnetic field is crucial ... -
Close-In Substellar Companions and the Formation of sdB-Type Close Binary Stars
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)The sdB-type close binaries are believed to have experienced a common-envelope phase and may evolve into cataclysmic binaries (CVs). About 10% of all known sdB binaries are eclipsing binaries consisting of very hot subdwarf ... -
SWSex Stars, Old Novae, and the Evolution of Cataclysmic Variables
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)The population of cataclysmic variables with orbital periods right above the period gap are dominated by systems with extremely high mass transfer rates, the so-called SW Sextantis stars. On the other hand, some old novae ... -
Study of Photometric Variability of Selected SU UMa Dwarf Novae
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)In this work we present time-resolved photometry of several poorly-studied dwarf novae during recent superoutbursts. Observations were made with a CCD, mounted on 50- and 60-cm telescopes of the Sternberg Astronomical ... -
Application of Total Variation Minimization to Doppler Tomography
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)We have developed a new model of the Doppler tomography using total variation minimization (DTTVM). We demonstrated that this method can reconstruct localized and non-axisymmetric profiles possibly having sharp edges in ... -
New Insights from Inside-Out Doppler Tomography
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)We present preliminary results from our investigation into using an “inside-out” velocity space for creating a Doppler tomogram. The aim is to transpose the inverted appearance of the Cartesian velocity space used in normal ... -
Outburst Properties of V1504 Cyg and V344 Lyr
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)I begin by reviewing dwarf novae and the disk instability theory, and then present an overview of three ideas for producing superoutbursts in the SU UMa stars − the thermal tidal instability, irradiation-induced secondary ... -
What Powers the 2006 Outburst of the Symbiotic Star BF Cygni?
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)BF Cygni is a classical symbiotic binary. Its optical light curve occasionally shows outbursts of the Z And-type, whose nature is not well understood. During the 2006 August, BF Cyg underwent the recent outburst, and ... -
ON TRAVERSABILITY COST EVALUATION FROM PROPRIOCEPTIVE SENSING FOR A CRAWLING ROBOT
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)Traversability characteristics of the robot working environment are crucial in planning an efficient path for a robot operating in rough unstructured areas. In the literature, approaches to wheeled or tracked robots can ... -
ON FPGA BASED ACCELERATION OF IMAGE PROCESSING IN MOBILE ROBOTICS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)In visual navigation tasks, a lack of the computational resources is one of the main limitations of micro robotic platforms to be deployed in autonomous missions. It is because the most of nowadays techniques of visual ... -
IMPACT ASSESSMENT OF IMAGE FEATURE EXTRACTORS ON THE PERFORMANCE OF SLAM SYSTEMS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)This work evaluates an impact of image feature extractors on the performance of a visual SLAM method in terms of pose accuracy and computational requirements. In particular, the S-PTAM (Stereo Parallel Tracking and Mapping) ... -
X-COPTER STUDIO
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)We present a project that aggregates various existing robotic software and serves as a platform to conveniently control a quadrocopter, mainly for research or educational purposes. User interface runs in a browser and other ...