NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-11-21 T02:47:03 PST
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You have selected the following parameters to search on:

Parameters for Distances and Cosmology: Ho= 73.0; Ωmatter = 0.27; Ωvacuum = 0.73;
Derived Quantities use a Redshift corrected to a Reference Frame defined by the 3K CMB

NED results for object NGC 3956


1 objects found in NED.    

SOURCE LIST

 Row          Object Name                 EquJ2000.0       Object  Velocity/Redshift    Mag./  Separ.               Number of                                 Row 
 No.     (* => Essential Note)       RA               DEC  Type     km/s       z   Qual Filter arcmin Refs Notes Phot Posn Vel/z Diam Assoc Images   Spectra  No. 
1   *NGC 3956                       11h54m00.7s -20d34m02s G        1645  0.005487      13.05    ...    97     7   43   11    12   18     0 Retrieve Retrieve 1   

Detailed information for each object


Object No. 1 - NGC 3956

INDEX for NGC 3956
Essential Data (jump to sub-section of this query report):

   Essential Note    
   Cross-IDs    
   Coordinates    
   Basic Data   
   Quantities Derived from Redshift    
   Redshift-Independent Distances
   Quick-Look Photometry and Luminosities
   Quick-Look Angular and Physical Sizes
   Classifications
   Foreground Galactic Extinction    
   External Services
Detailed Data (NED queries):

Images
   
43 Photometric data point(s) and SED   
Spectra   
Redshift-Independent Distances
97 Reference(s)   
11 Position data point(s)
12 Redshift data point(s)   
18 Diameter data point(s)   
7 Note(s)   
ESO data    
RC3 data    

ESSENTIAL NOTE for NGC 3956 (Back to INDEX)
Confused HIPASS source                                                          

CROSS-IDENTIFICATIONS for NGC 3956 (Back to INDEX)
Object Names Type Object Names Type
NGC 3956G 6dF J1154006-203402 G
UGCA 251 G 6dF J1154007-203402 G
ESO 572- G 013 G LDCE 0856 NED002 G
ESO 115128-2017.3 G HDCE 0684 NED001 G
MCG -03-30-016 G USGC S176 NED13 G
2MASX J11540068-2034023 IrS AGC 028171 G
2MASS J11540065-2034024 IrS GSC 6099 01521 G
IRAS 11514-2017 IrS HIPASS J1154-20 RadioS
IRAS F11514-2017 IrS PGC 037325 G
AKARI J1154009-203402 IrS NVSS J115400-203359 RadioS
CGS 382 G FAUST 2952 UvES
SGC 115128-2017.3 G LGG 263:[G93] 001 G
ESO-LV 5720130 G [DBA2001] FA 28 UvES
     

COORDINATES for NGC 3956 (Back to INDEX)

Position Reference:20032MASX.C.......:

Reference    Frame     Longitude    Latitude        RA           DEC      Uncertainty Ellipse (arcsec)
                       (degrees)   (degrees)                              Semimajor Semiminor  PA(deg)
Equatorial (B1950.0)  177.865513  -20.289040  11h51m27.72s  -20d17m20.5s  1.25E+00  1.25E+00    0
Equatorial (J2000.0)  178.502875  -20.567333  11h54m00.69s  -20d34m02.4s  1.25E+00  1.25E+00    0
Ecliptic   (B1950.0)  186.447215  -19.391835                              1.25E+00  1.25E+00    0
Ecliptic   (J2000.0)  187.143506  -19.393183                              1.25E+00  1.25E+00    0
Galactic              285.204979   40.319420                              1.25E+00  1.25E+00    0
SuperGalactic         133.179730  -19.402505                              1.25E+00  1.25E+00    0
Additional detailed measurements with references are also available by clicking below:
11 Position data point(s)

REDSHIFT-INDEPENDENT DISTANCES for NGC 3956 (Back to INDEX)

30 Distances found in NED View 30 Individual Distance Measurement(s) for NGC 3956

Summary Statistics computed by NED from 30 Distance(s) in the literature:
NOTE: These summary statistics are provided for "quick-look" reference only;
they are based exclusively on original values, as published.
No homogenization or corrections have been applied.


NGC 3956 Distance Modulus
(mag)
Metric Distance
(Mpc)
Mean 31.73 23.180
Std. Dev. 0.65 6.609
Min. 30.64 13.400
Max. 32.74 35.300
Median 31.73 22.200

CLASSIFICATIONS (TYPES, ATTRIBUTES) for NGC 3956 (Back to INDEX)
TypeAs PublishedNED HomogenizedFlagReference Code
HierarchyGRGroup member, radial-velocity confirmed...1992A&AS...93..211F
KinematicsHI line widthHI line width...1996ApJS..107...97M
Luminosity Class5.0LC III...1991RC3.9.C...0000d
Galaxy MorphologySA(s)c:SA(s)c?...1991RC3.9.C...0000d
Distance IndicatorTully-FisherTully-Fisher...1997ApJS..109..333W
45 Detailed Classification(s)


FOREGROUND GALACTIC EXTINCTION for NGC 3956 (Back to INDEX)
Galactic Extinction from the Schlafly & Finkbeiner 2011, Appendix; 2011ApJ...737..103S (SF11) recalibration 
of the Schlegel, Finkbeiner & Davis 1998, Appendix B; 1998ApJ...500..525S (SFD98) infrared-based dust map.
The map is based on dust emission from COBE/DIRBE and IRAS/ISSA;
the recalibration assumes a Fitzpatrick (1999PASP..111...63F) reddening law with Rv = 3.1 and different source spectrum than SFD98.

L a n d o l tS D S SU K I R T
Filter [µm]U (0.35)B (0.43)V (0.54)R (0.64)I (0.80)u (0.36)g (0.47)r (0.62)i (0.75)z (0.89)J (1.25)H (1.66)K (2.19)L' (3.78)
Aλ [mag]0.1750.1470.1110.0880.0610.1710.1330.0920.0690.0510.0290.0180.0120.006
Show/Hide Aλ magnitudes in all 88 photometric bands based on SF11
For completeness, we include the original SFD98 values:
L a n d o l tS D S SU K I R T
Filter [µm]U (0.34)B (0.44)V (0.54)R (0.65)I (0.81)u (0.35)g (0.49)r (0.63)i (0.78)z (0.93)J (1.27)H (1.67)K (2.22)L' (3.81)
Aλ [mag]0.2200.1750.1340.1080.0780.2090.1530.1110.0840.0600.0360.0230.0150.006


Galactic Extinction based on H I Column Densities and Galaxy Counts
(Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1:
AB = 0.070 mag
See Notes on Galactic Extinction for important caveats.

BASIC DATA for NGC 3956 (Back to INDEX)
Helio. Radial Velocity     :      1645 +/-        5 km/s      
Redshift                   :  0.005487 +/- 0.000017        1993AJ....106.1394B
Major Diameter (arcmin)    :   3.4
Minor Diameter (arcmin)    :   1.0
Magnitude and Filter       : 13.05
Classifications            : SA(s)c         HII  

NOTE: This information is indicative only. With the exception of the
      redshift they are unreferenced and highly inhomogeneous as to
      their origin. The Radial Velocity (when available) is computed
      from the listed redshift. The remaining values are designed to
      orient the user with a quick-look, overall assessment of the
      general properties of the object in question. They are not
      averages nor are they standardized in any way.
Additional detailed measurements with references are also available by clicking below:
12 Redshift data point(s)      43 photometric data point(s)      18 Diameter data point(s)      

QUANTITIES DERIVED FROM REDSHIFT for NGC 3956 (Details)(Back to INDEX)
Calculated and Corrected Velocities
V (Heliocentric)           :    1645 +/-      5 km/s      1993AJ....106.1394B
V (Kinematic LSR)          :    1641 +/-      5 km/s      1986MNRAS.221.1023K
V (Galactocentric GSR)     :    1480 +/-      8 km/s      1991RC3.9.C...0000d
V (Local Group)            :    1396 +/-     16 km/s      1996AJ....111..794K
V (3K CMB)                 :    2000 +/-     25 km/s      1996ApJ...473..576F
V (Virgo Infall only)      :    1738 +/-     29 km/s      2000ApJ...529..786M
V (Virgo + GA only)        :    1685 +/-     29 km/s      2000ApJ...529..786M
V (Virgo + GA + Shapley)   :    1678 +/-     29 km/s      2000ApJ...529..786M

Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/-   5 km/sec/Mpc)
D (Galactocentric GSR)     :    20.3 +/-    1.4 Mpc      (m-M) = 31.54 +/- 0.15 mag
D (Local Group)            :    19.1 +/-    1.4 Mpc      (m-M) = 31.41 +/- 0.15 mag
D (3K CMB)                 :    27.4 +/-    1.9 Mpc      (m-M) = 32.19 +/- 0.15 mag
D (Virgo Infall only)      :    23.8 +/-    1.7 Mpc      (m-M) = 31.88 +/- 0.15 mag
D (Virgo + GA only)        :    23.1 +/-    1.6 Mpc      (m-M) = 31.82 +/- 0.15 mag
D (Virgo + GA + Shapley)   :    23.0 +/-    1.6 Mpc      (m-M) = 31.81 +/- 0.15 mag

Scale at Hubble Flow Distances
Scale (Galactocentric GSR) :      98 pc/arcsec =  0.098 kpc/arcsec =   5.90 kpc/arcmin =   0.35 Mpc/degree
Scale (Local Group)        :      93 pc/arcsec =  0.093 kpc/arcsec =   5.56 kpc/arcmin =   0.33 Mpc/degree
Scale (3K CMB)             :     133 pc/arcsec =  0.133 kpc/arcsec =   7.97 kpc/arcmin =   0.48 Mpc/degree
Scale (Virgo Infall only)  :     115 pc/arcsec =  0.115 kpc/arcsec =   6.93 kpc/arcmin =   0.42 Mpc/degree
Scale (Virgo + GA only)    :     112 pc/arcsec =  0.112 kpc/arcsec =   6.72 kpc/arcmin =   0.40 Mpc/degree
Scale(Virgo + GA + Shapley):     111 pc/arcsec =  0.111 kpc/arcsec =   6.69 kpc/arcmin =   0.40 Mpc/degree

To Search for Nearby Objects (Physical Companions): Enter Your Preferred Values and click on "Submit Environment Search" button
Search for Objects within +/-arcmin where 100 kpc = 14.954 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = 1645 km/sec
Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 0.006671 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 27.5 Mpc (m-M) = 32.20 mag Angular-Size Distance : 27.2 Mpc (m-M) = 32.17 mag Co-Moving Radial Distance : 27.4 Mpc (m-M) = 32.19 mag Co-Moving Tangential Dist. : 27.4 Mpc (m-M) = 32.19 mag Co-Moving Volume : 8.58e-05 Gpc^3 Light Travel-Time : 0.089 Gyr Age at Redshift 0.006671 : 13.210 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 132 pc/arcsec = 0.132 kpc/arcsec = 7.91 kpc/arcmin = 0.47 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.97376; Magnitude per Unit Area = 0.02887 mag
To change Cosmological Input Parameters for Derived Quantities: Enter Your Preferred Values and click on "Submit Changed Hubble Parameters for this object" button
HoΩmatterΩvacuum     
Correct Redshift To the Reference Frame defined by: as Input for Calculation of the Distances and Cosmology-Corrected Quantities

QUICK-LOOK PHOTOMETRY and LUMINOSITIES for NGC 3956 (Back to INDEX)

The brightest flux in each of the following spectral regions, when available:
Gamma-Ray (ν > 2E19 Hz); X-Ray (2E19 Hz > ν > 2E16 Hz); Ultraviolet (2E16 Hz > ν > 9E14 Hz); Visual (9E14 Hz > ν > 3E14 Hz);
Near-Infrared (3E14 Hz > ν > 6E13 Hz); Mid-Infrared (6E13 Hz > ν > 7.5E12 Hz); Far-Infrared (7.5E12 Hz > ν > 1E12 Hz);
Sub-Millimeter (1E12 Hz > ν > 3E11 Hz); Millimeter (3E11 Hz > ν > 3E10 Hz); Radio (3E10 Hz > ν).

Spectral
Region
Band Apparent Mag or Flux Refcode Absolute Mag or νLν [W] νLν [L(Bolometric)]
VisualI 10.95 mag 2007ApJS..172..599S-20.78 [mag] 6.72E+09
Near-InfraredJ 10.781 +/- 0.029 mag 20032MASX.C.......:-20.95 +/- 0.26 [mag] 3.11E+09 +/- 3.35E+08
Mid-Infrared12 microns (IRAS) <1.656E-01 Jy 1990IRASF.C...0000M < 2.67E+35 [W] < 6.94E+08
Far-Infrared100 microns (IRAS) 4.287E+00 +/- 8 % Jy 1990IRASF.C...0000M 8.27E+35 +/- 1.09E+35 [W] 2.15E+09 +/- 2.82E+08
Radio1.4GHz 9.9 +/- 1.3 milliJy 1998AJ....115.1693C 8.91E+29 +/- 1.49E+29 [W] 2.32E+03 +/- 3.88E+02
NOTE: The above quantities are derived using an estimated Distance Modulus of (31.73 +/- 0.65) mag corresponding to
a Metric Distance of (23.180 +/- 6.609) Mpc using the Average NED-D value.
The quantities quoted above have not necessarily been corrected for foreground extinction, and no K-Corrections have been applied.

View details and SED for 43 Photometric data point(s) available in NED.

QUICK-LOOK ANGULAR & PHYSICAL DIAMETERS for NGC 3956 (Back to INDEX)

The largest diameters in the Visual and Near-Infrared spectral regions, when available:

Passband Apparent Major Axis
(2a) [arcsec]
Apparent Minor Axis
(2b) [arcsec]
PA
[degrees]
(J2000.0)
Reference Level RefcodePhysical Major Axis
(2a) [kpc]
Physical Minor Axis
(2b) [kpc]
ESO-Uppsala "Quick Blue" IIa-O342.00102.6058 About 25.5 B-mag arcsec^-2^ 1982ESOU..C...0000L38.4311.53
K_s (2MASS "total") 142.6065.6055 Diameter for "total" magnitude 20032MASX.C.......:20032MASX.C.......:16.037.37
NOTE: Physical diameters are derived using a scale of 0.1124 kpc/arcsec based on Average NED-D Metric Distance of (23.180 +/- 6.609) Mpc.
The quantities quoted above have not necessarily been corrected for foreground extinction.

View details for 18 Diameter data point(s) available in NED.

EXTERNAL ARCHIVES AND SERVICES for NGC 3956 Help (Back to INDEX)
Resources for Object NamesSite/Service
Query SIMBAD by primary NED object name -- NGC 3956SIMBAD (CDS, Strasbourg, France)
Revised New General Catalogue -- NGC 3956VizieR Catalog Query (U.S. mirror, CfA/Harvard)
ESO/Uppsala Survey -- ESO 572- G 013 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Morphological Catalog of Galaxies -- MCG -03-30-016 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
2MASS Extended Source Images (JHKs) -- 2MASX J11540068-2034023 NASA/IPAC Infrared Science Archive (IRSA)
IRAS Point Source Catalog -- IRAS 11514-2017 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
IRAS Faint Source Catalog -- IRAS F11514-2017 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
The ESO-LV catalog-- ESO-LV 5720130 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Query 6dF Galaxy Redshift Survey -- 6dF J1154006-203402 6dF Galaxy Redshift Survey
Query 6dF Galaxy Redshift Survey -- 6dF J1154007-203402 6dF Galaxy Redshift Survey
Catalogue of Principal Galaxies -- PGC 037325 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Retrieve mean data from LEDA -- PGC 037325 The Lyon/Meudon Extragalactic Database (LEDA)
NRAO/VLA Sky Survey (NVSS)
Far-UV Point Sources -- FAUST 2952 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- NGC 3956GALEX Mission Data Archive at MAST
Explore IRSA resources with RADAR (10 arcsec search radius) -- NGC 3956NASA/IPAC Infrared Science Archive (IRSA)
Resources for position 11h54m00.7s, -20d34m02s (J2000)Site/Service
Query Optical and UV Mission Archives (Default search radius)Multimission Archive at STScI (MAST)
Query High Energy Mission Archives (Default search radius)HEASARC (NASA/GSFC)
Explore resources with DataScope (15 arcmin search radius)HEASARC (NASA/GSFC)
Query IRSA for WISE images (10 arcmin search radius)NASA/IPAC Infrared Science Archive (IRSA)
Band(s): Size:
NASA/IPAC Infrared Science Archive (IRSA)
Band(s): Size:
NASA/IPAC Infrared Science Archive (IRSA)
NASA/IPAC Infrared Science Archive (IRSA)
 Size:    Contours (PS)  JPEG  FITS File 
NRAO/VLA Sky Survey (NVSS)
The NRAO Data Archive System

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