3C 181

Basic data :
3C 181.0 -- 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 (2014ApJS,3C,...), QSO (QSO,[HB93],...), MIR (WISEA,WISE), G (LEDA), * (Gaia), 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) : 07 28 10.2171164616 +14 37 36.565176324 (Optical) [ 0.1025 0.0932 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) : 07 25 20.2183001772 +14 43 46.891834151 [ 0.1025 0.0932 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) : 203.7539678471520 +14.6300038492884 [ 0.1025 0.0932 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 : -0.040 0.070 [0.118 0.097 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) 209952 [93] / z(~) 1.381999 [0.000310] / cz 414312.88 [92.94]    D 2002LEDA.........0P 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): 0.1511 [0.1248] 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 (8) : B 19.35 [~] D 2010A&A...518A..10V V 18.92 [~] D 2010A&A...518A..10V G 17.853079 [0.005937] C 2020yCat.1350....0G u (AB) 18.357 [0.015] C 2015ApJS..219...12A g (AB) 18.353 [0.007] C 2015ApJS..219...12A r (AB) 17.929 [0.007] C 2015ApJS..219...12A i (AB) 17.832 [0.008] C 2015ApJS..219...12A z (AB) 17.730 [0.016] C 2015ApJS..219...12A	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 Gra 0725+14 See also Specfind radio flux densities.

3C 181.0	MRC 0725+147	SDSS J072810.21+143736.6	[S77] 97
BWE 0725+1443	NAICGB 0725+147	TGSSADR J072810.2+143736	[STW98] 0725+1443
3C 181	NAIC 0725+147	TXS 0725+147	[VV2000] J072810.1+143737
4C 14.24	NRAO 266	UT 0725+147	[VV2003] J072810.1+143737
3CR 181	NVSS J072810+143736	VLSSr J072810.5+143735	[VV2006] J072810.1+143737
Cul 0725+147	OHIO I 142	VLSS J0728.1+1437	[VV2010] J072810.1+143737
DA 235	PKS 0725+14	WB 0725+1443	[VV96] J072810.1+143737
GB6 B0725+1443	PKS 0725+147	WISEA J072810.21+143736.5	[VV98] J072810.1+143737
87GB 072520.1+144327	PKS J0728+1437	WISE J072810.21+143736.5	Gaia DR3 3166801437426796416
GLEAM J072810+143736	QSO B0725+147	WISE J072810.21+143736.6	Gaia DR2 3166801437426796416
LEDA 2817578	QSO B0725+1443	WK 135
MITG J072810+1437	QSO J0728+1437	[HB93] 0725+147

References (165 between 1850 and 2024) (Total 165) 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 : 3C 181

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