4C -01.21

Basic data :
4C -01.21 -- 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 (2020A&A,4C,...), QSO (2010ApJ,[VV2000],...), Bla (2009A&A,[MGL2009],...), gam (1FGL,2FGL,...), AGN (2011ApJ), * (USNO,Gaia), MIR (WISEA,WISE), Q? (2021MNRAS), AG? (2022ApJS), cm (AT20G), UV (GALEX), 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) : 10 10 51.66669216 -02 00 19.5745005 (Radio) [ 0.0761538 0.1754 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) : 10 08 18.93933529 -01 45 31.4440535 [ 0.0761538 0.1754 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) : 243.42951287599 +41.60220083335 [ 0.0761538 0.1754 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 : 0.018 0.326 [0.200 0.182 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) 168327 [~] / z(~) 0.887 [~] / cz 265916 [~]    D 2001AJ....121.2843B 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 18.99 [~] D 2010A&A...518A..10V V 18.63 [~] D 2010A&A...518A..10V R 19.1 [~] E 2009A&A...495..691M G 18.556704 [0.015581] C 2020yCat.1350....0G J (AB) 17.753 [0.015] C 2013ApJS..206....4K H (AB) 17.689 [0.018] C 2013ApJS..206....4K K (AB) 17.360 [0.018] C 2013ApJS..206....4K u (AB) 19.231 [0.025] C 2012ApJS..203...21A g (AB) 18.864 [0.009] B 2009ApJS..182..543A r (AB) 18.682 [0.01] B 2009ApJS..182..543A i (AB) 18.682 [0.013] C 2009ApJS..182..543A z (AB) 18.651 [0.044] C 2012ApJS..203...21A	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 -01.21	ICRF J101051.6-020019	SDSS J101051.66-020019.6	[LO95] 1008-017B
AT20G J101051-020019	IERS B1008-017	SPASS J101051-020148	[MGL2009] BZQ J1010-0200
BWE 1008-0146	IVS B1008-017	TGSSADR J101051.8-020018	[MML2015] 5BZQ J1010-0200
CRATES J101052-020057	MRC 1008-017	TGSSADR J101051.5-020227	[OWH82] 100820.2-014557
CRTS CSS090214 J101052-020020	NAICGB 1008-017	USNO-A2.0 0825-07117777	[VV2000] J101051.6-020020
Cul 1008-017	NAIC 1008-017	VCS1 J1010-0200	[VV2003] J101051.6-020020
DW 1008-01	NVSS J101051-020019	VLSSr J101052.8-020007	[VV2006] J101051.6-020020
1FGL J1011.0-0156	OHIO L -015	VLSSr J101052.1-020217	[VV2010] J101051.6-020020
2FGL J1010.8-0158	PKS 1008-017	VLSS J1010.8-0202	[VV98] J101051.6-020020
3FGL J1010.8-0158	PKS J1010-0200	VLSS J1010.8-0200	[WHL2012b] J1011-0200
4FGL J1010.8-0158	PKS 1008-01	WB 1008-0146	[WPW2003] J1010-0200
GALEX J101051.7-020019	PMN J1010-0200	WISEA J101051.66-020019.6	Gaia DR3 3829026570598041856
GLEAM J101051-020137	2QZ J101051.6-020020	WISE J101051.67-020019.5	Gaia DR1 3829026566307970944
GRA B1008-01	RFC J1010-0200	WISE J101051.66-020019.6	Gaia DR2 3829026570598041856

References (88 between 1850 and 2024) (Total 88) 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 -01.21

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