ngc4494

C.D.S. - SIMBAD4 rel 1.5.11 - 2017.10.18CEST09:25:39

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


Basic data :
NGC 4494 -- 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:
LIN (), G (Ref,LEDA,...), GiC (CAIRNS,GIN), GiG ([CHM2007]), GiP (Ref), IR (IRAS)
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 31 24.034 +25 46 29.93 (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) :
12 31 24.034 +25 46 29.93 [ ]
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 28 54.53 +26 03 03.4 [ ]
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) :
228.5957 +85.3158 [ ]
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) 1318 [20] / z(~) 0.004406 [0.000067] / cz 1320.89 [20.09]
   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 C 2015ApJS..217...27A
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):
3.297 2.868 173 (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 10.55 [0.10] D 2009MNRAS.393..329N
V 9.74 [0.10] D 2009MNRAS.393..329N
J 7.904 [0.019] C 2006AJ....131.1163S
H 7.249 [0.023] C 2006AJ....131.1163S
K 6.998 [0.024] C 2006AJ....131.1163S
u (AB) 15.69 [0.02] D 2009yCat.2294....0A
g (AB) 14.133 [0.008] C 2009yCat.2294....0A
r (AB) 10.485 [0.008] C 2009yCat.2294....0A
i (AB) 13.588 [0.009] C 2009yCat.2294....0A
z (AB) 12.456 [0.010] 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!).
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 ) :

: 5
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.

: 462
: 136 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (16) :

NGC 4494 LEDA 41441 UGC 7662 [BEC2010] HRS 186
CAIRNS J123124.11+254628.1 2MASX J12312403+2546299 UZC J123124.3+254632 [CHM2007] HDC 706 J123124.03+2546299
GIN 784 MCG+04-30-002 Z 129-5 [CHM2007] LDC 867 J123124.03+2546299
IRAS F12288+2603 SDSS J123124.03+254629.9 Z 1228.9+2603 [FWB89] Galaxy 272

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References (110 between 2012 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).
Follow new references on this object

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Measurements (10 types) :


distance : 4    herschel : 3    ISO : 1    IUE : 1    posa : 1    RVel : 5    velocities : 9    XMM : 1    Z : 1    ze : 1   

   

Warning : measurements from IRAS, IRC, SAO, CL.g (ACO), GJ have been removed

distance (4)

 |distance Q unit|  err-       err+    | method |     reference     |
 --------------------------------------------------------------------
 |   16.90   Mpc |  -0.14      +0.14   |        |2013AJ....146...86T|
 

herschel (3)

The 1 column in color are computed by VizieR, and are not part of the original data.

Note: (see also the postcard server)

VI/139/herschel
Post annotation
Herschel Observation Log (Herschel Science Centre, 2013) [ReadMe+ftp]
The Herschel Observation Log (37093 rows)
img(gal)
start AladinLite

Full _r OD Target RAJ2000 DEJ2000 Proposal AOT Dur Start ObsId PACS HIFI SPIRE Label arcmin "h:m:s" "d:m:s" s s
1 0.0011 1316 ngc4494 12 31 24.03 +25 46 29.9 OT1_lcortese_1 PacsPhoto 397 2012-12-20T09:55:10 1342257584 get Herschel/PACS observation #1342257584 NGC4494 PACS 2rep orthogonal 2 0.0011 1316 ngc4494 12 31 24.03 +25 46 29.9 OT1_lcortese_1 PacsPhoto 397 2012-12-20T09:47:27 1342257583 get Herschel/PACS observation #1342257583 NGC4494 PACS 2rep parallel 3 0.0011 231 ngc4494 12 31 24.03 +25 46 29.9 KPGT_seales01_1 SpirePhoto 2641 2009-12-31T03:25:42 1342188759 get Herschel/SPIRE observation #1342188759 ngc4494

iso (1)

The 2 columns in color are computed by VizieR, and are not part of the original data.
Note: Quick-look images of the data, and specific documentation, are accessible by clicking on the TDT observation identifier
VI/111/isolog
Post annotation
ISO Observation Log (ISO Data Centre, 2004) [ReadMe+ftp]

*The ISO Observation Log (36737 rows) (Note)
img(gal)
start AladinLite

Full _r TDT AOT minLam maxLam Target oStart oLen recno FOV RAJ2000 DEJ2000 cal ObsID abs PropID arcmin um um s s deg deg
1 0.102 19800350 PHT22 54.76 216.69 ngc4494 1996-06-02T03:54:02 612 7769 181.4"x181.4" 187.8519 +25.7756 HUNN + HUNNEGAL

iue (1)

 |Homogenized Name:  ComplID   |PROG |CL|D CAM IMAGE A| FES  MD|Obs.da  Time |ExpTim|m|CEB|S|      Comments      |F|     reference     |
 ---------------------------------------------------------------------------------------------------------------------------------------
 |NGC 4494        :            |EGGSF|81|L SWP 24719 L|  180 SO|841219 181700|015000| |206|G|C=95,B=80           |*|1996IUEML.C......0I|
 

posa (1)

 |    alpha        delta    | MajAxis , MinAxis    PA  |equi  epoch |     reference     |
 ----------------------------------------------------------------------------------------
 |12 31 24.1   +25 46 30    |    5.0  ,    5.0      0  |2000 1950.0 |1996ApL&C..35....1G|
 

rvel (5)

 |  Rvel   (nmes)| rem |dis|     reference     |
 -----------------------------------------------
m|   +1321 (    )|     |   |1973UGC...C......0N|
 

velocities (9)

 |typ|    Value    R   m.e.  |A (Nmes)|na,Q,dom ,   res    D| Obs.date | Rem.  |Or|     Reference     |
 ------------------------------------------------------------------------------------------------------
 |v  | 1310                  |  (    )|s , ,Opt ,           |          |       |  |2015AJ....149..171T|
 

xmm (1)

The 3 columns in color are computed by VizieR, and are not part of the original data.
B/xmm/xmmlog
Post annotation
XMM-Newton Observation Log (XMM-Newton Science Operation Center, 2012) [ReadMe+ftp]
The XMM-Newton Observation log (2017-10-16)[image/fits] (13269 rows)
img(gal)
start AladinLite

Full _r Obsno PropDate Object RAJ2000 DEJ2000 Obs0 ObsDur Image PPSp FITS XSAlink arcmin s deg deg s s
1 0.1285 0071340301 2003-01-09 NGC 4494 187.84785 +25.77555 2001-12-04T08:01:19 30710 FITS PPSp 0071340301 Y

z (1)

 |redshift R|     reference     |
 --------------------------------
 | 0.004500 |2001ApJ...560..566K|
 

ze (1)

 |redshift  R  m.e.   |     reference     |
 ------------------------------------------
 | 0.004416  0.000067 |1991RC3v9.C......0D|
 

External archives :

Data at NED - NASA/IPAC Extragalactic Database : ngc4494

Link by name to the catalogue in VizieR :

NGC 4494 IRAS F12288+2603 2MASX J12312403+2546299 SDSS J123124.03+254629.9 UGC 7662

Search by coordinates in Vizier (radius: 30 arcsec)


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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report an error concerning the data of this object



2017.10.18-09:25:39

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