Abstract Details

Conference ID: ASI2017_675
Title : Performance of the MACE gamma ray telescope in low zenith angle (5 - 25 degree) range
Authors and Co-Authors : Chinmay B. (APSD, BARC, Mumbai) N. G. Bhatt, (APSD, BARC, Mumbai) Subir B., (APSD, BARC, Mumbai) S. Bose, (ISI, Kolkata) R. Koul**, (APSD, BARC, Mumbai) A. K. Tickoo (APSD, BARC, Mumbai) R. C. Rannot (APSD, BARC, Mumbai) ** = Superannuated APSD, BARC= Astrophysical Sciences Division, Bhabha Atomic Research Centre ISI, Kolkata = Indian Statistical Institute
Abstract Type : Poster
Abstract Category : Instrumentation and Techniques
Abstract : The MACE (Major Atmospheric Cherenkov Experiment) is a 21 m diameter gamma-ray telescope which is at an advance stage of installation at Hanle in Ladakh, India (32^0 46^' 46^" N, 78^0 58^' 35^" E) at an altitude of 4270 m a.s.l. In this work, we present a detailed study to estimate the sensitivity of the MACE telescope by using a substantially large Monte Carlo simulation database (more than 1 billion extensive air showers) in the low zenith angle (5^0 - 25^0) range. The sensitivity is estimated by carrying out the gamma-hadron segregation using the Random Forest method. It is estimated that the MACE telescope will have an analysis energy threshold of 38 GeV for image intensities above 50 photoelectrons at 5^0 zenith angle. The integral sensitivity for point like sources with Crab Nebula-like spectrum above 38 GeV is ~2.7% of Crab Nebula flux at 5 sigma statistical significance level in 50 hrs of observation. The analysis energy threshold of MACE increases to ~44 GeV at 25^0 zenith angle and the integral sensitivity above 44 GeV is ~2.2% of Crab Nebula flux in 50 hrs of observation.