CDS

Cygnus A

Query : Cygnus A
C.D.S. - SIMBAD4 rel 1.7 - 2021.01.22CET14:14:17

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

Basic data :
NAME Cyg A -- 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: 		Sy1 (), Rad (BWE,1C,...), X (3A,2E,...), AGN ([HB91],[VV2000c],...), G (2012A&A,LEDA,...), Sy2 (2007ApJS), QSO (2013ApJS,QSO), IR (IRAS,2MASS), IG (VV), * (KIC), GiC ([OLM97]), GiG ([SS82]), Bla ([IN88]), gam (INTREF)
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) : 		19 59 28.35645829 +40 44 02.0966496 (Radio) [ 0.8944 0.7873 90 ] A 2015AJ....150...58F
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) : 		19 57 44.45357695 +40 35 46.3188060 [ 0.8944 0.7873 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) : 		076.18988032608 +05.75538822840 [ 0.8944 0.7873 90 ]
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) 16360 [48] / z(~) 0.056146 [0.000160] / cz 16832.15 [47.97]
   D 2002LEDA.........0P
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 D ~
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): 		0.603 0.507 160 (NIR) 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 (5) :
B 16.22 [~] E ~
V 15.10 [~] D 2011MNRAS.414..500H
J 11.437 [0.058] C 2006AJ....131.1163S
H 10.611 [0.051] C 2006AJ....131.1163S
K 10.276 [0.062] C 2006AJ....131.1163S
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!).
Some important notes on this object about identifications and objects associations.
notes:

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

: 1 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (57) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

NAME Cyg A 1H 1958+406 NVSS J195932+404347 [DGW65] 129
3A 1958+407 ICRF J195928.3+404402 PBC J1959.4+4044 [HB91] 1957+405
BWE 1957+4035 IERS B1957+406 QSO B1957+405 [HR74] Ce
1C 19.01 INTREF 1004 1RXS J195928.7+404405 [IN88] 1957+405
3C 405.0 IRAS 19577+4035 SWIFT J1959.4+4044 [KRL2007b] 371
3C 405 KIC 5568067 2U 1957+40 [OLM97] J195928.3+404402
4C 40.40 LEDA 63932 3U 1957+40 [SS82] 1
3CR 405 1M 1957+406 4U 1957+40 [VV2000c] J195928.3+404402
CTA 88 2MASS J19592834+4044020 VLSS J1959.4+4044 [VV2003c] J195928.3+404402
CTB 81 2MASX J19592833+4044022 VSOP J1959+4044 [VV2006c] J195928.3+404402
DA 500 MCG+07-41-003 VSOP J1959+4043 [VV2010c] J195928.3+404402
DB 117 Mills 19+4 VV 72 [VV98c] J195928.3+404402
2E 4309 NAME Cygnus A WMAP J1959+4044
2E 1957.7+4035 NRAO 620 W 57
1ES 1957+40.5 NVSS J195924+404419 2XMM J195924.0+404418

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References (2142 between 1850 and 2021) (Total 2142)
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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                 or select by : (not exhaustive, explanation here)

Collections of Measurements


velocities : 8   

   

Observing logs


ISO : 20    herschel : 14   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : Cygnus A

Link by name to the catalogue in VizieR :

BWE 1957+4035 3C 405.0 3C 405 4C 40.40 3CR 405
2E 4309 IERS B1957+406 IRAS 19577+4035 KIC 5568067 2MASS J19592834+4044020
2MASX J19592833+4044022 NVSS J195924+404419 NVSS J195932+404347 1RXS J195928.7+404405 VSOP J1959+4044
VSOP J1959+4043

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Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

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2021.01.22-14:14:17

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