Wide field-of-view Cherenkov telescope for the detection of cosmic rays   in coincidence with the Yakutsk extensive air shower array
  The Yakutsk array group is developing a wide field-of-view Cherenkov telescope to be operated in coincidence with the surface detectors of the extensive air shower array. Currently, the engineering prototype of the reflecting telescope with the front-end electronics is designed, assembled, and tested to demonstrate the feasibility of the conceived instrument. The status and specifications of the prototype telescope are presented, as well as the modernization program of the already existing Cherenkov light detectors subset of the array measuring ultra-high energy cosmic rays. 
A.A. Ivanov, S.P. Knurenko, A.D. Krasilnikov, Z.E. Petrov, M.I.   Pravdin, I.Ye. Sleptsov, L.V. Timofeev
astro-ph.IM