SN 2011fe

SN 2011fe[1]
Supernova event on August 25, 2011
Event typeSupernova Edit this on Wikidata
Ia[1]
Date24 August 2011[1]
ConstellationUrsa Major, Big Dipper[1]
Right ascension14h 03m 05.8s[2]
Declination+54° 16′ 25″[2]
EpochJ2000[2]
Distance21 Mly[3]
Redshift0.001208 ±5e-06 Edit this on Wikidata
HostPinwheel Galaxy (M101)[1]
Peak apparent magnitude9.9[4]
Other designationsSN 2011fe
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SN 2011fe, initially designated PTF 11kly, was a Type Ia supernova discovered by the Palomar Transient Factory (PTF) survey on 24 August 2011 during an automated review of images of the Messier 101 from the nights of 22 and 23 August 2011. It was located in Messier 101, the Pinwheel Galaxy, 21 million light years from Earth.[3] It was observed by the PTF survey very near the beginning of its supernova event, when it was approximately 1 million times too dim to be visible to the naked eye. It is the youngest type Ia ever discovered.[5] About 13 September 2011, it reached its maximum brightness of apparent magnitude +9.9[6] which equals an absolute magnitude of about -19, equal to 2.5 billion Suns. At +10 apparent magnitude around 5 September, SN 2011fe was visible in small telescopes. As of 30 September the supernova was at +11 apparent magnitude in the early evening sky after sunset above the northwest horizon. It had dropped to +13.7 as of 26 November 2011.[7]

  1. ^ a b c d e Beatty, Kelly (25 August 2011). "Supernova Erupts in Pinwheel Galaxy". Sky & Telescope. Retrieved 26 August 2011.
  2. ^ a b c Templeton, Matthew (24 August 2011). "Special Notice #250: Possible Type-Ia Supernova in M101". American Association of Variable Star Observers. Archived from the original on 28 December 2013. Retrieved 26 August 2011. {{cite journal}}: Cite journal requires |journal= (help)
  3. ^ a b Shappee, Benjamin; Stanek, Kris (June 2011). "A New Cepheid Distance to the Giant Spiral M101 Based on Image Subtraction of Hubble Space Telescope/Advanced Camera for Surveys Observations". Astrophysical Journal. 733 (2): 124. arXiv:1012.3747. Bibcode:2011ApJ...733..124S. doi:10.1088/0004-637X/733/2/124. S2CID 121792901.
  4. ^ List of supernovae sorted by Magnitude for 2011 (David Bishop)
  5. ^ "Berkeley Scientists Discover an "Instant Cosmic Classic" Supernova". 25 August 2011.
  6. ^ Hartmut Frommert & Christine Kronberg (15 Sep 2011). "Supernova 2011fe in M101". Retrieved 17 Sep 2011.
  7. ^ "[vsnet-recent-sn 2676] SN2011ht recent (Cont'd)".