activity
20032026
most citedPrecise measurement of the cross section at center-of-mass energies from 3.77 to 4.60 GeV

264 citations · 4.4k across the 157 of their papers we have counts for

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Showing astro-ph.HEShow all

14 papers · 1 filter

astro-ph.HE2026

LHAASO-WCDA observed a 5 days TeV-delayed flaring event in blazar 1ES 1959+650

Zhen Cao, F. Aharonian, Y. X. Bai +339

We report a day-scale hard lag between GeV and TeV -ray emission from the HBL 1ES~1959+650 in early 2024. Since the LHAASO-WCDA real-time monitoring system began operation in la…

astro-ph.HE2026

Extreme PeV accelerator associated with GRS 1915+105

Zhen Cao, F. Aharonian, Y. X. Bai +322

Microquasars, binary systems featuring relativistic jets, have emerged as sources for particle acceleration beyond PeV energies. We present a study of the broadband -ray emissio…

astro-ph.HE2025

LHAASO Detection of Ultra-High-Energy Gamma-Ray Emission toward the Giant Molecular Clouds

Zhen Cao, F. Aharonian, Y. X. Bai +310

The -ray from Giant molecular clouds (GMCs) is regarded as the most ideal tool to perform in-situ measurement of cosmic ray (CR) density and spectra in our Galaxy. We report the…

astro-ph.HE2025

Energy calibration of LHAASO-KM2A using the cosmic ray Moon shadow

Zhen Cao, F. Aharonian, Y. X. Bai +323

We present a precise measurement of the westward, rigidity-dependent shift of the Moon's shadow using three and a half years of cosmic-ray data collected by the Kilometer Square Ar…

astro-ph.HE2025

All-sky search for individual Primordial Black Hole bursts with LHAASO

Zhen Cao, F. Aharonian, Y. X. Bai +311

Primordial Black Holes~(PBHs) are hypothetical black holes with a wide range of masses that formed in the early universe. As a result, they may play an important cosmological role…

astro-ph.HE2024★ 8 cited

Evidence for particle acceleration approaching PeV energies in the W51 complex

The LHAASO Collaboration, Zhen Cao, F. Aharonian +284

The -ray emission from the W51 complex is widely acknowledged to be attributed to the interaction between the cosmic rays (CRs) accelerated by the shock of supernova remnant (SN…

astro-ph.HE2022★ 11 cited

Flux Variations of Cosmic Ray Air Showers Detected by LHAASO-KM2A During a Thunderstorm on 10 June 2021

LHAASO Collaboration, F. Aharonian, Q. An +268

The Large High Altitude Air Shower Observatory (LHAASO) has three sub-arrays, KM2A, WCDA and WFCTA. The flux variations of cosmic ray air showers were studied by analyzing the KM2A…

astro-ph.HE2015★ 63 cited

4.5 years multi-wavelength observations of Mrk 421 during the ARGO-YBJ and Fermi common operation time

B. Bartoli, P. Bernardini, X. J. Bi +68

We report on the extensive multi-wavelength observations of the blazar Markarian 421 (Mrk 421) covering radio to gamma-rays, during the 4.5 year period of ARGO-YBJ and Fermi common…

astro-ph.HE2015★ 127 cited

The Knee of the Cosmic Hydrogen and Helium Spectrum below 1 PeV Measured by ARGO-YBJ and a Cherenkov Telescope of LHAASO

B. Bartoli, P. Bernardini, X. J. Bi +93

The measurement of cosmic ray energy spectra, in particular for individual species, is an essential approach in finding their origin. Locating the "knees" of the spectra is an impo…

astro-ph.HE2014★ 99 cited

Identification of the TeV Gamma-ray Source ARGO J2031+4157 with the Cygnus Cocoon

YBJ Collaboration, B. Bartoli, P. Bernardini +80

The extended TeV gamma-ray source ARGO J2031+4157 (or MGRO J2031+41) is positionally consistent with the Cygnus Cocoon discovered by -LAT at GeV energies in the Cygnus super…

astro-ph.HE2014★ 31 cited

Energy Spectrum of Cosmic Protons and Helium Nuclei by a Hybrid Measurement at 4300 m a.s.l

B. Bartoli, P. Bernardini, X. J. Bi +97

The energy spectrum of cosmic Hydrogen and Helium nuclei has been measured, below the so-called "knee", by using a hybrid experiment with a wide field-of-view Cherenkov telescope a…

astro-ph.HE2013★ 84 cited

TeV gamma-ray survey of the Northern sky using the ARGO-YBJ detector

YBJ Collaboration, B. Bartoli, P. Bernardini +94

The ARGO-YBJ detector is an extensive air shower array that has been used to monitor the northern -ray sky at energies above 0.3 TeV from 2007 November to 2013 January. In this…

astro-ph.HE2012★ 57 cited

Observation of TeV gamma rays from the Cygnus region with the ARGO-YBJ experiment

B. Bartoli, P. Bernardini, X. J. Bi +100

We report the observation of TeV gamma-rays from the Cygnus region using the ARGO-YBJ data collected from 2007 November to 2011 August. Several TeV sources are located in this regi…

astro-ph.HE2009★ 23 cited

The Evolutionary Slope within the Decay Phase of "FRED" Gamma-ray Burst Pulses

Z. Y. Peng, L. Ma, X. H. Zhao +3

Employing two samples containing of 56 and 59 well-separated FRED (fast rise and exponential decay) gamma-ray burst (GRB) pulses whose spectra are fitted by the Band spectrum and C…