1st quadrant Galactic SNRs (0°<l<45°)


G0.0+0.0

Sgr A East

Radio: Non-thermal shell, in complex region, interacting with molecular material to the west.
X-ray: Diffuse emission, centrally peaked.
Point sources: Compact X-ray/radio source.

References:

Last updated: 4 Jun 2017


G0.3+0.0

Notes: Has been called G0.33+0.04 and G0.4+0.1.

Radio: Bilateral shell, near Galactic Centre.

References:

Last updated: 4 Jun 2017


G0.9+0.1

Radio: Flat spectrum core within steep spectrum shell.
X-ray: Central core, with non-thermal spectrum.
Point sources: Central pulsar.

References:

Last updated: 4 Jun 2017


G1.0−0.1

Notes: Has been called G1.05−0.1 and G1.05−0.15.

Radio: Incomplete shell, to the S of Sgr D.
X-ray: Possibly detected.

References:

Last updated: 4 Jun 2017


G1.4−0.1

Radio: Shell, brightest in E.

References:

Last updated: 4 Jun 2017


G1.9+0.3

Radio: Shell, brighter to the N, brightening; shows secular increase.
X-ray: Shell, with bright limbs to E and W.
Distance: HI absorption gives <10 kpc.

References:

Last updated: 12 Jun 2017


G3.7−0.2

Notes: Has been called G003.8−00.3.

Radio: Double arc.

References:

Last updated: 31 Mar 2006


G3.8+0.3

Radio: Incomplete shell.

References:

Last updated: 11 Jan 2004


G4.2−3.5

Radio: Elongated shell.
Optical: Detected.

References:

Last updated: 25 Apr 2014


G4.5+6.8

Kepler, SN1604, 3C358

Notes: This is the remnant of Kepler's SN of AD1604.

Radio: Incomplete shell, brighter to the N.
Optical: Faint filaments.
X-ray: Shell, brighter to the N.
Distance: Optical expansion and proper motion indicates about 2.9 kpc, HI observations suggest 3.4 to 6.4 kpc.

References:

Last updated: 16 Jun 2017


G4.8+6.2

Notes: Has been called G4.5+6.2.

Radio: Faint shell.

References:

Last updated: 25 Apr 2014


G5.2−2.6

Radio: Poorly resolved shell.

References:

Last updated: 25 Apr 2014


G5.4−1.2

Milne 56

Notes: Part been called G5.3−1.0. Has been suggested that this is not a SNR.

Radio: Incomplete shell, including wide `v' of emission to east with small flat-spectrum source at apex.
Optical: Detected.
X-ray: Pulsar detected, with faint extension.
Point sources: Pulsar nearby, in flat spectrum source.
Distance: HI absorption suggests >4.3 kpc.

References:

Last updated: 4 May 2017


G5.5+0.3

Notes: Has been called G5.55+0.32.

Radio: Shell.
Optical: Detected.

References:

Last updated: 11 May 2017


G5.9+3.1

Radio: Asymmetric shell.

References:

Last updated: 25 Apr 2014


G6.1+0.5

Notes: Has been called G6.10+0.53.

Radio: Partial shell.
Optical: Detected.

References:

Last updated: 11 May 2017


G6.1+1.2

Notes: Has been called G6.1+1.15.

Radio: Faint, diffuse emission.

References:

Last updated: 25 Apr 2014


G6.4−0.1

W28

Notes: Has been called G6.6−0.2.

Radio: Several non-thermal sources in a ring, with flat spectrum core.
Optical: Diffuse emission.
X-ray: Diffuse emission from most of the remnant.
Point sources: Young pulsar near edge of remnant, but not thought to be related.
Distance: HI observations suggest 1.9 kpc.

References:

Last updated: 12 Jun 2017


G6.4+4.0

Radio: Faint asymmetric shell.

References:

Last updated: 25 Apr 2014


G6.5−0.4

Notes: Has been called G6.51−0.48, and part has been called G6.67−0.42.

Radio: Shell, overlapping G6.4−0.1.
Optical: Detected.

References:

Last updated: 4 Jun 2017


G7.0−0.1

Notes: Has been called G7.06−0.12.

Radio: Double rim, brightest in W, confused by bright HII region M20 in SE.

References:

Last updated: 10 Oct 2001


G7.2+0.2

Notes: Has been called G7.20+0.20.

Radio: Partial shell.

References:

Last updated: 25 Apr 2014


G7.7−3.7

1814−24

Radio: Shell, with high polarisation.

References:

Last updated: 25 Apr 2014


G8.3−0.0

Notes: Has been called G8.31−0.09.

Radio: Shell.

References:

Last updated: 13 May 2017


G8.7−5.0

Radio: Asymmetric shell.

References:

Last updated: 25 Apr 2014


G8.7−0.1

(W30)

Notes: Has been called G8.6−0.1.

Radio: Clumpy non-thermal shell, with low-frequency turnover.
X-ray: Northern edge detected.
Point sources: Pulsar inside western edge.

References:

Last updated: 13 May 2017


G8.9+0.4

Notes: Has been called G8.90+0.40.

Radio: Shell.

References:

Last updated: 25 Apr 2014


G9.7−0.0

Notes: Has been called G9.7−0.1 and G9.70−0.06.

Radio: Shell.

References:

Last updated: 13 May 2017


G9.8+0.6

Radio: Asymmetric shell.

References:

Last updated: 13 Aug 1998


G9.9−0.8

Notes: Has been called G9.95−0.81.

Radio: Shell.
Optical: Detected.

References:

Last updated: 13 May 2017


G10.5−0.0

Notes: Has been called G10.59−0.04.

Radio: Partial shell.
X-ray: Possibly detected.

References:

Last updated: 28 Apr 2017


G11.0−0.0

Notes: Has been called G11.0+0.0 and G11.03−0.05.

Radio: Partial shell.
X-ray: Diffuse emission.

References:

Last updated: 13 May 2017


G11.1−1.0

Notes: Has been called G11.2−1.1 and G11.17−1.04.

Radio: Shell.
Optical: Detected.

References:

Last updated: 28 Apr 2014


G11.1−0.7

Notes: Has been called G11.15−0.71.

Radio: Partial shell.

References:

Last updated: 29 Mar 2006


G11.1+0.1

Notes: Has been called G11.18+0.11.

Radio: Shell.

References:

Last updated: 13 May 2017


G11.2−0.3

Notes: Probably associated with the SN of AD386.

Radio: Symmetrical clumpy shell, with flatter spectrum core.
X-ray: Shell, with hard spectrum centrally brightened region around pulsar.
Point sources: Central pulsar.
Distance: HI absorption indicates 4.4 kpc.

References:

Last updated: 16 Jun 2017


G11.4−0.1

Radio: Incomplete shell, possibly with central core.

References:

Last updated: 13 May 2017


G11.8−0.2

Notes: Has been called G11.89−0.21.

Radio: Shell.
X-ray: Possibly detected.

References:

Last updated: 28 Apr 2017


G12.0−0.1

Radio: Incomplete shell, defined in E only.
X-ray: Detected, including possible PWN.

References:

Last updated: 4 May 2017


G12.2+0.3

Notes: Has been called G12.26+0.30.

Radio: Partial shell.

References:

Last updated: 13 May 2017


G12.5+0.2

Notes: Has been called G12.58+0.22.

Radio: Diffuse, central brightened.

References:

Last updated: 25 Apr 2014


G12.7−0.0

Notes: Has been called G12.72−0.00.

Radio: Shell.

References:

Last updated: 25 Apr 2014


G12.8−0.0

Notes: Has been called G12.82−0.02 and G12.83−0.02.

Radio: Shell.
X-ray: Diffuse.
Point sources: Central X-ray pulsar.

References:

Last updated: 28 Apr 2017


G13.3−1.3

Radio: Amorphous emission.
Optical: Filaments in S.
X-ray: Elongated emission.
Distance: Absorption indicates 2–4 kpc.

References:

Last updated: 1 Aug 2000


G13.5+0.2

Notes: Has been called G13.46+0.16.

Radio: Elongated, incomplete shell.

References:

Last updated: 11 May 2017


G14.1−0.1

Notes: Has been called G14.18−0.12.

Radio: Shell.

References:

Last updated: 25 Apr 2014


G14.3+0.1

Notes: Has been called G14.30+0.14. Has been suggested this is not an SNR.

Radio: Partial shell.

References:

Last updated: 20 May 2014


G15.1−1.6

Radio: Elongated, incomplete shell.
Optical: Diffuse shell.

References:

Last updated: 24 May 2014


G15.4+0.1

Notes: Has been called G15.42+0.18.

Radio: Shell.
X-ray: Centrally brightened.
Distance: HI observations suggest 4.8 kpc.

References:

Last updated: 12 Jun 2017


G15.9+0.2

Radio: Incomplete shell, with bright concentration to the E.
X-ray: Shell, brighter to S and E.
Point sources: Central X-ray source.

References:

Last updated: 16 Jun 2017


G16.0−0.5

Notes: Has been called G16.05−0.57.

Radio: Shell.

References:

Last updated: 11 May 2017


G16.2−2.7

Radio: Double rim.

References:

Last updated: 24 May 2014


G16.4−0.5

Notes: Has been called G16.41−0.55.

Radio: Partial shell.

References:

Last updated: 25 Apr 2014


G16.7+0.1

Notes: Has been called G16.73+0.08.

Radio: Asymmetric shell with flat-spectrum core.
X-ray: Non-thermal core.

References:

Last updated: 13 May 2017


G17.0−0.0

Notes: Has been called G17.02−0.04.

Radio: Shell.

References:

Last updated: 25 Apr 2014


G17.4−2.3

Radio: Incomplete, poorly defined shell.
Optical: Filaments to SE, and diffuse emission.

References:

Last updated: 24 May 2014


G17.4−0.1

Notes: Has been called G17.48−0.12.

Radio: Partial shell.

References:

Last updated: 13 May 2017


G17.8−2.6

Radio: Well defined shell.

References:

Last updated: 24 May 2014


G18.1−0.1

Notes: Has been called G18.1−0.2 and G18.16−0.16.

Radio: Shell.
X-ray: Possibly detected.
Distance: HI absorption suggests 5.6 kpc.

References:

Last updated: 13 May 2017


G18.6−0.2

Notes: Has been called G18.62−0.28.

Radio: Partial shell.

References:

Last updated: 13 May 2017


G18.8+0.3

Kes 67

Notes: Has been called G18.9+0.3.

Radio: Incomplete shell, in complex region near the HII region W39.
Distance: Association with molecular cloud and HI absorption suggests 12 kpc.

References:

Last updated: 11 May 2017


G18.9−1.1

Notes: Has been called G18.95−1.1 and G18.94−1.04.

Radio: Non-thermal, diffuse partially limb-brightened, with central ridge.
Optical: Detected.
X-ray: Partial shell.
Point sources: Compact X-ray source, with diffuse nebula.
Distance: Various observations suggest 2 kpc.

References:

Last updated: 13 May 2017


G19.1+0.2

Notes: Has been called G19.15+0.27.

Radio: Partial shell.

References:

Last updated: 29 Mar 2006


G20.0−0.2

Radio: Faint, filled-centre, polarised.
X-ray: Centrally brightened.
Point sources: OH source 20.1−0.1 is nearby.

References:

Last updated: 13 May 2017


G20.4+0.1

Notes: Has been called G20.47+0.16.

Radio: Shell.

References:

Last updated: 24 May 2014


G21.0−0.4

Notes: Has been called G21.04−0.47.

Radio: Shell.

References:

Last updated: 29 Mar 2006


G21.5−0.9

Notes: Early observations relate to the central core only.

Radio: Filled-centre, with high frequency turnover.
X-ray: Central core, with extended, faint halo.
Point sources: Central pulsar.
Distance: HI absorption indicates 4.6 kpc.

References:

Last updated: 13 May 2017


G21.5−0.1

Notes: Has been called G21.56−0.10.

Radio: Partial shell.
X-ray: Possibly detected.

References:

Last updated: 28 Apr 2017


G21.6−0.8

Notes: Has been called G21.64−0.84.

Radio: Faint, irregular shell.

References:

Last updated: 11 May 2017


G21.8−0.6

Kes 69

Radio: Incomplete shell.
X-ray: Detected.
Distance: Association with CO indicates 5.2 kpc.

References:

Last updated: 11 May 2017


G22.7−0.2

Radio: Non-thermal ring in complex region, overlapping G23.3−0.3.
Point sources: Variable radio source near centre, and γ-ray source near edge.
Distance: association with CO indicates 4.4 kpc.

References:

Last updated: 11 May 2017


G23.3−0.3

W41

Radio: Distorted ring, in complex region, overlapping G22.7−0.2.
X-ray: Possible extended emission, with compact sources.
Point sources: Pulsar association suggested.
Distance: HI and CO observations indicate 4.2 kpc.

References:

Last updated: 13 May 2017


G23.6+0.3

Notes: Has been suggested this is not an SNR.

Radio: Not well resolved, in complex region.

References:

Last updated: 13 May 2017


G24.7−0.6

Radio: Incomplete shell, defined in SW.

References:

Last updated: 13 Aug 1998


G24.7+0.6

Radio: Filled-centre, with faint shell, and a compact HII region to the S.

References:

Last updated: 13 May 2017


G25.1−2.3

Radio: Incomplete shell, extent not well defined.

References:

Last updated: 30 Apr 2014


G27.4+0.0

4C−04.71

Notes: Early references refer to G27.3−0.1 (Kes 73), a supposed larger remnant.

Radio: Incomplete shell.
X-ray: Diffuse emission, with central low period pulsar.
Point sources: Central AXP.
Distance: HI absorption suggests 7.5 to 9.8 kpc.

References:

Last updated: 16 Jun 2017


G27.8+0.6

Radio: Filled-centre, with spectral turnover.
X-ray: Possible pulsar wind nebula.

References:

Last updated: 11 May 2017


G28.6−0.1

Radio: Poorly defined regions of non-thermal emission.
X-ray: Diffuse shell, with thermal and non-thermal emission.

References:

Last updated: 11 Jan 2006


G28.8+1.5

Radio: Part of rim detected.
X-ray: Diffuse, Centrally brightened.

References:

Last updated: 11 May 2017


G29.6+0.1

Radio: Diffuse shell.
Point sources: AXP associated.

References:

Last updated: 13 May 2017


G29.7−0.3

Kes 75

Notes: Has erroneously been called G29.6+0.1.

Radio: Shell with flatter spectrum emission from centre.
X-ray: Thermal shell and non-thermal core, and central pulsar.
Point sources: X-ray pulsar.
Distance: Association with CO implies 11 kpc.

References:

Last updated: 16 Jun 2017


G30.7−2.0

Radio: Poorly defined.

References:

Last updated: 13 Aug 1998


G30.7+1.0

Radio: Non-thermal, highly polarised part shell?
Point sources: Compact source near centre.

References:

Last updated: 28 Apr 2014


G31.5−0.6

Notes: Has been called G31.55−0.65.

Radio: Distorted shell? near HII region.
Optical: Diffuse, incomplete shell.

References:

Last updated: 17 Oct 2001


G31.9+0.0

3C391

Radio: Shell, brightest in NW, with low frequency turnover.
X-ray: Diffuse with central core.
Distance: HI absorption suggests 7.2 kpc.

References:

Last updated: 16 Jun 2017


G32.0−4.9

3C396.1

Radio: Possible large shell?

References:

Last updated: 25 Feb 1988


G32.1−0.9

Radio: Possible faint shell, not well defined.
X-ray: Diffuse, with clumps.

References:

Last updated: 11 May 2017


G32.4+0.1

Notes: Has been called G32.45+0.1.

Radio: Shell.
X-ray: Shell.
Distance: X-ray absorption suggests 17 kpc.

References:

Last updated: 13 May 2017


G32.8−0.1

Kes 78

Notes: Part has been called G33.1−0.1.

Radio: Elongated shell?
Optical: Detected.
X-ray: Detected.
Distance: Association with CO indicates 4.8 kpc.

References:

Last updated: 13 May 2017


G33.2−0.6

Radio: Incomplete shell.
Optical: Filaments and diffuse emission.

References:

Last updated: 11 May 2017


G33.6+0.1

Kes 79, 4C00.70, HC13

Notes: Has been called G33.7+0.0.

Radio: Shell, with bright central region, in complex region.
X-ray: Multiple shells and filaments.
Point sources: Central X-ray pulsar.
Distance: HI absorption gives about 7.8 kpc.

References:

Last updated: 13 May 2017


G34.7−0.4

W44, 3C392

Notes: Has been called G34.6−0.5.

Radio: Distorted shell, brighter to the E, with pulsar and associated nebula.
Optical: Diffuse emission.
X-ray: Centrally concentrated, thermal spectrum, plus pulsar wind nebula.
Point sources: Pulsar within the boundary of the remnant.
Distance: HI absorption indicates ~3 kpc.

References:

Last updated: 16 Jun 2017


G35.6−0.4

Notes: Re-identified as SNR in 2009.

Radio: Diffuse, with some limb brightening.

References:

Last updated: 5 May 2017


G36.6−0.7

Radio: polarised arc, possibly part of a larger shell?

References:

Last updated: 24 May 2014


G36.6+2.6

Radio: Poorly resolved shell.

References:

Last updated: 19 May 1992


G38.7−1.3

Notes: G38.7−1.4 refers to the E portion.

Radio: Incomplete shell.
Optical: Arc of filaments, brighter to E.
X-ray: Detected in E.

References:

Last updated: 11 May 2017


G39.2−0.3

3C396, HC24, NRAO 593

Radio: Shell, brighter to W, with faint `tail' to E.
X-ray: Diffuse, brighter to W, with central core.
Point sources: Central X-ray source.
Distance: HI absorption suggests >7.7 kpc.

References:

Last updated: 16 Jun 2017


G39.7−2.0

W50, SS433

Notes: Eastern part has been called G40.0−3.1. Is this a SNR?

Radio: Elongated shell, containing SS433, adjacent to the HII region S74.
Optical: Faint filaments at the edge of the radio emission.
X-ray: Emission from SS433 and two lobes.
Point sources: SS433 is the compact source in the centre of the W50.
Distance: HI absorption indicates 6.0±0.5 kpc.

References:

Last updated: 30 May 2014


G40.5−0.5

Radio: Shell, brightest to the NE.

References:

Last updated: 5 May 2017


G41.1−0.3

3C397

Radio: 3C397 is two sources: the E is the SNR, the W is a HII region.
X-ray: Brighter to the E and W, with central component.
Distance: HI absorption suggest 8 to 10 kpc.

References:

Last updated: 16 Jun 2017


G41.5+0.4

Radio: Partial clumpy shell, brighter to NE.

References:

Last updated: 15 May 2014


G42.0−0.1

Radio: Irregular shell.

References:

Last updated: 16 May 2014


G42.8+0.6

Notes: Has been called G42.8+0.65.

Radio: Faint shell.
Point sources: Near soft gamma repeater, and young pulsar.

References:

Last updated: 11 Jan 2004


G43.3−0.2

W49B

Radio: Shell, brightest to the SE and W, near the HII region W49A.
X-ray: Centrally brightened, elongated E–W.
Point sources: Compact X-ray source.
Distance: HI absorption indicates 10 kpc.

References:

Last updated: 16 Jun 2017


G43.9+1.6

Radio: Large, poorly defined faint shell.
Point sources: Soft gamma repeater nearby.

References:

Last updated: 24 May 2014


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