4th quadrant Galactic SNRs (315°<l<360°)


G315.1+2.7

Radio: Poorly defined shell.
Optical: Filaments, brighter in NE.

References:

Last updated: 20 May 2014


G315.4−2.3

RCW 86, MSH 14−63

Notes: Possibly the remnant of the SN of AD185?

Radio: Shell, brightest to the SW.
Optical: Bright, radiative filaments, with some faint Balmer dominated filaments.
X-ray: Partial shell, with thermal and non-thermal emission.
Point sources: Several X-ray sources.
Distance: Optical observations imply 2.3 kpc.

References:

Last updated: 16 Jun 2017


G315.4−0.3

Radio: Irregular non-thermal emission, with HII region superposed in E.
Optical: Detected.

References:

Last updated: 25 Apr 2014


G315.9−0.0

Notes: Has been called G315.8−0.0.

Radio: Faint, distorted shell, with elongated trail to pulsar.
Point sources: Pulsar at end of radio trail.

References:

Last updated: 24 Apr 2014


G316.3−0.0

(MSH 14−57)

Radio: Distorted shell, with possible `blowout'.
X-ray: Detected.
Distance: HI absorption data suggests >7.2 kpc.

References:

Last updated: 13 May 2017


G317.3−0.2

Radio: Incomplete shell.
Optical: Detected.

References:

Last updated: 25 Apr 2014


G318.2+0.1

Radio: Faint shell, with central HII region.
X-ray: Sources within remnant.

References:

Last updated: 13 May 2017


G318.9+0.4

Notes: May not be a SNR?

Radio: Complex arcs, with off-centre core.

References:

Last updated: 13 Aug 1998


G320.4−1.2

MSH 15−52, RCW 89

Notes: Has been suggested as the remnant of the SN of AD185?

Radio: Ragged shell.
Optical: RCW 89 is the Hα emitting region to the NW.
X-ray: Partial shell, central nebula and pulsar and `jet'.
Point sources: Radio and X-ray pulsar, with wind nebula.
Distance: HI absorption indicates 5.2 kpc.

References:

Last updated: 5 May 2017


G320.6−1.6

Radio: Faint shell, overlapping G320.4−1.2 in W.
Optical: Detected.

References:

Last updated: 25 Apr 2014


G321.9−1.1

Radio: Faint shell.

References:

Last updated: 7 Jan 2004


G321.9−0.3

Radio: Shell brighter to the W, with Cir X-1 to N.
Point sources: Compact, probably thermal source at S edge.

References:

Last updated: 13 May 2017


G322.1+0.0

Radio: Circular shell, with extension to S.
X-ray: Diffuse emission.
Point sources: Cir X-1 HMXB at centre.

References:

Last updated: 30 Apr 2014


G322.5−0.1

Radio: Shell with central extended source.
Point sources: PN Pe 2-8 within boundary.

References:

Last updated: 13 Aug 1998


G323.5+0.1

Radio: Distorted shell, confused with thermal emission.
Point sources: Compact, probably thermal source near centre.

References:

Last updated: 16 Mar 2009


G326.3−1.8

MSH 15−56

Notes: Has been called G326.2−1.7.

Radio: Shell, with elongated, flat-spectrum core.
Optical: Emission around the shell.
X-ray: Shell, with central extended emission.
Point sources: Compact X-ray source.

References:

Last updated: 13 May 2017


G327.1−1.1

Radio: Shell, with off-centre core.
X-ray: Diffuse, with core.

References:

Last updated: 4 Jun 2017


G327.2−0.1

Notes: Has been called G327.24−0.13.

Radio: Shell, possibly with central emission.
Point sources: Central pulsar (magnetar).

References:

Last updated: 16 Mar 2009


G327.4+0.4

Kes 27

Notes: Has been called G327.3+0.4 and G327.3+0.5.

Radio: Incomplete, multi-arc shell, brightest to the SE.
X-ray: Diffuse, brighter in E.
Distance: HI absorption indicates 4.3 to 5.4 kpc.

References:

Last updated: 12 Jun 2017


G327.4+1.0

Radio: Asymmetric shell.

References:

Last updated: 10 Oct 2001


G327.6+14.6

SN1006, PKS 1459−41

Notes: This is the remnant of the SN of AD1006.

Radio: Shell, with two bright arcs.
Optical: Filaments to the NW, with broad Hα component.
X-ray: Thermal shell, with non-thermal limb-brightened arcs.
Point sources: The background Schweizer–Middleditch star is near the middle of the remnant.
Distance: Optical spectra and proper motion indicate 2.2 kpc.

References:

Last updated: 12 Jun 2017


G328.4+0.2

(MSH 15−57)

Radio: Amorphous emission, with central bar.
X-ray: Detected at high energies.
Distance: HI absorption indicates >17.4 kpc.

References:

Last updated: 27 Mar 2009


G329.7+0.4

Radio: Diffuse shell, in complex region.

References:

Last updated: 16 Mar 2009


G330.0+15.0

Lupus Loop

Radio: Low surface brightness loop with HI shell.
X-ray: Detected, with central source.
Point sources: Central, possibly pulsating, X-ray source.

References:

Last updated: 30 May 2014


G330.2+1.0

Radio: Clumpy non-thermal emission, possibly a distorted shell.
X-ray: Shell.
Point sources: Central compact X-ray source.
Distance: HI absorption indicates >4.9 kpc.

References:

Last updated: 5 May 2017


G332.0+0.2

Radio: Incomplete shell.

References:

Last updated: 13 May 2017


G332.4−0.4

RCW 103

Radio: Shell, brightest to the S.
Optical: Filaments correspond well to the radio shell, brightest in SE.
X-ray: Brightest to NW, with point source near centre.
Point sources: Central, variable X-ray source, and nearby pulsar.
Distance: HI absorption indicates 3.1 kpc.

References:

Last updated: 16 Jun 2017


G332.4+0.1

MSH 16−51, Kes 32

Notes: Has been called G332.4+0.2.

Radio: Distorted shell, with thermal jet and plume adjacent.
Optical: Detected.
X-ray: Shell, brightest to NW.
Point sources: Pulsar nearby.

References:

Last updated: 30 May 2014


G332.5−5.6

Radio: Bipolar shell, with central emission also.
Optical: Patchy filaments.
X-ray: Emission from centre.
Distance: Optical extinction suggests 3 kpc.

References:

Last updated: 11 May 2017


G335.2+0.1

Radio: Well defined shell.
Point sources: Old pulsar within remnant boundary.

References:

Last updated: 16 Mar 2009


G336.7+0.5

Radio: Irregular shell.
Optical: Detected.

References:

Last updated: 25 Apr 2014


G337.0−0.1

(CTB 33)

Notes: This entry refers to a small (1.'5) SNR, not the larger previously catalogued G337.0−0.1. Has mistakenly been called G337.7−0.1.

Radio: Shell, in a complex region.
Point sources: Associated with a soft gamma repeater.
Distance: Association with CTB 33 gives 11 kpc.

References:

Last updated: 23 May 2014


G337.2−0.7

Radio: Shell, brighter in S.
X-ray: Extended emission.
Distance: HI absorption suggests 2.0 to 9.3 kpc.

References:

Last updated: 13 May 2017


G337.2+0.1

Radio: Not well defined.
X-ray: Detected.
Distance: Association with HI hole gives 14 kpc.

References:

Last updated: 19 Feb 2009


G337.3+1.0

Kes 40

Radio: Nearly complete shell.

References:

Last updated: 13 Aug 1998


G337.8−0.1

Kes 41

Radio: Distorted shell.
X-ray: Centrally brightened.
Distance: HI absorption suggests 11 kpc.

References:

Last updated: 26 May 2017


G338.1+0.4

Radio: Arc in NE, merging with thermal emission in S.
Optical: Detected.

References:

Last updated: 28 Apr 2017


G338.3−0.0

Radio: Irregular shell, in complex region.
X-ray: Central X-ray source and nebula.
Point sources: Central pulsar.
Distance: HI observations suggest 8 to 13 kpc.

References:

Last updated: 12 Jun 2017


G338.5+0.1

Radio: Circle of non-thermal emission in complex region, not well defined.
Distance: HI absorption suggests 11 kpc.

References:

Last updated: 5 May 2017


G340.4+0.4

Radio: Distorted shell, elongated east–west.
Optical: Detected.

References:

Last updated: 25 Apr 2014


G340.6+0.3

Radio: Incomplete shell.
Optical: Possible associated filaments.
Distance: HI absorption suggests 15 kpc.

References:

Last updated: 22 Apr 2014


G341.2+0.9

Radio: Incomplete shell, with extension to SW.
Point sources: Pulsar in W, with wind nebula.

References:

Last updated: 8 Nov 2001


G341.9−0.3

Radio: Incomplete shell, brightest to NE.

References:

Last updated: 27 Jan 2004


G342.0−0.2

Radio: Distorted shell.

References:

Last updated: 1 Aug 2000


G342.1+0.9

Radio: Incomplete shell.

References:

Last updated: 13 Aug 1998


G343.0−6.0

RCW 114

Radio: Faint, poorly defined.
Optical: Filamentary shell.

References:

Last updated: 22 Apr 2014


G343.1−2.3

Radio: Incomplete shell?
X-ray: Pulsar wind nebula.
Point sources: Pulsar near edge, with wind nebula.

References:

Last updated: 22 Apr 2014


G343.1−0.7

Radio: Shell, with smaller thermal shell adjacent.

References:

Last updated: 1 Aug 2000


G344.7−0.1

Radio: Asymmetric shell, with possible core.
X-ray: Detected.
Distance: HI absorption and association with features suggests 6.3 kpc.

References:

Last updated: 23 May 2014


G345.7−0.2

Radio: Poorly defined diffuse shell.
Point sources: Old pulsar nearby.

References:

Last updated: 13 Aug 1998


G346.6−0.2

Radio: Irregular shell.
X-ray: Centrally brightened.

References:

Last updated: 11 May 2017


G347.3−0.5

RX J1713.7−3946

Radio: Faint emission.
X-ray: Non-thermal, limb-brightened to W, with central source.
Point sources: Central X-ray source.
Distance: Association with molecular clouds and X-ray observations imply 1.3 kpc.

References:

Last updated: 13 May 2017


G348.5−0.0

Radio: Arc, overlapping G348.5+0.1.

References:

Last updated: 5 May 2017


G348.5+0.1

CTB 37A

Radio: Shell, poorly define to S and W, overlapping G348.5−0.0 in E.
X-ray: Brighter to W.
Distance: HI absorption indicates 8.0 kpc.

References:

Last updated: 27 Jun 2017


G348.7+0.3

CTB 37B

Radio: Incomplete shell with faint eastern extensions.
X-ray: Diffuse emission.
Point sources: X-ray pulsar.
Distance: HI absorption suggests 13 kpc.

References:

Last updated: 13 May 2017


G349.2−0.1

Radio: Elongated shell, adjacent to bright HII region.

References:

Last updated: 27 Aug 1996


G349.7+0.2

Radio: Incomplete clumpy shell, with enhancement to the S.
X-ray: Irregular shell, brighter to S and E.
Distance: HI absorption indicates 11.5 kpc.

References:

Last updated: 16 Jun 2017


G350.0−2.0

Notes: Incorporates the previously catalogued G350.0−1.8 in the NW.

Radio: Shell, brightest in NW.
Optical: Detected.
X-ray: Brighter to NW.

References:

Last updated: 13 May 2017


G350.1−0.3

Radio: Several clumps of emission.
X-ray: Diffuse emission, with compact source.
Point sources: X-ray source.
Distance: HI absorption indicates 4.5 to 10.7 kpc, possible interaction with molecular cloud indicates 4.5 kpc.

References:

Last updated: 5 May 2017


G351.0−5.4

Radio: Faint shell, brighter to E and W.

References:

Last updated: 12 Jun 2017


G351.2+0.1

Notes: Has been called G351.3+0.2.

Radio: Distorted shell, with possible flat-spectrum core.

References:

Last updated: 13 Aug 1998


G351.7+0.8

Radio: Elongated shell, adjacent to bright HII region.
Point sources: Pulsar nearby.

References:

Last updated: 19 Feb 2009


G351.9−0.9

Radio: Asymmetric shell.

References:

Last updated: 21 Aug 1996


G352.7−0.1

Radio: Distorted shell.
X-ray: Detected.
Distance: HI absorption indicates 6.8 to 8.4 kpc.

References:

Last updated: 5 May 2017


G353.6−0.7

Notes: Has erroneously been called G353.6−0.37.

Radio: Shell, brighter to S.
X-ray: Detected.
Point sources: Central X-ray source.

References:

Last updated: 11 May 2017


G353.9−2.0

Radio: Shell, with central double source.

References:

Last updated: 8 Nov 2001


G354.1+0.1

Notes: Is this a SNR?

Radio: Elongated N–S.
Point sources: Pulsar at S tip.

References:

Last updated: 4 Jun 2017


G354.8−0.8

Radio: Distorted shell.

References:

Last updated: 1 Aug 2000


G355.4+0.7

Radio: Faint, incomplete shell.

References:

Last updated: 4 Jun 2017


G355.6−0.0

Radio: Well defined shell.
X-ray: Centrally brightened.

References:

Last updated: 25 Apr 2014


G355.9−2.5

Radio: Distorted shell, brightest to SE.

References:

Last updated: 25 Apr 2014


G356.2+4.5

Notes: Has been called G356.2+4.4.

Radio: Faint shell.

References:

Last updated: 27 Apr 2014


G356.3−1.5

Radio: Double arc.

References:

Last updated: 20 May 2014


G356.3−0.3

Notes: Has been suggested this part of a larger SNR.

Radio: Diffuse emission.

References:

Last updated: 13 May 2017


G357.7−0.1

MSH 17−39

Notes: Has been suggested that this is not a SNR.

Radio: Multiple arcs and filaments, brighter to NW `head'.
X-ray: Detected from NW `head', and SW `tail'.
Distance: HI absorption suggests beyond Galactic Centre.

References:

Last updated: 13 May 2017


G357.7+0.3

Radio: Non-thermal shell in complex region.

References:

Last updated: 11 May 2017


G358.0+3.8

Radio: Faint shell.

References:

Last updated: 27 Apr 2014


G358.1+1.0

Notes: Was erroneously called G358.1+0.1.

Radio: Faint shell.

References:

Last updated: 28 Apr 2017


G358.5−0.9

Radio: Shell, brighter to NE.

References:

Last updated: 16 Mar 2009


G359.0−0.9

Radio: Incomplete shell.
Optical: Detected.
X-ray: Partial shell.

References:

Last updated: 4 Jun 2017


G359.1−0.5

Radio: Non-thermal shell in complex region, crossed by the `snake'.
Optical: Detected.
X-ray: Centrally brightened.
Point sources: Several compact radio sources near centre, OH masers around edge.

References:

Last updated: 4 Jun 2017


G359.1+0.9

Radio: Shell, brightest in E.

References:

Last updated: 19 Feb 2009


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