"PRELIMINARY STUDIES OF BACKGROUND REJECTION CAPABILITIES FOR THE SOUTH" by Sonali Mohan

Date of Award

2022

Document Type

Open Access Master's Report

Degree Name

Master of Science in Physics (MS)

Administrative Home Department

Department of Physics

Advisor 1

Petra Huentemeyer

Committee Member 1

David Nitz

Committee Member 2

Brian Fick

Committee Member 3

Ravindra Pandey

Abstract

The Southern Wide-field Gamma-ray Observatory (SWGO), is a next-generation
gamma-ray observatory to be constructed in the Southern Hemisphere that will com-
plement current and future instruments by providing a wide-field coverage of a large
portion of the southern sky and a better sensitivity to the 100 GeVs to few PeVs
photon band to understand extreme astrophysical phenomena throughout the uni-
verse. Air shower events initiated by gamma rays will be recorded by the detector
and reconstructed to extract shower properties. The challenge for air-shower arrays
in the observation of gamma-ray sources is the large background of hadronic cos-
mic rays. Thus, the identification and separation of this background is critical. In
this report, I present a performance study of gamma-hadron separation parameters
for the SWGO observatory using simulation data a study with a specific parameters
that measures the smoothness of the footprint in the detector array was conducted
and results achieved with a SWGO reference configuration were compared to results
confirmed with the High-Altitude Water Cherenkov(HAWC) Observatory.

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