Upper limits on TeV gamma-ray emission from centaurus A, vela X-1, centaurus X-3, and circinus X-1

W. H. Allen*, I. A. Bond, E. Budding, M. J. Conway, A. Daniel, K. B. Fenton, H. Fujii, Z. Fujii, N. Hayashida, K. Hibino, M. Honda, J. E. Humble, S. Kabe, K. Kasahara, T. Kifune, G. D. Lythe, A. Masaike, Y. Matsubara, K. Mitsui, Y. MiuraM. Mori, Y. Muraki, M. Nagano, T. Nakamura, M. Nishizawa, P. M. Norris, S. Ogio, T. O. Saito, M. Sakata, H. Sato, H. M. Shimizu, M. Spencer, J. R. Storey, T. Tanimori, M. Teshima, Shoji Torii, A. Wadsworth, Y. Watase, M. D. Woodhams, Y. Yamamoto, P. C M Yock, T. Yuda

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


The active galaxy Centaurus A and the X-ray binary systems Vela X-1, Centaurus X-3, and Circinus X-1 were monitored for VHE gamma-ray emission above 1 TeV with the JANZOS Cerenkov facility during 1988 and 1989. No evidence was found for persistent or episodic emission from any of these objects. Subseqeunt upper limits on the integral fluxes of 2.2 × 10-11, 2.8 × 10-11, 4.0 × 10-11, and 4.2 × 10-11 cm-2 s-1, respectively, were obtained for these objects. These limits are consistent with results of observations made by other groups.

Original languageEnglish
Pages (from-to)554-558
Number of pages5
JournalAstrophysical Journal
Issue number2
Publication statusPublished - 1993 Mar 10
Externally publishedYes


  • Galaxies: individual (Centaurus A)
  • Gamma rays: observations
  • Stars: individual (Vela X-1, Centaurus X-3, Circinus X-1)
  • X-rays: galaxies
  • X-rays: stars

ASJC Scopus subject areas

  • Space and Planetary Science


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