Cygnus Loop

Notes: Has been suggested that this is two overlapping remnants.

Radio: Shell, brightest to the NE, with fainter breakout region to S, with spectral variations.
Optical: Large filamentary loop, brightest to the NE, not well defined to the S or W.
X-ray: Shell in soft X-rays.
Point sources: Several compact radio sources within the boundary of the remnant, including CL4, plus X-ray sources in S.
Distance: Optical proper motion and shock velocity gives 0.44 kpc.


Last updated: 16 Jun 2017

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Dave Green/Cambridge, UK/