IERS B0831+557

Basic data :
ICRF J083454.9+553421 -- Seyfert 2 Galaxy 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: Sy2 (), Rad (2020A&A,ICRF,...), AGN (2007AJ,[HB91],...), BiC (2010ApJS,[YHW2016]), G (2019ApJS,LEDA,...), X (2007AJ,H,...), Bla (2009A&A,[MGL2009],...), QSO (2016A&A,QSO), rG (2016MNRAS), Sy1 (2017ApJS), GiC (2016ApJS), * (Gaia), gam (INTREF), 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) : 08 34 54.90398776 +55 34 21.0703409 (Radio) [ 0.126359 0.1138 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) : 08 31 04.37074103 +55 44 41.4240507 [ 0.126359 0.1138 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) : 162.22750617238 +36.55940950540 [ 0.126359 0.1138 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 : 0.790 -0.841 [1.200 1.294 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) 63867 [12] / z(spectroscopic) 0.24154 [0.00004] / cz 72411.9 [12.0]    (Opt) C 2020ApJS..249....3A 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): 0.42 0.19 56 (Opt) E 2003A&A...412...45P 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 (10) : B 20.75 [~] D 2010A&A...518A..10V V 19.45 [~] D 2010A&A...518A..10V R 17.180 [~] D 2010ApJ...712..303C G 20.438063 [0.009244] C 2020yCat.1350....0G J 16.366 [0.157] D 2003yCat.2246....0C u (AB) 19.876 [0.111] D 2020ApJS..249....3A g (AB) 18.399 [0.014] C 2020ApJS..249....3A r (AB) 17.186 [0.009] B 2020ApJS..249....3A i (AB) 16.542 [0.008] B 2020ApJS..249....3A z (AB) 16.338 [0.021] 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 NAME 4C 55 CLUSTER See also Specfind radio flux densities.

ICRF J083454.9+553421	IERS B0831+557	RGB J0834+555	[HB91] 0831+557
BWE 0831+5544	INTREF 357	RGB J0834.9+5534	[MGL2009] BZU J0834+5534
4C 55.16	IVS B0831+557	RORF 0831+557	[MML2015] 5BZG J0834+5534
6C 083104+554441	JVAS B0831+557	RX J0834.9+5534	[P82] 0831+557
7C 083104.29+554441.00	JVAS J0834+5534	1RXS J083454.3+553417	[VV2000c] J083454.9+553421
CJ1 0831+557	JVAS J0834+555	S4 0831+557	[VV2003c] J083454.9+553421
CJF B0831+557	1Jy 0831+557	S4 0831+55	[VV2006c] J083454.9+553421
CLASS J083454.9039+553421.089	1Jy 0831+55	SDSS J083454.90+553421.1	[VV2010c] J083454.9+553421
DA 251	LEDA 2506893	SDSS J083454.89+553421.1	[VV98c] J083454.9+553421
DES J083454.88+553421.4	2MASX J08345512+5534289	TXS 0831+557	[YHW2016] 128.72868+55.57263
FIRST J083454.9+553421	2MFGC 6756	UT 0831+557	[ZEH2003] RX J0834.9+5534 1
FIRST J083454.9+553420	MY 083103.9+553421.4	VLSS J0834.9+5534	Gaia DR3 1033752865271463168
GB6 B0831+5544	NVSS J083454+553421	VSOP J0834+5534	Gaia DR1 1033752860979378176
87GB 083104.9+554452	OGC 0443	WB 0831+5544	Gaia DR2 1033752865271463168
GRA B0832+55	OHIO J 552	WN B0831.0+5544
H 0738+31	QSO B0831+557	[GW2008] CoNFIG 26

References (271 between 1850 and 2023) (Total 271) 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 : IERS B0831+557

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