Results 111 to 120 of about 1,170,090 (200)

CAZ catalog and optical light curves of 7918 blazar-selected active galactic nuclei

Astronomy & Astrophysics
Active galactic nuclei (AGN) are some of the brightest and most variable objects in the Universe. Those with relativistic jets observed at small viewing angles are blazars. Due to Doppler boosting, blazars exhibit extreme stochastic variability.
Kouch Pouya M., Lindfors Elina, Hovatta Talvikki, Liodakis Ioannis, Koljonen Karri I. I., Paggi Alessandro, Nilsson Kari, Jormanainen Jenni, Fallah Ramazani Vandad, Kankkunen Sofia, Wierda Folkert, Wagner Sarah M., Graham Matthew J.   +12 more
doaj   +1 more source

Optical variability modeling of newly identified blazar candidates behind Magellanic Clouds

, 2019
We present results of a variability study in the optical band of 44 newly identified blazar candidates behind the Magellanic Clouds. Our sample contains 27 flat spectrum radio quasars (FSRQs) and 17 BL Lacertae objects (BL Lacs).
Stawarz, Łukasz, Tarnopolski, Mariusz, Böttcher, Markus, Żywucka-Hejzner, Natalia, Marchenko, Volodymyr, Zywucka, Natalia, Stawarz, Lukasz   +6 more
core   +1 more source

Multiband Optical Variability of the Blazar OP 313 in the Outburst State during 2024–2025

The Astrophysical Journal
We present the analysis results of flux and spectral variability of the blazar OP 313 across intra-night to short-term timescales using BVRI photometric data, gathered over 25 nights from 2024 November to 2025 May, using two optical telescopes in ...
P. U. Devanand, Alok C. Gupta, Karan Dogra, Shubham Kishore, Tushar Tripathi   +4 more
doaj   +1 more source

Temporal variability of polarization in blazars

Astronomy & Astrophysics
We investigated the temporal variability of the polarization of synchrotron radiation from blazar jets. Multiwavelength observations reveal high-amplitude rotations of the electric vector position angle (EVPA), both in the optical and in the X-rays. The polarization degree and the EVPA often show seemingly erratic variability.
F. Bolis, E. Sobacchi, F. Tavecchio
openaire   +2 more sources

Revisiting Radio Variability of the Blazar 3C 454.3

The Astrophysical Journal
We examine lengthy radio light curves of the flat spectrum radio galaxy 3C 454.3 for possible quasiperiodic oscillations (QPOs). The data used in this work were collected at five radio frequencies, 4.8, 8.0, 14.5, 22.0, and 37.0 GHz between 1979 and 2013
Ashutosh Tripathi, Alok C. Gupta, Krista Lynne Smith, Paul J. Wiita, Margo F. Aller, Alexandr E. Volvach, Anne Lähteenmäki, Hugh D. Aller, Merja Tornikoski, Larisa N. Volvach   +9 more
doaj   +1 more source

Assigning Degrees of Stochasticity to Blazar Light Curves in the Radio Band Using Complex Networks. [PDF]

Entropy (Basel), 2022
Acosta-Tripailao B, Max-Moerbeck W, Pastén D, Moya PS.   +3 more
europepmc   +1 more source

Patterns of X-Ray and γ-Ray Flares: From Blazar to Magnetar and Sun

The Astrophysical Journal
Using Gaussian process methods, we analyzed the light curves of three extreme solar X-ray flares observed by the RHESSI satellite. Their variability characteristics were then compared with those of HXMT-HE X-ray burst (XRB; in SGR 1935+2154) associated ...
Haiyun Zhang, Dahai Yan, Lijuan Dong, Ping Zhang, Ruijing Tang, Jianeng Zhou, Lian Tao, Li Zhang, Niansheng Tang   +8 more
doaj   +1 more source

Chronic GvHD NIH Consensus Project Biology Task Force: evolving path to personalized treatment of chronic GvHD. [PDF]

Blood Adv, 2023
Buxbaum NP, Socié G, Hill GR, MacDonald KPA, Tkachev V, Teshima T, Lee SJ, Ritz J, Sarantopoulos S, Luznik L, Zeng D, Paczesny S, Martin PJ, Pavletic SZ, Schultz KR, Blazar BR.   +15 more
europepmc   +1 more source

IL-21-producing effector Tfh cells promote B cell alloimmunity in lymph nodes and kidney allografts. [PDF]

JCI Insight, 2023
Zhang H, Cavazzoni CB, Podestà MA, Bechu ED, Ralli G, Chandrakar P, Lee JM, Sayin I, Tullius SG, Abdi R, Chong AS, Blazar BR, Sage PT.   +12 more
europepmc   +1 more source

Association of the IceCube neutrinos with CAZ blazar light curves

Astronomy & Astrophysics
The IceCube Neutrino Observatory has detected several hundred high-energy neutrinos from cosmic sources. Despite numerous studies searching for their origin, it is still not known which sources emit them.
Kouch Pouya M., Hovatta Talvikki, Lindfors Elina, Liodakis Ioannis, Koljonen Karri I. I., Paggi Alessandro   +5 more
doaj   +1 more source