IERS B0834+250

Basic data :
QSO B0834+2504 -- Blazar 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,B2,...), QSO (2005ApJ,QSO,...), X (2007AJ,1RXS,...), Bla (2009A&A,[MGL2009],...), AGN (2007AJ,CGRaBS), * (USNO,Gaia), MIR (WISEA,WISE), Opt (LAMOST,SDSS), Bz? ([SRM2005]), Q? (FBQS), UV (GALEX), IR (2MASSI) 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 37 40.24568929 +24 54 23.1214722 (Radio) [ 0.0455766 0.0511 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 34 42.31837057 +25 04 54.3906451 [ 0.0455766 0.0511 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) : 199.75815857742 +33.56920673468 [ 0.0455766 0.0511 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 : -0.254 0.000 [0.138 0.099 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) 191146 [24] / z(spectroscopic) 1.12572 [0.00008] / cz 337482.4 [24.0]    (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): 0.0000115 0.0000048 3 (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 17.2 [0.35] D 1998USNO2.C......0M V 18.13 [~] D 2010A&A...518A..10V R 17.4 [0.35] D 1998USNO2.C......0M G 17.901796 [0.003409] C 2020yCat.1350....0G J 16.623 [0.128] C 2010AJ....139.2360S H 15.964 [0.147] C 2010AJ....139.2360S K 15.901 [0.247] C 2010AJ....139.2360S u (AB) 18.350 [0.014] C 2020ApJS..249....3A g (AB) 18.311 [0.007] B 2020ApJS..249....3A r (AB) 17.980 [0.006] B 2020ApJS..249....3A i (AB) 17.971 [0.008] B 2020ApJS..249....3A z (AB) 18.030 [0.019] 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 Specfind radio flux densities.

QSO B0834+2504	JVAS J0837+2454	SDSS J083740.24+245423.1	[P82] 0834+250
B2.2 0834+25	JVAS B0834+250	SDSS J083740.25+245423.1	[SRM2005] J083740.24+245423.1
B2 0834+25	LAMOST J083740.25+245423.1	TIC 117161981	[VV2000] J083740.2+245423
BWE 0834+2505	2MASS J08374024+2454234	TXS 0834+250	[VV2003] J083740.2+245423
CGRaBS J0837+2454	2MASSI J0837402+245423	USNO-A2.0 1125-05686435	[VV2006] J083740.2+245423
CLASS J083740.2481+245423.125	MITG J083739+2454	VCS1 J0837+2454	[VV2010] J083740.2+245423
FBQS J0837+2454	NRAO 0834+25	WB 0834+2505	[VV96] J083740.2+245423
FIRST J083740.2+245423	NVSS J083740+245422	WISEA J083740.24+245422.8	[VV98] J083740.2+245423
GALEX 2693726530884862933	NVSS J083740+245423	WISE J083740.24+245422.8	Gaia DR3 702569208388453120
GB6 B0834+2504	OHIO J 259	2XMM J083740.2+245423	Gaia DR1 702569204091505792
87GB 083442.3+250459	QSO B0834+250	3XMM J083740.2+245423	Gaia DR2 702569208388453120
ICRF J083740.2+245423	QSO J0837+2454	[HB93] 0834+250
IERS B0834+250	1RXS J083740.4+245413	[MGL2009] BZQ J0837+2454
IVS B0834+250	S3 0834+25	[MML2015] 5BZQ J0837+2454

References (100 between 1850 and 2023) (Total 100) 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 : IERS B0834+250

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