Discovery of X-ray polarization angle rotation in the jet from blazar Mrk 421

L Di Gesu, HL Marshall, SR Ehlert, DE Kim… - Nature …, 2023 - nature.com
The magnetic-field conditions in astrophysical relativistic jets can be probed by
multiwavelength polarimetry, which has been recently extended to X-rays. For example, one …

The X-Ray Polarization View of Mrk 421 in an Average Flux State as Observed by the Imaging X-Ray Polarimetry Explorer

L Di Gesu, I Donnarumma, F Tavecchio… - The Astrophysical …, 2022 - iopscience.iop.org
Particle acceleration mechanisms in supermassive black hole jets, such as shock
acceleration, magnetic reconnection, and turbulence, are expected to have observable …

The spectral energy distribution of Fermi bright blazars

AA Abdo, M Ackermann, I Agudo, M Ajello… - The Astrophysical …, 2010 - iopscience.iop.org
The Large Area Telescope (LAT) on board the Fermi Gamma Ray Space Telescope,
launched on 2008 June 11, provides unprecedented sensitivity in the γ-ray band (20 MeV to …

Galactic and extragalactic sources of very high energy gamma rays

D Bose, VR Chitnis, P Majumdar, A Shukla - The European Physical …, 2022 - Springer
Abstract Very high energy\(\gamma\)-rays are one of the most important messengers of the
relativistic non-thermal Universe. The major motivation of very high energy\(\gamma\)-ray …

Fermi Large Area Telescope observations of Markarian 421: The missing piece of its spectral energy distribution

AA Abdo, M Ackermann, M Ajello… - The Astrophysical …, 2011 - iopscience.iop.org
FERMI LARGE AREA TELESCOPE OBSERVATIONS OF MARKARIAN 421: THE MISSING
PIECE OF ITS SPECTRAL ENERGY DISTRIBUTION - IOPscience Skip to content IOP …

An extremely luminous panchromatic outburst from the nucleus of a distant galaxy

AJ Levan, NR Tanvir, SB Cenko, DA Perley… - Science, 2011 - science.org
Variable x-ray and γ-ray emission is characteristic of the most extreme physical processes in
the universe. We present multiwavelength observations of a unique γ-ray–selected transient …

Long-term optical monitoring of TeV emitting blazars-I. Data analysis

K Nilsson, E Lindfors, LO Takalo, R Reinthal… - Astronomy & …, 2018 - aanda.org
We present ten years of R-band monitoring data of 31 northern blazars which were either
detected at very high-energy (VHE) gamma rays or listed as potential VHE gamma-ray …

Simultaneous Planck, Swift, and Fermi observations of X-ray and γ-ray selected blazars

P Giommi, G Polenta, A Lähteenmäki… - Astronomy & …, 2012 - aanda.org
We present simultaneous Planck, Swift, Fermi, and ground-based data for 105 blazars
belonging to three samples with flux limits in the soft X-ray, hard X-ray, and γ-ray bands, with …

Multiwavelength variability and correlation studies of Mrk 421 during historically low X-ray and γ-ray activity in 2015–2016

VA Acciari, S Ansoldi, LA Antonelli… - Monthly Notices of …, 2021 - academic.oup.com
We report a characterization of the multiband flux variability and correlations of the nearby
(z= 0.031) blazar Markarian 421 (Mrk 421) using data from Metsähovi, Swift, Fermi-LAT …

SIMULTANEOUS OBSERVATIONS OF PKS 2155− 304 WITH HESS, FERMI, RXTE, AND ATOM: SPECTRAL ENERGY DISTRIBUTIONS AND VARIABILITY IN A LOW …

F Aharonian, AG Akhperjanian, G Anton… - The Astrophysical …, 2009 - iopscience.iop.org
We report on the first simultaneous observations that cover the optical, X-ray, and high-
energy gamma-ray bands of the BL Lac object PKS 2155− 304. The gamma-ray bands were …