4C -02.55

Basic data :
4C -02.55 -- 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 (2011MNRAS,KODIAQ,...), gam (2EG,3EG,...), X (2007AJ,2E,...), Bla (2009A&A,[MGL2009],...), AGN (2007AJ), Bz? (2017A&A), * (USNO,Gaia), MIR (WISEA,WISE), BL? (2021MNRAS), G (LEDA), cm (AT20G), UV (GALEX), NIR (2MASS), IR (2MASSI), 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) : 12 32 00.0159535440 -02 24 04.793069304 (Optical) [ 0.0529 0.0364 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 29 25.9054139693 -02 07 31.538125392 [ 0.0529 0.0364 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) : 293.1562065494904 +60.1009623136433 [ 0.0529 0.0364 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 : 0.056 -0.082 [0.068 0.053 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) 183905 [~] / z(emission) 1.043 [~] / cz 312684 [~]    (Opt) C 2017AJ....154..114O 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): 0.0400 [0.0802] A 2018yCat.1345....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 (12) : B 17.41 [~] D 2010A&A...518A..10V V 17.06 [~] D 2010A&A...518A..10V R 16.4 [~] E 2009A&A...495..691M G 16.711214 [0.005289] C 2020yCat.1350....0G J 15.507 [0.067] C 2010AJ....139.2360S H 15.389 [0.104] C 2010AJ....139.2360S K 14.577 [0.111] C 2010AJ....139.2360S u (AB) 17.426 [0.009] B 2015ApJS..219...12A g (AB) 17.113 [0.004] B 2015ApJS..219...12A r (AB) 16.783 [0.005] B 2015ApJS..219...12A i (AB) 16.792 [0.005] B 2015ApJS..219...12A z (AB) 16.787 [0.011] C 2015ApJS..219...12A	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 -02.55	IVS B1229-021	QSO J1232-0224	[BDW2002] q1229-0207
AT20G J123159-022404	1Jy 1229-021	QSO B1229-021	[CMG2008] 186.88-2.23
CRATES J123159-022403	1Jy 1229-02	1RXS J123201.4-022431	[GW2008] CoNFIG 140
Cul 1229-021	KODIAQ J123200-022404	SDSS J123200.01-022404.7	[HB93] 1229-021
2E 2757	LBQS 1229-0207	SQUAD DR1 J123200-022404	[MGL2009] BZQ J1232-0224
2E 1229.4-0207	LEDA 2818116	SWIFT J122819.5-031813	[MML2015] 5BZQ J1232-0224
2EG J1230-0254	2MASS J12320001-0224047	TGSSADR J123200.1-022404	[S77] 208
3EG J1230-0247	2MASSI J1232000-022404	TIC 130637926	[VV2000] J123200.0-022405
EGRc J1233-0318	MRC 1229-021	TXS 1229-021	[VV2003] J123200.0-022405
3FGL J1228.4-0317	NAME BZQ J1236+0224	USNO-A2.0 0825-07765227	[VV2006] J123200.0-022405
4FGL J1228.7-0318	NVSS J123200-022404	VCS1 J1232-0224	[VV2010] J123200.0-022405
FIRST J123159.9-022405	OHIO N -049	VLSSr J123200.0-022402	[VV96] J123200.0-022405
GALEX J123200.0-022404	PKS 1229-021	VLSS J1232.0-0224	[VV98] J123200.0-022405
GLEAM J123200-022406	PKS J1232-0224	VSOP J1232-0224	[WTW94] 1229-021
GRA B1228-02	PKS 1229-02	VSOP J1231-0224	EQS B1229-0207
ICRF J123200.0-022404	PKS 1229-020	WB 1229-0207	Gaia DR3 3693710877159936896
IERS B1229-021	PMN J1231-0224	WISEA J123200.01-022404.7	Gaia DR1 3693710872868290432
INTREF 504	QSO B1229-0207	WISE J123200.01-022404.7	Gaia DR2 3693710877159936896

References (432 between 1850 and 2024) (Total 432) 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 -02.55

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