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SN 2009ip
Event type	Supernova
	type IIn
Constellation	Piscis Austrinus
Right ascension	22h 23m 08.26s
Declination	−28° 56′ 52.4″
Epoch	J2000.0
Notable features	located in the host galaxy NGC 7259
	[edit on Wikidata]

SN 2009ip was a supernova discovered in 2009 in the spiral galaxy NGC 7259 in the constellation of Piscis Austrinus.^[1] Since the brightness waned after days post-discovery, it was redesignated as Luminous blue variable (LBV) Supernova impostor.^[2]

During the following years several luminous outbursts were detected from the SN 2009ip.^[3]^[2] In September 2012 SN 2009ip was classified as a young type IIn supernova.^[4]

References

^ ^a ^b ^c "NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved December 4, 2017.
^ ^a ^b "Supernova impostor explodes for real". www.newscientist.com. Retrieved November 29, 2017.
^ Drake, A. J; Howerton, S; McNaught, R; Djorgovski, S. G; Mahabal, A. A; Graham, M. J; Williams, R; Prieto, J; Catelan, M; Christensen, E; Larson, S (2012). "A New Luminous Outburst from SN 2009ip". The Astronomer's Telegram. 4334: 1. Bibcode:2012ATel.4334....1D.
^ Burgasser, Adam; Nicholls, C; Aberasturi, Miriam (2012). "NIR Spectrum of SN 2009ip on 2012 Sep 27.3 Confirms Interpretation as a Type IIn". The Astronomer's Telegram. 4431: 1. Bibcode:2012ATel.4431....1B.

Martin, J. C.; Hambsch, F. -J.; Margutti, R.; Tan, T. G.; Curtis, I.; Soderberg, A. (January 2015). "A Closer Look At the Fluctuations in the Brightness of Sn 2009ip During Its Late 2012 Eruption". The Astronomical Journal. 149 (1): 11. arXiv:1308.3682. Bibcode:2015AJ....149....9M. doi:10.1088/0004-6256/149/1/9. S2CID 119305730. 9.

Mauerhan, Jon; et al. (August 2014). "Multi-epoch spectropolarimetry of SN 2009ip: direct evidence for aspherical circumstellar material". Monthly Notices of the Royal Astronomical Society. 442 (2): 1166–1180. arXiv:1403.4240. Bibcode:2014MNRAS.442.1166M. doi:10.1093/mnras/stu730.

Graham, M. L.; et al. (June 2014). "Clues to the Nature of SN 2009ip from Photometric and Spectroscopic Evolution to Late Times". The Astrophysical Journal. 787 (2): 16. arXiv:1402.1765. Bibcode:2014ApJ...787..163G. doi:10.1088/0004-637X/787/2/163. S2CID 119288029. 163.

Smith, Nathan; et al. (February 2014). "SN 2009ip and SN 2010mc: core-collapse Type IIn supernovae arising from blue supergiants". Monthly Notices of the Royal Astronomical Society. 438 (2): 1191–1207. arXiv:1308.0112. Bibcode:2014MNRAS.438.1191S. doi:10.1093/mnras/stt2269.

Margutti, R.; et al. (January 2014). "A Panchromatic View of the Restless SN 2009ip Reveals the Explosive Ejection of a Massive Star Envelope". The Astrophysical Journal. 780 (1): 38. arXiv:1306.0038. Bibcode:2014ApJ...780...21M. doi:10.1088/0004-637X/780/1/21. S2CID 6574735. 21.

Levesque, Emily M.; et al. (January 2014). "The Peculiar Balmer Decrement of SN 2009ip: Constraints on Circumstellar Geometry". The Astronomical Journal. 147 (1): 9. arXiv:1211.4577. Bibcode:2014AJ....147...23L. doi:10.1088/0004-6256/147/1/23. S2CID 119190791. 23.

Ouyed, Rachid; et al. (December 2013). "SN 2009ip and SN 2010mc as dual-shock Quark-Novae". Research in Astronomy and Astrophysics. 13 (12): 1463–1470. arXiv:1308.3927. Bibcode:2013RAA....13.1463O. doi:10.1088/1674-4527/13/12/007. S2CID 56112524. 1463-1470.

Fraser, Morgan; et al. (August 2013). "SN 2009ip à la PESSTO: no evidence for core collapse yet". Monthly Notices of the Royal Astronomical Society. 433 (2): 1312–1337. arXiv:1303.3453. Bibcode:2013MNRAS.433.1312F. doi:10.1093/mnras/stt813.

Ofek, E. O.; et al. (May 2013). "SN 2009ip: Constraints on the Progenitor Mass-loss Rate". The Astrophysical Journal. 768 (1): 8. arXiv:1303.3894. Bibcode:2013ApJ...768...47O. doi:10.1088/0004-637X/768/1/47. S2CID 35376711. 47.

Mauerhan, Jon C.; et al. (April 2013). "The unprecedented 2012 outburst of SN 2009ip: a luminous blue variable star becomes a true supernova". Monthly Notices of the Royal Astronomical Society. 430 (3): 1801–1810. arXiv:1209.6320. Bibcode:2013MNRAS.430.1801M. doi:10.1093/mnras/stt009.

Pastorello, A.; et al. (April 2013). "Interacting Supernovae and Supernova Impostors: SN 2009ip, is this the End?". The Astrophysical Journal. 767 (1): 19. arXiv:1210.3568. Bibcode:2013ApJ...767....1P. doi:10.1088/0004-637X/767/1/1. S2CID 118444634. 1.

Potashov, M.; et al. (April 2013). "Direct distance measurements to SN 2009ip". Monthly Notices of the Royal Astronomical Society. 431: L98–L101. arXiv:1212.6893. Bibcode:2013MNRAS.431L..98P. doi:10.1093/mnrasl/slt016.

Soker, Noam; Kashi, Amit (February 2013). "Explaining the Supernova Impostor SN 2009ip as Mergerburst". The Astrophysical Journal Letters. 764 (1): 4. arXiv:1211.5388. Bibcode:2013ApJ...764L...6S. doi:10.1088/2041-8205/764/1/L6. S2CID 119298499. L6.

Miller, A. A.; et al. (September 2009). "A Previous Transient Consistent with the Location of SN 2009ip Suggests that SN 2009ip is Not a Supernova". The Astronomer's Telegram. 2183: 1. Bibcode:2009ATel.2183....1M.