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MAGIC very large zenith angle observations of the Crab Nebula up to 100 TeV |
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| Author: | Acciari, V. A.1,2; Ansoldi, S.3,4,5; Antonelli, L. A.6; |
| Organizations: |
1Univ La Laguna, Inst Astrofis Canarias, San Cristobal la Laguna, Spain. 2Univ La Laguna, Dept Astrofis, San Cristobal la Laguna, Spain. 3Univ Udine, Udine, Italy.
4INFN Trieste, Udine, Italy.
5Kyoto Univ, Dept Phys, Japanese MAGIC Consortium, Kyoto, Japan. 6Natl Inst Astrophys INAF, Rome, Italy. 7Swiss Fed Inst Technol, Zurich, Switzerland. 8Tech Univ Dortmund, Dortmund, Germany. 9Univ Zagreb, FER, Croatian Consortium, Zagreb, Croatia. 10HBNI, Saha Inst Nucl Phys, Kolkata, India. 11CBPF, Rio De Janeiro, Brazil. 12Univ Complutense Madrid, IPARCOS Inst, Madrid, Spain. 13Univ Complutense Madrid, EMFTEL Dept, Madrid, Spain. 14Univ Lodz, Dept Astrophys, Lodz, Poland. 15Univ Siena, Siena, Italy. 16INFN Pisa, Siena, Italy. 17DESY, Zeuthen, Germany. 18Univ Padua, Padua, Italy. 19Ist Nazl Fis Nucl, Padua, Italy. 20Ist Nazl Fis Nucl, Frascati, Italy. 21Max Planck Inst Phys & Astrophys, Munich, Germany. 22BIST, IFAE, Barcelona, Spain. 23Univ Grenoble Alpes, Lab Annecy Phys Particules, Univ Savoie Mt Blanc, CNRS,LAPP, Annecy, France. 24Univ Pisa, Pisa, Italy. 25INFN Pisa, Pisa, Italy. 26NAS RA, A Alikhanyan Natl Lab, ICRANet Armenia, Armenian Consortium, Yerevan, Armenia. 27Ctr Invest Energet Medioambientales & Tecnol, Madrid, Spain. 28PIC, Barcelona, Spain. 29Univ Rijeka, Dept Phys, Croatian Consortium, Rijeka, Croatia. 30Univ Wurzburg, Wurzburg, Germany. 31Univ Turku, Finnish Ctr Astron ESO FINCA, Finnish MAGIC Consortium, Turku, Finland. 32Univ Autonoma Barcelona, Dept Fis, Beraterra, Spain. 33Univ Autonoma Barcelona, CERES IEEC, Beraterra, Spain. 34Univ Tokyo, ICRR, Japanese MAGIC Consortium, Kashiwa, Chiba, Japan. 35Univ Split, FESB, Croatian Consortium, Split, Croatia. 36Josip Juraj Strossmayer Univ Osijek, Croatian Consortium, Osijek, Croatia. 37RIKEN, Japanese MAGIC Consortium, Wako, Saitama, Japan. 38Tokai Univ, Japanese MAGIC Consortium, Hiratsuka, Kanagawa, Japan. 39Univ Trieste, Dipartimento Fis, Trieste, Italy. 40IFPU, Trieste, Italy. 41Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria. 42UB, ICCUB, IEEC, Barcelona, Spain. 43Univ Oulu, Astron Res Unit, Finnish MAGIC Consortium, Oulu, Finland. 44Rudjer Boskovic Inst, Croatian Consortium, Zagreb, Croatia. |
| Format: | article |
| Version: | published version |
| Access: | open |
| Online Access: | PDF Full Text (PDF, 1 MB) |
| Persistent link: | http://urn.fi/urn:nbn:fi-fe2020060240221 |
| Language: | English |
| Published: |
EDP Sciences,
2020
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| Publish Date: | 2020-06-02 |
| Description: |
AbstractAims: 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 the novel very large zenith angle observations with the MAGIC telescope system to increase the collection area above 10 TeV. We also developed an auxiliary procedure of monitoring atmospheric transmission in order to assure proper calibration of the accumulated data. This employs recording optical images of the stellar field next to the source position, which provides a better than 10% accuracy for the transmission measurements. Results: We demonstrate that MAGIC very large zenith angle observations yield a collection area larger than a square kilometer. In only ~ 56 h of observations, we detect the γ-ray emission from the Crab Nebula up to 100 TeV, thus providing the highest energy measurement of this source to date with Imaging Atmospheric Cherenkov Telescopes. Comparing accumulated and archival MAGIC and Fermi/LAT data with some of the existing emission models, we find that none of them provides an accurate description of the 1 GeV to 100 TeV γ-ray signal. see all
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| Series: |
Astronomy and astrophysics |
| ISSN: | 0004-6361 |
| ISSN-E: | 1432-0746 |
| ISSN-L: | 0004-6361 |
| Volume: | 635 |
| Article number: | A158 |
| DOI: | 10.1051/0004-6361/201936899 |
| OADOI: | https://oadoi.org/10.1051/0004-6361/201936899 |
| Type of Publication: |
A1 Journal article – refereed |
| Field of Science: |
115 Astronomy and space science |
| Subjects: | |
| Funding: |
The financial support of the German BMBF and MPG, the Italian INFN and INAF, the Swiss National Fund SNF, the ERDF under the Spanish MINECO (FPA2015-69818-P, FPA2012-36668, FPA2015-68378-P, FPA2015-69210-C6-2-R, FPA2015-69210-C6-4-R, FPA2015-69210-C6-6-R, AYA2015-71042-P, AYA2016-76012-C3-1-P, ESP2015-71662-C2-2-P, FPA2017-90566-REDC), the Indian Department of Atomic Energy, the Japanese JSPS and MEXT, the Bulgarian Ministry of Education and Science, National RI Roadmap Project DO1-153/28.08.2018 and the Academy of Finland grant nr. 320045 is gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia “Severo Ochoa” SEV-2016-0588 and SEV-2015-0548, and Unidad de Excelencia “María de Maeztu” MDM-2014-0369, by the Croatian Science Foundation (HrZZ) Project IP-2016-06-9782 and the University of Rijeka Project 13.12.1.3.02, by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, the Polish National Research Centre grant UMO-2016/22/M/ST9/00382 and by the Brazilian MCTIC, CNPq and FAPER. |
| Academy of Finland Grant Number: |
320045 |
| Detailed Information: |
320045 (Academy of Finland Funding decision) |
| Copyright information: |
© MAGIC Collaboration 2020. Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
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https://creativecommons.org/licenses/by/4.0/ |