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102. B.R.N.O. Contributions #39 Times of minima

Author

Hoňková, K., Juryšek, J., Lehký, M., Šmelcer, L., Mašek, M., Mazanec, J., Hanžl, D., Urbaník, M., Magris, M., Vrašták, M., Walter, F., Hladík, B., Medulka, T., Bílek, F., Trnka, J., Jacobsen, J., Benáček, J., Kuchťák, B., Audejean, M., Ögmen, Y., Zíbar, M., Fatka, P., Marchi, F., Poddaný, S., Quinones, C., Tapia, L., Scaggiante, F., Zardin, D., Corfini, G., Hájek, P., Lomoz, F., Mravik, J., Grnja, J., Campos, F., Čaloud, J., Esseiva, N., Jakš, S., Horník, M., Filip, J., Uhlář, R., Mina, F., Artola, R., Zalazar, J., Müller, D., Pintr, P., and Divišová, L.

Subjects
Astrophysics - Solar and Stellar Astrophysics, FOS: Physical sciences, Solar and Stellar Astrophysics (astro-ph.SR)
Abstract

This paper presents 1463 times of minima for 455 objects acquired by 46 members and cooperating observers of the Variable Star and Exoplanet Section of the Czech Astronomical Society (B.R.N.O. Observing project). Observations were carried out between October 2013 - September 2014. Some neglected southern eclipsing binaries and newly discovered stars by the observers of project B.R.N.O. are included in the list., Comment: Published in OEJV, 66 pages, 1 figure

Published
2016
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104. B.R.N.O. Contributions #38 Times of minima

Author

Hoňková, K, Juryšek, J, Lehký, M, Šmelcer, L, Trnka, J, Colazo, C, Guzzo, P, Mina, Federico Daniel, Quinones, C, Taormina, M, Melia, R, Schneiter, Ernesto Matías, Scavuzzo, Alan Martin, Marcionni, M, Tapia, L, Fasseta, G, Suarez, N, Vilášek, M, Rozehnal, J., Kalisch, T, Lang, K., Gorková, S, Novysedlák, R, Salvaggio, F, Smyčka, T, Spurný, M, Wikander, T, Mravik, J, Šuchaň, J, and Čaloud, J.

Subjects
purl.org/becyt/ford/1 [https], Astronomía, Ciencias Físicas, PHOTOMETRY, MINIMA TIMINGS, purl.org/becyt/ford/1.3 [https], VARIABLE STARS, CIENCIAS NATURALES Y EXACTAS
Abstract

This paper presents observations of eclipsing binaries acquired by members and cooperating observers of the Variable Star and Exoplanet Section of Czech Astronomical Society (B.R.N.O. observing project). Paper contains 3417 times of minima for 969 objects. It was obtained by 80 observers during 2011 – 2013 period. Some neglected southern eclipsing binaries and newly discovered stars by the observers of project B.R.N.O. are included in the list. New accurate ephemerides have been found for 447 binary systems. Time of primary minimum of long period variable eps Aur is presented as well Fil: Hoňková, K. Variable Star and Exoplanet Section of Czech Astronomical Society; República Checa. Observatory and Planetarium of Johann Palisa; República Checa Fil: Juryšek, J. Variable Star and Exoplanet Section of Czech Astronomical Society; República Checa. Observatory and Planetarium of Johann Palisa; República Checa Fil: Lehký, M. Variable Star and Exoplanet Section of Czech Astronomical Society; República Checa. Astronomical Society at Hradec Kralove; República Checa Fil: Šmelcer, L. Variable Star and Exoplanet Section of Czech Astronomical Society; República Checa. Valašské Meziříčí Observatory; República Checa Fil: Trnka, J. Variable Star and Exoplanet Section of Czech Astronomical Society; República Checa. City Observatory Slaný; República Checa Fil: Colazo, C. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina. Estación Astrofísica Bosque Alegre; Argentina Fil: Guzzo, P. Estación Astrofísica Bosque Alegre; Argentina Fil: Mina, Federico Daniel. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina Fil: Quinones, C. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina Fil: Taormina, M. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina Fil: Melia, R. Observatorio Remoto Bosque Alegre; Argentina Fil: Schneiter, Ernesto Matías. Estación Astrofísica Bosque Alegre; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Scavuzzo, Alan Martin. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina Fil: Marcionni, M. Estación Astrofísica Bosque Alegre; Argentina Fil: Tapia, L. Estación Astrofísica Bosque Alegre; Argentina Fil: Fasseta, G. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina Fil: Suarez, N. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina Fil: Vilášek, M. Observatory and Planetarium of Johann Palisa; República Checa Fil: Rozehnal, J.. Štefánik Observatory; República Checa Fil: Kalisch, T. Variable Star and Exoplanet Section of Czech Astronomical Society; República Checa. Observatory and Planetarium of Johann Palisa; República Checa Fil: Lang, K.. Klokkerholm; Dinamarca Fil: Gorková, S. ALTAN.Observatory; República Checa Fil: Novysedlák, R. Námestie sv. Martina; Eslovaquia Fil: Salvaggio, F. Gruppo Astrofili Catanesi; Italia Fil: Smyčka, T. Variable Star and Exoplanet Section of Czech Astronomical Society; República Checa. City Observatory Slaný; República Checa Fil: Spurný, M. Nejdlova 16; República Checa Fil: Wikander, T. Ornäs Backyard; República Checa Fil: Mravik, J. Slobodana Jajića 16; República Checa Fil: Šuchaň, J. Kraskova 12; Eslovaquia Fil: Čaloud, J.. V Dolině 211; República Checa

Published
2013

107. Improved model of the triple system V746 Cassiopeiae that has a bipolar magnetic field associated with the tertiary.

Author

Harmanec, P., Brož, M., Mayer, P., Zasche, P., Kotková, L., Nemravová, J. A., Dukes, R. J., Korčáková, D., Šlechta, M., Kıran, E., Kříček, R., and Juryšek, J.

Subjects
COSMIC magnetic fields, BINARY stars, SPECTRUM analysis, ASTRONOMICAL photometry, ASTRONOMICAL observations, SUPERGIANT stars
Abstract

V746 Cas is known to be a triple system composed of a close binary with an alternatively reported period of either 25.^d4 or 27.^d8 and a distant third component in a 170 yr (62 000 d) orbit. The object was also reported to exhibit multiperiodic light variations with periods from 0.^d83 to 2.^d50, on the basis of which it was classified as a slowly pulsating B star. Interest in further investigation of this system was raised by the recent detection of a variable magnetic field. Analysing spectra from four instruments, earlier published radial velocities, and several sets of photometric observations, we arrived at the following conclusions: (1) The optical spectrum is dominated by the lines of the B-type primary (Teff 1 16 500(100) K), contributing 70% of the light in the optical region, and a slightly cooler B tertiary (Teff 3 13 620(150) K). The lines of the low-mass secondary are below our detection threshold; we estimate that it could be a normal A or F star. (2) We resolved the ambiguity in the value of the inner binary period and arrived at a linear ephemeris of Tsuper. conj.=HJD 2 443 838.78(81)+25.^d41569(42)× E. (3) The intensity of the magnetic field undergoes a sinusoidal variation in phase with one of the known photometric periods, namely 2.^d503867(19), which we identify with the rotational period of the tertiary. (4) The second dominant photometric 1.^d0649524(40) period is tentatively identified with the rotational period of the broad-lined B-type primary, but this interpretation is much less certain and needs further verification. (5) If our interpretation of photometric periods is confirmed, the classification of the object as a slowly pulsating B star should be revised. (6) Applying an N-body model to different types of available observational data, we can constrain the orbital inclination of the inner orbit to 60°

Published
2018
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110. TWO NEW BLAZHKO STARS: XZ UMi AND VX Scl.

Author

SKARKA, M., DOLINSKÝ, J., JURYŠEK, J., HOŇKOVÁ, K., MAŠEK, M., J., LIŠKA, and ZEJDA, M.

Subjects
RR Lyrae stars, STELLAR oscillations
Abstract

The article focuses on the light modulation phenomenon of stars called RR Lyrae stars showing the Blazhko effect in two stars namely the XZ UMi and the VX Scl, and discusses the variable pulsation period of the two stars.

Published
2016

111. HD 106426, A NEW MULTIPERIODIC δ SCUTI VARIABLE.

Author

HOŃKOVÁ, K., JURYŠEK, J., MAŠEK, M., PAUNZEN, E., and ZEJDA, M.

Subjects
*VARIABLE stars, *STAR observations, *ASTRONOMICAL observations, *ASTRONOMICAL spectroscopy, *STELLAR oscillations
Abstract

The article presents a study which observes the variability of HD 106426 scuti variable star. Methods and instruments used in the spectroscopic observation of HD 106426, a new multiperiodic δ Scuti variable at the Pierre Auger Observatory in the Mendoza province in Argentina are offered. Observation results showed a pulsation in the second or third overtone and that HD 106426 is multiperiodic.

Published
2015

115. Monte Carlo study of a single SST-1M prototype for the Cherenkov Telescope Array

Author

Juryšek, J., Alispach, C., Al Samarai, I., Balbo, M., Barbano, A., Beshley, V., Biland, A., Blazek, J., Blocki, J., Borkowski, J., Bulik, T., Cadoux, F., Chytka, L., Coco, V., Angelis, N., Della Volpe, D., Favre, Y., Gieras, T., Grudzinska, M., Hamal, P., Heller, M., Hrabovsky, M., Kasperek, J., Koncewicz, K., Kotarba, A., Lyard, E., Mach, E., Mandat, D., Michal, S., Michalowski, J., Moderski, R., Montaruli, T., Nagai, A., Neise, D., Niemiec, J., Njoh Ekoume, T. R. S., Ostrowski, M., Palatka, M., Pasko, P., Przybilski, H., Pech, M., Pilszyk, B., Rajda, P., Rozwadowski, P., Renier, Y., Petr Schovánek, Seweryn, K., Sliusar, V., Smakulska, D., Sobczynska, D., Stawarz, L., Swierblewski, J., Swierk, P., Travnicek, P., Troyano Pujadas, I., Walter, R., Wiecek, M., Zagdanski, A., and Zietara, K.

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract

The SST-1M telescope was developed as a prototype of a Small-Size-Telescope for the Cherenkov Telescope Array observatory and it has been extensively tested in Krakow since 2017. In this contribution we present validation of the Monte Carlo model of the prototype and expected performance in Krakow conditions. We focus on gamma/hadron separation and mono reconstruction of energy and gamma photon arrival direction using Machine learning methods., Comment: 8 pages, 13 figures, ICRC 2019 proceeding

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