Zobrazeno 1 - 10
of 78
pro vyhledávání: '"Hudec, Renè"'
Autor:
Valtonen, Mauri J., Zola, Staszek, Gupta, Alok C., Kishore, Shubham, Gopakumar, Achamveedu, Jorstad, Svetlana G., Wiita, Paul J., Gu, Minfeng, Nilsson, Kari, Marscher, Alan P., Zhang, Zhongli, Hudec, Rene, Matsumoto, Katsura, Drozdz, Marek, Ogloza, Waldemar, Berdyugin, Andrei V., Reichart, Daniel E., Mugrauer, Markus, Dey, Lankeswar, Pursimo, Tapio, Lehto, Harry J., Ciprini, Stefano, Nakaoka, T., Uemura, M., Imazawa, Ryo, Zejmo, Michal, Kouprianov, Vladimir V., Davidson, Jr., James W., Sadun, Alberto, Strobl, Jan, Weaver, Z. R., Jelinek, Martin
We report the study of a huge optical intraday flare on November 12, 2021, at 2 am UT, in the blazar OJ287. In the binary black hole model it is associated with an impact of the secondary black hole on the accretion disk of the primary. Our multifreq
Externí odkaz:
http://arxiv.org/abs/2405.08627
Autor:
Valtonen, Mauri J., Zola, Staszek, Gopakumar, Achamveedu, Lähteenmäki, Anne, Tornikoski, Merja, Dey, Lankeswar, Gupta, Alok C., Pursimo, Tapio, Knudstrup, Emil, Gomez, Jose L., Hudec, Rene, Jelínek, Martin, Štrobl, Jan, Berdyugin, Andrei V., Ciprini, Stefano, Reichart, Daniel E., Kouprianov, Vladimir V., Matsumoto, Katsura, Drozdz, Marek, Mugrauer, Markus, Sadun, Alberto, Zejmo, Michal, Sillanpää, Aimo, Lehto, Harry J., Nilsson, Kari, Imazawa, Ryo, Uemura, Makoto, Davidson Jr, James W.
The highly variable blazar OJ~287 is commonly discussed as an example of a binary black hole system. The 130 year long optical light curve is well explained by a model where the central body is a massive black hole of 18.35$\times$10$^9$ solar mass t
Externí odkaz:
http://arxiv.org/abs/2308.03017
Autor:
Valtonen, Mauri J., Dey, Lankeswar, Gopakumar, Achamveedu, Zola, Staszek, Lähteenmäki, Anne, Tornikoski, Merja, Gupta, Alok C., Pursimo, Tapio, Knudstrup, Emil, Gomez, Jose L., Hudec, Rene, Jelínek, Martin, Štrobl, Jan, Berdyugin, Andrei V., Ciprini, Stefano, Reichart, Daniel E., Kouprianov, Vladimir V., Matsumoto, Katsura, Drozdz, Marek, Mugrauer, Markus, Sadun, Alberto, Zejmo, Michal, Sillanpää, Aimo, Lehto, Harry J., Nilsson, Kari, Imazawa, Ryo, Uemura, Makoto
We present a summary of the results of the OJ 287 observational campaign, which was carried out during the 2021/2022 observational season. This season is special in the binary model because the major axis of the precessing binary happens to lie almos
Externí odkaz:
http://arxiv.org/abs/2308.01878
Autor:
Valtonen, Mauri J., Zola, Staszek, Gopakumar, Lähteenmäki, Anne, Tornikoski, Merja, Dey, Lankeswar, Gupta, Alok C., Pursimo, Tapio, Knudstrup, Emil, Gomez, Jose L., Hudec, Rene, Jelínek, Martin, Štrobl, Jan, Berdyugin, Andrei V., Ciprini, Stefano, Reichart, Daniel E., Kouprianov, Vladimir V., Matsumoto, Katsura, Drozdz, Marek, Mugrauer, Markus, Sadun, Alberto, Zejmo, Michal, Sillanpää, Aimo, Lehto, Harry J., Nilsson, Kari, Imazawa, Ryo, Uemura, Makoto
The bright blazar OJ~287 routinely parades high brightness bremsstrahlung flares, which are explained as being a result of a secondary supermassive black hole (SMBH) impacting the accretion disc of a more massive primary SMBH in a binary system. The
Externí odkaz:
http://arxiv.org/abs/2303.15886
Autor:
Ror, Amit Kumar, Gupta, Rahul, Jelínek, Martin, Pandey, Shashi Bhushan, Castro-Tirado, A. J., Hu, Y. -D., Maleňáková, Alžběta, Štrobl, Jan, Thöne, Christina C., Hudec, René, Karpov, Sergey, Kumar, Amit, Aryan, A., Oates, S. R., Fernández-García, E., del Pulgar, C. Pérez, Caballero-García, M. D., Castellón, A., Carrasco-García, I. M., Pérez-García, I., Terol, A. J. Reina, Rendon, F.
We present a detailed prompt emission and early optical afterglow analysis of the two very high energy (VHE) detected bursts GRB 201015A and GRB 201216C, and their comparison with a subset of similar bursts. Time-resolved spectral analysis of multi-s
Externí odkaz:
http://arxiv.org/abs/2211.10036
Autor:
Valtonen, Mauri J., Zola, Staszek, Gopakumar, A., McCall, Callum, Jermak, Helen, Dey, Lankeswar, Komossa, S., Pursimo, Tapio, Knudstrup, Emil, Grupe, Dirk, Gomez, Jose L., Hudec, Rene, Jelinek, Martin, Strobl, Jan, Berdyugin, Andrei V., Ciprini, Stefano, Reichart, Daniel E., Kouprianov, Vladimir V., Matsumoto, Katsura, Drozdz, Marek, Mugrauer, Markus, Sadun, Alberto, Zejmo, Michal, Sillanpaa, Aimo, Lehto, Harry J., Nilsson, Kari
The bright blazar OJ~287 routinely parades high brightness bremsstrahlung flares which are explained as being a result of a secondary supermassive black hole (SMBH) impacting the accretion disk of a primary SMBH in a binary system. We begin by showin
Externí odkaz:
http://arxiv.org/abs/2209.08360
Autor:
Hudec, Rene, Feldman, Charly
This chapter describes the history, principles, and recent developments of large field of view X-ray optics based on lobster eye designs. Most of grazing incidence (reflective) X-ray imaging systems used in astronomy and other applications, are based
Externí odkaz:
http://arxiv.org/abs/2208.07149
Autor:
Jelínek, Martin, Topinka, Martin, Karpov, Sergey, Maleňáková, Alžběta, Hu, Y. -D., Rigoselli, Michela, Štrobl, Jan, Ebr, Jan, Cunniffe, Ronan, Thoene, Christina, Mašek, Martin, Janeček, Petr, Fernandez-García, Emilio, Hiriart, David, Lee, William H., Vítek, Stanislav, Hudec, René, Trávníček, Petr, Castro-Tirado, Alberto J., Prouza, Michael
Publikováno v:
A&A 662, A126 (2022)
Following the detection of a long GRB 190919B by INTEGRAL (INTErnational Gamma-Ray Astrophysics Laboratory), we obtained an optical photometric sequence of its optical counterpart. The light curve of the optical emission exhibits an unusually steep r
Externí odkaz:
http://arxiv.org/abs/2203.11059
Autor:
Valtonen, Mauri J., Dey, Lankeswar, Gopakumar, A., Zola, Staszek, Komossa, S., Pursimo, Tapio, Gomez, Jose L., Hudec, Rene, Jermak, Helen, Berdyugin, Andrei V.
Successful observations of the seven predicted bremsstrahlung flares from the unique bright blazar OJ 287 firmly point to the presence of a nanohertz gravitational wave (GW) emitting supermassive black hole (SMBH) binary central engine. We present ar
Externí odkaz:
http://arxiv.org/abs/2112.10102
Autor:
Oganesyan, Gor, Karpov, Sergey, Jelínek, Martin, Beskin, Gregory, Ronchini, Samuele, Banerjee, Biswajit, Branchesi, Marica, Štrobl, Jan, Polášek, Cyril, Hudec, René, Ivanov, Eugeny, Katkova, Elena, Perkov, Alexey, Biryukov, Anton, Lyapshina, Nadezhda, Sasyuk, Vyacheslav, Mašek, Martin, Janeček, Petr, Ebr, Jan, Juryšek, Jakub, Cunniffe, Ronan, Prouza, Michael
Publikováno v:
Nat Astron (2023)
Long $\rm \gamma$-ray bursts (GRBs) are produced by the dissipation of ultra-relativistic jets launched by newly-born black holes after the collapse of massive stars. Right after the luminous and highly variable $\gamma$-ray emission, the multi-wavel
Externí odkaz:
http://arxiv.org/abs/2109.00010