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3rd of March 2017
Supernova SN1987A: 30 years since discovery - Part III
by Dick Manchester (CASS)
Early imaging observations with the ATCA (Staveley-Smith et al. 1993) showed that the radio supernova remnant had an annular form with a diameter of about 1.5 arcsec and a somewhat asymmetric east-west flux density distribution. The highest-resolution radio images have been obtained using the ATCA at high frequencies - the picture, from Zanardo et al. 2013, 767, 98, shows a diffraction-limited 44 GHz image illustrating this asymmetry and also the clumpy nature of the ring. These clumps roughly correspond to those seen in X-rays using the Chandra X-ray Observatory. There is a hint of a central emission nebula which could be associated with a pulsar born in the SN explosion.

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