B2 2308+34

Basic data :
6C 230840+340844 -- 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,...), QSO (2010ApJ,QSO,...), gam (1FGL,2FGL,...), Bla (2009A&A,[MGL2009],...), MIR (WISEA,WISE), AGN (2011ApJ), Q? (2021MNRAS), AG? (2022ApJS), * (Gaia), X (2009A&A), 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) : 23 11 05.32880063 +34 25 10.9049514 (Radio) [ 0.0610028 0.0922 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) : 23 08 41.44073304 +34 08 52.6637834 [ 0.0610028 0.0922 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) : 100.41573191560 -24.02680026716 [ 0.0610028 0.0922 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 : -0.170 0.130 [0.150 0.127 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) 232715 [~] / z(spectroscopic) 1.817567 [~] / cz 544892.88 [~]    (Opt) D 2020ApJS..250....8L 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 (8) : V 19.5 [~] E ~ R 19.2 [~] E 2009A&A...495..691M G 18.776026 [0.029863] C 2020yCat.1350....0G u (AB) 19.1832 [0.0325] C 2020ApJS..250....8L g (AB) 18.7380 [0.0227] C 2020ApJS..250....8L r (AB) 18.3341 [0.0224] C 2020ApJS..250....8L i (AB) 17.9601 [0.0149] C 2020ApJS..250....8L z (AB) 17.7047 [0.0305] C 2020ApJS..250....8L	SIMBAD within arcmin 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.

6C 230840+340844	GB6 B2308+3408	SDSS J231105.33+342510.9	[MGL2009] BZQ J2311+3425
B2 2308+34	87GB 230840.5+340845	TGSSADR J231105.6+342510	[MML2015] 5BZQ J2311+3425
B2.3 2308+34	ICRF J231105.3+342510	TXS 2308+341	[VV2000] J231105.3+342513
BWE 2308+3408	IERS B2308+341	VCS2 J2311+3425	[VV2003] J231105.3+342513
CLASS J231105.3319+342510.881	IVS B2308+341	VLSSr J231105.4+342511	[VV2006] J231105.3+342513
CRATES J231104+342504	JVAS J2311+3425	VLSS J2311.0+3425	[VV2010] J231105.3+342513
1FGL J2311.0+3425	JVAS B2308+341	VSOP J2311+3425	[VV96] J231105.3+342513
2FGL J2311.0+3425	MITG J231105+3425	WB 2308+3408	[VV98] J231105.3+342513
3FGL J2311.0+3425	MY 230841.8+342504.0	WISEA J231105.32+342511.0	Gaia DR3 1911596794199024256
4FGL J2311.0+3425	NVSS J231105+342511	WISE J231105.32+342511.0	Gaia DR1 1911596794199024256
1FHL J2311.0+3425	OHIO Z 314	WMAP J2311+3425	Gaia DR2 1911596794199024256
3FHL J2311.0+3426	QSO B2308+341	WN B2308.6+3408
FL8Y J2311.0+3425	QSO B2308+34	9Y-MST J2311+3427
1FLE J2311+3404	RFC J2311+3425	[HB93] 2308+341

References (121 between 1850 and 2024) (Total 121) 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 : B2 2308+34

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