4C 69.21

Basic data :
4C 69.21 -- 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 (2014ApJS,4C,...), QSO (2005ApJ,QSO,...), AGN (CGRaBS,[VV2000c],...), Bla (2009A&A,[MGL2009],...), X (2009A&A,RX), MIR (WISEA,WISE), Bz? ([SRM2005]), G (LEDA), * (Gaia) 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) : 16 42 07.84851261 +68 56 39.7563611 (Radio) [ 0.0311491 0.0314 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) : 16 42 18.09035232 +69 02 13.3202811 [ 0.0311491 0.0314 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) : 100.70588302218 +36.62135076797 [ 0.0311491 0.0314 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 : -0.028 -0.924 [0.876 1.094 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) 152202 [~] / z(spectroscopic) 0.75 [~] / cz 224844 [~]    (Opt) D 2017ApJS..233....3T 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 (3) : B 19.723 [~] D 2010ApJ...712..303C R 19.219 [~] D 2010ApJ...712..303C G 20.427877 [0.020122] C 2020yCat.1350....0G	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.

4C 69.21	JVAS B1642+690	RGB J1642.1+6856	[DSL2000] 1641+691
BWE 1642+6902	JVAS J1642+6856	RGB J1642+689	[HB93] 1642+690
6C 164218+690201	JVAS J1642+689	RORF 1642+690	[MGL2009] BZQ J1642+6856
7C 1642+6902	1Jy 1642+69	RX J1642.1+6856	[MML2015] 5BZQ J1642+6856
7C 164218.10+690212.00	1Jy 1642+690	S4 1642+69	[P82] 1642+690
CGRaBS J1642+6856	LEDA 2821780	S4 1642+690	[SRM2005] J164207.85+685639.7
CJ1 1642+690	LRWR 34	TXS 1642+690	[VV2000c] J164207.8+685640
CJF B1642+690	MY 164220.2+690202.8	VLSS J1642.1+6856	[VV2003c] J164207.8+685640
CLASS J164207.8510+685639.746	MY 164220.2+685629.4	VSOP J1642+6856	[VV2006c] J164207.8+685640
GB6 B1642+6902	NVSS J164207+685638	WB 1642+6902	[VV2010] J164207.8+685640
87GB 164216.9+690220	PCCS1 030 G100.68+36.62	WISEA J164207.84+685639.8	[VV98c] J164207.8+685640
ICRF J164207.8+685639	QSO J1642+6856	WISE J164207.84+685639.8	Gaia DR3 1648854540688432384
IERS B1642+690	QSO B1642+690	WMAP J1642+6856	Gaia DR1 1648854540688432384
IVS B1642+690	QSO B1642+69	WN B1642.3+6902	Gaia DR2 1648854540688432384

References (295 between 1850 and 2023) (Total 295) 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 : 4C 69.21

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