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@ARTICLE{BurgerScheidlin:598360,
author = {Burger-Scheidlin, Christopher and Brose, Robert and Mackey,
Jonathan and Filipovic, Miroslav D. and Goswami, Pranjupriya
and Guillen, Enrique Mestre and de Oña Wilhelmi, Emma and
Sushch, Iurii},
title = {{G}amma-ray detection of newly discovered {A}ncora {SNR}:
{G}288.8-6.3},
reportid = {PUBDB-2023-06788, arXiv:2310.14431},
year = {2023},
note = {11 pages, 6 figures},
abstract = {The supernova remnant (SNR) G288.8-6.3 was recently
discovered as a faint radio shell at large Galactic latitude
using observations with ASKAP in the EMU survey. Here, we
make the first detailed investigation of the $\gamma$-ray
emission from the G288.8-6.3 region, aiming to characterise
the high-energy emission in the GeV regime from the newly
discovered SNR, dubbed Ancora. 15 years of Fermi-Large Area
Telescope (LAT) data were analysed at energies between 400
MeV and 1 TeV and the excess seen in the region was modelled
using different spatial and spectral models. We detect
spatially extended $\gamma$-ray emission coinciding with the
radio SNR, with detection significance up to 8.8 $\sigma$. A
radial disk spatial model in combination with a power-law
spectral model with an energy flux of $(4.80 \pm 0.91)
\times 10^{-6}$$\text{MeV}$$\text{cm}^{-2}$$\text{s}^{-1}$,
with the spectrum extending up to around 5 GeV was found to
be the preferred model. Morphologically, hotspots seen above
1 GeV are well-correlated with the bright western part of
the radio shell. The emission is more likely to be of
leptonic origin given the estimated gas density in the
region and the estimated distance and age of the SNR, but a
hadronic scenario cannot be ruled out. Ancora is the eighth
SNR detected at high Galactic latitude with Fermi-LAT. This
new population of remnants has the potential to constrain
the physics of particle diffusion and escape from SNRs into
the Galaxy.},
cin = {$Z_THAT$ / ZEU-HESS},
cid = {$I:(DE-H253)Z_THAT-20210408$ /
I:(DE-H253)ZEU-HESS-20140213},
pnm = {613 - Matter and Radiation from the Universe (POF4-613)},
pid = {G:(DE-HGF)POF4-613},
experiment = {EXP:(DE-MLZ)NOSPEC-20140101},
typ = {PUB:(DE-HGF)25},
eprint = {2310.14431},
howpublished = {arXiv:2310.14431},
archivePrefix = {arXiv},
SLACcitation = {$\%\%CITATION$ = $arXiv:2310.14431;\%\%$},
url = {https://bib-pubdb1.desy.de/record/598360},
}