First results on the performance of the HEGRA IACT array

A. Daum; G. Hermann; M. Heß; W. Hofmann; H. Lampeitl; G. Pühlhofer; F. Aharonian; A. G. Akhperjanian; J. A. Barrio; A. S. Beglarian; K. Bernlöhr; J. J.G. Beteta; S. M. Bradbury; J. L. Contreras; J. Cortina; T. Deckers; E. Feigl; J. Fernandez; V. Fonseca; A. Fraß; B. Funk; J. C. Gonzalez; G. Heinzelmann; M. Hemberger; A. Heusler; I. Holl; D. Horns; R. Kankanyan; O. Kirstein; C. Köhler; A. Konopelko; D. Kranich; H. Krawczynski; H. Kornmayer; A. Lindner; E. Lorenz; N. Magnussen; H. Meyer; R. Mirzoyan; H. Möller; A. Moralejo; L. Padilla; M. Panter; D. Petry; R. Plaga; J. Prahl; C. Prosch; G. Rauterberg; W. Rhode; A. Röhring; V. Sahakian; M. Samorski; J. A. Sanchez; D. Schmele; W. Stamm; M. Ulrich; H. J. Völk; S. Westerhoff; B. Wiebel-Sooth; C. A. Wiedner; M. Willmer; H. Wirth

doi:10.1016/S0927-6505(97)00031-5

First results on the performance of the HEGRA IACT array

A. Daum, G. Hermann, M. Heß, W. Hofmann, H. Lampeitl, G. Pühlhofer, F. Aharonian, A. G. Akhperjanian, J. A. Barrio, A. S. Beglarian, K. Bernlöhr, J. J.G. Beteta, S. M. Bradbury, J. L. Contreras, J. Cortina, T. Deckers, E. Feigl, J. Fernandez, V. Fonseca, A. FraßB. Funk, J. C. Gonzalez, G. Heinzelmann, M. Hemberger, A. Heusler, I. Holl, D. Horns, R. Kankanyan, O. Kirstein, C. Köhler, A. Konopelko, D. Kranich, H. Krawczynski, H. Kornmayer, A. Lindner, E. Lorenz, N. Magnussen, H. Meyer, R. Mirzoyan, H. Möller, A. Moralejo, L. Padilla, M. Panter, D. Petry, R. Plaga, J. Prahl, C. Prosch, G. Rauterberg, W. Rhode, A. Röhring, V. Sahakian, M. Samorski, J. A. Sanchez, D. Schmele, W. Stamm, M. Ulrich, H. J. Völk, S. Westerhoff, B. Wiebel-Sooth, C. A. Wiedner, M. Willmer, H. Wirth

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Abstract

First results concerning the performance characteristics of the HEGRA IACT array are given based on stereoscopic observations of the Crab Nebula with four telescopes. The system provides a γ-ray energy threshold around 0.5 TeV. The Crab signal demonstrates an angular resolution of about 0.1°. Shape cuts allow to suppress cosmic ray background by almost a factor 100, while maintaining 40% efficiency for γ-rays. The Crab signal is essentially background free. For longer observation times of order 100 h, the system in its present form provides sensitivity to point sources at a level of 3% of the Crab flux. Performance is expected to improve further with the inclusion of the fifth telescope and the implementation of advanced algorithms for shower reconstruction.

Original language	English
Pages (from-to)	1-11
Number of pages	11
Journal	Astroparticle Physics
Volume	8
Issue number	1-2
DOIs	https://doi.org/10.1016/S0927-6505(97)00031-5
State	Published - Dec 1997

Keywords

Air showers
Crab Nebula
HEGRA IACT array

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10.1016/S0927-6505(97)00031-5

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Daum, A., Hermann, G., Heß, M., Hofmann, W., Lampeitl, H., Pühlhofer, G., Aharonian, F., Akhperjanian, A. G., Barrio, J. A., Beglarian, A. S., Bernlöhr, K., Beteta, J. J. G., Bradbury, S. M., Contreras, J. L., Cortina, J., Deckers, T., Feigl, E., Fernandez, J., Fonseca, V., ... Wirth, H. (1997). First results on the performance of the HEGRA IACT array. Astroparticle Physics, 8(1-2), 1-11. https://doi.org/10.1016/S0927-6505(97)00031-5

@article{6edc1ffacfa84a99a9a1482e3a320771,

title = "First results on the performance of the HEGRA IACT array",

abstract = "First results concerning the performance characteristics of the HEGRA IACT array are given based on stereoscopic observations of the Crab Nebula with four telescopes. The system provides a γ-ray energy threshold around 0.5 TeV. The Crab signal demonstrates an angular resolution of about 0.1°. Shape cuts allow to suppress cosmic ray background by almost a factor 100, while maintaining 40\% efficiency for γ-rays. The Crab signal is essentially background free. For longer observation times of order 100 h, the system in its present form provides sensitivity to point sources at a level of 3\% of the Crab flux. Performance is expected to improve further with the inclusion of the fifth telescope and the implementation of advanced algorithms for shower reconstruction.",

keywords = "Air showers, Crab Nebula, HEGRA IACT array",

author = "A. Daum and G. Hermann and M. He{\ss} and W. Hofmann and H. Lampeitl and G. P{\"u}hlhofer and F. Aharonian and Akhperjanian, \{A. G.\} and Barrio, \{J. A.\} and Beglarian, \{A. S.\} and K. Bernl{\"o}hr and Beteta, \{J. J.G.\} and Bradbury, \{S. M.\} and Contreras, \{J. L.\} and J. Cortina and T. Deckers and E. Feigl and J. Fernandez and V. Fonseca and A. Fra{\ss} and B. Funk and Gonzalez, \{J. C.\} and G. Heinzelmann and M. Hemberger and A. Heusler and I. Holl and D. Horns and R. Kankanyan and O. Kirstein and C. K{\"o}hler and A. Konopelko and D. Kranich and H. Krawczynski and H. Kornmayer and A. Lindner and E. Lorenz and N. Magnussen and H. Meyer and R. Mirzoyan and H. M{\"o}ller and A. Moralejo and L. Padilla and M. Panter and D. Petry and R. Plaga and J. Prahl and C. Prosch and G. Rauterberg and W. Rhode and A. R{\"o}hring and V. Sahakian and M. Samorski and Sanchez, \{J. A.\} and D. Schmele and W. Stamm and M. Ulrich and V{\"o}lk, \{H. J.\} and S. Westerhoff and B. Wiebel-Sooth and Wiedner, \{C. A.\} and M. Willmer and H. Wirth",

year = "1997",

month = dec,

doi = "10.1016/S0927-6505(97)00031-5",

language = "English",

volume = "8",

pages = "1--11",

journal = "Astroparticle Physics",

issn = "0927-6505",

number = "1-2",

}

Daum, A, Hermann, G, Heß, M, Hofmann, W, Lampeitl, H, Pühlhofer, G, Aharonian, F, Akhperjanian, AG, Barrio, JA, Beglarian, AS, Bernlöhr, K, Beteta, JJG, Bradbury, SM, Contreras, JL, Cortina, J, Deckers, T, Feigl, E, Fernandez, J, Fonseca, V, Fraß, A, Funk, B, Gonzalez, JC, Heinzelmann, G, Hemberger, M, Heusler, A, Holl, I, Horns, D, Kankanyan, R, Kirstein, O, Köhler, C, Konopelko, A, Kranich, D, Krawczynski, H, Kornmayer, H, Lindner, A, Lorenz, E, Magnussen, N, Meyer, H, Mirzoyan, R, Möller, H, Moralejo, A, Padilla, L, Panter, M, Petry, D, Plaga, R, Prahl, J, Prosch, C, Rauterberg, G, Rhode, W, Röhring, A, Sahakian, V, Samorski, M, Sanchez, JA, Schmele, D, Stamm, W, Ulrich, M, Völk, HJ, Westerhoff, S, Wiebel-Sooth, B, Wiedner, CA, Willmer, M & Wirth, H 1997, 'First results on the performance of the HEGRA IACT array', Astroparticle Physics, vol. 8, no. 1-2, pp. 1-11. https://doi.org/10.1016/S0927-6505(97)00031-5

TY - JOUR

T1 - First results on the performance of the HEGRA IACT array

AU - Daum, A.

AU - Hermann, G.

AU - Heß, M.

AU - Hofmann, W.

AU - Lampeitl, H.

AU - Pühlhofer, G.

AU - Aharonian, F.

AU - Akhperjanian, A. G.

AU - Barrio, J. A.

AU - Beglarian, A. S.

AU - Bernlöhr, K.

AU - Beteta, J. J.G.

AU - Bradbury, S. M.

AU - Contreras, J. L.

AU - Cortina, J.

AU - Deckers, T.

AU - Feigl, E.

AU - Fernandez, J.

AU - Fonseca, V.

AU - Fraß, A.

AU - Funk, B.

AU - Gonzalez, J. C.

AU - Heinzelmann, G.

AU - Hemberger, M.

AU - Heusler, A.

AU - Holl, I.

AU - Horns, D.

AU - Kankanyan, R.

AU - Kirstein, O.

AU - Köhler, C.

AU - Konopelko, A.

AU - Kranich, D.

AU - Krawczynski, H.

AU - Kornmayer, H.

AU - Lindner, A.

AU - Lorenz, E.

AU - Magnussen, N.

AU - Meyer, H.

AU - Mirzoyan, R.

AU - Möller, H.

AU - Moralejo, A.

AU - Padilla, L.

AU - Panter, M.

AU - Petry, D.

AU - Plaga, R.

AU - Prahl, J.

AU - Prosch, C.

AU - Rauterberg, G.

AU - Rhode, W.

AU - Röhring, A.

AU - Sahakian, V.

AU - Samorski, M.

AU - Sanchez, J. A.

AU - Schmele, D.

AU - Stamm, W.

AU - Ulrich, M.

AU - Völk, H. J.

AU - Westerhoff, S.

AU - Wiebel-Sooth, B.

AU - Wiedner, C. A.

AU - Willmer, M.

AU - Wirth, H.

PY - 1997/12

Y1 - 1997/12

N2 - First results concerning the performance characteristics of the HEGRA IACT array are given based on stereoscopic observations of the Crab Nebula with four telescopes. The system provides a γ-ray energy threshold around 0.5 TeV. The Crab signal demonstrates an angular resolution of about 0.1°. Shape cuts allow to suppress cosmic ray background by almost a factor 100, while maintaining 40% efficiency for γ-rays. The Crab signal is essentially background free. For longer observation times of order 100 h, the system in its present form provides sensitivity to point sources at a level of 3% of the Crab flux. Performance is expected to improve further with the inclusion of the fifth telescope and the implementation of advanced algorithms for shower reconstruction.

AB - First results concerning the performance characteristics of the HEGRA IACT array are given based on stereoscopic observations of the Crab Nebula with four telescopes. The system provides a γ-ray energy threshold around 0.5 TeV. The Crab signal demonstrates an angular resolution of about 0.1°. Shape cuts allow to suppress cosmic ray background by almost a factor 100, while maintaining 40% efficiency for γ-rays. The Crab signal is essentially background free. For longer observation times of order 100 h, the system in its present form provides sensitivity to point sources at a level of 3% of the Crab flux. Performance is expected to improve further with the inclusion of the fifth telescope and the implementation of advanced algorithms for shower reconstruction.

KW - Air showers

KW - Crab Nebula

KW - HEGRA IACT array

UR - https://www.scopus.com/pages/publications/0031541410

U2 - 10.1016/S0927-6505(97)00031-5

DO - 10.1016/S0927-6505(97)00031-5

M3 - Article

AN - SCOPUS:0031541410

SN - 0927-6505

VL - 8

SP - 1

EP - 11

JO - Astroparticle Physics

JF - Astroparticle Physics

IS - 1-2

ER -

First results on the performance of the HEGRA IACT array

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Keywords

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