199 citations · 3.9k across the 129 of their papers we have counts for
124 papers
Detection of the distant quasar OP 313 with the first Large-Sized Telescope of CTAO
K. Abe, S. Abe, J. Abhir +412
In December 2023, the Large-Sized Telescope prototype (LST-1) detected for the first time VHE -ray emission from the FSRQ OP~313 becoming the furthest blazar ever observed at VH…
Detection of optical quasi-periodic oscillation in the blazar 3C 454.3
Karan Dogra, Alok C. Gupta, C. M. Raiteri +83
We analyzed 19 years of -band data of the blazar 3C 454.3 from the Whole Earth Blazar Telescope (WEBT) archive, along with new data from its members and from public archives suc…
VHE gamma-ray intranight variability from BL Lacertae during the extreme flaring state of 2022
K. Abe, S. Abe, A. Abhishek +297
BL Lacertae (BL Lac), the archetypal blazar of its subclass and one of the most studied blazars in the last decades, has undergone a series of major multi-wavelength outbursts sinc…
Optical spectral characterization of OP 313. Constraining the contribution of thermal and non-thermal optical emission
J. Otero-Santos, M. Nievas Rosillo, J. A. Acosta-Pulido +1
The quasar OP 313 was discovered in December 2023 in very-high-energy rays above 100 GeV, enabling for the first time a complete characterization of its emission. However, the…
QSOFEED: Investigating warm molecular, low- and high-ionization atomic gas in six type-2 quasars with GTC/EMIR
P. H. Cezar, M. Coloma Puga, C. Ramos Almeida +6
We present long-slit near-infrared spectroscopic observations of six nearby (z0.1) radio-quiet type-2 quasars (QSO2s) from the Quasar Feedback (QSOFEED) sample. They have bol…
Polarization echoes from past nuclear activity in the quasi-periodic eruption source GSN 069
B. Agís-González, D. Hutsemékers, I. Liodakis +8
Context. X-ray quasi-periodic eruptions (QPEs) are repeating, high-amplitude, soft X-ray bursts observed from the nuclei of a dozen nearby low-mass galaxies. Their origin remains a…