en SN 1990U

SN 1990U
Event type	Supernova
	SN Ic
Date	July 27, 1990
Constellation	Pegasus
Right ascension	23h 04m 54.96s
Declination	+12° 18′ 20.1″
Epoch	J2000.0
Galactic coordinates	086.2501 -42.8526
Distance	105,000,000 ly
Redshift	0.00794
Host	NGC 7479
Peak apparent magnitude	16±0.5
Other designations	SN 1990U
	[edit on Wikidata]

SN 1990U was a type Ic supernova event in the nucleus of the galaxy NGC 7479. It was discovered July 27, 1990 by the Berkeley Automated Supernova Search after reaching magnitude 16±0.5.^[1] Initially this was classified as a Type Ib supernova, but the weakness of the neutral helium absorption lines led to a reclassification.^[4]

References

^ ^a ^b ^c ^d Gomez, G.; Lopez, R. (July 1994), "Spectral evolution of the He-Poor supernovae 1990U in NGC 7479 and 1991A in IC 2973", The Astronomical Journal, 108 (1): 195–201, Bibcode:1994AJ....108..195G, doi:10.1086/117058
^ ^a ^b Tsvetkov, D. Yu.; Pavlyuk, N. N.; Bartunov, O. S.; Pskovskii, Yu. P., Sternberg Astronomical Institute Supernova Catalogue, Sternberg Astronomical Institute, Moscow University, retrieved 2015-08-26
^ Modjaz, M.; Kewley, L.; Bloom, J. S.; Filippenko, A. V.; Perley, D.; Silverman, J. M. (April 2011), "Progenitor Diagnostics for Stripped Core-collapse Supernovae: Measured Metallicities at Explosion Sites", The Astrophysical Journal Letters, 731 (1): 6, arXiv:1007.0661, Bibcode:2011ApJ...731L...4M, doi:10.1088/2041-8205/731/1/L4, S2CID 56147580, L4
^ Matheson, Thomas; Filippenko, Alexei V.; Li, Weidong; Leonard, Douglas C.; Shields, Joseph C. (March 2001), "Optical Spectroscopy of Type IB/C Supernovae", The Astronomical Journal, 121 (3): 1648–1675, arXiv:astro-ph/0101119, Bibcode:2001AJ....121.1648M, doi:10.1086/319390, S2CID 119438971

External links

Spectra Archived 2017-10-23 at the Wayback Machine on the Open Supernova Catalog Archived 2016-03-03 at the Wayback Machine
Simbad
Image SN 1990U

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[aj108_1_195-1] Gomez, G.; Lopez, R. (July 1994), "Spectral evolution of the He-Poor supernovae 1990U in NGC 7479 and 1991A in IC 2973", The Astronomical Journal, 108 (1): 195–201, Bibcode:1994AJ....108..195G, doi:10.1086/117058

[SAISC-2] Tsvetkov, D. Yu.; Pavlyuk, N. N.; Bartunov, O. S.; Pskovskii, Yu. P., Sternberg Astronomical Institute Supernova Catalogue, Sternberg Astronomical Institute, Moscow University, retrieved 2015-08-26

[ajl731_1_L4-3] Modjaz, M.; Kewley, L.; Bloom, J. S.; Filippenko, A. V.; Perley, D.; Silverman, J. M. (April 2011), "Progenitor Diagnostics for Stripped Core-collapse Supernovae: Measured Metallicities at Explosion Sites", The Astrophysical Journal Letters, 731 (1): 6, arXiv:1007.0661, Bibcode:2011ApJ...731L...4M, doi:10.1088/2041-8205/731/1/L4, S2CID 56147580, L4

[aj121_3_1648-4] Matheson, Thomas; Filippenko, Alexei V.; Li, Weidong; Leonard, Douglas C.; Shields, Joseph C. (March 2001), "Optical Spectroscopy of Type IB/C Supernovae", The Astronomical Journal, 121 (3): 1648–1675, arXiv:astro-ph/0101119, Bibcode:2001AJ....121.1648M, doi:10.1086/319390, S2CID 119438971

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