eprintid: 14944
rev_number: 20
eprint_status: archive
userid: 562
dir: disk0/00/01/49/44
datestamp: 2013-05-31 05:38:04
lastmod: 2015-02-03 12:00:06
status_changed: 2013-05-31 08:49:12
type: doctoralThesis
metadata_visibility: show
creators_name: Lu, Chia-Chun
title: An advanced direction reconstruction technique and
application to the observation with H.E.S.S.
subjects: 520
divisions: 130001
divisions: 851340
adv_faculty: af-13
abstract: The High Energy Stereoscopic system (H.E.S.S.) is an array of five imaging atmospheric Cerenkov telescopes which aims at exploring the high energy non-thermal processes in the universe via detecting very high-energy (VHE) gamma rays. In this work, an advanced direction reconstruction
algorithm which yields better point spread function (PSF)
and sensitivity is developed to cope with the complex morphology analysis in the Large Magellanic Cloud (LMC) region. LMC is a satellite galaxy of Milky Way at the distance of 48 kpc. The relatively short distance makes it a good extra-galactic laboratory for astronomical observation. The H.E.S.S. observation focuses on the
three targets hosted in this region: the young supernova remnant SN1987a, the pulsar wind nebula N 157B, and the superbubble 30Dor C. The VHE flux of SN 1987a is predicted at the detectable level for H.E.S.S. but no significant detection is found in the current dataset.
An upper limit on the gamma-ray flux is derived for this target. The pulsar wind nebular N 157B is detected, and the spectrum and other physical quantities are derived. The 
gamma-ray flux shows that it is the most-energetic-ever observed pulsar wind nebula. At the vicinity of
N 157B, we find extra gamma-ray excess towards the direction of 30Dor C. The existance of this source is established by detailed morphology studies and its connection to 30Dor C is discussed.
date: 2013
id_scheme: DOI
id_number: 10.11588/heidok.00014944
ppn_swb: 817543856
own_urn: urn:nbn:de:bsz:16-heidok-149447
date_accepted: 2013-04-17
advisor: HASH(0x556120d83cf0)
language: eng
bibsort: LUCHIACHUNANADVANCED2013
full_text_status: public
citation:   Lu, Chia-Chun  (2013) An advanced direction reconstruction technique and application to the observation with H.E.S.S.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/14944/3/thesis_Chia-Chun_Lu_final.pdf