SN 2013ej

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

{{Supernova

| name = SN 2013ej

| epoch = J2000.0

| type = SN II-P

| SNRtype =

| host = Messier 74 (NGC 628)

| constellation = Pisces

| ra = {{RA|01|36|48.16}}

| dec = {{DEC|+15|45|31.0}}

| gal =

| discovery = 25 July 2013

| mag_v = 12.1

| distance = {{val|30|6|ul=Mly}}

| progenitor = ?

| progenitor_type = Red supergiant

| b-v = Unknown

| notes = N/A

}}

SN 2013ej is a Type II-P supernova in the nearby spiral galaxy Messier 74 (NGC 628).{{Cite journal|year=2013|title=The first month of evolution of the slow-rising Type IIP SN 2013ej in M74|journal=MNRAS Letters|volume=438|pages=L101–L105|doi=10.1093/mnrasl/slt171 |doi-access=free |last1=Valenti |first1=S. |last2=Sand |first2=D. |last3=Pastorello |first3=A. |last4=Graham |first4=M. L. |last5=Howell |first5=D. A. |last6=Parrent |first6=J. T. |last7=Tomasella |first7=L. |last8=Ochner |first8=P. |last9=Fraser |first9=M. |last10=Benetti |first10=S. |last11=Yuan |first11=F. |last12=Smartt |first12=S. J. |last13=Maund |first13=J. R. |last14=Arcavi |first14=I. |last15=Gal-Yam |first15=A. |last16=Inserra |first16=C. |last17=Young |first17=D. |arxiv=1309.4269 }} It was discovered by the Lick Observatory Supernova Search on July 25, 2013, with the 0.76 m Katzman Automatic Imaging Telescope, with pre-discovery images having been taken the day before.{{Cite web|url=http://www.rochesterastronomy.org/sn2013/sn2013ej.html|title=Supernovae 2013ej in M74|date=16 May 2016|website=Rochester Astronomy|access-date=4 April 2017}}

Supernova 2013ej was noted for being as bright as 12th magnitude.{{Cite news|url=https://www.skyandtelescope.com/astronomy-news/observing-news/bright-supernova-in-m74/|title=Bright supernova in M74|date=2013-07-29|website=Sky & Telescope|language=en-US|access-date=2019-11-22}}

SN 2013ej was compared to supernovas SN 2004et and SN 2007od.{{cite journal|last1=Huang|first1=Fang|last2=Wang|first2=Xiaofeng|last3=Zhang|first3=Jujia|last4=Brown|first4=Peter J.|last5=Zampieri|first5=Luca|last6=Pumo|first6=Maria Letizia|last7=Zhang|first7=Tianmeng|last8=Chen|first8=Juncheng|last9=Mo|first9=Jun|last10=Zhao|first10=Xulin|date=2015-04-02|title=SN 2013ej in M74: A Luminous and Fast-declining Type II-P Supernova|journal=The Astrophysical Journal|volume=807|issue=1|pages=59|arxiv=1504.00446|bibcode=2015ApJ...807...59H|doi=10.1088/0004-637X/807/1/59|s2cid=118073790}} Based on various observations it has been theorized that the supernova originated from a red supergiant star that went supernova.

SN 2013ej is one of the brightest Type II supernova detected to-date in NGC 628.{{Cite journal|last1=Bose|first1=Subhash|last2=Sutaria|first2=Firoza|last3=Kumar|first3=Brijesh|last4=Duggal|first4=Chetna|last5=Misra|first5=Kuntal|last6=Brown|first6=Peter J.|last7=Singh|first7=Mridweeka|last8=Dwarkadas|first8=Vikram|last9=York|first9=Donald G.|last10=Chakraborti|first10=Sayan|last11=Chandola|first11=H. C.|date=2015-06-16|title=SN 2013ej: A TYPE IIL SUPERNOVA WITH WEAK SIGNS OF INTERACTION|journal=The Astrophysical Journal|language=en|volume=806|issue=2|pages=160|doi=10.1088/0004-637x/806/2/160|issn=1538-4357|bibcode=2015ApJ...806..160B|arxiv=1504.06207|s2cid=118449547}}