1999MNRAS.308L...6F

Query : 1999MNRAS.308L...6F

1999MNRAS.308L...6F - Mon. Not. R. Astron. Soc., 308, L6-L10 (1999/September-1)

Variability of the extreme z=4.72 blasar, GB 1428+4217.

FABIAN A.C., CELOTTI A., POOLEY G., IWASAWA K., BRANDT W.N., McMAHON R.G. and HOENIG M.D.

Abstract (from CDS):

We report X-ray and radio variability of GB 1428+4217 which confirm its blazar nature. IR observations reveal a powerful optical-UV component, not obscured by dust, which is suggestive of the presence of a billion solar mass black hole, already formed by z∼5. A detailed comparison of the broad-band spectral properties of GB 1428+4217 with those of nearby blazars shows it to be extreme, but nevertheless consistent with the trend found for nearby sources.

Abstract Copyright: 1999 RAS

Journal keyword(s): quasars: individual: GB 1428+4217 - X-rays: galaxies - X-rays: general

CDS comments: GB 1428+4217 = GB6 B1428+4217

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2924 2
2 QSO B1026-084 Bla 10 28 38.79646593 -08 44 38.5362663     21.00 19.6   ~ 77 1
3 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
4 7C 1428+4218 Bla 14 30 23.74163471 +42 04 36.4910561   24.43 22.04 20.2   ~ 157 1
5 QSO B1508+572 QSO 15 10 02.92237321 +57 02 43.3759220   22.73 21.38 19.23   ~ 223 1

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