Continuing analysis of underground muons from the direction of Cygnus X-3

K. Johns, M. L. Marshak, E. A. Peterson, K. Ruddick, M. Shupe, D. S. Ayres, T. H. Fields, E. N. May, L. E. Price

Research output: Contribution to journalArticlepeer-review


We report on 3.2 years live time of underground muon observations taken between 1981 and 1989 using the Soudan 1 proportional tube detector, located at a depth of 1,800 m water equivalent. The post-1984 observations are consistent with earlier published data on an excess signal apparently correlated with the Cygnus X-3 orbital period. The signal-to-background ratio in the entire data sample is 1 to 3 percent, depending on phase width. These data are not contradicted by other measurements. However, a larger detector will be required to establish a signal, if one exists, at a high level of certainty.

Original languageEnglish (US)
Pages (from-to)220-225
Number of pages6
JournalNuclear Physics B (Proceedings Supplements)
Issue number1
StatePublished - Mar 1990

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics


Dive into the research topics of 'Continuing analysis of underground muons from the direction of Cygnus X-3'. Together they form a unique fingerprint.

Cite this