Muons from gamma-rays of Markarian 501

The muon flux expected to be detected on Earth from the radio loud Active G alactic Nuclei Markarian 501 during its high state as happened in the first half of 1997 has been calculated in the present work. The analytical estim ate of the muon spectrum is made using the standard cascade equation for mu ons and latest photopion production cross section obtained from the fit to the DESY ep collider experiment. The integral muon energy spectrum generate d by the photoproduced pions, from the direct production of muon pairs and photoproduced charm particle decay have been calculated separately. In this work we have included muon production both from the direct charm decays as well as the charm decays through D-meson decays. The Monte Carlo parametri sation of muon flux from photopions is also used to estimate the photoprodu ced muon flux from this object. We have also discussed about the possibilit y of detection of muon events from Mrk 501 by a large area muon detector at the South Pole location with its angular resolution and cosmic ray generat ed muon background. (C) 2001 Elsevier Science B.V. All rights reserved.