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SN 1987A

The radio emission from SN 1987A has been observed with Australian telescopes since a few days after the first detection of the supernova in February 1987. The initial outburst (Turtle et al. 1987) was short-lived. From mid-1990 a new phase of radio emission began, with an increasing flux density and an optically thin spectrum. These are the first observations of the birth of a supernova remnant. The paper by Manchester et al. "Evolution of the Radio Remnant of SN 1987A: 1990 - 2001", PASA, 19, 207-221 (2002) summarises the first decade of this development.

Super-resolved 9 GHz images of the remnant of SN 1987A (SNR 1987A) obtained using the 6 km Australia Telescope Compact Array. The radio image fits within the inner optical recombination line ring and is aligned with it. Although the radio source is steadily increasing in brightness, it is expanding rather slowly. The east-west asymmetry is becoming more pronounced with time.

ATCA Flux densities for SNR 1987A

Flux densities for SNR 1987A measured at the ATCA since July 1990 are listed below. Each file contains the day number since the SN explosion (MJD - 46849.3), the central observing frequency in MHz, the integrated flux density of SNR 1987A in mJy and its estimated uncertainty in mJy, and the integrated flux density of J0536-6918 in mJy and its estimated uncertainty in mJy.

Measured flux densities for the radio remnant of SN 1987A in four bands, obtained using the ATCA. Note that recent data are preliminary only and in some cases are affected by instrumental problems.

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CSIRO - Australian Science, Australia's Future

11 February 2003 - R. N. Manchester (rmanches@atnf.csiro.au)