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3C 273 is a quasar located at the center of a giant elliptical galaxy in the constellation of Virgo. It was the first quasar ever to be identified and is the visually brightest quasar in the sky as seen from Earth, with an apparent visual magnitude of 12.9. [2] The derived distance to this object is 749 megaparsecs (2.4 billion light-years).
The first true quadruple quasar system was discovered in 2015 at a redshift z = 2.0412 and has an overall physical scale of about 200 kpc (roughly 650,000 light-years). [74] A multiple-image quasar is a quasar whose light undergoes gravitational lensing, resulting in double, triple
QSO J0529−4351 (SMSS J052915.80–435152.0) is a quasar, 12 billion light-years away in the Pictor constellation, notable for being the most luminous object ever observed at roughly 500 trillion times the luminosity of the Sun. The black hole at its centre has a mass of approximately 17 billion solar masses, and accretes around one solar mass ...
"What is observed over time is the quasar brightness. This fluctuates up and down, the result of lots of complicated physics in the disk of matter spinning around a black hole at almost light speed.
List of quasars. This is a list of exceptional quasars for characteristics otherwise not separately listed. Quasar. Notes. Twin Quasar. Associated with a possible planet microlensing event in the gravitational lens galaxy that is doubling the Twin Quasar's image. QSR J1819+3845. Proved interstellar scintillation due to the interstellar medium.
4C +09.17 is classified a radio-loud quasar, measured from its narrow-line region, with a bolometric luminosity of 2.88 × 10 46 erg s −1. [4] It has a one-sided jet extending southwest, with its bright core emission associated with the quasar's optical emission location. 4C +09.17 is also very bright at infrared wavelengths as observed by Podigachoski et al. (2015).
QSO J0439+1634, [4] often referred to by just its coordinates, J0439+1634 or J043947.08+163415.7, [1] is a superluminous quasar, and was, until 20 February 2024, (when it was superseded by QSO J0529-4351) considered the brightest quasar in the early universe with a redshift of z = 6.51. [5][2][6][7] It is approximately 12.873 billion light ...
APM 08279+5255 is a very distant, broad absorption line quasar located in the constellation Lynx. It is magnified and split into multiple images by the gravitational lensing effect of a foreground galaxy through which its light passes. It appears to be a giant elliptical galaxy with a supermassive black hole and associated accretion disk.