Spiral galaxy in the constellation Virgo
NGC 5806 is anintermediate spiral galaxy in theconstellation Virgo . It was discovered by German-British astronomerWilliam Herschel on 24 February 1786.[ 5] light-years (21Megaparsecs ) away from the Milky Way.[ 3] NGC 5846 Group .[ 2]
Supernovae and Imposter [ edit ] Supernova SN 2004dg in NGC 5806 Threesupernovae and one supernova imposter have been observed in NGC 5806:
SN 2004dg (Type II , mag. 17.1) was discovered by Associazione Ternana Astrofili on 19 July 2004.[ 6] [ 7] red supergiant .[ 8] SN 2012P (Type IIb , mag. 15.0) was discovered by Fabio Briganti on 22 January 2012.[ 9] [ 10] Type Ib/c , it was later determined to be Type IIb.[ 11] M ☉ .[ 12] iPTF13bvn (Type Ib , mag. 17.2) was discovered by thePalomar Transient Factory on 16 June 2013.[ 13] [ 14] SN Hunt 248 (also known asAT 2014ib ) was discovered by theCatalina Real-time Transient Survey and Stan Howerton on 21 May 2014. It was initially catalogued as a supernova, but was later classified as asupernova imposter . The progenitor was detected as a cool hypergiant with an absolute visual magnitude of −9 and 400,000 times more luminous than the sun. The eruption saw it increase in luminosity to around 80,000,000 L ☉ [ 15] luminous red nova .[ 16] [ 17] ^a b c d e f "Results for object NGC 5806" .NASA/IPAC Extragalactic Database . California Institute of Technology. Retrieved2021-02-21 .^a b c "NGC 5806" .SIMBAD Centre de données astronomiques de Strasbourg . Retrieved2021-02-21 .^a b c d e f Gil de Paz, Armando; et al. (December 2007). "The GALEX Ultraviolet Atlas of Nearby Galaxies".The Astrophysical Journal Supplement Series .173 (2):185– 255.arXiv :astro-ph/0606440 Bibcode :2007ApJS..173..185G .doi :10.1086/516636 .S2CID 119085482 . ^ Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups".Astronomy and Astrophysics Supplement Series .100 : 47.Bibcode :1993A&AS..100...47G . ^ Seligman, Courtney."New General Catalogue objects: NGC 5800 - 5849" .cseligman.com . Retrieved2021-02-21 . ^ Vagnozzi, A.; De Pasquale, D.; Guerri, F.; Guerri, G.; Cristofanelli, M.; Romanelli, S.; Valentini, S.; Yamaoka, H.; Itagaki, K. (July 2004)."Supernova 2004dg" .International Astronomical Union Circular (8375). International Astronomical Union.Bibcode :2004IAUC.8375....1V . ^ "SN 2004dg" .Transient Name Server .IAU . Retrieved22 August 2024 .^ Smartt, S. J.; Eldridge, J. J.; Crockett, R. M.; Maund, J. R. (2009)."The death of massive stars - I. Observational constraints on the progenitors of Type II-P supernovae" .Monthly Notices of the Royal Astronomical Society .395 (3): 1409.arXiv :0809.0403 Bibcode :2009MNRAS.395.1409S .doi :10.1111/j.1365-2966.2009.14506.x S2CID 3228766 . ^ Dimai, A.; Briganti, F.; Brimacombe, J. (2012)."Supernova 2012P in NGC 5806 = PSN J14595904+0153251" .Central Bureau Electronic Telegrams (2993): 1.Bibcode :2012CBET.2993....1D . ^ "SN 2012P" .Transient Name Server .IAU . Retrieved22 August 2024 .^ Arcavi, Iair; Gal-Yam, Avishay; Ben-Ami, Sagi; Fox, Derek;Kasliwal, Mansi ; Nugent, Peter; Howell, D. Andrew; Parrent, Jerod; Horesh, Assaf; Bellm, Eric; PTF Collaboration (2012)."PTF12os / PSN J14595904+0153251 is a Type IIb Supernova" .The Astronomer's Telegram .3881 : 1.Bibcode :2012ATel.3881....1A . ^ Sun, Ning-Chen; Maund, Justyn R.; Crowther, Paul A.; Fang, Xuan; Zapartas, Emmanouil (2021)."Towards a better understanding of supernova environments: A study of SNe 2004dg and 2012P in NGC 5806 with HST and MUSE" .Monthly Notices of the Royal Astronomical Society .504 (2): 2253.arXiv :2011.13667 Bibcode :2021MNRAS.504.2253S .doi :10.1093/mnras/stab994 ^ Cao, Y.; Gorbikov, E.; Arcavi, I.; Ofek, E.; Gal-Yam, A.; Nugent, P.;Kasliwal, M. (2013)."IPTF discovery of a young SN candidate at z=0.00449" .The Astronomer's Telegram .5137 : 1.Bibcode :2013ATel.5137....1C . ^ Fremling, C.; Sollerman, J.; Taddia, F.; Ergon, M.; Fraser, M.; Karamehmetoglu, E.; Valenti, S.; Jerkstrand, A.; Arcavi, I.; Bufano, F.; Elias Rosa, N.; Filippenko, A. V.; Fox, D.; Gal-Yam, A.; Howell, D. A.; Kotak, R.; Mazzali, P.; Milisavljevic, D.; Nugent, P. E.; Nyholm, A.; Pian, E.; Smartt, S. (2016). "PTF12os and iPTF13bvn".Astronomy & Astrophysics .593 : A68.arXiv :1606.03074 doi :10.1051/0004-6361/201628275 .S2CID 54028503 . ^ Mauerhan, Jon C.; Van Dyk, Schuyler D.; Graham, Melissa L.; Zheng, Weikang; Clubb, Kelsey I.; Filippenko, Alexei V.; Valenti, Stefano; Brown, Peter; Smith, Nathan; Howell, D. Andrew; Arcavi, Iair (2015)."SN Hunt 248: A super-Eddington outburst from a massive cool hypergiant" .Monthly Notices of the Royal Astronomical Society .447 (2): 1922.arXiv :1407.4681 Bibcode :2015MNRAS.447.1922M .doi :10.1093/mnras/stu2541 S2CID 11415725 . ^ "Classification certificate for object 2014ib" .Transient Name Server .IAU . Retrieved5 June 2025 .^ Mauerhan, Jon C.; Van Dyk, Schuyler D.; Johansson, Joel; Fox, Ori D.; Filippenko, Alexei V.; Graham, Melissa L. (2018)."The dusty aftermath of SN Hunt 248: Merger-burst remnant?" .Monthly Notices of the Royal Astronomical Society .473 (3): 3765.arXiv :1702.00430 Bibcode :2018MNRAS.473.3765M .doi :10.1093/mnras/stx2500
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