4C 56.27

Basic data :
4C 56.27 -- 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 (2019ApJS,4C,...), QSO (2016A&A,QSO,...), Bla (2013ApJS,[DGT2001],...), gam (1FGL,2FGL,...), BLL (2011NewA,[VV98b]), AGN (2011ApJ,CGRaBS), X (2009A&A,EXSS,...), IR (2MASS,WISEA,...), Bz? (2013ApJS,[SRM2005]), V* (2018AJ), G (LEDA), * (Gaia) 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) : 18 24 07.06837171 +56 51 01.4908155 (Radio) [ 0.0314972 0.0321 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) : 18 23 14.96911260 +56 49 18.0483735 [ 0.0314972 0.0321 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) : 085.73889114315 +26.08138233928 [ 0.0314972 0.0321 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 : 0.177 0.583 [0.086 0.092 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) 140705 [~] / z(emission) 0.664 [~] / cz 199062 [~]    (Opt) D 2013ApJ...764..135S 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): 0.0339 [0.0718] A 2020yCat.1350....0G 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 (7) : B 18.9 [~] E ~ V 18.4 [~] E ~ R 16.48 [~] D 2008ApJS..175...97H G 17.543262 [0.028464] C 2020yCat.1350....0G J 15.685 [0.055] C 2003yCat.2246....0C H 14.625 [0.060] C 2003yCat.2246....0C K 13.838 [0.049] C 2003yCat.2246....0C	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 56.27	GB6 B1823+5649	RGB J1824+568	9Y-MST J1823+5652
ATO J276.0294+56.8504	87GB 182315.0+564925	RGB J1824.1+5651	[DGT2001] J1823+568
BWE 1823+5649	ICRF J182407.0+565101	RORF 1823+568	[HB93] 1823+568
6C 182314+564916	IERS B1823+568	1RXS J182407.0+565059	[HMI96] 1823+5649
7C 1823+5649	IVS B1823+568	S4 1823+56	[IN88] 1823+568
7C 182315.20+564917.00	JVAS B1823+568	S4 1823+568	[MGL2009] BZB J1824+5651
7C 182315.19+564917.00	JVAS J1824+568	TIC 389918371	[MML2015] 5BZB J1824+5651
CGRaBS J1824+5651	1Jy 1823+568	TXS 1823+568	[P82] 1823+568
CJ1 1823+568	1Jy 1823+56	VSOP J1824+5651	[PW82] 1823+56
CJF B1823+568	LEDA 2821401	WB 1823+5649	[SRM2005] J182407.07+565101.4
CLASS J182407.0711+565101.491	2MASS J18240707+5651014	WISEA J182407.07+565101.5	[VV2000] J182406.9+565101
EXSS 1823.3+5649	MY 182314.4+565107.1	WISE J182407.07+565101.5	[VV2003] J182406.9+565101
1FGL J1824.0+5651	NEWPS5 J1824+5650	WMAP J1824+5650	[VV2006] J182406.9+565101
2FGL J1824.0+5650	NVSS J182407+565101	WMAP 53	[VV2010] J182406.9+565101
3FGL J1824.2+5649	OHIO U 539	WMAP J1824+5651	[VV98b] J182406.9+565101
4FGL J1824.1+5651	PCCS1 030 G085.73+26.11	WMAP J1824+5649	Gaia DR3 2151322077453975936
3FHL J1824.0+5651	QSO B1823+568	WMAP J1823+5651	Gaia DR1 2151322077453975936
GB6 J1824+5650	QSO J1824+5651	WN B1823.2+5649	Gaia DR2 2151322077453975936

References (462 between 1850 and 2023) (Total 462) 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 56.27

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