SN 1997bs

{{Short description|Possible supernova from an Eta Carinae analog star}}

{{Infobox supernova|type=subluminous type lln|notes=Extragalactic Eta Carinae analog that may have survived the supernova|host=Messier 66|progenitor_type=Luminous blue variable|detected_by=LOSS|distance=31 million ly|image=M66, NGC 3627 (noao-m66).tiff|caption=Image of the host galaxy Messier 66}}

SN 1997bs was a subluminous type II supernova that occurred in the intermediate spiral galaxy Messier 66, about 31 million light years from Earth, in April of 1997. The progenitor star that produced this supernova was a massive luminous blue variable that was similar to the star Eta Carinae. This star was not associated with an H II region or any nearby massive stars. It is possible that the star that produced SN 1997bs survived the explosion and is hidden in a thick shell of dust with a mass of around 1 solar mass.{{Cite journal |last1=Van Dyk |first1=Schuyler D. |last2=Peng |first2=Chien Y. |last3=King |first3=Jennifer Y. |last4=Filippenko |first4=Alexei V. |last5=Treffers |first5=Richard R. |last6=Li |first6=Weidong |last7=Richmond |first7=Michael W. |date=December 2000|title=SN 1997bs in M66: Another Extragalactic η Carinae Analog?|journal=Publications of the Astronomical Society of the Pacific |language=en |volume=112 |issue=778 |pages=1532–1541 |doi=10.1086/317727 |bibcode=2000PASP..112.1532V |issn=0004-6280|arxiv=astro-ph/0009027 }}{{cite journal | arxiv=1502.00001 | doi=10.1093/mnras/stv1409 | doi-access=free | title=LOSS's first supernova? New limits on the 'impostor' SN 1997bs | date=2015 | last1=Adams | first1=Scott M. | last2=Kochanek | first2=C. S. | journal=Monthly Notices of the Royal Astronomical Society | volume=452 | issue=2 | pages=2195–2207 }}

File:SN1997bsLightCurve.png, plotted from data published by Van Dyk et al. (2000)]]

SN 1997bs was the first supernova discovered by the Lick Observatory Supernova Search (LOSS).

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