Andrew Flinders Thesis Defense 10/27/16

Thesis Defense

Andrew Flinders

Thursday, October 27, 2016
11:00AM (206 JFB)

Title: A Detection Of Significant Gamma-Ray Emission From The Pulsar Wind Nebula Geminga With Veritas

VERITAS is an array of four Imaging Air Cherenkov Telescopes (IACTs) located in southern Arizona. This telescope array system has been used to observe very high energy (VHE) gamma-rays from a variety of sources including pulsars, pulsar wind nebulae, active galactic nuclei, and high mass x-ray binary systems. For sources which exhibit a small angular size on the sky (< 1 ◦ ) standard analysis procedures have been well established and widely accepted. These standard analysis are unsuitable for sources with a larger angular extent. In this thesis, I will describe the development of an improved analysis technique for IACT data called the matched runs method, which builds from the On Off method used by previous VHE experiments. Data taken with the VERITAS array in 2010 on the Geminga pulsar was analyzed using the matched runs method and an angularly extended (∼ 3 ◦ ) region of significant emission (∼ 5 σ) is detected that is coincident with the Milagro reported excess of the same region.

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