First results on the performance of the HEGRA IACT array

被引：176

作者：

Daum, A

Hermann, G

Hess, M

Hofmann, W

Lampeitl, H

Puhlhofer, G

Aharonian, F

Akhperjanian, AG

Barrio, JA

Beglarian, AS

Bernlohr, 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

Kohler, C

Konopelko, A

Kranich, D

Krawczynski, H

Kornmayer, H

Lindner, A

Lorenz, E

Magnussen, N

Meyer, H

Mirzoyan, R

Moller, H

Moralejo, A

Padilla, L

Panter, M

Petry, D

Plaga, R

Prahl, J

Prosch, C

Rauterberg, G

Rhode, W

Rohring, A

机构：

[1] Max Planck Inst Kernphys, D-69029 Heidelberg, Germany

[2] Yerevan Phys Inst, Yerevan 375036, Armenia

[3] Max Planck Inst Phys, D-80805 Munich, Germany

[4] Univ Complutense Madrid, Fac Ciencias Fis, E-28040 Madrid, Spain

[5] Univ Kiel, Inst Kernphys, D-24118 Kiel, Germany

[6] BUGH Wuppertal, D-42119 Wuppertal, Germany

[7] Univ Hamburg, Inst Expt Phys 2, D-22761 Hamburg, Germany

来源：

ASTROPARTICLE PHYSICS | 1997年 / 8卷 / 1-2期

关键词：

HEGRA IACT array; Crab Nebula; air showers;

D O I：

10.1016/S0927-6505(97)00031-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 gamma-ray energy threshold around 0.5 TeV. The Crab signal demonstrates an angular resolution of about 0.1 degrees. Shape cuts allow to suppress cosmic ray background by almost a factor 100, while maintaining 40% efficiency for gamma-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. (C) 1997 Elsevier Science B.V.

引用

页码：1 / 11

页数：11

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