Note: this is an archived version which has been superseded. The current SNR catalogue is at http://www.mrao.cam.ac.uk/surveys/snrs/

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.

References:

Last updated: 20 AUG 1996


G0.9+0.1

Radio: Flat spectrum core within steep spectrum shell.
X-ray: Possibly detected.

References:

Last updated: 27 JUN 1995


G1.0-0.1

Notes: Has been called G1.05-0.1.

Radio: Incomplete shell, to the S of Sgr D.

References:

Last updated: 22 AUG 1996


G1.4-0.1

Radio: Shell, brightest in E.

References:

Last updated: 30 JUN 1995


G1.9+0.3

Radio: Shell, brighter to the N.

References:

Last updated: 27 JUN 1995


G3.7-0.2

Radio: Double arc.

References:

Last updated: 30 JUN 1995


G3.8+0.3

Radio: Incomplete shell.

References:

Last updated: 30 JUN 1995


G4.2-3.5

Radio: Elongated shell.

References:

Last updated: 19th May 1992


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: Historical observations indicate about 4.4 kpc.

References:

Last updated: 01 JUL 1995


G5.2-2.6

Radio: Poorly resolved shell.

References:

Last updated: 19th May 1992


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.
Distance: HI absorption suggests >4.3 kpc.
Point sources: Pulsar associated with flat spectrum source.

References:

Last updated: 27 JUN 1995


G5.9+3.1

Radio: Asymmetric shell.

References:

Last updated: 19th May 1992


G6.1+1.2

Notes: Has been called G6.1+1.15.

Radio: Faint, diffuse emission.

References:

Last updated: 28 JUN 1995


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: Filaments.
X-ray: Diffuse emission from most of the remnant.
Point sources: Young pulsar near edge of remnant.
Distance: Uncertain mean optical velocity indicates 3.5--4 kpc.

References:

Last updated: 20 AUG 1996


G6.4+4.0

Radio: Faint asymmetric shell.

References:

Last updated: 19th May 1992


G7.7-3.7 1814-24

Radio: Shell, with high polarization.

References:

Last updated: 20 AUG 1996


G8.7-5.0

Radio: Asymmetric shell.

References:

Last updated: 19th May 1992


G8.7-0.1 (W30)

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

References:

Last updated: 27 JUN 1995


G9.8+0.6

Radio: Asymmetric shell.

References:

Last updated: 27 JUN 1995


G10.0-0.3

Radio: Not well resolved.
X-ray: Detected.
Point sources: Associated with soft gamma repeater.

References:

Last updated: 20 AUG 1996


G11.2-0.3

Notes: Probably associated with the SN of AD386.

Radio: Symmetrical clumpy shell, possibly with flatter spectrum core.
X-ray: Shell, with hard spectrum centrally brightened region.
Distance: HI absorption indicates 5 kpc.

References:

Last updated: 20 AUG 1996


G11.4-0.1

Radio: Incomplete shell, possibly with central core.

References:

Last updated: 27 JUN 1995


G12.0-0.1

Radio: Incomplete shell, defined in E only.

References:

Last updated: 27 JUN 1995


G13.3-1.3

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

References:

Last updated: 21 AUG 1996


G13.5+0.2

Notes: Has been called G13.46+0.16.

Radio: Elongated, incomplete shell.

References:

Last updated: 20th May 1992


G15.1-1.6

Radio: Elongated, incomplete shell.

References:

Last updated: 19th May 1992


G15.9+0.2

Radio: Incomplete shell, with bright concentration to the E.

References:

Last updated: 20 AUG 1996


G16.7+0.1

Notes: Has been called G16.73+0.08.

Radio: Asymmetric shell with flat-spectrum core.

References:

Last updated: 12th June 1990


G16.8-1.1

Radio: Overlapping thermal and non-thermal emission, parameters uncertain.
Point sources: Pulsar within boundary of non-thermal emission.

References:

Last updated: 05 APR 1993


G17.4-2.3

Radio: Incomplete, poorly defined shell.

References:

Last updated: 19th May 1992


G17.8-2.6

Radio: Well defined shell.

References:

Last updated: 19th May 1992


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: HI absorption indicates >9.5 kpc, and possibly <19 kpc.

References:

Last updated: 20 AUG 1996


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.
X-ray: Partial shell.

References:

Last updated: 19th May 1992


G20.0-0.2

Radio: Faint, filled-centre, polarized.
Point sources: OH source 20.1-0.1 is nearby.

References:

Last updated: 6 November 1987 *


G21.5-0.9

Radio: Filled-centre, with high frequency turnover.
X-ray: Detected, with power-law spectrum.
Distance: HI absorption indicates 5.5 kpc.

References:

Last updated: 01 JUL 1995


G21.8-0.6 Kes 69

Radio: Incomplete shell.
X-ray: Detected.
Distance: H2CO absorption indicates >6.3 kpc.

References:

Last updated: 13th May 1992


G22.7-0.2

Radio: Non-thermal ring in complex region, overlapping G23.3-0.3.

References:

Last updated: 13th May 1992


G23.3-0.3 W41

Radio: Incomplete ring, in complex region, overlapping G22.7-0.2.
Point sources: Pulsar association suggested.

References:

Last updated: 20 AUG 1996


G23.6+0.3

Radio: Not well resolved, in complex region.

References:

Last updated: 25th February 1988


G24.7-0.6

Radio: Incomplete shell, defined in SW.

References:

Last updated: 20 AUG 1996


G24.7+0.6

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

References:

Last updated: 1st March 1988


G27.4+0.0 4C-04.71

Notes: Early references refer to G27.3-0.1, a supposed larger remnant.

Radio: Incomplete shell.
X-ray: Diffuse emission, with central compact component.
Point sources: Compact X-ray source.
Distance: HI absorption indicates 6 to 7.5 kpc.

References:

Last updated: 27 JUN 1995


G27.8+0.6

Radio: Filled-centre, with spectral turnover.

References:

Last updated: 20 AUG 1996


G28.8+1.5

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

References:

Last updated: 30 JUN 1995


G29.7-0.3 Kes 75

Radio: Shell with flatter spectrum emission from centre.
X-ray: Detected.
Distance: HI absorption indicates >9 kpc and possibly at 21 kpc.

References:

Last updated: 22 AUG 1996


G30.7-2.0

Radio: Poorly defined.

References:

Last updated: 19th May 1992


G30.7+1.0

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

References:

Last updated: 13th May 1992


G31.5-0.6

Notes: Has been called G31.55-0.65.

Radio: Distorted shell? near HII region.

References:

Last updated: 25th February 1988


G31.9+0.0 3C391

Radio: Shell, brightest in NW.
X-ray: Diffuse shell.
Distance: HI absorption is seen to the tangent point (8.5 kpc).

References:

Last updated: 20 AUG 1996


G32.0-4.9 3C396.1

Radio: Possible large shell?

References:

Last updated: 25th February 1988


G32.8-0.1 Kes 78

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

Radio: Elongated shell?

References:

Last updated: 03 MAY 1993


G33.2-0.6

Radio: Incomplete shell.

References:

Last updated: 20 AUG 1996


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: Detected.
Distance: HI absorption gives about 10 kpc.

References:

Last updated: 30 JUN 1995


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.
X-ray: Centrally concentrated, thermal spectrum, plus pulsar nebula.
Point sources: Pulsar within the boundary of the remnant.
Distance: HI absorption indicates 3 kpc.

References:

Last updated: 22 AUG 1996


G36.6-0.7

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

References:

Last updated: 13th May 1992


G36.6+2.6

Radio: Poorly resolved shell.

References:

Last updated: 19th May 1992


G39.2-0.3 3C396, HC24, NRAO 593

Radio: Shell, brightest to the W, with faint ``tail" to E.
X-ray: Centrally brightened.
Distance: HI absorption suggests at least 7.7 kpc.

References:

Last updated: 27 JUN 1995


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: Distance to SS433 is 5 kpc.

References:

Last updated: 01 JUL 1995


G40.5-0.5

Radio: Shell, brightest to the NE.

References:

Last updated: 25th February 1988


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.
Distance: Possible limit of >7.5 kpc for non-thermal component from HI absorption.

References:

Last updated: 27 JUN 1995


G42.8+0.6

Notes: Has been called G42.8+0.65.

Radio: Faint shell.
Point sources: Near soft gamma repeater.

References:

Last updated: 27 JUN 1995


G43.3-0.2 W49B

Radio: Shell, brightest to the SE and W, near the HII region W49A.
X-ray: Filled-centre.
Distance: HI absorption indicates 10 kpc.

References:

Last updated: 20 AUG 1996


G43.9+1.6

Radio: Large, poorly defined faint shell.

References:

Last updated: 27 JUN 1995


Dave Green/MRAO, Cambridge, UK/D.A.Green@mrao.cam.ac.uk