IERS B1218+444

Basic data :
7C 121858.79+442808.00 -- 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 (2020A&A,7C,...), QSO (2011MNRAS,[VV2000],...), Bla (2009A&A,[MGL2009],...), MIR (WISEA,WISE), Opt (LAMOST,SDSS), AGN (CGRaBS), * (Gaia), blu (CSO) 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 21 27.04465208 +44 11 29.6721704 (Radio) [ 0.0841056 0.1046 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) : 12 18 59.03887891 +44 28 07.7828537 [ 0.0841056 0.1046 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) : 140.45838090832 +71.90196555301 [ 0.0841056 0.1046 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 : -0.082 -0.246 [0.231 0.197 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) 207637 [54] / z(spectroscopic) 1.34653 [0.00018] / cz 403679.5 [54.0]    (Opt) C 2020ApJS..249....3A 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 19.28 [~] D 2010A&A...518A..10V V 18.85 [~] D 2010A&A...518A..10V R 17.75 [~] D 2008ApJS..175...97H G 18.832499 [0.007230] C 2020yCat.1350....0G u (AB) 18.853 [0.018] C 2020ApJS..249....3A g (AB) 18.781 [0.008] B 2020ApJS..249....3A r (AB) 18.307 [0.008] B 2020ApJS..249....3A i (AB) 18.438 [0.010] C 2020ApJS..249....3A z (AB) 18.566 [0.026] C 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.

7C 121858.79+442808.00	87GB 121858.9+442821	TGSSADR J122127.1+441128	[HMI96] 1218+4428
B3 1218+444B	ICRF J122127.0+441129	TXS 1218+444	[MGL2009] BZQ J1221+4411
BWE 1218+4428	IERS B1218+444	VCS1 J1221+4411	[MML2015] 5BZQ J1221+4411
CGRaBS J1221+4411	IVS B1218+444	VIPS J12214+4411	[VV2000] J122127.0+441130
CJ2 1218+444	JVAS J1221+4411	VIPS 548	[VV2003] J122127.0+441130
CJF B1218+444	JVAS B1218+444	VLSSr J122126.4+441124	[VV2006] J122127.0+441130
CLASS J122127.0448+441129.667	JVAS J1221+441	VLSS J1221.4+4411	[VV2010] J122127.0+441130
CRATES J122126+441140	LAMOST J122127.03+441129.7	WB 1218+4428	[VV98] J122127.0+441130
CSO 1309	LAMOST J122127.04+441129.7	WISEA J122127.04+441129.7	Gaia DR3 1538597163922291968
FIRST J122127.0+441129	NVSS J122127+441129	WISE J122127.04+441129.7	Gaia DR1 1538597163922291968
GB6 B1218+4428	SDSS J122127.04+441129.7	WN B1218.9+4428	Gaia DR2 1538597163922291968

References (67 between 1850 and 2024) (Total 67) 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

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Data at NED - NASA/IPAC Extragalactic Database : IERS B1218+444

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