Spectroscopic and photometric observations of SN1987A - V. Days 386-616

R. M. Catchpole, P. A. Whitelock, J. W. Menzies, M. W. Feast, F. Marang, K. Sekiguchi, F. van Wyk, G. Roberts, L. A. Balona, J. M. Egan, B. S. Carter, C. D. Laney, J. D. Laing, J. H. Spencer Jones, I. S. Glass, H. Winkler, A. P. Fairall, T. H H Lloyd Evans, M. S. Cropper, M. Shenton & 13 others P. W. Hill, P. Payne, K. N. Jones, W. Wargau, K. O. Mason, C. S. Jeffery, C. Hellier, Q. A. Parker, R. Chini, P. A. James, J. G. Doyle, C. J. Butler, G. Bromage

Research output: Contribution to journalArticle

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Abstract

We present spectroscopic and UBV(RI)CJHKLM photometric observations of SN1987A in the Large Magellanic Cloud made at the Sutherland Observatory of the SAAO between days 386 and 616 after the Kamiokande-II neutrino event. During this period the bolometric flux from the supernova measured over the U to M wavelength range has continued to decline faster than the 56Co decay rate. By day 560 the flux in this wavelength range accounts for only half of that expected from 56Co decay. The estimated total flux (including X-ray and γ-ray data) is consistent with 56Co remaining the sole energy source of the supernova over the period considered.

Original languageEnglish
Pages (from-to)55P-68P
JournalMonthly Notices of the Royal Astronomical Society
Volume237
Issue number1
DOIs
Publication statusPublished - 1989

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