SN 2007uy was a

supernova A supernova is a powerful and luminous explosion of a star. It has the plural form supernovae or supernovas, and is abbreviated SN or SNe. This transient astronomical event occurs during the last evolutionary stages of a massive star or when ...

that occurred in the

spiral galaxy Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work ''The Realm of the Nebulae''NGC 2770 NGC 2770 is a spiral galaxy in the northern constellation of Lynx (constellation), Lynx, near the northern constellation border with Cancer (constellation), Cancer. It was discovered by German-born astronomer William Herschel on December 7, 1785. ...

. It was discovered by Yoji Hirose on December 31, 2007 from Chigasaki city in Japan, approximately four days after the explosion. The position of the supernova was offset east and south of the galaxy's nucleus, near a star-forming region. It was identified as a

Type Ib supernova Type Ib and Type Ic supernovae are categories of supernovae that are caused by the stellar core collapse of massive stars. These stars have shed or been stripped of their outer envelope of hydrogen, and, when compared to the spectrum ...

from its spectrum a week before reaching maximum, and appeared the most similar to SN 2004gq. Emissions from SN 2007uy were detected from the

X-ray An X-ray, or, much less commonly, X-radiation, is a penetrating form of high-energy electromagnetic radiation. Most X-rays have a wavelength ranging from 10 picometers to 10 nanometers, corresponding to frequencies in the range 30&nb ...

to the

radio Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmit ...

band. The light from this event was heavily reddened due to intervening

dust Dust is made of fine particles of solid matter. On Earth, it generally consists of particles in the atmosphere that come from various sources such as soil lifted by wind (an aeolian process), volcanic eruptions, and pollution. Dust in homes ...

in the host galaxy. This energetic explosion released in energy and ejected a mass of . The progenitor was likely a massive star that had been stripped of its hydrogen envelope by a binary companion. There is no radio evidence of a

relativistic jet An astrophysical jet is an astronomical phenomenon where outflows of ionised matter are emitted as an extended beam along the axis of rotation. When this greatly accelerated matter in the beam approaches the speed of light, astrophysical jets bec ...

of the type that would be associated with a gamma-ray burst. While interesting in its own right, SN 2007uy was overshadowed by

SN 2008D SN 2008D is a supernova detected with NASA's '' Swift'' X-ray telescope. The explosion of the supernova precursor star, in the spiral galaxy NGC 2770 (88 million light years away (27 Mpc), was detected on January 9, 2008, by Carnegie-Princeton fe ...

, a supernova whose burst was observed serendipitously while SN 2007uy was being studied by Swift, something unprecedented in astronomy. This second supernova occurred within ten days of the first.

References

{{reflist, refs= {{cite journal , title=Supernova 2007uy in NGC 2770 , last1=Nakano , first1=S. , last2=Kadota , first2=K. , last3=Itagaki , first3=K. , last4=Corelli , first4=P. , display-authors=1 , journal=IAU Circular , volume=8908 , number=2 , date=January 2008 , page=2 , editor1-last=Green , editor1-first=D. W. E. , bibcode=2008IAUC.8908....2N {{cite journal , title=Supernova 2007uy in NGC 2770 , last1=Blondin , first1=S. , last2=Calkins , first2=M. , journal=Central Bureau Electronic Telegrams , volume=1191 , number=2 , date=January 2008 , page=2 , editor1-last=Green , editor1-first=D. W. E. , bibcode=2008CBET.1191....2B {{cite journal , title=Asiago Supernova Catalogue , last1=Barbon , first1=R. , last2=Buondi , first2=V. , last3=Cappellaro , first3=E. , last4=Turatto , first4=M. , display-authors=1 , date=2008 , journal=CDS/ADC Collection of Electronic Catalogues , bibcode=2008yCat....1.2024B {{cite news , title=NASA's Swift Satellite Catches First Supernova in the Act of Exploding , publisher=Goddard Space Flight Center , date=May 21, 2008 , url=https://www.nasa.gov/centers/goddard/news/topstory/2008/swift_supernova.html , access-date=2021-12-10 {{cite conference , display-authors=1 , title=The beauty of resolution: The SN Ib factory NGC 2770 spatially resolved , last1=Thöne , first1=C. C. , last2=Christensen , first2=L. , last3=Gorosabel , first3=J. , last4=de Ugarte Postigo , first4=A. , conference=Galaxies in 3D across the Universe, Proceedings of the International Astronomical Union, IAU Symposium , volume=309 , page=169-170 , date=February 2015 , doi=10.1017/S1743921314009594 , bibcode=2015IAUS..309..169T , doi-access=free {{cite journal , title=SN 2007uy - metamorphosis of an aspheric Type Ib explosion , last1=Roy , first1=Rupak , last2=Kumar , first2=Brijesh , last3=Maund , first3=Justyn R. , last4=Schady , first4=Patricia , last5=Olivares , first5=E. , last6=Malesani , first6=Daniele , last7=Leloudas , first7=Giorgos , last8=Nandi , first8=Sumana , last9=Tanvir , first9=Nial , last10=Milisavljevic , first10=Dan , last11=Hjorth , first11=Jens , last12=Misra , first12=Kuntal , last13=Kumar , first13=Brajesh , last14=Pandey , first14=S. B. , last15=Sagar , first15=Ram , last16=Chandola , first16=H. C. , journal=Monthly Notices of the Royal Astronomical Society , volume=434 , issue=3 , pages=2032–2050 , date=September 2013 , display-authors=1 , doi=10.1093/mnras/stt1148 , arxiv=1306.5389 , bibcode=2013MNRAS.434.2032R {{cite journal , title=Detailed Radio View on Two Stellar Explosions and Their Host Galaxy: XRF 080109/SN 2008D and SN 2007uy in NGC 2770 , last1=van der Horst , first1=A. J. , last2=Kamble , first2=A. P. , last3=Paragi , first3=Z. , last4=Sage , first4=L. J. , last5=Pal , first5=S. , last6=Taylor , first6=G. B. , last7=Kouveliotou , first7=C. , last8=Granot , first8=J. , last9=Ramirez-Ruiz , first9=E. , last10=Ishwara-Chandra , first10=C. H. , last11=Oosterloo , first11=T. A. , last12=Wijers , first12=R. A. M. J. , last13=Wiersema , first13=K. , last14=Strom , first14=R. G. , last15=Bhattacharya , first15=D. , last16=Rol , first16=E. , last17=Starling , first17=R. L. C. , last18=Curran , first18=P. A. , last19=Garrett , first19=M. A. , display-authors=1 , journal=The Astrophysical Journal , volume=726 , issue=2 , id=99 , pages=12 , date=January 2011 , doi=10.1088/0004-637X/726/2/99 , arxiv=1011.2521 , bibcode=2011ApJ...726...99V , s2cid=17719552

External links

Light curves and spectra
on th
Open Supernova Catalog

IAUC 8908

IAU Circular The International Astronomical Union Circulars (IAUCs) are notices that give information about astronomical phenomena. IAUCs are issued by the International Astronomical Union's Central Bureau for Astronomical Telegrams (CBAT) at irregular interval ...

announcing the discovery. Supernovae Lynx (constellation) 20071231