3C 48

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3C 48
Observation data (Epoch J2000)
Constellation Triangulum
Right ascension 01h 37m 41.1s[1]
Declination +33° 09′ 32″[1]
Redshift 110,024 ± 0 km/s[1]
Type E[1]
Apparent dimensions (V) 0.6´X0.5´
Apparent magnitude (V) 16.2
Notable features First quasar discovered
Other designations
PG 0134+329, QSO B0134+329
See also: Quasar, List of quasars
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3C48 was the first of many faint, starlike quasi-stellar objects which later were named quasars.[2]

3C48 was the first source in the Third Cambridge Catalogue of Radio Sources for which an optical identification was found by Allan Sandage and Thomas Matthews in 1960 through interferometry.[3] Jesse Greenstein and Thomas Matthews found that it had a redshift of 0.367, making it one of the highest redshift sources then known.[4] It was not until 1982 that the surrounding faint galactic "nebulosity" was confirmed to have the same redshift as 3c48, cementing its identification as an object in a distant galaxy.[5] This was also the first solid identification of a quasar with a surrounding galaxy at the same redshift.

[edit] References

  1. ^ a b c d NASA/IPAC Extragalactic Database. Results for 3C 48. Retrieved on 2006-10-26.
  2. ^ Weaver, Kenneth F. (May 1974). "The Incredible Universe". National Geographic (Vol. 145 No. 5): 589-633. 
  3. ^ Matthews, Thomas A.; Sandage, Allan R. (1963). "Optical Identification of 3c 48, 3c 196, and 3c 286 with Stellar Objects" (abstract). Astrophysical Journal 138: 30-56. doi:10.1086/147615. 
  4. ^ Greenstein, J. L.; Matthews, T. A. (1963). "Red-Shift of the Unusual Radio Source 3C48" (abstract). Nature 197: 1041-1042. doi:10.1038/1971041a0. 
  5. ^ Todd A. Boroson & Oke, J. B.. "Detection of the underlying galaxy in the QSO 3C48" (abstract). Nature 296: 397-399. 

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