4C 39.23A

Basic data :
4C 39.23A -- 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,6C,...), QSO (2005ApJ,KODIAQ,...), Bla (2009A&A,[MGL2009],...), AGN (2007AJ,CGRaBS), X (2007AJ,RX,...), gam (2FGL,3FGL,...), Q? (2021MNRAS,FBQS), MIR (WISEA,WISE), Opt (LAMOST,SDSS), Bz? ([SRM2005]), AG? (2022ApJS), G (LEDA), * (Gaia), NIR (2MASS), 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 24 55.48385834 +39 16 41.9040476 (Radio) [ 0.0310019 0.0315 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 21 37.30980107 +39 26 28.3243595 [ 0.0310019 0.0315 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) : 182.14161896254 +34.19210643216 [ 0.0310019 0.0315 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 : 0.171 -0.230 [0.158 0.153 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) 198321 [51] / z(spectroscopic) 1.21561 [0.00017] / cz 364430.7 [51.0]    (Opt) C 2015ApJS..219...12A 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): 0.1556 [0.1981] A 2020yCat.1350....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 18.342058 [0.006355] C 2020yCat.1350....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) 18.516 [0.017] C 2020ApJS..249....3A g (AB) 18.239 [0.006] B 2020ApJS..249....3A r (AB) 17.907 [0.007] B 2020ApJS..249....3A i (AB) 17.651 [0.007] B 2020ApJS..249....3A z (AB) 17.368 [0.013] 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.

6C 082137+392627	GB6 B0821+3926	QSO J0824+3916	WISE J082455.47+391641.8
B2 0821+39	87GB 082138.7+392640	RGB J0824.9+3916	WMAP J0824+3916
B2.3 0821+39	ICRF J082455.4+391641	RGB J0824+392	WN B0821.6+3926
B3 0821+394	IERS B0821+394	RX J0824.9+3916	[GW2008] CoNFIG 21
BWE 0821+3926	IVS B0821+394	1RXS J082456.0+391646	[HB93] 0821+394
4C 39.23A	JVAS J0824+3916	S4 0821+39	[MGL2009] BZQ J0824+3916
4C 39.23	JVAS B0821+394	S4 0821+394	[MML2015] 5BZQ J0824+3916
7C 082137.29+392626.00	JVAS J0824+392	SDSS J082455.48+391641.9	[SRM2005] J082455.48+391641.9
CGRaBS J0824+3916	KODIAQ J082455+391641	SDSS J082455.48+391641.8	[VV2000] J082455.5+391642
CJ1 0821+394	LAMOST J082455.47+391641.8	SDSS J082455.47+391641.9	[VV2003] J082455.5+391642
CJF B0821+394	LAMOST J082455.48+391641.8	SDSS J082455.47+391641.8	[VV2006] J082455.5+391642
CLASS J082455.4829+391641.911	LEDA 2820603	TGSSADR J082455.4+391641	[VV2010] J082455.5+391642
CRATES J082456+391645	2MASS J08245548+3916421	TIC 99037139	[VV96] J082455.5+391642
FBQS J0824+3916	2MASSI J0824554+391642	TXS 0821+394	[VV98] J082455.5+391642
2FGL J0824.7+3914	NVSS J082455+391641	UT 0821+394	[ZEH2003] RX J0824.9+3916 1
3FGL J0824.9+3916	OHIO J 336	VSOP J0824+3916	Gaia DR3 914304769593032448
4FGL J0824.9+3915	PCCS1 030 G182.17+34.17	WB 0821+3926	Gaia DR1 914304769593032448
FIRST J082455.4+391641	QSO B0821+394	WISEA J082455.47+391641.8	Gaia DR2 914304769593032448
GB2 0821+394	QSO B0821+3926	WISE J082455.47+391641.9

References (213 between 1850 and 2024) (Total 213) 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 : 4C 39.23A

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