Note: this is an archived version which has been superseded. The current SNR catalogue is at

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), and pulsar nebula.
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.


Last updated: 11 Jan 2004

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Dave Green/MRAO, Cambridge, UK/