IERS B0821+394

Query : IERS B0821+394

Basic data :
4C 39.23A -- 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 (2010AJ,4C,...), QSO (2005ApJ,QSO,...), Bla (2009A&A,[MGL2009],...), IR (2MASS,2MASSI,...), X (2007AJ,RX,...), AGN (2007AJ,CGRaBS), gam (2FGL,3FGL,...), * (Gaia), Q? (FBQS), Bz? ([SRM2005]), G (LEDA)
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) :
08 24 55.4838640 +39 16 41.903870 (Radio) [ 0.05 0.06 90 ] A 2017ApJS..233....3T
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) :
08 21 37.3097839 +39 26 28.319764 [ 0.05 0.06 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) :
182.1416190249 +34.1921064425 [ 0.05 0.06 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 :
0.177 -0.142 [0.301 0.244 90] A 2018yCat.1345....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) 198351 [~] / z(spectroscopic) 1.216000 [~] / cz 364547.63 [~]
   (Opt) D 2018A&A...613A..51P
Syntax of parallax is : 'value quality [error] bibcode'
  • value : parallax value
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • [error] : mean error
  • bibcode : bibcode of the parallax reference
Parallaxes (mas):
0.0213 [0.2247] A 2018yCat.1345....0G
Syntax of angular size is : "maj-axis min-axis angle (wtype) quality bibcode"
  • maj-axis : major axis size (arc minutes)
  • min-axis : minor axis size (arc minutes)
  • angle : orientation angle (in degrees)
  • (wtype) : wavelength class for the origin of the angular size (Rad, mm, IR, Opt, UV, Xray, Gam)
  • quality : flag of quality of the angular size values ( A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the angular size reference
Angular size (arcmin):
0.0000107 0.0000048 4 (Rad) D 2010AJ....139.1713C
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 18.55 [~] D 2010A&A...518A..10V
V 18.21 [~] D 2010A&A...518A..10V
R 17.20 [~] D 2008ApJS..175...97H
G 18.3590 [0.0072] C 2018yCat.1345....0G
J 15.807 [0.068] C 2010AJ....139.2360S
H 14.923 [0.062] C 2010AJ....139.2360S
K 14.171 [0.060] C 2010AJ....139.2360S
u (AB) 18.521 [0.017] C 2005AJ....129.1755A
g (AB) 18.235 [0.006] B 2009ApJS..182..543A
r (AB) 17.912 [0.007] B 2009ApJS..182..543A
i (AB) 17.650 [0.007] B 2009ApJS..182..543A
z (AB) 17.394 [0.014] C 2005AJ....129.1755A
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 (68) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

4C 39.23A 87GB 082138.7+392640 RGB J0824.9+3916 WISE J082455.47+391641.8
B2 0821+39 ICRF J082455.4+391641 RGB J0824+392 WMAP J0824+3916
B2.3 0821+39 IERS B0821+394 RX J0824.9+3916 WN B0821.6+3926
B3 0821+394 IVS B0821+394 1RXS J082456.0+391646 [GW2008] CoNFIG 21
BWE 0821+3926 JVAS J0824+3916 S4 0821+39 [HB93] 0821+394
4C 39.23 JVAS B0821+394 S4 0821+394 [MGL2009] BZQ J0824+3916
CGRaBS J0824+3916 JVAS J0824+392 SDSS J082455.48+391641.9 [MML2015] 5BZQ J0824+3916
CJ1 0821+394 LAMOST J082455.48+391641.8 SDSS J082455.48+391641.8 [SRM2005] J082455.48+391641.9
CJF B0821+394 LEDA 2820603 SDSS J082455.47+391641.9 [VV2000] J082455.5+391642
CLASS J082455.4829+391641.911 2MASS J08245548+3916421 SDSS J082455.47+391641.8 [VV2003] J082455.5+391642
FBQS J0824+3916 2MASSI J0824554+391642 TIC 99037139 [VV2006] J082455.5+391642
2FGL J0824.7+3914 NVSS J082455+391641 TXS 0821+394 [VV2010] J082455.5+391642
3FGL J0824.9+3916 OHIO J 336 UT 0821+394 [VV96] J082455.5+391642
4FGL J0824.9+3915 PCCS1 030 G182.17+34.17 VSOP J0824+3916 [VV98] J082455.5+391642
FIRST J082455.4+391641 QSO B0821+394 WB 0821+3926 [ZEH2003] RX J0824.9+3916 1
GB2 0821+394 QSO B0821+3926 WISEA J082455.47+391641.8 Gaia DR1 914304769593032448
GB6 B0821+3926 QSO J0824+3916 WISE J082455.47+391641.9 Gaia DR2 914304769593032448

References (182 between 1850 and 2021) (Total 182)
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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Collections of Measurements


velocities : 19    PLX : 1    PM : 2   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : IERS B0821+394

Link by name to the catalogue in VizieR :

4C 39.23A BWE 0821+3926 4C 39.23 FIRST J082455.4+391641 IERS B0821+394
2MASS J08245548+3916421 2MASSI J0824554+391642 NVSS J082455+391641 1RXS J082456.0+391646 SDSS J082455.48+391641.9
SDSS J082455.48+391641.8 SDSS J082455.47+391641.9 SDSS J082455.47+391641.8 VSOP J0824+3916 WISEA J082455.47+391641.8
WISE J082455.47+391641.9 WISE J082455.47+391641.8 WN B0821.6+3926 Gaia DR1 914304769593032448 Gaia DR2 914304769593032448

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2021.09.20-01:17:57

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