New candidate radio supernova remnants detected in the GLEAM survey over $345^circ < l < 60^circ$, $180^circ < l < 240^circ$. (arXiv:1911.08126v1 [astro-ph.HE]) <a href="http://arxiv.org/find/astro-ph/1/au:+Hurley_Walker_N/0/1/0/all/0/1">Natasha Hurley-Walker</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Filipovic_M/0/1/0/all/0/1">Miroslav D. Filipovic</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gaensler_B/0/1/0/all/0/1">Bryan M. Gaensler</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Leahy_D/0/1/0/all/0/1">Denis A. Leahy</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hancock_P/0/1/0/all/0/1">Paul J. Hancock</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Franzen_T/0/1/0/all/0/1">Thomas M. O. Franzen</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Offringa_A/0/1/0/all/0/1">Andre R. Offringa</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Callingham_J/0/1/0/all/0/1">Joseph R. Callingham</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hindson_L/0/1/0/all/0/1">Luke Hindson</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wu_C/0/1/0/all/0/1">Chen Wu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bell_M/0/1/0/all/0/1">Martin E. Bell</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+For_B/0/1/0/all/0/1">Bi-Qing For</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Johnston_Hollitt_M/0/1/0/all/0/1">Melanie Johnston-Hollitt</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kapinska_A/0/1/0/all/0/1">Anna D. Kapinska</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Morgan_J/0/1/0/all/0/1">John Morgan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Murphy_T/0/1/0/all/0/1">Tara Murphy</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+McKinley_B/0/1/0/all/0/1">Benjamin McKinley</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Procopio_P/0/1/0/all/0/1">Pietro Procopio</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Staveley_Smith_L/0/1/0/all/0/1">Lister Staveley-Smith</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wayth_R/0/1/0/all/0/1">Randall B. Wayth</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zheng_C/0/1/0/all/0/1">Cathie Q. Zheng</a>

We have detected 27 new supernova remnants (SNRs) using a new data release of
the GLEAM survey from the Murchison Widefield Array (MWA) telescope, including
the lowest surface-brightness SNR ever detected, G0.1-9.7. Our method uses
spectral fitting to the radio continuum to derive spectral indices for 26/27
candidates, and our low-frequency observations probe a steeper-spectrum
population than previously discovered. None of the candidates have coincident
Wide-field Infrared Survey Explorer mid-IR emission, further showing that the
emission is non-thermal. Using pulsar associations we derive physical
properties for six candidate SNRs, finding G0.1-9.7 may be younger than 10kyr.
60% of the candidates subtend areas larger than 0.2deg$^{2}$ on the sky,
compared to $<25$% of previously-detected SNRs. We also make the first detection of two SNRs in the Galactic longitude range $220^circ-240^circ$.

We have detected 27 new supernova remnants (SNRs) using a new data release of
the GLEAM survey from the Murchison Widefield Array (MWA) telescope, including
the lowest surface-brightness SNR ever detected, G0.1-9.7. Our method uses
spectral fitting to the radio continuum to derive spectral indices for 26/27
candidates, and our low-frequency observations probe a steeper-spectrum
population than previously discovered. None of the candidates have coincident
Wide-field Infrared Survey Explorer mid-IR emission, further showing that the
emission is non-thermal. Using pulsar associations we derive physical
properties for six candidate SNRs, finding G0.1-9.7 may be younger than 10kyr.
60% of the candidates subtend areas larger than 0.2deg$^{2}$ on the sky,
compared to $<25$% of previously-detected SNRs. We also make the first
detection of two SNRs in the Galactic longitude range $220^circ-240^circ$.

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