{{Short description|Supernova in the constellation Boötes}} {{Infobox supernova | name = SN 2005bc | image = SN2005bc.JPG | caption = SN 2005bc just over a week after peak brightness | event_type = Supernova | class = Type Ia<ref name=Barbon_et_al_2008/> | constellation = [[Boötes]] | ra = {{RA|14|37|14.78}}<ref name=Barbon_et_al_2008/> | dec = {{DEC|+38|27|23.1}}<ref name=Barbon_et_al_2008/> | epoch = [[J2000.0]] | gal = Long 66.76°<br>Lat 65.17° | distance = {{Convert|39.63|Mpc|Mly|abbr=on|lk=on|order=flip}}<ref name=Tully_et_al_2016/> | redshift = | host = [[NGC 5698]]<ref name=Barbon_et_al_2008/> | progenitor_type = [[white dwarf]] | peak = +16.6<ref name=Barbon_et_al_2008/> |discovery={{circa}} 129.3 million years ago <br> (detected 2 April 2005 by Tim Puckett and L. Cox<ref name=Barbon_et_al_2008/>)}}
'''SN 2005bc''' was a [[Type Ia supernova]]<ref name=Modjaz_et_al_2005/> occurring in the [[barred spiral galaxy]] [[NGC 5698]],<ref name=Barbon_et_al_2008/> located in the northern [[constellation]] of [[Boötes]]. SN 2005bc was discovered on 2 April 2005 by LOSS and independently by Tim Puckett and L. Cox.<ref name=Burket_et_al_2005/> It was positioned at an offset of {{val|4.6|ul=arcsecond}} east and {{val|7.5|u=arcsecond}} north of the galactic nucleus.<ref name=Barbon_et_al_2008/> The [[supernova]] was at [[Apparent magnitude|magnitude]] 16.4 at discovery, and quickly rose to a peak magnitude of around 15.3 (in visible light) just over a week after discovery. It showed an expansion velocity of {{val|12000|u=km/s|fmt=commas}}.<ref name=Modjaz_et_al_2005/> By mid-May, the supernova had faded to 17th magnitude.
The host galaxy, NGC 5698, along with the supernova lie approximately 129 million [[light-year]]s (~40 million [[parsec]]s) from Earth.<ref name=Tully_et_al_2016/> As the supernova was of Type Ia, its progenitor star was a [[Compact star|compact]] [[white dwarf]] star that exceeded the [[Chandrasekhar limit]].
==References== <references> <ref name=Burket_et_al_2005>{{citation | title=Supernovae 2005az, 2005bb, and 2005bc | last1=Burket | first1=J. | last2=Pugh | first2=H. | last3=Li | first3=W. | last4=Puckett | first4=T. | last5=Cox | first5=L. | display-authors=1 | journal=IAU Circular | date=April 2005 | volume=8504 | number=2 | page=2 | editor1-last=Green | editor1-first=D. W. E. | bibcode=2005IAUC.8504....2B | postscript=. }}</ref>
<ref name=Modjaz_et_al_2005>{{citation | title=Supernova 2005bc in NGC 5698 | last1=Modjaz | first1=M. | last2=Kirshner | first2=R. | last3=Challis | first3=P. | last4=Nutzman | first4=P. | journal=Central Bureau Electronic Telegrams | volume=132 | number=1 | date=April 2005 | page=1 | editor1-last=Green | editor1-first=D. W. E. | bibcode=2005CBET..132....1M | postscript=. }}</ref>
<ref name=Barbon_et_al_2008>{{citation | title=Asiago Supernova Catalogue | display-authors=1 | last1=Barbon | first1=R. | last2=Buondi | first2=V. | last3=Cappellaro | first3=E. | last4=Turatto | first4=M. | work=CDS/ADC Collection of Electronic Catalogues | date=2008 | volume=1 | bibcode=2008yCat....1.2024B | postscript=. }}</ref>
<ref name=Tully_et_al_2016>{{citation | last1=Tully | first1=R. Brent | last2=Courtois | first2=Hélène M. | last3=Sorce | first3=Jenny G. | display-authors=1 | title=Cosmicflows-3 | journal=The Astronomical Journal | volume=152 | issue=2 | id=50 | pages=21 | date=August 2016 | doi=10.3847/0004-6256/152/2/50 | bibcode=2016AJ....152...50T | arxiv=1605.01765 | s2cid=250737862 | postscript=. | doi-access=free }}</ref> </references>
==External links== * [http://cbat.eps.harvard.edu/iauc/08500/08504.html#Item2 IAUC 8504]
{{Supernovae}} {{Boötes}}
[[Category:Supernovae]] [[Category:Astronomical objects discovered in 2005|20050402]] [[Category:2005 in science]] [[Category:Boötes]]
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