Abstract
view Abstract Citations (8) References (3) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Supernova 1956a of type I in NGC 3992 Zwicky, F. ; Karpowicz, Maria Abstract A photographic light curve of the supernova 1956a in NGC 3992 is established. A few photovisual magni- tudes have also been determined. According to spectra obtained by Mayall at the Lick Observatory, the supernova is of type I. As is generally the case, the photographic magnitudes, following thirty days after maximum brightness, decrease very approximately linearly for the next 450 days. The rate of decline is about one magnitude per 80 days, a value which is intermediate between that of one magnitude per 57 days of SN 1954a in NGC 4214 and one magnitude per 116 days for the initial fading of SN 1937d in NGC 1003. The absolute indicative photographic magnitude of SN 1956a at maximum is about I = -17.4. Publication: The Astronomical Journal Pub Date: November 1964 DOI: 10.1086/109352 Bibcode: 1964AJ.....69..759Z full text sources ADS | data products SIMBAD (23) NED (8)
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