Constraining cosmological parameters from very-high-energy gamma-ray attenuation in blazar spectra: Bayesian inference and systematic uncertainties

arXiv:2607.23095 · astro-ph.HE, astro-ph.CO · Submitted 2026-07-25 · Read on arXiv

Patryk Liniewicz, Emmanuel Moulin

astro-ph.HE, astro-ph.CO

Submitted: 2026-07-25

Comments: Prepared for submission to JCAP

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• AGN — 20× in this paper · explained in 1 episode
• Extragalactic Background Light — 20× in this paper
• Bayesian Inference — 8× in this paper · explained in 5 episodes
• Hubble Tension — 5× in this paper · explained in 9 episodes
• Adam — 4× in this paper · explained in 2 episodes
• Cosmic Infrared Background — 4× in this paper
• Calibration — 3× in this paper · explained in 7 episodes
• Robustness — 2× in this paper · explained in 5 episodes
• Accuracy — 1× in this paper · explained in 1 episode
• Alignment — 1× in this paper · explained in 1 episode
• Anisotropy — 1× in this paper · explained in 3 episodes
• Bayesian Framework — 1× in this paper · explained in 3 episodes
• Cherenkov Telescope Array Observatory — 1× in this paper
• Consistency — 1× in this paper · explained in 3 episodes
• Cosmic Optical Background — 1× in this paper
• Hysteresis — 1× in this paper · explained in 3 episodes
• Trace — 1× in this paper · explained in 2 episodes

Sources

• Spectral analysis of Fermi-LAT blazars above 50 GeV
• Hunting extreme BL Lacertae blazars with Fermi-LAT
• Evidence for a new light spin-zero boson from cosmological gamma-ray propagation?
• The Cosmological Impact of Luminous TeV Blazars I: Implications of Plasma Instabilities for the Intergalactic Magnetic Field and Extragalactic Gamma-Ray Background
• Search for the imprint of axion-like particles in the highest-energy photons of hard $\gamma$-ray blazars
• An original constraint on the Hubble constant: h>0.74
• Measurement of the expansion rate of the Universe from \gamma-ray attenuation
• The extragalactic background light, the Hubble constant, and anomalies: conclusions from 20 years of TeV gamma-ray observations
• A new measurement of the Hubble constant and matter content of the Universe using extragalactic background light $\gamma$-ray attenuation
• Predictions of TeV emission for a set of hard BL Lac objects
• Novel bounds on decaying axionlike particle dark matter from the cosmic background
• A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team
• The Hubble Tension and Early Dark Energy
• The Cosmological Optical Convergence: Extragalactic Background Light from TeV Gamma Rays
• Extragalactic Background Light: Measurements and Applications
• Sensitivity to Axion-like Particle dark matter with very-high-energy gamma-ray observations of Active Galactic Nuclei located behind Galaxy Clusters
• Modeling the Extragalactic Background Light from Stars and Dust
• Semi-analytic modeling of the EBL and consequences for extragalactic gamma-ray spectra
• The extragalactic background light revisited and the cosmic photon-photon opacity
• A New Measurement of the Extragalactic Background Light using 15\,yr of {\it Fermi}-Large Area Telescope Data

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