5 results on '"Sergienko, Y. P."'
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2. The optical identification of events with poorly defined locations: The case of the Fermi GBM GRB 140801A
- Author
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Lipunov, V. M., Gorosabel, J., Pruzhinskaya, M. V., De, Ugarte, Postigo, A., Pelassa, V., Tsvetkova, A. E., Sokolov, I. V., Kann, D. A., Xu, D., Gorbovskoy, E. S., Krushinski, V. V., Kornilov, V. G., Balanutsa, P. V., Boronina, S. V., Budnev, N. M., Cano, Z., Castro-Tirado, A. J., Chazov, V. V., Connaughton, V., Delvaux, C., Frederiks, D. D., Fynbo, J. F. , U., Gabovich, A. V., Goldstein, A., Greiner, J., Gress, O. A., Ivanov, K. I., Jakobsson, P., Klose, S., Knust, F., Komarova, V. N., Konstantinov, E., Krylov, A. V., Kuvshinov, D. A., Kuznetsov, A. S., Lipunova, G. V., Moskvitin, A. S., Pal'shin, V. D., Pandey, S. B., Poleshchuk, V. A., Schmidl, S., Sergienko, Y. P., Sinyakov, E. V., Schulze, S., Sokolov, V. V., Sokolova, T. N., Sparre, M., Thöne, C. C., Tlatov, A. G., Tyurina, N. V., Ulanov, M. V., Yazev, S. A., Yurkov, V. V., Lipunov, V. M., Gorosabel, J., Pruzhinskaya, M. V., De, Ugarte, Postigo, A., Pelassa, V., Tsvetkova, A. E., Sokolov, I. V., Kann, D. A., Xu, D., Gorbovskoy, E. S., Krushinski, V. V., Kornilov, V. G., Balanutsa, P. V., Boronina, S. V., Budnev, N. M., Cano, Z., Castro-Tirado, A. J., Chazov, V. V., Connaughton, V., Delvaux, C., Frederiks, D. D., Fynbo, J. F. , U., Gabovich, A. V., Goldstein, A., Greiner, J., Gress, O. A., Ivanov, K. I., Jakobsson, P., Klose, S., Knust, F., Komarova, V. N., Konstantinov, E., Krylov, A. V., Kuvshinov, D. A., Kuznetsov, A. S., Lipunova, G. V., Moskvitin, A. S., Pal'shin, V. D., Pandey, S. B., Poleshchuk, V. A., Schmidl, S., Sergienko, Y. P., Sinyakov, E. V., Schulze, S., Sokolov, V. V., Sokolova, T. N., Sparre, M., Thöne, C. C., Tlatov, A. G., Tyurina, N. V., Ulanov, M. V., Yazev, S. A., and Yurkov, V. V.
- Abstract
We report the early discovery of the optical afterglow of gamma-ray burst (GRB) 140801A in the 137 deg2 3-σ error-box of the Fermi Gamma-ray Burst Monitor (GBM). MASTER is the only observatory that automatically reacts to all Fermi alerts. GRB 140801A is one of the few GRBs whose optical counterpart was discovered solely from its GBM localization. The optical afterglow of GRB 140801A was found by MASTER Global Robotic Net 53 s after receiving the alert, making it the fastest optical detection of a GRB from a GBM error-box. Spectroscopy obtained with the 10.4-m Gran Telescopio Canarias and the 6-m Big Telescope Alt-azimuth of the Special Astrophysical Observatory of the Russian Academy of Sciences reveals a redshift of z = 1.32. We performed optical and near-infrared photometry of GRB 140801A using different telescopes with apertures ranging from 0.4 to 10.4 m. GRB 140801A is a typical burst in many ways. The rest-frame bolometric isotropic energy release and peak energy of the burst are Eiso = 5.54+0.26 -0.24 × 1052 erg and Ep, rest ≃280 keV, respectively, which is consistent with the Amati relation. The absence of a jet break in the optical light curve provides a lower limit on the half-opening angle of the jet θ = 6.° 1. The observed Epeak is consistent with the limit derived from the Ghirlanda relation. The joint Fermi GBM and Konus-Wind analysis show that GRB 140801A could belong to the class of intermediate duration. The rapid detection of the optical counterpart of GRB 140801A is especially important regarding the upcoming experiments with large coordinate error-box areas. © 2015 The Authors.
- Published
- 2016
3. The MASTER-II network of robotic optical telescopes. First results
- Author
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Gorbovskoy, E. S., Lipunov, V. M., Kornilov, V. G., Belinski, A. A., Kuvshinov, D. A., Tyurina, N. V., Sankovich, A. V., Krylov, A. V., Shatskiy, N. I., Balanutsa, P. V., Chazov, V. V., Kuznetsov, A. S., Zimnukhov, A. S., Shumkov, V. P., Shurpakov, S. E., Senik, V. A., Gareeva, D. V., Pruzhinskaya, M. V., Tlatov, A. G., Parkhomenko, A. V., Dormidontov, D. V., Krushinsky, V. V., Punanova, A. F., Zalozhnyh, I. S., Popov, A. A., Burdanov, A. Y., Yazev, S. A., Budnev, N. M., Ivanov, K. I., Konstantinov, E. N., Gress, O. A., Chuvalaev, O. V., Yurkov, V. V., Sergienko, Y. P., Kudelina, I. V., Sinyakov, E. V., Karachentsev, I. D., Moiseev, A. V., Fatkhullin, T. A., Gorbovskoy, E. S., Lipunov, V. M., Kornilov, V. G., Belinski, A. A., Kuvshinov, D. A., Tyurina, N. V., Sankovich, A. V., Krylov, A. V., Shatskiy, N. I., Balanutsa, P. V., Chazov, V. V., Kuznetsov, A. S., Zimnukhov, A. S., Shumkov, V. P., Shurpakov, S. E., Senik, V. A., Gareeva, D. V., Pruzhinskaya, M. V., Tlatov, A. G., Parkhomenko, A. V., Dormidontov, D. V., Krushinsky, V. V., Punanova, A. F., Zalozhnyh, I. S., Popov, A. A., Burdanov, A. Y., Yazev, S. A., Budnev, N. M., Ivanov, K. I., Konstantinov, E. N., Gress, O. A., Chuvalaev, O. V., Yurkov, V. V., Sergienko, Y. P., Kudelina, I. V., Sinyakov, E. V., Karachentsev, I. D., Moiseev, A. V., and Fatkhullin, T. A.
- Abstract
The main stages in the creation of the Russian segment of the MASTER network of robotic telescopes is described. This network is designed for studies of the prompt optical emission of gammaray bursts (GRBs; optical emission synchronous with the gamma-ray radiation) and surveys of the sky aimed at discovering uncataloged objects and photometric studies for various programs. The first results obtained by the network, during its construction and immediately after its completion in December 2010, are presented. Eighty-nine alert pointings at GRBs (in most cases, being the first ground telescopes to point at the GRBs) were made from September 2006 through July 2011. The MASTER network holds first place in the world in terms of the total number of first pointings, and currently more than half of first pointings at GRBs by ground telescopes are made by the MASTER network. Photometric light curves of GRB 091020, GRB 091127, GRB 100901A, GRB 100906A, GRB 10925A, GRB 110106A, GRB 110422A, and GRB 110530A are presented. It is especially important that prompt emission was observed for GRB 100901A and GRB 100906A, and thar GRB 091127, GRB 110422A, and GRB 110106A were observed from the first seconds in two polarizations. Very-wide-field cameras carried out synchronous observations of the prompt emission of GRB 081102, GRB 081130B, GRB 090305B, GRB 090320B, GRB 090328, and GRB 090424. Discoveries of Type Ia supernovae are ongoing (among them the brightest supernova in 2009): 2008gy, 2009nr, 2010V, and others. In all, photometry of 387 supernovae has been carried out, 43 of which were either discovered or first observed with MASTER telescopes; more than half of these are Type Ia supernovae. Photometric studies of the open clusters NGC 7129 and NGC 7142 have been conducted, leading to the discovery of 38 variable stars. Sixty-nine optical transients have been discovered. © 2013 Pleiades Publishing, Ltd.
- Published
- 2013
4. Photometric Observations of the Supernova 2009nr
- Author
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Tsvetkov, D. Y., Balanutsa, P. V., Lipunov, V. M., Volkov, I. M., Tuchin, O. A., Kudelina, I. P., Pruzhinskaya, M. V., Gorbovskoy, E. S., Kornilov, V. G., Belinskii, A. A., Tyurina, N. V., Yurkov, V. V., Sergienko, Y. P., Tlatov, A. G., Parkhomenko, A. V., Dormidontov, D. V., Senik, V. A., Krushinskii, V. V., Tsvetkov, D. Y., Balanutsa, P. V., Lipunov, V. M., Volkov, I. M., Tuchin, O. A., Kudelina, I. P., Pruzhinskaya, M. V., Gorbovskoy, E. S., Kornilov, V. G., Belinskii, A. A., Tyurina, N. V., Yurkov, V. V., Sergienko, Y. P., Tlatov, A. G., Parkhomenko, A. V., Dormidontov, D. V., Senik, V. A., and Krushinskii, V. V.
- Abstract
We present the results of our UBVRI CCD photometry for the second brightest supernova of 2009, SN 2009nr, discovered during a sky survey with the telescopes of the MASTER robotic network. Its light and color curves and bolometric light curves have been constructed. The light-curve parameters and the maximum luminosity have been determined. SN 2009nr is shown to be similar in light-curve shape and maximum luminosity to SN 1991T, which is the prototype of the class of supernovae Ia with an enhanced luminosity. SN 2009nr exploded far from the center of the spiral galaxy UGC 8255 and most likely belongs to its old halo population. We hypothesize that this explosion is a consequence of the merger of white dwarfs. © 2011 Pleiades Publishing, Ltd.
- Published
- 2011
5. Temperature Dependence of Integrated Intensities of Vibrational Bands in M2GeF6 IR-Absorption Spectra
- Author
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Sergienko, Y. I., Ignatieva, L. N., Gordienko, P. S., Eiberman, M. F., and Bogdan, S. F.
- Abstract
The paper presents experimental results of studies on the temperature dependence of integrated intensities of vibrational bands corresponding to 3(GeF 6) in M2GeF6 IR-spectra. It is shown that unlike Na2GeF6, Rb2GaF6, and Cs2GeF6, where the dependence of intensity on temperature is monotonous, in the case of K2GeF6 there exist anomalous temperature ranges of 220-240 and 150-170 K, where the intensity of a band, corresponding to 3(GeF2-6) changes abruptly. The study of heat evaluation, heat capacity, unit cell parameters, and intensities of selective reflexes in K2GeF6 X-ray diffraction patterns indicates the presence in this compound, as distinguished from others in the seris considerod, of phase transitions of the first order. On the basis of IB, 19F NNR, X-rat and calorimetric data, a possible mechanism of polymorphic transformation is discussed.
- Published
- 1978
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