Study of underground muons during the January 1991 radio flare of Cygnus X-3.

Abstract

Muons recorded by the IMB proton decay detector during the radio outburst from Cygnus X-3 in January 1991 are studied. Data are examined for both aperiodic excesses and those phase modulated at the x-ray period of Cygnus X-3. No correlation between the muon data and Cygnus X-3 is found. Further, this observation provides flux limits of ${\ensuremath{\Phi}}_{90% \mathrm{C}.\mathrm{L}.}\ensuremath{\le}2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}10}$ \ensuremath{\mu}${\mathrm{cm}}^{\ensuremath{-}2}$${\mathrm{s}}^{\ensuremath{-}1}$ at 1570 meters of water equivalent on the 20th and 23rd, in contrast with other reported signals.