First Detection of Photons with Energy beyond 100 TeV from an Astrophysical Source.

@article{Amenomori2019FirstDO,
  title={First Detection of Photons with Energy beyond 100 TeV from an Astrophysical Source.},
  author={Michihiro Amenomori and Yiwei Bao and Xiao-Jun Bi and D. Y. Chen and T. L. Chen and W. Y. Chen and Xu Chen and Y Chen and Cirennima and S. W. Cui and Danzengluobu and Liming Ding and J. H. Fang and Kun Fang and C. F. Feng and Zhaoyang Feng and Z. Y. Feng and Qi Gao and Quan-bu Gou and Y. Q. Guo and H H He and Z. T. He and K. Hibino and Naoki Hotta and Haibing Hu and H. B. Hu and J. Huang and Huan-yu Jia and L. Jiang and H. B. Jin and Fumiyoshi Kajino and K. Kasahara and Y. Katayose and Chihiro Kato and Shigeaki Kato and K. Kawata and M. Kozai and Labaciren and Guiming Le and A. F. Li and H. J. Li and W. J. Li and Y. H. Lin and B. Liu and C X Liu and J. S. Liu and M. Y. Liu and Yu-qing Lou and H. Lu and X. R. Meng and H. Mitsui and K. Munakata and Y. Nakamura and Hajime Nanjo and Mitsuhiro Nishizawa and Munehiro Ohnishi and Itaru Ohta and Shohei Ozawa and X. Qian and Xiao-bo Qu and T. Saito and M. Sakata and Toshiaki Sako and Yasuhito Sengoku and J. Shao and M. Shibata and A. Shiomi and Hidehiko Sugimoto and Masatoshi Takita and Y. H. Tan and Nobuhito Tateyama and Shoji Torii and H. Tsuchiya and Sunday O. Udo and H. Wang and H. r. Wu and Liang Xue and Kazuki Yagisawa and Y. Yamamoto and Z. Yang and A. F. Yuan and Liuming Zhai and H. M. Zhang and J. L. Zhang and X. Zhang and X. Y. Zhang and Y. Zhang and Yi. Zhang and Ying Zhang and Zhaxisangzhu and X. X. Zhou},
  journal={Physical review letters},
  year={2019},
  volume={123 5},
  pages={
          051101
        }
}
We report on the highest energy photons from the Crab Nebula observed by the Tibet air shower array with the underground water-Cherenkov-type muon detector array. Based on the criterion of a muon number measured in an air shower, we successfully suppress 99.92% of the cosmic-ray background events with energies E>100  TeV. As a result, we observed 24 photonlike events with E>100  TeV against 5.5 background events, which corresponds to a 5.6σ statistical significance. This is the first detection… 

Figures and Tables from this paper

Multiple Galactic Sources with Emission Above 56 TeV Detected by HAWC.

We present the first catalog of gamma-ray sources emitting above 56 and 100 TeV with data from the High Altitude Water Cherenkov Observatory, a wide field-of-view observatory capable of detecting

Observation of Photons above 300 TeV Associated with a High-energy Neutrino from the Cygnus Region

Galactic sites of acceleration of cosmic rays to energies of order 1015 eV and higher, dubbed PeVatrons, reveal themselves by recently discovered gamma radiation of energies above 100 TeV. However,

Search for cosmic gamma rays of ultra-high energies with the Baksan air shower array

Recently two collaborations (Tibet ASγ and HAWC) almost simultaneously reported about their measurements of ultra-high-energy (> 100 TeV) gamma rays from the Crab Nebula. The Baksan air shower array

The Crab Pulsar and Nebula as Seen in Gamma-Rays

Slightly more than 30 years ago, Whipple detection of the Crab Nebula was the start of Very High Energy gamma-ray astronomy. Since then, gamma-ray observations of this source have continued to

MAGIC very large zenith angle observations of the Crab Nebula up to 100 TeV

Aims. We measure the Crab Nebula γ-ray spectral energy distribution in the ~100 TeV energy domain and test the validity of existing leptonic emission models at these high energies. Methods. We used

Detection of ultra-high-energy gamma rays from the Crab Nebula: physical implications

The Crab Nebula is an extreme particle accelerator that boosts the energy of electrons up to a few PeV ($10^{15} \ \rm eV$), close to the maximum energy allowed theoretically. The physical

TAIGA—an advanced hybrid detector complex for astroparticle physics and high energy gamma-ray astronomy in the Tunka valley

The TAIGA observatory addresses ground-based gamma-ray astronomy at energies from a few TeV to several PeV, cosmic ray physics from 100 TeV to several EeV as well as for search for axion-like

Carpet-3 experiment for ultrahigh-energy astrophysics: Current-state and prospects

The Carpet-3 air shower array is being built at the Baksan Neutrino Observatory, which is located near Mount Elbrus (North Caucasus) at an altitude of 1700 m above sea level. The main aim of the

Probing μeV ALPs with future LHAASO observations of AGN γ -ray spectra

Axion-like particles (ALPs) are predicted in some well-motivated theories beyond the Standard Model. The TeV gamma-rays from active galactic nuclei (AGN) suffers attenuation by the pair production

Potential PeVatron supernova remnant G106.3+2.7 seen in the highest-energy gamma rays

Cosmic rays (protons and other atomic nuclei) are believed to gain energies of petaelectronvolts (PeV) and beyond at astrophysical particle accelerators called 'PeVatrons' inside our Galaxy. Although
...

References

SHOWING 1-10 OF 41 REFERENCES

SEARCH FOR GAMMA RAYS ABOVE 100 TeV FROM THE CRAB NEBULA WITH THE TIBET AIR SHOWER ARRAY AND THE 100 m2 MUON DETECTOR

A 100 m2 muon detector (MD) was successfully constructed under the existing Tibet air shower (AS) array in the late fall of 2007. The sensitivity of the Tibet AS array to cosmic gamma rays can be

OBSERVATION AND SPECTRAL MEASUREMENTS OF THE CRAB NEBULA WITH MILAGRO

The Crab Nebula was detected with the Milagro experiment at a statistical significance of 17 standard deviations over the lifetime of the experiment. The experiment was sensitive to approximately 100

A SEARCH FOR ENHANCED VERY HIGH ENERGY GAMMA-RAY EMISSION FROM THE 2013 MARCH CRAB NEBULA FLARE

In 2013 March, a flaring episode from the Crab Nebula lasting ∼2 weeks was detected by Fermi-LAT (Large Area Telescope on board the Fermi Gamma-ray Space Telescope). The Very Energetic Radiation

Detection of Gamma Rays of up to 50 TeV from the Crab Nebula

Gamma rays with energies greater than 7 TeV from the Crab pulsar/Crab Nebula have been observed at large zenith angles, with the imaging atmospheric technique from Woomera, South Australia. CANGAROO

Observation of Multi-TeV Gamma Rays from the Crab Nebula using the Tibet Air Shower Array

This is the first observation of gamma-ray signals from point sources with a conventional air shower array using scintillation detectors, and the energy spectrum of Gamma-rays in the energy region above 3 TeV which partially overlaps those observed with imaging atmospheric Cerenkov telescopes.

Observation of TeV gamma rays from the Crab Nebula using the atmospheric Cerenkov imaging technique

The Whipple Observatory 10 m reflector, operating as a 37 pixel camera, has been used to observe the Crab Nebula in TeV gamma rays. By selecting gamma-ray images based on their predicted properties,

TeV GAMMA-RAY SURVEY OF THE NORTHERN SKY USING THE ARGO-YBJ DETECTOR

The Astrophysical Radiation with Ground-based Observatory at Yang Ba Jing (ARGO-YBJ) detector is an extensive air shower array that has been used to monitor the northern γ-ray sky at energies above

The Crab Nebula and Pulsar between 500 GeV and 80 TeV: Observations with the HEGRA Stereoscopic Air Cerenkov Telescopes

The Crab supernova remnant has been observed regularly with the stereoscopic system of five imaging air Cerenkov telescopes that was part of the High Energy Gamma Ray Astronomy (HEGRA) experiment. In

VHE γ-Ray Observation of the Crab Nebula and its Pulsar with the MAGIC Telescope

We report about very high energy (VHE) γ-ray observations of the Crab Nebula with the MAGIC telescope. The γ-ray flux from the nebula was measured between 60 GeV and 9 TeV. The energy spectrum can be