Deconvolution of a pre-outburst picture of SN 1987A

Details Deconvolution of a pre-outburst picture of SN 1987A Deconvolution of a pre-outburst picture of SN 1987A

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...185l..10h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 185, no. 1-2, Oct. 1987, p. L10-L12.

Statistics

Computation

7

Computational Astrophysics, Image Processing, Iterative Solution, Pixels, Supernova 1987A, Photographic Plates, Telescopes

Scientific paper

The authors have applied the block iterative method (Young 1971) of algebraic image restoration to a photographic plate of the field around SN 1987A obtained four years before outburst by Chu at the CTIO 4-meter telescope. By setting appropriate constraints for the solution on a pixel-by-pixel basis, they have restored the image of a starfield centered on Sk -69°202, the precursor to the supernova. It is found that this star has two companions, which others (e.g. Walborn et al. 1987, West et al. 1987) have also noted and designated as Star 2 and Star 3. The authors also find marginal evidence for Star 4, a weak source at θ = 222°, r = 1arcsec.9. Correction for the contributions of these companions yields an estimate of the magnitude for Sk -69°202 alone of V = 12.37.

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