SN 2023ixf

SN 2023ixf is a type II (core collapse) supernova located in the Pinwheel Galaxy (M101). It was first observed on 19 May 2023 by Koichi Itagaki and immediately classified as a type II supernova.[2] Initial magnitude at discovery was 14.9.[2] After discovery, the Zwicky Transient Facility project found a precovery image of the supernova at magnitude 15.87 two days before discovery.[7] The supernova is about 21 million light-years from Earth and is expected to have left behind either a neutron star or black hole based on current stellar evolution models.

SN 2023ixf
Supernova 2023ixf as seen on 20 May 2023 05:58 UT
Type II (single massive star)
Date19 May 2023 17:27[1]
ConstellationUrsa Major
Right ascension14h 03m 38.6s[2]
Declination+54° 18′ 42.1″[2]
EpochJ2000
Distance21 Mly (6.4 Mpc)[2]
HostPinwheel Galaxy (M101)
NGC 5461[3]
ProgenitorSupergiant (M=–4.66)[4]
Peak apparent magnitude10.8 (as of 22 May 2023)[5][6]

The supernova is located near a prominent HII region, NGC 5461, in an outer spiral arm of the bright galaxy.[3]

By 22 May 2023 SN 2023ixf had brightened to about magnitude 11.[5][6] It can be seen in telescopes as small as 114 mm (4.5 in)[3] and should remain visually visible with backyard telescopes for a few months.[8] The last supernova this close to Earth was SN 2014J in Messier 82, roughly 12 million light-years from Earth. The supernova started to fade on around 10 June 2023.[9]

Recent supernovae as bright as SN 2023ixf
Supernova Galaxy Distance Type Peak
apmag
SN 2023ixfPinwheel Galaxy (M101)21 Mly (6.4 Mpc)II10.8
SN 2014JM82 (Cigar Galaxy)12 Mly (3.7 Mpc)Ia10.1[10]
SN 2011fePinwheel Galaxy (M101)21 Mly (6.4 Mpc)Ia9.9[11]

Before becoming a supernova, the progenitor star is believed to have been a supergiant with an absolute magnitude in the near-infrared (814nm) of MF814W = –4.66.[4]

References
  1. "Discovery certificate for object 2023ixf". Transient Name Server. Archived from the original on 2023-05-21. Retrieved 2023-05-22.
  2. "AstroNote 2023-119". Transient Name Server. Archived from the original on 2023-05-20. Retrieved 2023-05-20.
  3. Bob King (2023-05-22). "Bright Supernova Blazes in M101, the Pinwheel Galaxy". Sky & Telescope. Archived from the original on 2023-05-22. Retrieved 2023-05-23.
  4. "Detection of candidate progenitor of SN 2023ixf in HST archival data". Astronomer's Telegram. 2023-05-23. Archived from the original on 2023-05-24. Retrieved 2023-05-24.
  5. David Bishop. "2023ixf (ZTF23aaklqou)". Archived from the original on 2023-05-21. Retrieved 2023-05-22.
  6. "2023-141: Amateur Follow-up observations in bands V & B". Transient Name Server.
  7. "ZTF Pre-Discovery Forced Photometry of SN 2023ixf". Transient Name Server.
  8. Kelly Kizer Whitt (2023-05-20). "New supernova! Closest in a decade". Earthsky. Archived from the original on 2023-05-20. Retrieved 2023-05-21.
  9. "AAVSO Magnitude Plot". AAVSO. Archived from the original on 2023-06-10.
  10. List of supernovae sorted by Magnitude for 2014 Archived 2023-05-30 at the Wayback Machine (David Bishop)
  11. List of supernovae sorted by Magnitude for 2011 Archived 2023-05-30 at the Wayback Machine (David Bishop)


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