Searches for ultra-high-energy gamma rays from SN 1987A and centaurus X-3

H. Yoshii, T. Baba, T. Kaneko, K. Suga, F. Kakimoto, S. Ogio, Y. Shirasaki, N. Gironda, M. Tesihma, Y. Toyoda, K. Murakami, Y. Matsubara, Y. Mizumoto, M. Matsuoka, K. Nishi, N. Tajima, S. Shimoda, H. Nakatani, Y. Yamada, E. GotohA. Veralde, L. Siles, P. Miranda, W. Velasquez, I. Poma

Research output: Contribution to journalArticlepeer-review

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Abstract

Searches for gamma rays above 100 TeV from SN 1987A and above 50 TeV from Cen X-3 were carried out with an air shower array at Mount Chacaltaya over a period of 3 years. The array, which consists of 13 4 m2 and 28 1 m2 scintillation detectors, was located on a slope of about 30° facing southward to effectively observe air showers coming from the directions of these sources. In the analysis, a selection by shower age parameter was applied to reduce the background due to showers initiated by protons or nuclei. No significant excess of gamma rays (and/or neutral particles) from these sources was found; our upper limits on the flux of gamma rays above 100 TeV from SN 1987A and above 50 TeV from Cen X-3 are 2.2 × 10-13 and 3.5 × 10-13 photons cm-2 s-1 (95% confidence level), respectively.

Original languageEnglish
Pages (from-to)800-805
Number of pages6
JournalAstrophysical Journal
Volume472
Issue number2 PART I
DOIs
StatePublished - 1996

Keywords

  • Gamma rays: observations
  • Stars: individual (Centaurus X-3)
  • Supernovae: Individual(SN 1987A)

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