IERS B0820+225

Basic data :
4C 22.21 -- BL Lac 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,4C,...), QSO (2016A&A,QSO,...), BLL (2008AJ,[VV98b]), Bla ([DGT2001],[MGL2009],...), MIR (WISEA,WISE), AGN (2020MNRAS), G (LEDA), * (Gaia), X (2009A&A), IR (2MASSI), 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 23 24.7592164368 +22 23 03.287299236 (Optical) [ 0.0836 0.0601 90 ] A 2020yCat.1350....0G 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 20 28.5260080449 +22 32 45.014833112 [ 0.0836 0.0601 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) : 201.3642870823441 +29.6767512087320 [ 0.0836 0.0601 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 : -0.140 -0.219 [0.105 0.080 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) 246782 [438] / z(spectroscopic) 2.21102 [0.00146] / cz 662847.1 [437.7]    D 2009ApJS..182..543A 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 (11) : B 20.22 [~] D 2010A&A...518A..10V V 19.57 [~] D 2010A&A...518A..10V R 19.7 [~] E 2007ApJ...667..673G G 17.679178 [0.012119] C 2020yCat.1350....0G H 16.386 [0.225] D 2003yCat.2246....0C K 15.364 [0.123] D 2003yCat.2246....0C u (AB) 20.454 [0.066] C 2009ApJS..182..543A g (AB) 19.933 [0.017] C 2009ApJS..182..543A r (AB) 19.423 [0.015] C 2009ApJS..182..543A i (AB) 18.961 [0.012] C 2009ApJS..182..543A z (AB) 18.569 [0.030] C 2009ApJS..182..543A	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.

4C 22.21	IERS B0820+225	PKS 0820+22	WISE J082324.75+222303.2
B2 0820+22	IVS B0820+225	PKS J0823+2223	[DGT2001] B0820+225
B2.4 0820+22	JVAS J0823+2223	PKS 0820+225	[GW2008] CoNFIG 19
BWE 0820+2233	JVAS B0820+225	QSO B0820+225	[HB93] 0820+225
7C 082028.50+223242.00	1Jy 0820+22	S3 0820+22	[MGL2009] BZB J0823+2223
CLASS J082324.7564+222303.302	1Jy 0820+225	SDSS J082324.75+222303.2	[MML2015] 5BZB J0823+2223
CRTS MLS120126 J082325+222303	LEDA 2819732	TIC 14566237	[VV2000] J082324.8+222303
Cul 0820+225	2MASS J08232476+2223036	TXS 0820+225	[VV2003] J082324.8+222303
DA 249	2MASSI J0823247+222303	VCS1 J0823+2223	[VV2006] J082324.8+222303
F2M J082324.76+222303.3	MITG J082325+2223	VLSS J0823.4+2223	[VV2010] J082324.8+222303
FIRST J082324.7+222303	MITG J0823+2223	VRO 22.08.03	[VV98b] J082324.8+222303
GB6 B0820+2232	NRAO 0820+22	VSOP J0823+2223	Gaia DR3 676375886481155968
87GB 082028.4+223300	NVSS J082324+222303	WB 0820+2233	Gaia DR1 676375882181102592
ICRF J082324.7+222303	OHIO J 233	WISEA J082324.75+222303.2	Gaia DR2 676375886481155968

References (177 between 1850 and 2023) (Total 177) 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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Data at NED - NASA/IPAC Extragalactic Database : IERS B0820+225

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