NGC 4261

Query : NGC 4261

Basic data :
NGC 4261 -- LINER-type Active Galaxy Nucleus
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 (2020A&A,ASB,...), G (2015ApJS,EVCC,...), X (2E,RX,...), AGN ([VV2003c],[VV2006c],...), AG? (2020MNRAS), LIN (2012ApJ), BL? (2021MNRAS), GiG ([CHM2007]), gam (4FGL), smm (JCMTSE), NIR (2MASS), 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) : 		12 19 23.2160630 +05 49 29.700024 (Radio) [ 0.01 0.02 90 ] A 2017ApJS..233....3T
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) : 		12 16 50.0106839 +06 06 08.760078 [ 0.01 0.02 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) : 		281.8048847577 +67.3725601205 [ 0.01 0.02 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 : 		-0.00883 0.03145 [0.01879 0.02195 90] ~ 2017ApJS..233....3T
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) 2183 [66] / z(spectroscopic) 0.00731 [0.00022] / cz 2191.5 [66.0]
   E 2009ApJS..182..543A
Syntax of morphological type is : mtype quality bibcode
  • mtype : Hubble morphological class (spirals, ellipticals, etc)
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the morphological type reference
Morphological type: 		E-E/S0 C 2014A&A...569A.124V
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): 		4.17 3.39 160 (Opt) D 2003A&A...412...45P
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 (10) :
B 13.92 [~] D 2010A&A...518A..10V
V 12.87 [~] D 2010A&A...518A..10V
J 8.202 [0.019] C 2006AJ....131.1163S
H 7.510 [0.021] C 2006AJ....131.1163S
K 7.263 [0.028] C 2006AJ....131.1163S
u (AB) 13.375 [0.003] C 2009ApJS..182..543A
g (AB) 11.466 [0.002] C 2009ApJS..182..543A
r (AB) 10.662 [0.001] C 2009ApJS..182..543A
i (AB) 10.212 [0.001] C 2009ApJS..182..543A
z (AB) 9.852 [0.002] 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 Simbad points in this preview
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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!). sed-help-icon

Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 9
The count displayed here is the number of children objects.
The list obtained by clicking the button may be larger, as some children may be linked with different references or probability.

%This number is the number of distinct objets linked, by using this button, you will obtain all links (may be more than one) from that object to his children

: 283 		: 6440 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (61) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

NGC 4261 IERS B1216+061 RGB J1219.4+0549 Z 42-13
ASB 32 JCMTSE J121923.3+054920 RX J1219.3+0549 Z 1216.8+0606
3C 270.0 1Jy 1216+061 RX J1219.4+0549 [CHM2007] HDC 720 J121923.26+0549289
3C 270 1Jy 1216+06 1RXS J121924.1+054935 [CHM2007] LDC 904 J121923.26+0549289
3CR 270 LEDA 39659 SDSS J121923.21+054929.7 [DGW65] 54
CTA 52 2MASS J12192321+0549295 SDSS J121923.22+054929.7 [FWB89] Galaxy 246
Cul 1216+061 2MASX J12192326+0549289 SIM 1216+06.0 [GW2008] CoNFIG 131
Cul 1216+06 MCG+01-31-052 TIC 149968813 [LB2005] NGC 4261 X1
DA 319 MRC 1216+061 UGC 7360 [SMM2006b] J121923.23+054929.9
2E 2655 MSH 12+0-05 UZC J121923.2+054930 [VV2003c] J121923.2+054929
2E 1216.8+0606 NEWPS5 J1219+0549 VCC 345 [VV2006c] J121923.2+054929
EVCC 342 NRAO 395 VEPS 1 J1219+054B [VV2010c] J121923.2+054929
4FGL J1219.6+0550 NVSS B121650+060612 WMAP 164 [ZEH2003] RX J1219.4+0549 1
GB6 J1219+0549a PKS 1216+061 WMAP J1219+0548
GRA B1216+06 PKS 1216+06 WMAP J1219+0549
ICRF J121923.2+054929 PMN J1219+0549 2XMM J121923.2+054929

References (1223 between 1850 and 2024) (Total 1223)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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                Reference summaries :

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Collections of Measurements


velocities : 17    distance : 8    PM : 1   

   

Observing logs


ISO : 5    XMM : 1   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : NGC 4261

Link by name to the catalogue in VizieR :

NGC 4261 3C 270.0 3C 270 3CR 270 2E 2655
IERS B1216+061 2MASS J12192321+0549295 2MASX J12192326+0549289 NVSS B121650+060612 PKS 1216+061
PKS 1216+06 PMN J1219+0549 1RXS J121924.1+054935 SDSS J121923.21+054929.7 SDSS J121923.22+054929.7
UGC 7360 WMAP J1219+0548 WMAP J1219+0549

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Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

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