7C 021804.09+354230.00

Basic data :
7C 021804.09+354230.00 -- 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,6C,...), gam (0FGL,1FGL,...), QSO (2010ApJ,QSO,...), Bla (2009A&A,[MGL2009],...), AGN (2011ApJ,CGRaBS), Bz? (2013ApJS), MIR (WISEA,WISE), BLL ([VV2000b]), LeQ (2010A&A), * (Gaia), NIR (2MASS) 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) : 02 21 05.4920852208 +35 56 13.848581904 (Optical) [ 0.6789 0.5596 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) : 02 18 04.1481859503 +35 42 31.905428591 [ 0.6789 0.5596 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) : 142.6017556453413 -23.4867590680300 [ 0.6789 0.5596 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 : 1.268 0.853 [1.042 0.810 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) 175952 [~] / z(~) 0.96 [~] / cz 287801 [~]    D 2008A&A...478...95Y 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: S 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 (7) : B 20.0 [~] E ~ V 20.0 [~] E ~ R 19.60 [~] D 2008ApJS..175...97H G 20.089766 [0.007478] C 2020yCat.1350....0G J 16.893 [0.159] D 2003yCat.2246....0C H 15.856 [0.123] D 2003yCat.2246....0C K 14.849 [0.102] D 2003yCat.2246....0C	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: lensed by [PBK93] B0218+357 G see also Lensed images [PBK93] B0218+357 A, [PBK93] B0218+357 B, [PBK93] B0218+357 C, [PBK93] B0218+357 D, [PBK93] B0218+357 A1, [PBK93] B0218+357 A2, [PBK93] B0218+357 B1, [PBK93] B0218+357 B2 Possibly associated to 0FGL J0220.9+3607 according to 2009ApJ...707L..56K See also Specfind radio flux densities.

6C 021803+354230	4FGL J0221.1+3556	MITG J0221+3555	VLSSr J022105.6+355612
B2 0218+35	1FHL J0221.1+3555	MITG J022105+3555	VLSS J0221.0+3556
B2.3 0218+35	2FHL J0221.1+3556	MY 021802.8+354235.2	VSOP J0221+3556
B2 0218+357	3FHL J0221.1+3556	MY 021802.8+355617.1	WB 0218+3542
BWE 0218+3542	1FLE J0221+3604	NRAO 0218+35	WISEA J022105.48+355613.7
7C 021804.09+354230.00	GB6 B0218+3542	NVSS J022105+355613	WISE J022105.47+355613.7
CGRaBS J0221+3556	87GB 021804.0+354230	OHIO D 330	WISE J022105.48+355613.7
CJ1 0218+357	GRA B0218+35	QSO B0218+357	WN B0218.0+3542
CJF B0218+357	GRA J0220+35	QSO B0218+3542	9Y-MST J0221+3556
CLASS B0218+357	ICRF J022105.4+355613	QSO J0221+3556	[MGL2009] BZU J0221+3556
CLASS J022105.4705+355613.723	IERS B0218+357	RORF 0218+357	[MML2015] 5BZU J0221+3556
CLASS J022105.4679+355613.737	IVS B0218+357	S3 0218+35	[VV2000b] J022105.4+355615
CLASS J022105.4679+355613.723	JVAS B0218+357	S4 0218+357	[VV2003] J022105.4+355615
CRATES J022105+355613	JVAS J0221+359	S4 0218+35	[VV2006] J022105.4+355615
0FGL J0220.9+3607	JVAS J0221+3556	TeV J0218+359	[VV2010] J022105.4+355615
1FGL J0221.0+3555	1Jy 0218+35	TGSSADR J022105.3+355612	[VV96] J022105.4+355615
2FGL J0221.0+3555	1Jy 0218+357	TIC 129790256	[VV98] J022105.4+355615
3FGL J0221.1+3556	2MASS J02210547+3556137	TXS 0218+357	Gaia DR3 328069053976561536

References (547 between 1850 and 2024) (Total 547) 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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External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : 7C 021804.09+354230.00

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