Explanipedia

Prospects for dark matter observations in dwarf spheroidal galaxies with the Cherenkov Telescope Array Observatory Open

K. Abe, Shinsuke Abe, J. Abhir, A. Abhishek, F. Acero , et al. · 2025

The dwarf spheroidal galaxies (dSphs) orbiting the Milky Way are widely regarded as systems supported by velocity dispersion against self-gravity, and as prime targets for the search for indirect dark matter (DM) signatures in the GeV-to-T…

Ionization quenching factors and -values of low-energy H and He ions in Ar gas at low pressure measured with a bulk resistive MICROMEGAS Open

A. Foresi, Giulio Antonelli, C. Avanzini, G. Balestri, G. Bigongiari , et al. · 2025

Very-high-energy observations of the Seyfert galaxy NGC 4151 with MAGIC -- Indication of another gamma-ray obscured candidate neutrino source Open

K. Abe, S. Abe, J. Abhir, A. Abhishek, V.A Acciari , et al. · 2025

Seyfert galaxies are emerging as a promising source class of high-energy neutrinos. The Seyfert galaxies NGC 4151 and NGC 1068 have come up respectively as the most promising counterparts of a 3$σ$ and of a 4.2$σ$ neutrino excesses detecte…

Galactic transient sources with the Cherenkov Telescope Array Observatory Open

K. Abe, S. Abe, J. Abhir, A. Abhishek, F. Acero , et al. · 2025

A wide variety of Galactic sources show transient emission at soft and hard X-ray energies: low- and high-mass X-ray binaries containing compact objects, isolated neutron stars exhibiting extreme variability as magnetars as well as pulsar-…

Combined search in dwarf spheroidal galaxies for branon dark matter annihilation signatures with the MAGIC telescopes Open

S. Abe, J. Abhir, A. Abhishek, V. A. Acciari, Arnau Aguasca-Cabot , et al. · 2025

Massive brane fluctuations, called branons, behave as weakly interacting massive particles, which is one of the most favored class of candidates to fulfill the role of the dark matter (DM), an elusive kind of matter beyond the Standard Mod…

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

K. Abe, S. Abe, J. Abhir, A. Abhishek, V. A. Acciari , et al. · 2025

Context. Blazars exhibit strong variability across the entire electromagnetic spectrum, including periods of high-flux states commonly known as flares. The physical mechanisms in blazar jets responsible for flares remain poorly understood …

Characterization of Markarian 421 during its most violent year: Multiwavelength variability and correlations Open

K. Abe, S. Abe, J. Abhir, A. Abhishek, V. A. Acciari , et al. · 2025

Aims. Mrk 421 was in its most active state around early 2010, which led to the highest TeV gamma-ray flux ever recorded from any active galactic nuclei (AGN). We aim to characterize the multiwavelength behavior during this exceptional year…

Cosmic-ray acceleration and escape from supernova remnant W44 as probed by Fermi-LAT and MAGIC Open

Stanley K. Abe, J. Abhir, A. Abhishek, V. A. Acciari, Arnau Aguasca-Cabot , et al. · 2025

Context. The supernova remnant (SNR) W44 and its surroundings are a prime target for studying the acceleration of cosmic rays (CRs). Several previous studies established an extended gamma-ray emission that is set apart from the radio shell…

Multiwavelength study of OT 081: broadband modelling of a transitional blazar Open

Hidetarô Abe, S. Abe, V. A. Acciari, I. Agudo, T. Aniello , et al. · 2024

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, $E\gt $ 100 GeV) $\gamma$-ray data taken by the MAGIC (Majo…

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

K. Abe, S. Abe, J. Abhir, A. Abhishek, V. A. Acciari , et al. · 2024

We study a flaring activity of the HSP Mrk421 that was characterized from radio to very-high-energy (VHE; E $>0.1$TeV) gamma rays with MAGIC, Fermi-LAT, Swift, XMM-Newton and several optical and radio telescopes. These observations include…

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

Hidetarô Abe, S. Abe, V.A Acciari, I. Agudo, T. Aniello , et al. · 2024

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, $E>$100\,GeV) $γ$-ray data taken by the MAGIC and H.E.S.S. i…

Standardised formats and open-source analysis tools for the MAGIC telescopes data Open

S. Abe, J. Abhir, A. Abhishek, V.A. Acciari, Arnau Aguasca-Cabot , et al. · 2024

Constraints on VHE gamma-ray emission of flat spectrum radio quasars with the MAGIC telescopes Open

S. Abe, J. Abhir, A. Abhishek, V.A. Acciari, Arnau Aguasca-Cabot , et al. · 2024

Flat spectrum radio quasars (FSRQs) constitute a class of jetted active galaxies characterized by a very luminous accretion disc, prominent and rapidly moving line-emitting cloud structures (broad-line region, BLR), and a surrounding dense…

Prospects for γ-ray observations of the Perseus galaxy cluster with the Cherenkov Telescope Array Open

K. Abe, S. Abe, F. Acero, A. Acharyya, R. Adam , et al. · 2024

Galaxy clusters are expected to be both dark matter (DM) reservoirs and storage rooms for the cosmic-ray protons (CRp) that accumulate along the cluster's formation history. Accordingly, they are excellent targets to search for signals of …

Prospects for a survey of the galactic plane with the Cherenkov Telescope Array Open

S. Abe, J. Abhir, A. Abhishek, F. Acero, A. Acharyya , et al. · 2024

Approximately one hundred sources of very-high-energy (VHE) gamma rays are known in the Milky Way, detected with a combination of targeted observations and surveys. A survey of the entire Galactic Plane in the energy range from a few tens …

Standardised formats and open-source analysis tools for the MAGIC telescopes data Open

S. Abe, J. Abhir, A. Abhishek, V. A. Acciari, Arnau Aguasca-Cabot , et al. · 2024

Instruments for gamma-ray astronomy at Very High Energies ($E>100\,{\rm GeV}$) have traditionally derived their scientific results through proprietary data and software. Data standardisation has become a prominent issue in this field both …

Constraints on Lorentz invariance violation from the extraordinary Mrk 421 flare of 2014 using a novel analysis method Open

S. Abe, J. Abhir, A. Abhishek, V. A. Acciari, Arnau Aguasca-Cabot , et al. · 2024

The Lorentz Invariance Violation (LIV), a proposed consequence of certain quantum gravity (QG) scenarios, could instigate an energy-dependent group velocity for ultra-relativistic particles. This energy dependence, although suppressed by t…

Dark matter line searches with the Cherenkov Telescope Array Open

S. Abe, J. Abhir, A. Abhishek, F. Acero, A. Acharyya , et al. · 2024

Monochromatic gamma-ray signals constitute a potential smoking gun signature for annihilating or decaying dark matter particles that could relatively easily be distinguished from astrophysical or instrumental backgrounds. We provide an upd…

Performance and first measurements of the MAGIC stellar intensity interferometer Open

S. Abe, J. Abhir, V. A. Acciari, Arnau Aguasca-Cabot, I. Agudo , et al. · 2024

In recent years, a new generation of optical intensity interferometers has emerged, leveraging the existing infrastructure of Imaging Atmospheric Cherenkov Telescopes (IACTs). The MAGIC telescopes host the MAGIC-SII system (Stellar Intensi…

Performance and first measurements of the MAGIC stellar intensity interferometer Open

MAGIC Collaboration, S. Abe, J. Abhir, V. A. Acciari, Arnau Aguasca-Cabot , et al. · 2024

In recent years, a new generation of optical intensity interferometers has emerged, leveraging the existing infrastructure of Imaging Atmospheric Cherenkov Telescopes (IACTs). The MAGIC telescopes host the MAGIC-SII system (Stellar Intensi…

The variability patterns of the TeV blazar PG 1553 + 113 from a decade of MAGIC and multiband observations Open

Hidetarô Abe, S. Abe, J. Abhir, V. A. Acciari, I. Agudo , et al. · 2024

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 better understand its properties and identify the under…

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

S. Abe, J. Abhir, V. A. Acciari, Arnau Aguasca-Cabot, I. Agudo , et al. · 2024

Aims. We present the first multiwavelength study of Mrk 501 that contains simultaneous very-high-energy (VHE) γ -ray observations and X-ray polarization measurements from the Imaging X-ray Polarimetry Explorer (IXPE). Methods. We used radi…

First characterization of the emission behavior of Mrk 421 from radio to very high-energy gamma rays with simultaneous X-ray polarization measurements Open

S. Abe, J. Abhir, V. A. Acciari, I. Agudo, T. Aniello , et al. · 2024

Aims. We have performed the first broadband study of Mrk 421 from radio to TeV gamma rays with simultaneous measurements of the X-ray polarization from IXPE. Methods. The data were collected as part of an extensive multiwavelength campaign…

Constraints on axion-like particles with the Perseus Galaxy Cluster with MAGIC Open

Hidetarô Abe, S. Abe, J. Abhir, V. A. Acciari, I. Agudo , et al. · 2024

Constraints on axion-like particles with the Perseus Galaxy Cluster with MAGIC Open

MAGIC Collaboration, Hidetarô Abe, S. Abe, J. Abhir, V. A. Acciari , et al. · 2024

Axion-like particles (ALPs) are pseudo-Nambu-Goldstone bosons that emerge in various theories beyond the standard model. These particles can interact with high-energy photons in external magnetic fields, influencing the observed gamma-ray …

MAGIC detection of GRB 201216C at<i>z</i> = 1.1 Open

Hidetarô Abe, S. Abe, V. A. Acciari, I. Agudo, T. Aniello , et al. · 2023

Gamma-ray bursts (GRBs) are explosive transient events occurring at cosmological distances, releasing a large amount of energy as electromagnetic radiation over several energy bands. We report the detection of the long GRB 201216C by the M…

Chasing Gravitational Waves with the Cherenkov Telescope Array Open

Jarred Gershon Green, M. Seglar-Arroyo, CTA Consortium, NULL AUTHOR_ID, Kazuki Abe , et al. · 2023

The detection of gravitational waves from a binary neutron star merger by Advanced LIGO and Advanced Virgo (GW170817), along with the discovery of the electromagnetic counterparts of this gravitational wave event, ushered in a new era of m…

Performance of the joint LST-1 and MAGIC observations evaluated with Crab Nebula data Open

Hidetarô Abe, K. Abe, S. Abe, V.A Acciari, Arnau Aguasca-Cabot , et al. · 2023

Aims. Large-Sized Telescope 1 (LST-1), the prototype for the Large-Sized Telescope at the upcoming Cherenkov Telescope Array Observatory, is concluding its commissioning phase at the Observatorio del Roque de los Muchachos on the island of…

Prospects for $γ$-ray observations of the Perseus galaxy cluster with the Cherenkov Telescope Array Open

The Cherenkov Telescope Array Consortium, NULL AUTHOR_ID, K. Abe, S. Abe, F. Acero , et al. · 2023

Galaxy clusters are expected to be dark matter (DM) reservoirs and storage rooms for the cosmic-ray protons (CRp) that accumulate along the cluster's formation history. Accordingly, they are excellent targets to search for signals of DM an…

Constraints to axion-like particles with the Perseus Galaxy Cluster with MAGIC Open

Giacomo D’Amico, Hyuga Abe, Shotaro Abe, J. Abhir, V. A. Acciari , et al. · 2023

Axion-like particles (ALPs) are pseudo-Nambu-Goldston bosons that appear in theories beyond the standard model and are capable of converting to photons in the presence of magnetic fields. Such interaction can have an observable effect on t…

R. Carosi YOU? Author Swipe