SN 1000+0216

{{Short description|Supernova in the constellation Sextans}}

{{Supernova

| name = SN 1000+0216

| image = Sn2006gy collapse ill.jpg

| image_scale = 1.3

| caption = The pair instability process that triggered the explosion in SN 1000+0216

| epoch = J2000.0

| type = SLNS-R or SLNS-II ?

| SNRtype =

| host =

| constellation = Sextans

| ra ={{RA|10|00|05.8720}}{{cite simbad|title= [CSG2012] SN J1000+0216|accessdate=2021-01-25}}

| dec = {{DEC|+02|16|23.621}}

| gal =

| discovery = Supernova Legacy Survey

| iauc =

| mag_v =

| distance = z=3.8993 ± 0.0074

| progenitor = initially a 140–250 {{solar mass}} star

| notes =

| names =

}}

SN 1000+0216 was an extremely remote superluminous supernova (SLSN), which occurred in between June and November 2006 in the constellation Sextans. Its peak far-ultraviolet absolute magnitude reached −21.5, which exceeded the total absolute magnitude of its host galaxy. The distance (redshift) to this supernova {{nowrap|z{{=}}3.8993 ± 0.0074}} makes it the most distant supernova observed as of 2012.

The luminosity of SN 1000+0216 evolved slowly over several years as it was still detectable in November 2008. Both the high luminosity and slow decay indicate that the supernova's progenitor was a very massive star. The supernova explosion itself was likely either a pair-instability supernova or a pulsational pair-instability supernova similar to the SN 2007bi event. It also had some similarities to the low redshift SN 2006gy supernova. Overall classification of SN 1000+0216 remains uncertain.{{Cite journal | last1 = Cooke | first1 = J. | last2 = Sullivan | first2 = M. | last3 = Gal-Yam | first3 = A. | last4 = Barton | first4 = E. J. | last5 = Carlberg | first5 = R. G. | last6 = Ryan-Weber | first6 = E. V. |author6-link=Emma Ryan-Weber| last7 = Horst | first7 = C. | last8 = Omori | first8 = Y. | last9 = Díaz | first9 = C. G. | doi = 10.1038/nature11521 | title = Superluminous supernovae at redshifts of 2.05 and 3.90 | journal = Nature | volume = 491 | issue = 7423 | pages = 228–231 | year = 2012 | pmid = 23123848| bibcode = 2012Natur.491..228C |arxiv = 1211.2003 | s2cid = 4397580 }}