Note: this is an archived version which has been superseded.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

3rd quadrant Galactic SNRs


G180.0-1.7 S147

Radio: Large faint shell, with spectral break.
Optical: Wispy ring.
X-ray: Possible detection.
Point sources: Pulsar within boundary.

References:

Last updated: 1 Aug 2000


G182.4+4.3

Radio: Incomplete shell.

References:

Last updated: 14 Aug 1998


G184.6-5.8 Crab Nebula, 3C144, SN1054

Notes: This is the remnant of the SN of AD1054.

Radio: Filled-centre, central pulsar, with faint `jet' (or tube) extending from the N edge.
Optical: Strongly polarized filaments, diffuse synchrotron emission, with `jet' faintly visible.
X-ray: Central `torus' around the pulsar.
Point sources: Pulsar powering the remnant.
Distance: Proper motions and radial velocities give 2 kpc.

References:

Last updated: 26 Nov 2001


G189.1+3.0 IC443, 3C157

Radio: Limb-brightened to NE, with faint extension to the E.
Optical: Brightest to the NE, with faint filaments outside the NE boundary.
X-ray: Shell, brightest to the NE, with nebula and compact source.
Point sources: Compact X-ray source in S.
Distance: Mean optical velocity suggests 0.7-1.5 kpc, association with S249 gives 1.5-2 kpc.

References:

Last updated: 31 Dec 2001


G192.8-1.1 PKS 0607+17

Notes: Has been called G193.3-1.5. Has been regarded as part of the Origem Loop, a supposed larger remnant.

Radio: In complex region.
Optical: Encompasses S261 and S254-258.

References:

Last updated: 31 Dec 2001


G205.5+0.5 Monoceros Nebula

Radio: In complex region, parts may be HII regions.
Optical: Large ring, near Rosette nebula.
X-ray: Possibly detected.
Distance: Mean optical velocity suggests 0.8 kpc, low frequency radio absorption suggests 1.6 kpc.

References:

Last updated: 13 Aug 1998


G206.9+2.3 PKS 0646+06

Radio: Diffuse source near the Monoceros Nebula.
Optical: Filaments detected.
X-ray: Possibly detected.

References:

Last updated: 13 Aug 1998


G260.4-3.4 Puppis A, MSH 08-44

Notes: This remnant overlaps the Vela SNR (G263.9-3.3).

Radio: Angular shell, brightest to the E, poorly defined to the W.
Optical: Nebulosity and wisps.
X-ray: Brightest to the E.
Point sources: Central source, a possible pulsar in X-rays.
Distance: Association with HI gives 2.2±0.3 kpc; OH absorption/emission in vicinty implies 0.5 to 1.9 kpc.

References:

Last updated: 17 Oct 2001


G261.9+5.5

Radio: Faint shell with little limb brightening.

References:

Last updated: 13 Aug 1998


G263.9-3.3 Vela (XYZ)

Notes: This refers to the whole Vela XYZ complex, of which X has at times been classified as a separate (filled-centre) remnant. This remnant is overlapped by G260.4-3.4 and G266.2-1.2.

Radio: Large shell, with flatter spectrum component (Vela X).
Optical: Filaments.
X-ray: Patchy shell, with extensions, central nebula and pulsar.
Point sources: Pulsar within Vela X, with one-sided `jet'.
Distance: Vela pulsar parallax gives 0.3 kpc, optical spectra and HI studies suggest 0.25 kpc.

References:

Last updated: 26 Nov 2001


G266.2-1.2

Notes: This remnant overlaps the Vela SNR (G263.9-3.3).

Radio: Incomplete shell, confused by the Vela SNR.
Optical: Possible nebulosity associated.
X-ray: Non-thermal shell, confused by the Vela SNR, with central source.
Point sources: Central X-ray source.
Distance: X-ray data suggest an upper limit of 1 kpc.

References:

Last updated: 17 Oct 2001


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