R. Carraro

VHE gamma-ray intranight variability from BL Lacertae during the extreme flaring state of 2022

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

BL Lacertae (BL Lac), the archetypal blazar of its subclass and one of the most studied blazars in the last decades, has undergone a series of major multi-wavelength outbursts since 2020, resulting in its highest recorded $γ$-ray flare to date between September …

es, it (code pays fourni par la source)

CTAO LST–1 observations of magnetar SGR 1935+2154: Deep limits on sub-second bursts and persistent tera-electronvolt emission

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

Context. The Galactic magnetar SGR 1935+2154 has exhibited prolific high-energy (HE) bursting activity in recent years. Aims. Investigating its potential tera-electronvolt counterpart could provide insights into the underlying mechanisms of magnetar emission and very high-energy (VHE) processes in extreme astrophysical environments. We …

CTAO LST-1 observations of magnetar SGR 1935+2154: Deep limits on sub-second bursts and persistent tera-electronvolt emission

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

The Galactic magnetar SGR 1935+2154 has exhibited prolific high-energy (HE) bursting activity in recent years. Investigating its potential tera-electronvolt counterpart could provide insights into the underlying mechanisms of magnetar emission and very high-energy (VHE) processes in extreme astrophysical environments. We aim to …

fr, jp (code pays fourni par la source)

CTAO LST–1 observations of magnetar SGR 1935+2154: Deep limits on sub-second bursts and persistent tera-electronvolt emission

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

Context. The Galactic magnetar SGR 1935+2154 has exhibited prolific high-energy (HE) bursting activity in recent years. Aims. Investigating its potential tera-electronvolt counterpart could provide insights into the underlying mechanisms of magnetar emission and very high-energy (VHE) processes in extreme astrophysical environments. We …

jp, it, fr, us, es, ch, de, ec, br, pl, cz, hr, fi (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)

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

The CTAO-LST Project, K. Abe, A. Abhishek, F. Acero et autres

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

fr (code pays fourni par la source)

Constraining the TeV gamma-ray emission of SN 2024bch, a possible type IIn-L from a red supergiant progenitor

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

We present very high-energy optical photometry and spectroscopic observations of SN 2024bch in the nearby galaxy NGC 3206 (∼20 Mpc). We used gamma-ray observations performed with the first Large-Sized Telescope (LST-1) of the Cherenkov Telescope Array Observatory (CTAO) and optical observations with …

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

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 …

fr (code pays fourni par la source)

Detection of the Geminga pulsar at energies down to 20 GeV with the LST-1 of CTAO

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

Context. Geminga is the third gamma-ray pulsar firmly detected by imaging atmospheric Cherenkov telescopes (IACTs) after the Crab and the Vela pulsars. Most of its emission is expected at tens of giga-electronvolts, and, out of the planned telescopes of the upcoming Cherenkov …

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

Multiwavelength monitoring of the nucleus in PBC J2333.9−2343: the giant radio galaxy with a blazar-like core

L. Hernández-García, F. Panessa, G. Bruni, L. Bassani et autres

ABSTRACT PBC J2333.9−2343 is a giant radio galaxy at z = 0.047 with a bright central core associated to a blazar nucleus. If the nuclear blazar jet is a new phase of the jet activity, then the small orientation angle suggests a …

cl, it, mx, de, ch, us (code pays fourni par la source)

Erratum: “Identification of Single Spectral Lines in Large Spectroscopic Surveys Using UMLAUT: an Unsupervised Machine-learning Algorithm Based on Unbiased Topology” (2021, ApJS, 257, 67)

Ivano Baronchelli, Claudia Scarlata, L. Rodríguez-Muñoz, Matteo Bonato et autres

Due to an error at the publisher two symbol errors were introduced. 1. In Section 3.1, in list item 1 “Data samples that are similar in a sufficiently large amount of independent dimensions (N=) tend to be similar also when considering an …

it, us, Afrique du Sud, cl, ch, fr, au, cn, gb (code pays fourni par la source)

Localizing narrow Fe Kαemission within bright AGN

Carolina Andonie, F. E. Bauer, R. Carraro, P. Arévalo et autres

Context.The 6.4 keV Fe Kαemission line is a ubiquitous feature in X-ray spectra of active galactic nuclei (AGN), and its properties track the interaction between the variable primary X-ray continuum and the surrounding structure from which it arises. Aims.We clarify the nature …

cl, gb, us, de, cn (code pays fourni par la source)