CLASS B1359+154 is a
quasar
A quasar is an extremely Luminosity, luminous active galactic nucleus (AGN). It is pronounced , and sometimes known as a quasi-stellar object, abbreviated QSO. This emission from a galaxy nucleus is powered by a supermassive black hole with a m ...
, or quasi-stellar object, that has a
redshift
In physics, a redshift is an increase in the wavelength, and corresponding decrease in the frequency and photon energy, of electromagnetic radiation (such as light). The opposite change, a decrease in wavelength and simultaneous increase in f ...
of 3.235. A group of three foreground galaxies at a redshift of about 1 are behaving as
gravitational lens
A gravitational lens is a distribution of matter (such as a cluster of galaxies) between a distant light source and an observer that is capable of bending the light from the source as the light travels toward the observer. This effect is known ...
es. The result is a rare example of a sixfold multiply imaged quasar.
See also
*
Twin Quasar
*
Einstein Cross
References
External links
Simbad data on QSO B1359+154Image QSO B1359+154Six-Image CLASS Gravitational LensSIMBAD data
Gravitationally lensed quasars
Gravitational lensing
Boötes
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