ITA
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FIRST RESULTS ON THE PERFORMANCE OF THE HEGRA IACT ARRAY

Authors

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 SAHAKIAN V SAMORSKI M SANCHEZ JA SCHMELE D STAMM W ULRICH M VOLK HJ WESTERHOFF S WIEBELSOOTH B WIEDNER CA WILLMER M WIRTH H

Citation

A. Daum et al., FIRST RESULTS ON THE PERFORMANCE OF THE HEGRA IACT ARRAY, Astroparticle physics, 8(1-2), 1997, pp. 1-11

Citations number

Journal title

Astroparticle physics → ACNP

ISSN journal

09276505

Volume

Issue

1-2

Year of publication

1997

Pages

1 - 11

Database

ISI

SICI code

0927-6505(1997)8:1-2<1:FROTPO>2.0.ZU;2-K

Abstract

First results concerning the performance characteristics of the HEGRA IACT array are given based on stereoscopic observations of the Crab Ne bula with four telescopes. The system provides a gamma-ray energy thre shold around 0.5 TeV. The Crab signal demonstrates an angular resoluti on of about 0.1 degrees. Shape cuts allow to suppress cosmic ray backg round by almost a factor 100, while maintaining 40% efficiency for gam ma-rays. The Crab signal is essentially background free. For longer ob servation times of order 100 h, the system in its present form provide s sensitivity to point sources at a level of 3% of the Crab flux. Perf ormance is expected to improve further with the inclusion of the fifth telescope and the implementation of advanced algorithms for shower re construction. (C) 1997 Elsevier Science B.V.