SN 2007uy was a

supernova A supernova (: supernovae or supernovas) is a powerful and luminous explosion of a star. A supernova occurs during the last stellar evolution, evolutionary stages of a massive star, or when a white dwarf is triggered into runaway nuclear fusion ...

that occurred in the

spiral galaxy Spiral galaxies form a galaxy morphological classification, class of galaxy originally described by Edwin Hubble in his 1936 work ''The Realm of the Nebulae''

NGC 2770. It was discovered by Yoji Hirose on December 31, 2007 from

Chigasaki is a Cities of Japan, city located in Kanagawa Prefecture, Japan. , the city had an estimated population of 242,798 and a population density of 6800 people per km2. The total area of the city is . Geography The city is located on the eastern ban ...

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 spectru ...

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 (also known in many languages as Röntgen radiation) is a form of high-energy electromagnetic radiation with a wavelength shorter than those of ultraviolet rays and longer than those of gamma rays. Roughly, X-rays have a wavelength ran ...

to the

radio Radio is the technology of communicating using radio waves. Radio waves are electromagnetic waves of frequency between 3 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connec ...

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

dust Dust is made of particle size, 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 processes, aeolian process), Types of volcan ...

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 extended beams along the axis of rotation. When this greatly accelerated matter in the beam approaches the speed of light, astrophysical jets becom ...

of the type that would be associated with a

gamma-ray burst In gamma-ray astronomy, gamma-ray bursts (GRBs) are extremely energetic events occurring in distant Galaxy, galaxies which represent the brightest and most powerful class of explosion in the universe. These extreme Electromagnetic radiation, ele ...

. While interesting in its own right, SN 2007uy was overshadowed by SN 2008D, a supernova whose burst was observed

serendipitously Serendipity is an unplanned fortunate discovery. The term was coined by Horace Walpole in 1754. The concept is often associated with scientific and technological breakthroughs, where accidental discoveries led to new insights or inventions. Man ...

while SN 2007uy was being studied by

Swift Swift or SWIFT most commonly refers to: * SWIFT, an international organization facilitating transactions between banks ** SWIFT code * Swift (programming language) * Swift (bird), a family of birds It may also refer to: Organizations * SWIF ...

, something unprecedented in astronomy. This second supernova occurred within ten days of the first.

References

External links

Light curves and spectra
on th
Open Supernova Catalog
{{Webarchive, url=https://web.archive.org/web/20160303230459/https://sne.space/ , date=2016-03-03
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 interva ...

announcing the discovery. Supernovae Lynx (constellation) 20071231