Abstract Details

Name: MANAS PRATIM DAS
Affiliation: BHABHA ATOMIC RESEARCH CENTRE
Conference ID: ASI2021_350
Title : Simulation studies of TACTIC for sensetivity optimisation
Authors and Co-Authors : Manas Pratim Das(BARC),C.R.Borwankar(BARC),V.K.Dhar(BARC),K.K.Yadav(BARC),Pradeep Chandra(BARC),Nilay Bhatt(BARC)
Abstract Type : Poster
Abstract Category : Instrumentation and Techniques
Abstract : The main challenge with Imaging Atmospheric Cherenkov Telescope(IACT) is to retrieve gamma ray signal from a huge background of cosmic rays,which is ∼1000 times more abundant than gamma ray.This huge background of cosmic ray events can be reduced significantly by using characteristics features of images of their air showers.The process of shower development & image formation can be studied using Monte Carlo simulation. For this,we have generated ~ 20 millions of air showers initiated by gamma and hadrons for TACTIC(Mt Abu,Rajasthan) in energy range (600GeV-20TeV) using CORSIKA package.Primarily,the gamma & cosmic ray segregation is made using moment analysis of images in terms of Hillas parameters. Secondly,Radial Basis Function(RBF) technique was applied on the Hillas parameter distributions and hence better gamma-hadron separation was obtained.We also employed the 4th moment(Kurtosis) distribution for the generated shower images,which suppressed the background even further.By application of the above mentioned tools altogether better signal sensitivity was achieved compared to conventional method. The results obtained with observed data will be discussed in this meeting.