Results 81 to 90 of about 272 (130)

H1517+656: The Birth of a BL Lacertae Object?

The Astrophysical Journal, 2005
H1517+656 is an unusual source, even for a BL Lac object. It is one of the most luminous BL Lac objects known, with extreme emission properties at radio, optical, and X-ray frequencies. Furthermore, in our WFPC2 snapshot survey we discovered a series of peculiar arcs describing a 24 radius ring surrounding the source.
O'Dowd, M., Urry, M., Scarpa, R., Wayth, Randall, Webster, R.   +4 more
openaire   +2 more sources

Revisiting the Flaring Activity in Early 2015 of BL Lacertae Object S5 0716+714

The Astrophysical Journal
In this work, we analyzed multiwavelength data of the BL Lac object S5 0716+714 to investigate its emission mechanisms during a flaring state observed in early 2015.
Zhihao Ouyang, Hubing Xiao, Marina Manganaro, Shangchun Xie, Jingyu Wu, Jianzhen Chen, Rui Xue, Gege Wang, Shaohua Zhang, Junhui Fan   +9 more
doaj   +1 more source

HST Observations of the Host Galaxies of BL Lacertae Objects

, 1998
23 pages, including 6 postscript figures and 3 tables (embedded). Latex requires aaspp4.sty and psfig.sty (not included).
URRY C. M., FALOMO R., SCARPA R., PESCE J. E., TREVES, ALDO, GIAVALISCO M.   +5 more
openaire   +3 more sources

A study of BL Lacertae objects [PDF]

Monthly Notices of the Royal Astronomical Society, 1980
K. W. Weiler, K. J. Johnston
openaire   +1 more source

A 34.5 day quasi-periodic oscillation in γ-ray emission from the blazar PKS 2247-131. [PDF]

Nat Commun, 2018
Zhou J, Wang Z, Chen L, Wiita PJ, Vadakkumthani J, Morrell N, Zhang P, Zhang J.   +7 more
europepmc   +1 more source

Citation-based clustering of publications using CitNetExplorer and VOSviewer. [PDF]

Scientometrics, 2017
van Eck NJ, Waltman L.
europepmc   +1 more source

The Oscillation in Evolution of Changing-look Blazar OQ 334

The Astrophysical Journal
We investigate the evolution of a changing-look blazar (CLB) on long timescales and expect to trace the state change of a CLB. Three morphological types, including a flat spectrum radio quasar (FSRQ) state, transition state, and BL Lacertae (BL Lac ...
S. S. Ren, R. X. Zhou, Y. G. Zheng, S. J. Kang   +3 more
doaj   +1 more source

Systematic Search for Long-term Trends in Fermi-LAT Jetted Active Galactic Nuclei

The Astrophysical Journal
Jetted active galactic nuclei (AGN) exhibit variability across a wide range of timescales. Traditionally, this variability can often be modeled well as a stochastic process.
P. Peñil, A. Domínguez, S. Buson, M. Ajello, S. Adhikari, A. Rico   +5 more
doaj   +1 more source

Testing viable f(R) models with the angular-diameter distance to compact quasar cores. [PDF]

Phys Rev D, 2019
Sultana J, Melia F, Kazanas D.
europepmc   +1 more source

Superluminal sources. [PDF]

Proc Natl Acad Sci U S A, 1995
Vermeulen RC.
europepmc   +1 more source