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The supernova remnant (SNR) G150.3+4.5 was first identified in radio, exhibiting a hard GeV spectrum and a $\sim 1.5^\circ$ radius. Radio observations revealed a bright arc with an index of $\sim -0.40$, which stands in contrast to the…

High Energy Astrophysical Phenomena · Physics 2024-08-20 Yuan Li , Siming Liu , Gwenael Giacinti

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…

We discovered a middle-aged supernova remnant (SNR) in the vicinity of G69.7+1.0 using the ASCA satellite. G69.7+1.0 was identified in the 2.7 GHz survey and classified as a shell-type SNR with a diameter of 16 arcmin. During the ROSAT…

Astrophysics · Physics 2015-06-24 Kumi Yoshita , Emi Miyata , Hiroshi Tsunemi

Large-scale radio continuum surveys have good potential for discovering new Galactic supernova remnants (SNRs). Surveys of the Galactic plane are often limited in the Galactic latitude of |b| ~ 5 degree. SNRs at high latitudes, such as the…

Astrophysics of Galaxies · Physics 2014-09-05 X. Y. Gao , J. L. Han

G279.0+1.1 is a supernova remnant (SNR) with poorly known parameters, first detected as a dim radio source and classified as an evolved system. An analysis of data from the Fermi-LAT revealing for the first time an extended source of gamma…

High Energy Astrophysical Phenomena · Physics 2020-02-05 Miguel Araya

Supernova remnant (SNR) detection along the Galactic plane poses a number of challenges. The SNR G309.8+00.0 lies exactly on the Galactic plane, with its center coinciding with galactic latitude (b)=0 deg. In this paper we report the first…

High Energy Astrophysical Phenomena · Physics 2024-10-01 Miltiadis Michailidis , Gerd Pühlhofer , Andrea Santangelo , Manami Sasaki , Werner Becker

Gamma-ray emission provides constraints on the non-thermal radiation processes at play in astrophysical particle accelerators. This allows both the nature of accelerated particles and the maximum energy that they can reach to be determined.…

High Energy Astrophysical Phenomena · Physics 2023-11-06 Pauline Chambery , Marianne Lemoine-Goumard , Armelle Jardin-Blicq , Atreyee Sinha , J. Eagle

The discovery of a non-thermal radio ring of low surface brightness about one degree in diameter has been recently reported around the location in the sky of the Calvera pulsar, at a high Galactic latitude. The radio properties point to it…

High Energy Astrophysical Phenomena · Physics 2022-11-30 Miguel Araya

The shell-type supernova remnant (SNR) G206.7+5.9 was recently discovered in the radio band with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The remnant spans about 3.5 in diameter and exhibits bilateral shells. In…

High Energy Astrophysical Phenomena · Physics 2025-01-29 Hicran Bakis , Ebru Aktekin , Volkan Bakis , Hidetoshi Sano , Aytap Sezer

Recently the Galactic and Extra-galactic All-sky Murchison Widefield Array survey has published 27 new candidate radio supernova remnants (SNRs) which are located within the longitude ranges of 345{\deg} < l < 60{\deg} and 180{\deg} < l <…

High Energy Astrophysical Phenomena · Physics 2023-05-02 B. M. Mese , T. Ergin

A thorough inspection of known Galactic Supernova Remnants (SNRs) along the Galactic plane with SRG/eROSITA yielded the detection of the X-ray counterpart of the SNR G279.0+01.1. The SNR is located just 1.5 deg above the Galactic plane. Its…

High Energy Astrophysical Phenomena · Physics 2024-05-03 Miltiadis Michailidis , Gerd Pühlhofer , Andrea Santangelo , Werner Becker , Manami Sasaki

A novel $\gamma$-ray supernova remnant (SNR) G206.9+2.3 is first reported in this study. We arrived at this conclusion after analyzing 12.4 years of observation data of the Fermi Large Area Telescope (Fermi-LAT). The photon flux of the…

High Energy Astrophysical Phenomena · Physics 2021-05-21 Yunchuan Xiang , Zejun Jiang

Context. While searching the NRAO VLA Sky Survey (NVSS) for diffuse radio emission, we have serendipitously discovered extended radio emission close to the Galactic plane. The radio morphology suggests the presence of a previously unknown…

High Energy Astrophysical Phenomena · Physics 2014-09-05 F. de Gasperin , C. Evoli , M. Bruggen , A. Hektor , M. Cardillo , P. Thorman , W. A. Dawson , C. B. Morrison

This work reports on the detection of $\gamma$-ray emission coincident with the supernova remnant (SNR) SNR G5.7-0.1 using data collected by the Large Area Telescope aboard the Fermi Gamma-ray Space Telescope. The SNR is believed to be…

High Energy Astrophysical Phenomena · Physics 2016-01-13 Timothy Joubert , Daniel Castro , Patrick Slane , Joseph Gelfand

We present the first detailed study on the Galactic supernova remnant (SNR) G46.8-0.3 and its environment since its discovery more than 50 years ago. With new flux measurements from radio surveys plus a compilation from the literature we…

High Energy Astrophysical Phenomena · Physics 2022-08-17 L. Supan , G. Fischetto , G. Castelletti

In this paper, we report the first extended GeV $\gamma$-ray emission, at a significant level of $\sim$ 8.13$\sigma$, from the region of the supernova remnant (SNR) SNR G317.3-0.2 by analyzing $\sim$ 12.2 years of Fermi Large Area Telescope…

High Energy Astrophysical Phenomena · Physics 2021-04-21 Yunchuan Xiang , Zejun Jiang , Yunyong Tang

The candidate supernova remnant (SNR) G118.4+37.0 (Calvera's SNR), discovered as a faint radio ring at high Galactic latitude and coincident with extended Fermi/LAT gamma-ray emission, is likely associated to the X-ray pulsar 1RXS…

High Energy Astrophysical Phenomena · Physics 2025-09-03 Emanuele Greco , Michela Rigoselli , Sandro Mereghetti , Fabrizio Bocchino , Marco Miceli , Vincenzo Sapienza , Salvatore Orlando

New images of the radio Supernova Remnant (SNR) G65.1+0.6 are presented, based on the 408 MHz and 1420 MHz continuum emission and the HI-line emission data of the Canadian Galactic Plane Survey (CGPS). A large shell-like structure seen in…

Astrophysics · Physics 2009-11-11 W. W. Tian , D. A. Leahy

We report the detection of high-energy $\gamma$-ray emission in the vicinity of G172.8+1.5, which is debated as a Supernova remnant (SNR) or an ionized hydrogen (H$_{\rm{II}}$) region. Using 16-yr Pass 8 data from Fermi Large Area Telescope…

High Energy Astrophysical Phenomena · Physics 2025-10-03 Yuan Li , Gwenael Giacinti , Siming Liu

We reanalyze the Fermi-LAT GeV $\gamma$-ray emission in the region of supernova remnant (SNR) G51.26+0.11 and investigate its interstellar molecular environment with the CO-line data. At GeV energies, based on 13.2 years of Fermi-LAT data,…

High Energy Astrophysical Phenomena · Physics 2023-03-08 Wen-Juan Zhong , Xiao Zhang , Yang Chen , Qian-Qian Zhang
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