K. H. Lee

First Time-Resolved Leader Spectra associated with a Downward Terrestrial Gamma-Ray Flash detected at the Telescope Array Surface Detector

N. Kieu, Rasha Abbasi, Marcelo M. F. Saba, John Belz et autres

Optical emissions associated with Terrestrial Gamma-ray Flashes (TGFs) have recently become important subjects in space-based and ground-based observations since these emissions play crucial roles in understanding the generation of TGFs during thunderstorms. In this paper, we present the first time-resolved leader spectra …

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First Time-Resolved Leader Spectra associated with a Downward Terrestrial Gamma-Ray Flash detected at the Telescope Array Surface Detector

N. Kieu, Rasha Abbasi, Marcelo M. F. Saba, John Belz et autres

Optical emissions associated with Terrestrial Gamma-ray Flashes (TGFs) have recently become important subjects in space-based and ground-based observations since these emissions play crucial roles in understanding the generation of TGFs during thunderstorms. In this paper, we present the first time-resolved leader spectra …

us, br, es, kr, jp, ru, si, pl, rs (code pays fourni par la source)

Observation of Declination Dependence in the Cosmic Ray Energy Spectrum

The Telescope Array Collaboration, T. Abu‐Zayyad, Monica Allen, John Belz et autres

We report on an observation of the difference between northern and southern skies of the ultrahigh energy cosmic ray energy spectrum with a significance of ${\sim}8σ$. We use measurements from the two largest experiments$\unicode{x2014}$the Telescope Array observing the northern hemisphere and the …

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A Study on Total System Error Analysis and Monitoring/Alerting for UAM’s Performance-based Navigation

K. H. Lee, Hoijo Jeong, Jinyoung Suk, Seungkeun Kim

The total system error in urban air mobility is examined by monitoring and alerting of issues at the corridor within performance-based navigation. The various components constituting the system should be scrutinized to ascertain the inherent error characteristics. In instances of flight technical …

First High‐Speed Video Camera Observations of a Lightning Flash Associated With a Downward Terrestrial Gamma‐Ray Flash

Rasha Abbasi, Marcelo M. F. Saba, John Belz, P. R. Krehbiel et autres

Abstract In this paper, we present the first high‐speed video observation of a cloud‐to‐ground lightning flash and its associated downward‐directed Terrestrial Gamma‐ray Flash (TGF). The optical emission of the event was observed by a high‐speed video camera running at 40,000 frames per …

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First High-speed Video Camera Observations of a Lightning Flash Associated with a Downward Terrestrial Gamma-ray Flash

Marcelo M. F. Saba, John Belz, P. R. Krehbiel, W. Rison et autres

In this paper, we present the first high-speed video observation of a cloud-to-ground lightning flash and its associated downward-directed Terrestrial Gamma-ray Flash (TGF). The optical emission of the event was observed by a high-speed video camera running at 40,000 frames per second …

Indications of a Cosmic Ray Source in the Perseus-Pisces Supercluster

Telescope Array Collaboration, T. Abu‐Zayyad, M. Allen, Y. Arai et autres

The Telescope Array Collaboration has observed an excess of events with $E \ge 10^{19.4} ~{\rm eV}$ in the data which is centered at (RA, dec) = ($19^\circ$, $35^\circ$). This is near the center of the Perseus-Pisces supercluster (PPSC). The PPSC is about …

Surface detectors of the TAx4 experiment

Rasha Abbasi, Mitsuru Abe, T. Abu-Zayyad, M. Allen et autres

Telescope Array (TA) is the largest ultrahigh energy cosmic-ray (UHECR) observatory in the Northern Hemisphere. It explores the origin of UHECRs by measuring their energy spectrum, arrival-direction distribution, and mass composition using a surface detector (SD) array covering approximately 700 km$^2$ and …

The Cosmic-Ray Composition between 2 PeV and 2 EeV Observed with the TALE Detector in Monocular Mode

Mitsuru Abe, T. Abu‐Zayyad, M. Allen, Yuto Arai et autres

Abstract We report on a measurement of the cosmic-ray composition by the Telescope Array Low-energy Extension (TALE) air fluorescence detector (FD). By making use of the Cherenkov light signal in addition to air fluorescence light from cosmic-ray (CR)-induced extensive air showers, the …

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Evidence for a Supergalactic Structure of Magnetic Deflection Multiplets of Ultra-high-energy Cosmic Rays

Rasha Abbasi, Mitsuru Abe, T. Abu‐Zayyad, M. Allen et autres

Abstract Evidence for a large-scale supergalactic cosmic-ray multiplet (arrival directions correlated with energy) structure is reported for ultra-high-energy cosmic-ray (UHECR) energies above 1019 eV using 7 years of data from the Telescope Array (TA) surface detector and updated to 10 years. Previous …

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Search for Large-scale Anisotropy on Arrival Directions of Ultra-high-energy Cosmic Rays Observed with the Telescope Array Experiment

Rasha Abbasi, Mitsuru Abe, T. Abu‐Zayyad, M. Allen et autres

Abstract Motivated by the detection of a significant dipole structure in the arrival directions of ultra-high-energy cosmic rays above 8 EeV reported by the Pierre Auger Observatory (Auger), we search for a large-scale anisotropy using data collected with the surface detector array …

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Evidence for a Supergalactic Structure of Magnetic Deflection Multiplets of Ultra-High Energy Cosmic Rays

Telescope Array Collaboration, Mitsuru Abe, T. Abu‐Zayyad, M. Allen et autres

Evidence for a large-scale supergalactic cosmic ray multiplet (arrival directions correlated with energy) structure is reported for ultra-high energy cosmic ray (UHECR) energies above 10$^{19}$ eV using seven years of data from the Telescope Array (TA) surface detector and updated to 10 …

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