4C 21.35

Basic data :
4C 21.35 -- Blazar 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 (2010ApJ,KODIAQ,...), gam (2012ApJS,2EG,...), Bla (2009A&A,[MGL2009],...), X (2009A&A,PBC,...), AGN (2011ApJ,[SRC2012b]), MIR (WISEA,WISE), Opt (LAMOST,SDSS), Bz? (2013ApJS), G (LEDA), * (Gaia), UV (PG), NIR (2MASS), IR (2MASSI) 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) : 12 24 54.4583146056 +21 22 46.385507388 (Optical) [ 0.0283 0.0260 90 ] A 2020yCat.1350....0G 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) : 12 22 23.4144239478 +21 39 23.145362945 [ 0.0283 0.0260 90 ] 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) : 255.0734128271474 +81.6597869214586 [ 0.0283 0.0260 90 ] 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 : 0.086 0.221 [0.033 0.032 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) 103585 [18] / z(spectroscopic) 0.43383 [0.00006] / cz 130059.0 [18.0]    (Opt) C 2012ApJS..203...21A Syntax of morphological type is : mtype quality bibcode mtype : Hubble morphological class (spirals, ellipticals, etc) quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality) bibcode : bibcode of the morphological type reference Morphological type: E D ~ 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 (12) : B 17.56 [~] D 2010A&A...518A..10V V 17.50 [~] D 2010A&A...518A..10V R 18.2 [~] E 2009A&A...495..691M G 14.953235 [0.023933] C 2020yCat.1350....0G J 14.924 [0.036] C 2010AJ....139.2360S H 13.998 [0.039] C 2010AJ....139.2360S K 13.071 [0.027] C 2010AJ....139.2360S u (AB) 16.039 [0.005] B 2020ApJS..249....3A g (AB) 15.882 [0.003] B 2020ApJS..249....3A r (AB) 16.074 [0.004] B 2020ApJS..249....3A i (AB) 16.060 [0.004] B 2020ApJS..249....3A z (AB) 15.850 [0.006] B 2020ApJS..249....3A	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. Erroneously named PG 1222+216 in various references

4C 21.35	IERS B1222+216	QSO J1224+21	WISE J122454.46+212246.4
BWE 1222+2139	INTREF 493	QSO B1222+216	9Y-MST J1224+2123
CLASS J122454.4598+212246.438	IVS B1222+216	QSO B1222+2139	[GW2008] CoNFIG 134
CRATES J122455+212245	JVAS J1224+2122	RGB J1224.9+2122	[HB93] 1222+216
2EG J1224+2155	JVAS B1222+216	RX J1224.9+2122	[MGL2009] BZQ J1224+2122
3EG J1224+2118	KODIAQ J122454+212246	1RXS J122454.9+212252	[MML2015] 5BZQ J1224+2122
EGR J1225+2115	LAMOST J122454.46+212246.4	S3 1222+21	[S77] 204
1FGL J1224.7+2121	LAMOST J122454.46+212246.3	SDSS J122454.46+212246.3	[SRC2012b] J1224+2122
2FGL J1224.9+2122	LEDA 2819691	SDSS J122454.46+212246.4	[VV2000] J122454.5+212246
3FGL J1224.9+2122	2MASS J12245446+2122463	SDSS J122454.45+212246.3	[VV2003] J122454.5+212246
4FGL J1224.9+2122	2MASSI J1224544+212246	SWIFT J1224.9+2118	[VV2006] J122454.5+212246
1FHL J1224.8+2122	MITG J122455+2122	SWIFT J1224.9+2122	[VV2010] J122454.5+212245
2FHL J1224.7+2124	NRAO 1222+21	SWIFT J1224.8+2119	[VV96] J122454.7+212247
3FHL J1224.9+2122	NVSS J122454+212247	TeV J1224+213	[VV98] J122454.7+212247
FIRST J122454.4+212246	OHIO N 238	TIC 135140682	[ZEH2003] RX J1224.9+2122 1
1FLE J1224+2118	PBC J1224.8+2122	TXS 1222+216	Gaia DR3 3952378340577139456
GB6 B1222+2139	PG 1222+217	VCS1 J1224+2122	Gaia DR1 3952378336281545344
87GB 122224.2+213918	PKS 1222+21	VSOP J1224+2122	Gaia DR2 3952378340577139456
GRO J1222+22	PKS J1224+2122	WB 1222+2139
ICRF J122454.4+212246	PKS 1222+216	WISEA J122454.46+212246.4

References (668 between 1850 and 2023) (Total 668) 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 21.35

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