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3 results on '"T. Krajci"'

1. Photometric Studies of 21 Eclipsing Binaries with Eccentric Orbits

Author

T. Krajci, V. S. Kozyreva, A. I. Bogomazov, and A. V. Kusakin

Subjects
Physics, Apsidal precession, Binary number, Motion (geometry), Astronomy and Astrophysics, Astrophysics, Light curve, Orbital period, 01 natural sciences, Maxima and minima, 03 medical and health sciences, Stars, 0302 clinical medicine, Target setting, 030225 pediatrics, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, 010303 astronomy & astrophysics, Instrumentation
Abstract

The paper describes a target setting of searching for apsidal motion in 21 eclipsing binaries. We estimate the capability of its determination for the systems of interest in the coming years, as well as present results of observations in 2009–2018, in which the minima of the light curves of these stars have been obtained. The accuracy of orbital period determination of the studied binaries is 10–100 times greater in comparison with the previously available data. For two systems, photometric elements are determined. As a by-product of the study, a close eclipsing binary of the W UMa type was discovered.

Published
2019

2. The Brightest Gamma-Ray Flaring Blazar in the Sky: AGILE and Multi-wavelength Observations of 3C 454.3 During 2010 November

Author

Sofia O. Kurtanidze, Valeri M. Larionov, M. F. Aller, Lorand A. Sigua, M. Trifoglio, V. Strelnitski, S. G. Sergeev, Fulvio Gianotti, J. L. Gomez, M. Cardillo, Pietro Ubertini, I. M. McHardy, Angela Bazzano, Fabrizio Lucarelli, Kirill Sokolovsky, C. M. Raiteri, A. Trois, T. Krajci, F. Lazzarotto, Mark Gurwell, I. Donnarumma, A. C. Sadun, Y. Evangelista, G. Walker, Manasvita Joshi, P. Santolamazza, M. Pasanen, D. A. Morozova, R. Reinthal, Elena Pian, M. G. Nikolashvili, M. Tavani, G. A. Borman, P. W. Cattaneo, A. Sillanpää, A. A. Arkharov, L. Maraschi, N. V. Efimova, Givi N. Kimeridze, E. Del Monte, F. Longo, G. Pucella, C. Pittori, K. Nilsson, A. Pellizzoni, E. Striani, V. Vittorini, Marc Türler, V. Bianchin, M. Rapisarda, A. Giuliani, Carlo Ferrigno, P. Soffitta, S. V. Nazarov, Hugh D. Aller, G. Barbiellini, R. A. Chigladze, E. Lindfors, Arnaud Ferrari, F. Verrecchia, S. Sabatini, M. Pilia, M. Villata, M. Giusti, F. Fuschino, Andrei Berdyugin, Uwe Bach, I. Agudo, L. O. Takalo, A. W. Chen, Brian W. Taylor, P. Giommi, Omar M. Kurtanidze, S. N. Molina, J. A. Ros, G. Piano, Stephanie Sallum, M. Feroci, Andrea Bulgarelli, T. Sakamoto, Yu. S. Efimov, P. Romano, S. Vercellone, L. Pacciani, Mariateresa Fiocchi, A. Rappoldi, R. D. Schwartz, S., Vercellone, E., Striani, V., Vittorini, I., Donnarumma, L., Pacciani, G., Pucella, M., Tavani, C. M., Raiteri, M., Villata, P., Romano, M., Fiocchi, A., Bazzano, V., Bianchin, C., Ferrigno, L., Maraschi, E., Pian, M., T\urler, P., Ubertini, A., Bulgarelli, A. W., Chen, A., Giuliani, Longo, Francesco, G., Barbiellini, M., Cardillo, P. W., Cattaneo, Monte, E., Y., Evangelista, M., Feroci, A., Ferrari, F., Fuschino, F., Gianotti, M., Giusti, F., Lazzarotto, A., Pellizzoni, G., Piano, M., Pilia, M., Rapisarda, A., Rappoldi, S., Sabatini, P., Soffitta, M., Trifoglio, A., Troi, P., Giommi, F., Lucarelli, C., Pittori, P., Santolamazza, F., Verrecchia, I., Agudo, H. D., Aller, M. F., Aller, A. A., Arkharov, U., Bach, A., Berdyugin, G. A., Borman, R., Chigladze, Y. S., Efimov, N. V., Efimova, J. L., Gomez, M. A., Gurwell, I. M., Mchardy, M., Joshi, G. N., Kimeridze, T., Krajci, O. M., Kurtanidze, S. O., Kurtanidze, V. M., Larionov, E., Lindfor, S. N., Molina, D. A., Morozova, S. V., Nazarov, M. G., Nikolashvili, K., Nilsson, M., Pasanen, R., Reinthal, J. A., Ro, A. C., Sadun, T., Sakamoto, S., Sallum, S. G., Sergeev, R. D., Schwartz, L. A., Sigua, A., Sillanp\a\a, K. V., Sokolovsky, V., Strelnitski, L., Takalo, B., Taylor, and G., Walker

Subjects
galaxies: active, galaxies: jets, radiation mechanisms: non-thermal, quasars: general, quasars: individual: 3C 454.3, Photon, media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, Flux, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Vela, 01 natural sciences, law.invention, Pulsar, law, 0103 physical sciences, Blazar, 010303 astronomy & astrophysics, media_common, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), general [quasars], 010308 nuclear & particles physics, individual: 3C 454.3 [quasars], Gamma ray, Astronomy and Astrophysics, non-thermal [radiation mechanisms], jet [galaxies], Space and Planetary Science, Sky, active [galaxies], Astrophysics - High Energy Astrophysical Phenomena, Flare
Abstract

Since 2005, the blazar 3C 454.3 has shown remarkable flaring activity at all frequencies, and during the last four years it has exhibited more than one gamma-ray flare per year, becoming the most active gamma-ray blazar in the sky. We present for the first time the multi-wavelength AGILE, SWIFT, INTEGRAL, and GASP-WEBT data collected in order to explain the extraordinary gamma-ray flare of 3C 454.3 which occurred in November 2010. On 2010 November 20 (MJD 55520), 3C 454.3 reached a peak flux (E>100 MeV) of F_gamma(p) = (6.8+-1.0)E-5 ph/cm2/s on a time scale of about 12 hours, more than a factor of 6 higher than the flux of the brightest steady gamma-ray source, the Vela pulsar, and more than a factor of 3 brighter than its previous super-flare on 2009 December 2-3. The multi-wavelength data make a thorough study of the present event possible: the comparison with the previous outbursts indicates a close similarity to the one that occurred in 2009. By comparing the broadband emission before, during, and after the gamma-ray flare, we find that the radio, optical and X-ray emission varies within a factor 2-3, whereas the gamma-ray flux by a factor of 10. This remarkable behavior is modeled by an external Compton component driven by a substantial local enhancement of soft seed photons., Accepted for publication in ApJ Letters. 18 Pages, 4 Figures, 1 Table

Published
2011

3. Polarization angle swings in blazars: The case of 3C 279(Corrigendum)

Author

Frank K. Schinzel, Vladimir A. Hagen-Thorn, L. V. Larionova, Valeri M. Larionov, S. V. Nazarov, Sebastian Kiehlmann, Dmitry A. Blinov, J. A. Zensus, Makoto Uemura, Givi N. Kimeridze, Sergey S. Savchenko, I. Korobtsev, Yuki Moritani, A. N. Burenkov, L. O. Takalo, Elena G. Larionova, Brian W. Taylor, Alan P. Marscher, V. E. Zhdanova, E. N. Kopatskaya, Michitoshi Yoshida, A. C. Sadun, S. G. Jorstad, S. N. Molina, I. M. McHardy, Lorand A. Sigua, Jochen Heidt, G. A. Borman, J. L. Gomez, Elina Lindfors, T. Krajci, Kirill Sokolovsky, Carolina Casadio, D. A. Morozova, M. G. Nikolashvili, N. G. Bochkarev, Kari Nilsson, R. Reinthal, O. M. Kurtanidze, Hiroshi Akitaya, O. I. Spiridonova, S. G. Sergeev, J. M. Lopez, N. V. Efimova, Manasvita Joshi, Mahito Sasada, N. G. Pulatova, Ivan Agudo, Erika Benítez, David Hiriart, Katsutoshi Takaki, Tuomas Savolainen, Yasushi Fukazawa, Andrei Berdyugin, Paul S. Smith, Ivan S. Troitsky, T. S. Grishina, V. T. Doroshenko, Sofia O. Kurtanidze, M. Sorcia, Koji S. Kawabata, T. Ui, L. S. Ugolkova, and Ryosuke Itoh

Subjects
Physics, Brewster's angle, 010504 meteorology & atmospheric sciences, Astronomy and Astrophysics, Astrophysics, Polarization (waves), 01 natural sciences, symbols.namesake, Space and Planetary Science, 0103 physical sciences, symbols, Blazar, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences
Published
2016

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