Earliest photometry of SN 1987A.
1992; EDP Sciences; Volume: 256; Issue: 2 Linguagem: Inglês
ISSN
1432-0746
AutoresR. M. West, Robert H. McNaught,
Tópico(s)Geological and Geophysical Studies
ResumoSeven wide-field photographic exposures, obtained of the LMC field on 1987 Feb. 22-24 in Australia, and including the earliest recorded images of SN 1987A, have been scanned and photometrically calibrated by means of bright field stars. Accurate V-magnitudes of SN 1987A are derived by means of fixed-diaphragm, colour adjusted, integrated fluxes; on Feb. 23 it is found to be 0.2-0.8 mag brighter than indicated by earlier estimates, based on image diameters alone. The measurements now agree rather better with the theoretical light curves, e.g. those by Woosley (1988)
Referência(s)