7C 1428+4218

Basic data :
7C 1428+4218 -- Quasar Origin of the objects types : (Ref) Object type as listed in the reference "Ref" (acronym) Object type linked to the acronym according to the original reference () Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases Other object types: Rad (2020A&A,7C,...), QSO (2010A&A,KODIAQ,...), X (2009A&A,RX,...), Bla (2009A&A,[DGT2001],...), AGN (2016A&A), * (Gaia), gam (INTREF), Opt (SDSS) Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference ICRS coord. (ep=J2000) : 14 30 23.74163471 +42 04 36.4910561 (Radio) [ 0.0928551 0.1224 0 ] A 2020A&A...644A.159C Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference FK4 coord. (ep=B1950 eq=1950) : 14 28 26.70630460 +42 17 53.0947745 [ 0.0928551 0.1224 0 ] Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference Gal coord. (ep=J2000) : 075.86795825597 +64.89462143933 [ 0.0928551 0.1224 0 ] Syntax of proper motions is : "pm-ra pm-dec [error ellipse] quality bibcode" pm-ra : mu-ra*cos(dec) (expressed in the ICRS system in mas/yr) pm-dec : mu-dec (expressed in the ICRS system in mas/yr) [error ellipse] : error major axis and minor axis (in mas), orientation angle (in deg) quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality) bibcode : bibcode of the proper motion reference Proper motions mas/yr : 1.437 -2.754 [0.909 1.105 90] A 2020yCat.1350....0G Syntax of radial velocity (or/and redshift) is : "value [error] (wavelength) quality bibcode" value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options (redshift may be not displayed if the data value is <0 and the database inside value is a radial velocity) [error] : error of the corresponding value displayed before (wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or  '∼'(unknown) quality : flag of quality ( A=best quality -> E=worst quality, {� } =unknown quality) bibcode : bibcode of the value's origin Radial velocity / Redshift / cz : V(km/s) 281620 [132] / z(spectroscopic) 4.65633 [0.00044] / cz 1395932.6 [131.9]    (Opt) C 2015ApJS..219...12A Syntax of parallax is : 'value quality [error] bibcode' value : parallax value quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality) [error] : mean error bibcode : bibcode of the parallax reference Parallaxes (mas): 0.2927 [0.9397] A 2020yCat.1350....0G Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode" filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z (System) : may be AB (default is Vega) flux-value : value of flux or magnitude [error] : error value quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality) MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4]) bibcode : bibcode of the flux reference Fluxes (9) : B 24.43 [~] D 2010A&A...518A..10V V 22.04 [~] D 2010A&A...518A..10V R 20.2 [~] E 2009A&A...495..691M G 20.800926 [0.014700] C 2020yCat.1350....0G u (AB) 24.120 [0.53] D 2014A&A...563A..54P g (AB) 23.3051 [0.1350] D 2020ApJS..250....8L r (AB) 20.9920 [0.0348] C 2020ApJS..250....8L i (AB) 19.1603 [0.0223] C 2020ApJS..250....8L z (AB) 19.3294 [0.0456] C 2020ApJS..250....8L	SIMBAD within arcmin ', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay points in this preview 2MASS DSS SDSSXMMIRACIRISGALEX All (CDSPortal) Send to within arcsec The VizieR photometry tool allows for easy visualization of photometry points extracted around the Simbad position from photometry-enabled catalogues in VizieR. The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding. Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates (SIMBAD quality E or coordinates without reference): 5 to 30 arsec (risky!).
Some important notes on this object about identifications and objects associations. notes: See also Specfind radio flux densities.

7C 1428+4218	IERS B1428+422	1RXS J143023.7+420428	[MGL2009] BZQ J1430+4205
B3 1428+422	INTREF 611	SDSS J143023.74+420436.5	[MGL2009] BZQ J1430+4204
BWE 1428+4218	IVS B1428+422	SDSS J143023.74+420436.4	[MML2015] 5BZQ J1430+4204
7C 142826.80+421756.00	JVAS J1430+420	SDSS J143023.73+420436.5	[VV2000] J143023.7+420437
CLASS B1428+422	JVAS J1430+4204	TGSSADR J143023.7+420436	[VV2003] J143023.7+420437
CLASS J143023.7408+420436.497	JVAS B1428+422	TXS 1428+422	[VV2006] J143023.7+420437
CRATES J143023+420450	KODIAQ J143023+420436	VIPS J14303+4204	[VV2010] J143023.7+420437
FIRST J143023.7+420436	NVSS J143023+420436	WB 1428+4218	[VV98] J143023.7+420437
GB6 J1430+4204	QSO B1428+4217	WN B1428.4+4217	Gaia DR2 1491604311829975296
GB6 B1428+4217	RGB J1430+420	2XMM J143023.7+420436	Gaia DR3 1491604311829975296
GB6 B1428+4218	RGB J1430.4+4204	3XMM J143023.7+420436	Gaia DR1 1491604311829975296
87GB 142825.9+421804	RX J1430.3+4203	[BSF97] J143023.74+420436.5
ICRF J143023.7+420436	RX J1430.4+4204	[DGT2001] B1428+422

References (144 between 1850 and 2024) (Total 144) Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system). Follow new references on this object

Collections of Measurements

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : 7C 1428+4218

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