Profound optical flares from the relativistic jets of active galactic nuclei

Autor: Bhatta, Gopal, Zola, Staszek, Drozdz, M., Reichart, Daniel, Haislip, Joshua, Kouprianov, Vladimir, Matsumoto, Katsura, Sonbas, Eda, Caton, D., Pajdosz-Śmierciak, Urszula, Simon, A., Provencal, J., Góra, Dariusz, Stachowski, Grzegorz

Intense outbursts in blazars are among the most extreme phenomena seen in extragalactic objects. Studying these events can offer important information about the energetic physical processes taking place within the innermost regions of blazars, which

Externí odkaz: http://arxiv.org/abs/2308.07861

Kepler and TESS Observations of PG 1159-035

Autor: da Rosa, Gabriela Oliveira, Kepler, S. O., Córsico, Alejandro H., Costa, J. E. S., Hermes, J. J., Kawaler, S. D., Bell, Keaton J., Montgomery, M. H., Provencal, J. L., Winget, D. E., Handler, G., Dunlap, Bart, Clemens, J. C., Uzundag, Murat

PG 1159-035 is the prototype of the DOV hot pre-white dwarf pulsators. It was observed during the Kepler satellite K2 mission for 69 days in 59 s cadence mode and by the TESS satellite for 25 days in 20 s cadence mode. We present a detailed asterosei

Externí odkaz: http://arxiv.org/abs/2208.04791

GD358: three decades of observations for the in-depth asteroseismology of a DBV star

Autor: Bischoff-Kim, Agnes, Provencal, J. L., Bradley, P. A., Montgomery, M. H., Shipman, H. L., Harrold, Samuel T., Howard, B., Strickland, W., Chandler, D., Campbell, D., Arredondo, A., Linn, R., Russell, D. P., Doyle, D., Brickhouse, A., Peters, D., Kim, S. -L., Jiang, X. J., Mao, Y-N., Kusakin, A. V., Sergeev, A. V., Andreev, M., Velichko, S., Janulis, R., Pakstiene, E., Alicavus, F., Horoz, N., Zola, S., Ogloza, W., Koziel-Wierzbowska, D., Kundera, T., Jableka, D., Debski, B., Baran, A., Meingast, S., Nagel, T., Loebling, L., Heinitz, C., Hoyer, D., Bognar, Zs., Castanheira, B. G.

We report on the analysis of 34 years of photometric observations of the pulsating helium atmosphere white dwarf GD358. The complete data set includes archival data from 1982-2006, and 1195.2 hours of new observations from 2007- 2016. From this data

Externí odkaz: http://arxiv.org/abs/1810.11708

Stochastic modeling of multiwavelength variability of the classical BL Lac object OJ 287 on timescales ranging from decades to hours

Autor: Goyal, A., Stawarz, L., Zola, S., Marchenko, V., Soida, M., Nilsson, K., Ciprini, S., Baran, A., Ostrowski, M., Wiita, P. J., Gopal-Krishna, Siemiginowska, A., Sobolewska, M., Jorstad, S., Marscher, A., Hovatta, M. F. Aller H. D. Aller T., Caton, D. B., Reichart, D., Matsumoto, K., Sadakane, K., Gazeas, K., Kidger, M., Piirola, V., Jermak, H., Alicavus, F., Baliyan, K. S., Baransky, A., Berdyugin, A., Blay, P., Boumis, P., Boyd, D., Bufan, Y., Torrent, M. Campas, Campos, F., Gomez, J. Carrillo, Dalessio, J., Debski, B., Dimitrov, D., Drozdz, M., Er, H., Erdem, A., Perez, A. Escartin, Ramazani, V. Fallah, Filippenko, A. V., Gafton, E., Garcia, F., Godunova, V., Pinilla, F. Gomez, Gopinathan, M., Haislip, J. B., Haque, S., Harmanen, J., Hudec, R., Hurst, G., Ivarsen, K. M., Joshi, A., Kagitani, M., Karaman, N., Karjalainen, R., Kaur, N., l-Wierzbowska, D. Kozie, Kuligowska, E., Kundera, T., Kurowski, S., Kvammen, A., LaCluyze, A. P., Lee, B. C., Liakos, A., de Haro, J. Lozano, Mohammed, I., Moore, J. P., Mugrauer, M., Nogues, R. Naves, Neely, A. W., Ogloza, W., Okano, S., Pajdosz, U., Pandey, J. C., Perri, M., Poyner, G., Provencal, J., Pursimo, T., Raj, A., Rajkumar, B., Reinthal, R., Reynolds, T., Saario, J., Sadegi, S., Sakanoi, T., Gonzalez, J. L. Salto, Sameer, Heung, A., Simon, O., Siwak, M., Schweyer, T., Alfaro, F. C. Soldan, Sonbas, E., Strobl, J., Takalo, L. O., Espasa, L. Tremosa, Valdes, J. R., Vasylenko, V. V., Verrecchia, F., Webb, J. R., Yoneda, M., Zejmo, M., Zheng, W., Zielinski, P., Janik, J., Chavushyan, V., Cheung, C. C., Giroletti, M.

We present the results of our power spectral density analysis for the BL Lac object OJ\,287, utilizing the {\it Fermi}-LAT survey at high-energy $\gamma$-rays, {\it Swift}-XRT in X-rays, several ground-based telescopes and the {\it Kepler} satellite

Externí odkaz: http://arxiv.org/abs/1709.04457

Primary black hole spin in OJ287 as determined by the General Relativity centenary flare

Autor: Valtonen, M. J., Zola, S., Ciprini, S., Gopakumar, A., Matsumoto, K., Sadakane, K., Kidger, M., Gazeas, K., Nilsson, K., Berdyugin, A., Piirola, V., Jermak, H., Baliyan, K. S., Alicavus, F., Boyd, D., Torrent, M. Campas, Campos, F., Gomez, J. Carrillo, Caton, D. B., Chavushyan, V., Dalessio, J., Debski, B., Dimitrov, D., Drozdz, M., Er, H., Erdem, A., Perez, A. Escartin, Ramazani, V. Fallah, Filippenko, A. V., Ganesh, S., Garcia, F., Pinilla, F. Gomez, Gopinathan, M., Haislip, J. B., Hudec, R., Hurst, G., Ivarsen, K. M., Jelinek, M., Joshi, A., Kagitani, M., Kaur, N., Keel, W. C., LaCluyze, A. P., Lee, B. C., Lindfors, E., de Haro, J. Lozano, Moore, J. P., Mugrauer, M., Nogues, R. Naves, Neely, A. W., Nelson, R. H., Ogloza, W., Okano, S., Pandey, J. C., Perri, M., Pihajoki, P., Poyner, G., Provencal, J., Pursimo, T., Raj, A., Reichart, D. E., Reinthal, R., Sadegi, S., Sakanoi, T., Gonzalez, J. L. Salto, Schweyer, T., Siwak, M., Alfaro, F. C. Soldan, Sonbas, E., Steele, I., Stocke, J. T., Strobl, J., Takalo, L. O., Tomov, T., Espasa, L. Tremosa, Valdes, J. R., Perez, J. Valero, Verrecchia, F., Webb, J. R., Yoneda, M., Zejmo, M., Zheng, W., Telting, J., Saario, J., Reynolds, T., Kvammen, A., Gafton, E., Karjalainen, R., Harmanen, J., Blay, P.

Publikováno v: ApJ, 819, L37 (2016)

OJ287 is a quasi-periodic quasar with roughly 12 year optical cycles. It displays prominent outbursts which are predictable in a binary black hole model. The model predicted a major optical outburst in December 2015. We found that the outburst did oc

Externí odkaz: http://arxiv.org/abs/1603.04171