Cover Image

HEGRA search for TeV emission from BL Lacertae objects

The HEGRA system of four Imaging Atmospheric Cherenkov Telescopes (IACTs) has been used to extensively observe extragalactic objects. In this paper we describe the search for TeV emission from nine very promising potential TeV sources, namely eight ``high frequency'' BL Lac objects (HBLs),...

Full description

Saved in:
Bibliographic Details
Main Authors: Aharonian, Felix A. (Author) , Akhperjanian, A. G. (Author) , Barrio, J. A. (Author) , Bernlöhr, Konrad (Author) , Bojahr, H. (Author) , Calle, I. (Author) , Contreras, J. L. (Author) , Cortina, J. (Author) , Daum, A. (Author) , Deckers, T. (Author) , Denninghoff, S. (Author) , Fonseca, V. (Author) , Gonzalez, J. C. (Author) , Heinzelmann, G. (Author) , Hemberger, M. (Author) , Hermann, G. (Author) , Heß, M. (Author) , Heusler, Andreas (Author) , Hofmann, Werner (Author) , Hohl, H. (Author) , Horns, D. (Author) , Ibarra, A. (Author) , Pühlhofer, Gerd (Author) , Völk, Heinrich J. (Author) , Wiebel-Sooth, B. (Author) , Wiedner, C. (Author) , Willmer, M. (Author) , Wittek, W. (Author)
Format: Article (Journal)
Language:English
Published: January 2000
In: Astronomy and astrophysics
Year: 2000, Volume: 353, Pages: 847-852
ISSN:1432-0746
Online Access:Verlag, lizenzpflichtig, Volltext: http://adsabs.harvard.edu/abs/2000A%26A...353..847A
Get full text
Author Notes:F. A. Aharonian, A. G. Akhperjanian, J. A. Barrio, K. Bernlöhr, H. Bojahr, I. Calle, J. L. Contreras, J. Cortina, A. Daum, T. Deckers, S. Denninghoff, V. Fonseca, J. C. Gonzalez, G. Heinzelmann, M. Hemberger, G. Hermann, M. Heß, A. Heusler, W. Hofmann, H. Hohl, D. Horns, A. Ibarra, R. Kankanyan, M. Kestel, J. Kettler, C. Köhler, A. Konopelko, H. Kornmeyer, D. Kranich, H. Krawczynski, H. Lampeitl, A. Lindner, E. Lorenz, N. Magnussen, O. Mang, H. Meyer, R. Mirzoyan, A. Moralejo, L. Padilla, M. Panter, D. Petry, R. Plaga, A. Plyasheshnikov, J. Prahl, G. Pühlhofer, G. Rauterberg, C. Renault, W. Rhode, A. Röhring, V. Sahakian, M. Samorski, D. Schmele, M. Schilling, F. Schröder, W. Stamm, H. J. Völk, B. Wiebel-Sooth, C. Wiedner, M. Willmer, W. Wittek
Description
Summary:The HEGRA system of four Imaging Atmospheric Cherenkov Telescopes (IACTs) has been used to extensively observe extragalactic objects. In this paper we describe the search for TeV emission from nine very promising potential TeV sources, namely eight ``high frequency'' BL Lac objects (HBLs), and the object ``BL Lacertae'' itself. These objects were observed during 1997 and 1998 seasons, with total integration times ranging between one and fifteen hours. No evidence for emission was found from any of these objects and the upper limits on the integral energy flux above ~ 750 GeV are on the level of a few times - 10-12 erg cm-2 s-1. For the two objects BL Lacertae and 1ES 2344+51.4, we discuss the astrophysical implications of the TeV flux upper limit, using also information from the X-ray and gamma -ray bands as measured with the All Sky Monitor (ASM) of RXTE (1.3-12.0 keV) and with EGRET (30 MeV - 20 GeV).
Item Description:Gesehen am 18.11.2020
Physical Description:Online Resource
ISSN:1432-0746

Similar Items