OBJ: SN Ia 1990n in NGC 4639, a mostly normal Ia. DATE: January 14--15 1992: This is 571--572 days after the explosion assuming the rise time to the B maximum was 18 days. OBS: Kirshner et al. ? I got this from Pete Challis REP: F_lambda (cgs) vs. lambda (ang) COR: not dereshifted (heliocentric velocity 975\pm10), not derreddened (foreground Galactic E(B-V)=0.0125), somewhat smoothed, Additional Information: z0001 "SN 90N; 550 days past maximum" 14/01/92 9000. But what use is it? COMMENT: This is the averaged days 571 and 572 spectrum. The fact that it is in reasonable agreement with the Doggett & Branch extrapolated B light curve suggests there is real signal. Certainly the spectral shape doesn't suggest any such thing. REF: ? DAY: 571. 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