NGC 4945

Query : NGC 4945 C.D.S. - SIMBAD4 rel 1.225 - 2015.09.04CEST09:48:26

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


Basic data :
NGC 4945 -- 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:
G (Ref,6dFGS,ESO,GLXY,LEDA,2MASX​,2MFGC,SGC,[M98c],[VDD93]), Rad (MOST,MRC,MSH,PKS,PMN,SUMSS​,WMAP,[MEM2008]), AGN (Ref,[HB91],[VV2000c],[VV2003c],[VV2006c],[VV2010c]​,[VV98c]), X (PBC,RX,1RXS,SWIFT,2XMM,XSS​,[KRL2007b]), IR (IRAS,PSCz,[DML87]), gam (1FGL,2FGL,INTREF), GiG ([CHM2007]), Sy2 (Ref), cm (AT20G)
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) :
13 05 27.279 -49 28 04.44 ( Infrared ) [ ] B 2006AJ....131.1163S
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) :
13 05 27.279 -49 28 04.44 [ ]
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) :
13 02 32.08 -49 12 00.8 [ ]
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) :
305.2715 +13.3402 [ ]
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) 538.2 [~] / z(emission) 0.001797 [~] / cz 538.68 [~]   (Rad) C 2004MNRAS.350.1195M
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:
SB(s)cd?edge D 2013MNRAS.428.1927C
Syntax of angular size is : "maj-axis min-axis angle (incl) (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):
15.917 3.820 43 (~) (IR) C 2006AJ....131.1163S
Syntax of fluxes (or magnitudes) is : "filter-name flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, J, H, K, u, g, r, i, z
  • 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 (6) :
B 9.31 [~] C 1989ESOLV.C......0L
V 14.40 [~] D 2010A&A...518A..10V
R 7.55 [~] C 1989ESOLV.C......0L
J 5.598 [0.016] C 2006AJ....131.1163S
H 4.839 [0.017] C 2006AJ....131.1163S
K 4.483 [0.017] 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.
essential notes:


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

: 4
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.

: 38
: 44 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (51) :

NGC 4945 LEDA 45279 RX J130526-49289 [CHM2007] LDC 993 J130527.27-4928044
AT20G J130527-492804 2MASX J13052727-4928044 RX J1305.4-4928 [DML87] 666
AT20G J130527.4-492804 2MFGC 10410 1RXS J130528.0-492758 [HB91] 1302-491
6dFGS gJ130527.3-492805 MOST 1302-492 SGC 130231-4912.2 [KRL2007b] 133
ESO 219-24 MRC 1302-492 SUMSS J130527-492805 [M98c] 130231.0-491212
ESO-LV 219-0240 MRC 1302-491 SWIFT J1305.4-4928 [MEM2008] 174
1FGL J1305.4-4928 MSH 13-4-01 SWIFT J1305.2-4928 [VDD93] 177
2FGL J1305.8-4925 PBC J1305.4-4928 WMAP J1305-4928 [VV2000c] J130527.6-492803
GLXY G305.2+13.3+455 PKS 1302-49 WMAP J1305-4930 [VV2003c] J130527.6-492803
HIPASS J1305-49 PKS 1302-492 WMAP J1305-4934 [VV2006c] J130527.6-492803
INTREF 541 PKS J1305-4928 2XMM J130527.3-492804 [VV2010c] J130527.6-492803
IRAS F13025-4912 PMN J1305-4928 XSS J13073-4926 [VV98c] J130527.6-492803
IRAS 13025-4911 PSCz Q13025-4911 [CHM2007] HDC 790 J130527.27-4928044

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References (1014 between 1850 and 2015)
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 : 8    IRAS : 1    ISO : 23    posa : 1    RVel : 4    velocities : 10    XMM : 2    Z : 3    ze : 1   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database

Catalogue information from VizieR :

Generic search by coordinates (radius: 30 arcsec)

NGC 4945 ESO-LV 219-0240 HIPASS J1305-49 IRAS F13025-4912 IRAS 13025-4911
2MASX J13052727-4928044 PKS 1302-49 PKS 1302-492 PKS J1305-4928 PMN J1305-4928
1RXS J130528.0-492758 SUMSS J130527-492805 [DML87] 666

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

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2015.09.04-09:48:26

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