output
19912026
Showing 2024 · astro-ph.HEShow all

21 papers · 2 filters

astro-ph.HE2024★ 1 cited

Time-dependent modelling of short-term variability in the TeV-blazar VER J0521+211 during the major flare in 2020

MAGIC Collaboration, S. Abe, J. Abhir +228

The BL Lacertae object VER J0521+211 underwent a notable flaring episode in February 2020. A short-term monitoring campaign, led by the MAGIC (Major Atmospheric Gamma Imaging Chere…

astro-ph.HE2024★ 5 cited

Evolution, speed, and precession of the parsec-scale jet in the 3C 84 radio galaxy

M. Foschi, J. L. Gómez, A. Fuentes +3

We present high resolution images of the radio source 3C 84 at 43 GHz, from 121 observations conducted by the BEAM-ME monitoring program between 2010 and 2023. Imaging was performe…

astro-ph.HE2024★ 4 cited

Multi-wavelength study of OT 081: broadband modelling of a transitional blazar

MAGIC Collaboration, H. Abe, S. Abe +270

OT 081 is a well-known, luminous blazar that is remarkably variable in many energy bands. We present the first broadband study of the source which includes very-high-energy (VHE, $…

astro-ph.HE2024★ 10 cited

IXPE Observation of the Low-Synchrotron Peaked Blazar S4 0954+65 During An Optical-X-ray Flare

Pouya M. Kouch, Ioannis Liodakis, Francesco Fenu +134

The X-ray polarization observations made possible with the Imaging X-ray Polarimetry Explorer (IXPE) offer new ways of probing high-energy emission processes in astrophysical jets…

astro-ph.HE2024★ 15 cited

A wiggling filamentary jet at the origin of the blazar multi-wavelength behaviour

C. M. Raiteri, M. Villata, M. I. Carnerero +96

Blazars are beamed active galactic nuclei known for their strong multi-wavelength variability on timescales from years down to minutes. We aim to investigate the suitability of the…

astro-ph.HE2024★ 7 cited

Insights from the first flaring activity of a high-synchrotron-peaked blazar with X-ray polarization and VHE gamma rays

MAGIC Collaboration, K. Abe, S. Abe +250

We study a flaring activity of the HSP Mrk421 that was characterized from radio to very-high-energy (VHE; E TeV) gamma rays with MAGIC, Fermi-LAT, Swift, XMM-Newton and sever…

astro-ph.HE2024★ 5 cited

Testing particle acceleration in blazar jets with continuous high-cadence optical polarization observations

Ioannis Liodakis, Sebastian Kiehlmann, Alan P. Marscher +44

Variability can be the pathway to understanding the physical processes in astrophysical jets, however, the high-cadence observations required to test particle acceleration models a…

astro-ph.HE2024★ 15 cited

Probing the polarized emission from SMC X-1: the brightest X-ray pulsar observed by IXPE

Sofia V. Forsblom, Sergey S. Tsygankov, Juri Poutanen +101

Recent observations of X-ray pulsars (XRPs) performed by the Imaging X-ray Polarimetry Explorer (IXPE) have made it possible to investigate the intricate details of these objects i…

astro-ph.HE2024★ 14 cited

Discovery of a shock-compressed magnetic field in the north-western rim of the young supernova remnant RX J1713.7-3946 with X-ray polarimetry

Riccardo Ferrazzoli, Dmitry Prokhorov, Niccolò Bucciantini +99

Supernova remnants (SNRs) provide insights into cosmic-ray acceleration and magnetic field dynamics at shock fronts. Recent X-ray polarimetric measurements by the Imaging X-ray Pol…

astro-ph.HE2024★ 35 cited

IXPE observation of PKS 2155-304 reveals the most highly polarized blazar

Pouya M. Kouch, Ioannis Liodakis, Riccardo Middei +133

We report the X-ray polarization properties of the high-synchrotron-peaked (HSP) blazar PKS 2155304 based on observations with the Imaging X-ray Polarimetry Explorer (IXPE). We…

astro-ph.HE2024★ 4 cited

The flaring activity of blazar AO 0235+164 during year 2021

Juan Escudero Pedrosa, Iván Agudo, Till Moritz +16

Context. The blazar AO 0235+164, located at redshift , has displayed interesting and repeating flaring activity in the past, the latest episodes occurring in 2008 and 2015.…

astro-ph.HE2024★ 2 cited

Candidate strongly lensed type Ia supernovae in the Zwicky Transient Facility archive

A. Townsend, J. Nordin, A. Sagués Carracedo +61

Gravitationally lensed type Ia supernovae (glSNe Ia) are unique astronomical tools that can be used to study cosmological parameters, distributions of dark matter, the astrophysics…

astro-ph.HE2024★ 16 cited

Studying geometry of the ultraluminous X-ray pulsar Swift J0243.6+6124 using X-ray and optical polarimetry

Juri Poutanen, Sergey S. Tsygankov, Victor Doroshenko +108

Discovery of pulsations from a number of ULXs proved that accretion onto neutron stars can produce luminosities exceeding the Eddington limit by several orders of magnitude. The co…

astro-ph.HE2024★ 34 cited

Broadband Multi-wavelength Properties of M87 during the 2018 EHT Campaign including a Very High Energy Flaring Episode

J. C. Algaba, M. Balokovic, S. Chandra +738

The nearby elliptical galaxy M87 contains one of the only two supermassive black holes whose emission surrounding the event horizon has been imaged by the Event Horizon Telescope (…

astro-ph.HE2024★ 9 cited

The variability patterns of the TeV blazar PG 1553+113 from a decade of MAGIC and multi-band observations

MAGIC Collaboration, H. Abe, S. Abe +264

PG 1553+113 is one of the few blazars with a convincing quasi-periodic emission in the gamma-ray band. The source is also a very high-energy (VHE; >100 GeV) gamma-ray emitter. To b…

astro-ph.HE2024★ 18 cited

X-ray polarization measurement of the gold standard of radio-quiet active galactic nuclei : NGC 1068

F. Marin, A. Marinucci, M. Laurenti +102

We used the Imaging X-ray Polarimetry Explorer (IXPE) satellite to measure, for the first time, the 2-8 keV polarization of NGC 1068. We pointed IXPE for a net exposure time of 1.1…

astro-ph.HE2024★ 10 cited

The rate of extreme coronal line emitting galaxies in the Sloan Digital Sky Survey and their relation to tidal disruption events

Joseph Callow, Or Graur, Peter Clark +27

High-ionization iron coronal lines (CLs) are a rare phenomenon observed in galaxy and quasi-stellar object spectra that are thought to be created by high-energy emission from activ…

astro-ph.HE2024★ 26 cited

Ordered magnetic fields around the 3C 84 central black hole

G. F. Paraschos, J. -Y. Kim, M. Wielgus +279

3C84 is a nearby radio source with a complex total intensity structure, showing linear polarisation and spectral patterns. A detailed investigation of the central engine region nec…

astro-ph.HE2024★ 33 cited

Detection of X-ray Polarization from the Blazar 1ES 1959+650 with the Imaging X-ray Polarimetry Explorer

Manel Errando, Ioannis Liodakis, Alan P. Marscher +142

Observations of linear polarization in the 2-8 keV energy range with the Imaging X-ray Polarimetry Explorer (IXPE) explore the magnetic field geometry and dynamics of the regions g…

astro-ph.HE2024★ 22 cited

Discovery of a strong rotation of the X-ray polarization angle in the galactic burster GX 13+1

Anna Bobrikova, Sofia V. Forsblom, Alessandro Di Marco +106

Weakly magnetized neutron stars in X-ray binaries show complex phenomenology with several spectral components that can be associated with the accretion disk, boundary and/or spread…

astro-ph.HE2024★ 19 cited

Insights into the broad-band emission of the TeV blazar Mrk 501 during the first X-ray polarization measurements

S. Abe, J. Abhir, V. A. Acciari +260

We present the first multi-wavelength study of Mrk 501 including very-high-energy (VHE) gamma-ray observations simultaneous to X-ray polarization measurements from the Imaging X-ra…