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@ARTICLE{Blank:570294,
author = {Blank, M. and Tluczykont, M. and Porelli, A. and Mirzoyan,
R. and Wischnewski, R. and Awad, A. K. and Brueckner, M.},
title = {{D}etection of the {C}rab {N}ebula using a {R}andom
{F}orest {A}nalysis of the first {TAIGA} {IACT} {D}ata},
reportid = {PUBDB-2023-00657, arXiv:2301.11002},
year = {2023},
note = {8 pages, 9 figures, accepted by MNRAS
10.1093/mnras/stad276},
abstract = {The Tunka Advanced Instrument for Gamma- and cosmic-ray
Astronomy (TAIGA) is a multicomponent experiment for the
measurement of TeV to PeV gamma- and cosmic rays. Our goal
is to establish a novel hybrid direct air shower technique,
sufficient to access the energy domain of the long-sought
Pevatrons. The hybrid air Cherenkov light detection
technique combines the strengths of the HiSCORE shower front
sampling array, and two $\thicksim$4 m class, $\sim$9.6 deg
field of view Imaging Air Cherenkov Telescopes (IACTs). The
HiSCORE array provides good angular and shower core position
resolution, while the IACTs provide the image shape and
orientation for gamma-hadron separation. In future, an
additional muon detector will be used for hadron tagging at
$\ge$ 100 TeV energies. Here, only data from the first IACT
of the TAIGA experiment are used. A random forest algorithm
was trained using Monte Carlo (MC) simulations and real
data, and applied to 85 h of selected observational data
tracking the Crab Nebula at a mean zenith angle of 33.5 deg,
resulting in a threshold energy of 6 TeV for this dataset.
The analysis was performed using the gammapy package. A
total of 163.5 excess events were detected, with a
statistical significance of 8.5 sigma. The observed spectrum
of the Crab Nebula is best fit with a power law above 6 TeV
with a flux normalisation of $(3.20\pm0.42)\cdot10^{-10}
TeV^{-1} cm^{-2} s^{-1})$ at a reference energy of 13 TeV
and a spectral index of $-2.74\pm0.16$.},
keywords = {radiation, Cherenkov (INSPIRE) / energy, threshold
(INSPIRE) / showers, atmosphere (INSPIRE) / muon, detector
(INSPIRE) / TeV (INSPIRE) / air (INSPIRE) / cosmic radiation
(INSPIRE) / hybrid (INSPIRE) / power spectrum (INSPIRE) /
Monte Carlo (INSPIRE) / Cherenkov counter (INSPIRE) / flux
(INSPIRE) / spatial resolution (INSPIRE) / imaging (INSPIRE)
/ statistical (INSPIRE) / hadron (INSPIRE)},
cin = {$Z_GA$},
ddc = {520},
cid = {$I:(DE-H253)Z_GA-20210408$},
pnm = {613 - Matter and Radiation from the Universe (POF4-613)},
pid = {G:(DE-HGF)POF4-613},
experiment = {EXP:(DE-H253)TAIGA-20190101},
typ = {PUB:(DE-HGF)25},
eprint = {2301.11002},
howpublished = {arXiv:2301.11002},
archivePrefix = {arXiv},
SLACcitation = {$\%\%CITATION$ = $arXiv:2301.11002;\%\%$},
url = {https://bib-pubdb1.desy.de/record/570294},
}