B2 2308+34

Query : 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
', {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 Simbad points in this preview
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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!).
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Some important notes on this object about identifications and objects associations.
notes:


The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (53) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

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 (119 between 1850 and 2024) (Total 119)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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                Reference summaries :

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Collections of Measurements


velocities : 4    PM : 2   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : B2 2308+34

Link by name to the catalogue in VizieR :

BWE 2308+3408 IERS B2308+341 MITG J231105+3425 NVSS J231105+342511 SDSS J231105.33+342510.9
VSOP J2311+3425 WISEA J231105.32+342511.0 WISE J231105.32+342511.0 WMAP J2311+3425 WN B2308.6+3408
Gaia DR3 1911596794199024256 Gaia DR1 1911596794199024256 Gaia DR2 1911596794199024256

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