ASKAP-EMU Discovery of “Raspberry”: A New Galactic SNR Candidate G308.73+1.38
Sanja Lazarević, M. D. Filipović, B. Koribalski, Zachary J. Smeaton, Andrew Hopkins, R. Z. E. Alsaberi, Velibor Velović, B. Ball, R. Kothes, D. A. Leahy, A. Ingallinera
Abstract
Abstract We report the Australian Square Kilometre Array Pathfinder discovery of a new Galactic supernova remnant (SNR) candidate G308.73+1.38, which we name Raspberry. This new SNR candidate has an angular size of 20.′7 × 16.′7, and we measure a total integrated flux of 407 ± 50 mJy. We estimate Raspberry’s most likely diameter of 10–30 pc which would place it at a distance 3–5 kpc, in the near side of the Milky Way’s Scutum–Centaurus Arm. We also find a Stokes- V point source close to the center of Raspberry with a ∼5 σ significance. This point source may be the remaining compact source, a neutron star, or possibly a pulsar, formed during the initial supernova event.