Detection of Multi‐TeV Emission from Markarian 421
The Astrophysical Journal1997Vol. 481(2), pp. 758–763
Citations Over TimeTop 10% of 1997 papers
F. Krennrich, C. Akerlof, J. H. Buckley, A. M. Burdett, D. A. Carter‐Lewis, M. F. Cawley, M. Catanese, V. Connaughton, D. J. Fegan, J. P. Finley, J. A. Gaidos, R. C. Lamb, R. W. Lessard, J. E. McEnery, G. Mohanty, J. Quinn, A. J. Rodgers, H. J. Rose, M. Schubnell, G. H. Sembroski, T. C. Weekes, C. Wilson, J. Zweerink
Abstract
Gamma rays with energies exceeding 5 ± 1.5 TeV have been detected from Markarian 421 using the Whipple Observatory's 10 m γ-ray telescope. These observations employ a new technique: the so-called large zenith-angle technique. Because they are taken at large zenith angles, the observations yield high statistics data on the multi-TeV part of the spectrum and are well suited for examining the question of a possible energy cutoff. Observations taken during high states on 1995 June 20, 21, and 28 show no evidence for a spectral break. These results conflict with a previous interpretation of the Markarian 421 energy spectrum in which a cutoff due to γ-ray absorption in extragalactic space was postulated.
Related Papers
- Susquehanna Chorale Spring Concert "Roots and Wings"(2017)
- IDENTIFIKASI MODE RUSAK JAMAK (MULTI-FAULTS) BANTALAN MENGGUNAKAN ANALISIS ENVELOPE PADA TURBIN ANGIN Horizontal Axis(2018)
- EVALUASI PERLAKUAN AKUNTANSI HARGA POKOK PRODUK RUSAK PADA PT. MULIAPRIMA REPLICATAMA SEMARANG(2000)
- ANALISIS PERLAKUAN AKUNTANSI PRODUK RUSAK PADA PT. AJINOMOTO INDONESIA MOJOKERTO FACTORY(2017)
- Perbedaan Kinerja Karyawan Sebelum dan Sesudah Penerapan Uraian Pekerjaan(2001)