activity
20242026
most citedCoexistence of Chromatic Flares and an Achromatic QPO in the Gamma-ray Blazar PG 1553+113

5 citations · 11 across the 10 of their papers we have counts for

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10 papers · 1 filter

astro-ph.HE2026★ 1 cited

Spectral Hardening Revealed by Geometric De-boosting in the Masked Jet of PKS 2155304

Alberto Domínguez, Adithiya Dinesh, Elena Madero

Blazar gamma-ray variability is predominantly stochastic and well described by red-noise processes. However, a subset of sources shows quasi-periodic oscillations (QPOs) on year-lo…

astro-ph.HE2026

A New Measurement of the Extragalactic Background Light using 15\,yr of {\it Fermi}-Large Area Telescope Data

Anuvab Banerjee, Justin D. Finke, Marco Ajello +5

The extragalactic background Light (EBL) from ultraviolet to infrared comprises the emission from all stars, galaxies, and actively accreting black holes in the observable Universe…

astro-ph.HE2026★ 5 cited

Coexistence of Chromatic Flares and an Achromatic QPO in the Gamma-ray Blazar PG 1553+113

Elena Madero, Alberto Domínguez

The physical origin of quasi-periodic oscillations (QPOs) in blazars remains debated, with geometric and plasma-driven scenarios as the main competing interpretations. Discriminati…

astro-ph.HE2026

Geometric masking in AGN jets and its implications for unification and blazar physics

Alberto Domínguez

I explore the theoretical implications of the Geometric Masking scenario for AGN Unification and the blazar sequence. In PKS 2155304, GeV spectral hardening appears locked to it…

astro-ph.HE2026

A Catalogue of Variable Active Galactic Nuclei Based on Multi-Timescale Variability Analysis from Fermi-LAT Data

Luana Passos-Reis, Elisabete M. de Gouveia Dal Pino, Tarek Hassan +2

Active Galactic Nuclei (AGN) sources feature supermassive black holes that launch relativistic plasma jets. They are key -ray sources providing a unique laboratory for studying…

astro-ph.HE2025

Distortions in Periodicity Analysis of Blazars II: The Impact of Gaps

P. Peñil, N. Torres-Albà, A. Rico +4

Time series analysis is fundamental to characterizing the variability inherent in multi-wavelength emissions from blazars. However, a major observational challenge lies in the need…

astro-ph.HE2025

Extensive Analysis of gamma-Ray Periodicity in Jetted AGN from the 4FGL Catalog Using Fermi-LAT Observations

P. Peñil, A. Domínguez, S. Buson +3

The quest to uncover periodic patterns within the -ray emissions of jetted active galactic nuclei (AGN) has recently emerged as a focal point in astrophysics. One of the primary…

astro-ph.HE2025

TeV Emission in NGC 4278: Shock Energetics Insufficient, Compact Origin Favored

Alberto Domínguez

The Large High Altitude Air Shower Observatory recently detected TeV emission from the low-luminosity active galactic nucleus (LLAGN) NGC 4278. Integral-field spectroscopy with MEG…

astro-ph.HE2025★ 5 cited

Combined dark matter search towards dwarf spheroidal galaxies with Fermi-LAT, HAWC, H.E.S.S., MAGIC, and VERITAS

LAT Collaboration, S. Abdollahi, L. Baldini +586

Dwarf spheroidal galaxies (dSphs) are excellent targets for indirect dark matter (DM) searches using gamma-ray telescopes because they are thought to have high DM content and a low…

astro-ph.HE2024

Discovering High- BL Lacs Using Swift/UVOT and SARA Observations with the Dropout Technique

Y. Sheng, K. Imam, A. Kaur +14

Measuring spectroscopic redshifts for BL Lacertae (BL Lac) objects, a class of blazar, is challenging because their optical spectrum lacks, or has weak, emission lines ( equivalent…