J. L. Contreras

Multi-wavelength properties of EHSP blazars

Miguel J. A. Láinez, M. Nievas Rosillo, A. Domínguez, J. L. Contreras et autres

es, in (code pays fourni par la source)

Constraints on the VHE Counterpart of Two Binary Black Hole Mergers Observed by the MAGIC and CTAO LST-1 Telescopes

K. Abe, S. Abe, J. Abhir, A. Abhishek et autres

Abstract We present very-high-energy gamma-ray observations of two binary black hole merger candidates, GW240615_113620 and GW241125_010116, performed with the Major Atmospheric Gamma Imaging Cherenkov (MAGIC) telescopes and the first Large-Sized Telescope of the Cherenkov Telescope Array Observatory’s (CTAO LST-1). GW240615_113620 was the …

jp, ch, it, es, fr, us, de, hr, in, ec, br, pl, am, cz (code pays fourni par la source)

The January 2010 flare of Mrk 421: Insights from a stochastic acceleration model

K. Abe, S. Abe, J. Abhir, A. Abhishek et autres

Context. Mrk 421 displayed its highest flux state ever observed in February 2010 with very high tera-electronvolt fluxes and interesting cross-band correlations and a spectral energy distribution (SED) evolution not entirely consistent with the standard single zone leptonic synchrotron self-Compton model. The …

jp, ch, it, es, de, hr, in, br, pl, no, am, au (code pays fourni par la source)

VHE γ-ray observations of bright BL Lacs with the Large-Sized Telescope prototype (LST-1) of the CTAO

K. Abe, S. Abe, A. Abhishek, F. Acero et autres

ABSTRACT Cherenkov Telescope Array Observatory (CTAO) is the next-generation ground-based $\gamma$-ray observatory operating in the energy range from $20\, \mathrm{GeV}$ up to $300\, \mathrm{TeV}$, with two sites in La Palma (Spain) and Paranal (Chile). It will consist of telescopes of three sizes, …

jp, it, fr, es, ch, de, ec, br, pl, us, cz, hr, fi (code pays fourni par la source)

Next-day data processing for the LST-1 and MAGIC Cherenkov Telescopes

Adithiya Dinesh, María Láinez, Daniel Morcuende, Abelardo Moralejo et autres

The MAGIC and LST-1 telescopes, located at the Roque de los Muchachos Observatory on La Palma, operate dedicated On-Site Analysis (OSA) pipelines that provide rapid, automated processing of observational data. These systems produce high-level data products just a few hours after observations …

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Exploring the most extreme gamma-ray blazars using broadband spectral energy distributions

Miguel J. A. Láinez, M. Nievas Rosillo, A. Domínguez, J. L. Contreras et autres

Context . Extreme high-synchrotron peaked blazars (EHSPs) are rare high-energy sources characterised by synchrotron peaks beyond 10 17 Hz in their spectral energy distributions (SEDs). Their extreme properties challenge conventional blazar emission models and provide a unique opportunity to test the limits …

GRB 221009A: Observations with LST-1 of CTAO and Implications for Structured Jets in Long Gamma-Ray Bursts

K. Abe, S. Abe, A. Abhishek, F. Acero et autres

Abstract GRB 221009A is the brightest gamma-ray burst (GRB) observed to date. Extensive observations of its afterglow emission across the electromagnetic spectrum were performed, providing the first strong evidence of a jet with a nontrivial angular structure in a long GRB. We …

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Galactic transient sources with the Cherenkov Telescope Array Observatory

K. Abe, S. Abe, J. Abhir, A. Abhishek et autres

ABSTRACT 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-wind nebulae. Although most of them can …

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

S. Abe, J. Abhir, A. Abhishek, V. A. Acciari et autres

Abstract 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 Model. We present …

jp, ch, it, es, de, hr, br, pl, no, am, fi, fr (code pays fourni par la source)

Exploring the Most Extreme Gamma-Ray Blazars Using Broadband Spectral Energy Distributions

Miguel J. A. Láinez, M. Nievas Rosillo, A. Domínguez, J. L. Contreras et autres

Extreme high-synchrotron peaked blazars (EHSPs) are rare high-energy sources characterised by synchrotron peaks beyond 10$^{17}$ Hz in their spectral energy distributions (SEDs). Their extreme properties challenge conventional blazar emission models and provide a unique opportunity to test the limits of particle acceleration …

A new method of reconstructing images of gamma-ray telescopes applied to the LST-1 of CTAO

K. Abe, S. Abe, A. Abhishek, F. Acero et autres

Context. Imaging atmospheric Cherenkov telescopes (IACTs) are used to observe very high-energy photons from the ground. Gamma rays are indirectly detected through the Cherenkov light emitted by the air showers they induce. The new generation of experiments, in particular the Cherenkov Telescope …

jp, it, fr, es, ch, de, ec, br, pl, cz, hr, fi (code pays fourni par la source)

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

S. Abe, J. Abhir, A. Abhishek, V.A. Acciari et autres

ABSTRACT 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 dust structure known as dusty torus. The intense …

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