NGC 4261

Query : NGC 4261
C.D.S. - SIMBAD4 rel 1.5.11 - 2017.06.29CEST12:36:35

Available data : Basic data  •  Identifiers  •  Plot & images  •  Bibliography  •  Measurements  •  External archives  •  Notes  •  Annotations


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 (ASB,3C,...), G (Ref,EVCC,...), X (2E,RX,...), AGN ([VV2003c],[VV2006c],...), GiG ([CHM2007]), GiP (Ref), LIN (Ref), smm (JCMTSE)
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] : coordinates error major axis, minor axis (in mas at epoch defined in your output options),
    position angle (in degrees North to East of the specified coordinate frame)
  • 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 23.21621 +05 49 29.6948 (Radio) [ 159.350 16.350 0 ] A 2004AJ....127.3587F
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] : coordinates error major axis, minor axis (in mas at epoch defined in your output options),
    position angle (in degrees North to East of the specified coordinate frame)
  • 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
FK5 coord. (ep=J2000 eq=2000) :
12 19 23.216 +05 49 29.69 [ 159.350 16.350 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] : coordinates error major axis, minor axis (in mas at epoch defined in your output options),
    position angle (in degrees North to East of the specified coordinate frame)
  • 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 50.01 +06 06 08.8 [ 159.350 16.350 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] : coordinates error major axis, minor axis (in mas at epoch defined in your output options),
    position angle (in degrees North to East of the specified coordinate frame)
  • 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) :
281.8049 +67.3726 [ 159.350 16.350 0 ]
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]
   C 2009yCat.2294....0A
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)
  • (incl) : inclination (in units of 15° from 0 to 7)
  • (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):
2.780 2.391 173 (IR) C 2006AJ....131.1163S
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 7.51 [0.021] C 2006AJ....131.1163S
K 7.263 [0.028] C 2006AJ....131.1163S
u (AB) 13.375 [0.003] C 2009yCat.2294....0A
g (AB) 11.466 [0.002] C 2009yCat.2294....0A
r (AB) 10.662 [0.001] C 2009yCat.2294....0A
i (AB) 10.212 [0.001] C 2009yCat.2294....0A
z (AB) 9.852 [0.002] C 2009yCat.2294....0A
SIMBAD with radius arcmin
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within radius 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!).

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

: 1
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.

: 282
: 3149 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (56) :

NGC 4261 GRA B1216+06 PKS 1216+061 WMAP J1219+0548
ASB 32 ICRF J121923.2+054929 PKS 1216+06 WMAP J1219+0549
3C 270.0 IERS B1216+061 PMN J1219+0549 2XMM J121923.2+054929
3C 270 JCMTSE J121923.3+054920 RGB J1219.4+0549 Z 42-13
4C 06.44 1Jy 1216+061 RX J1219.3+0549 Z 1216.8+0606
3CR 270 1Jy 1216+06 RX J1219.4+0549 [CHM2007] HDC 720 J121923.26+0549289
CTA 52 LEDA 39659 1RXS J121924.1+054935 [CHM2007] LDC 904 J121923.26+0549289
Cul 1216+061 2MASX J12192326+0549289 SDSS J121923.21+054929.7 [DGW65] 54
Cul 1216+06 MCG+01-31-052 SDSS J121923.22+054929.7 [FWB89] Galaxy 246
DA 319 MRC 1216+061 SIM 1216+06.0 [GW2008] CoNFIG 131
2E 2655 MSH 12+0-05 UGC 7360 [VV2003c] J121923.2+054929
2E 1216.8+0606 NEWPS5 J1219+0549 UZC J121923.2+054930 [VV2006c] J121923.2+054929
EVCC 342 NRAO 395 VCC 345 [VV2010c] J121923.2+054929
GB6 J1219+0549a NVSS B121650+060612 WMAP 164 [ZEH2003] RX J1219.4+0549 1

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References (1017 between 1850 and 2017)
Simbad bibliographic survey began in 1950 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Measurements (9 types) :


distance : 5    Einstein : 1    ISO : 5    posa : 1    RVel : 7    velocities : 14    XMM : 1    Z : 3    ze : 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 4C 06.44 3CR 270
IERS B1216+061 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

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Annotations :
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The list of all annotations to SIMBAD objects can be found here .

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2017.06.29-12:36:35

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