NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-07-20 T18:30:35 PDT
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Velocity(km/s): Unconstrained
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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

Detailed Information for Object No. 1

INDEX for IC 4981
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
   
36 Photometric data point(s) and SED   
Spectra   
Redshift-Independent Distances
17 Reference(s)   
6 Position data point(s)
3 Redshift data point(s)   
17 Diameter data point(s)   
4 Note(s)   
ESO data    
RC3 data    

ESSENTIAL NOTE for IC 4981 (Back to INDEX)
N/A

CROSS-IDENTIFICATIONS for IC 4981 (Back to INDEX)
Object Names Type Object Names Type
IC 4981G GALEXMSC J201939.58-705054.9 UvS
ESO 073-IG 038 G SGC 201426-7100.3 G
ESO 201426-7100.3 G ESO-LV 0730380 G
2MASX J20193921-7050546 IrS PGC 064486 G
2MASS J20193911-7050543 IrS LGG 432:[G93] 003 G
GALEXASC J201939.42-705054.5 UvS [DZ2015] 011-07 G
     

COORDINATES for IC 4981 (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)  303.607037  -71.005321  20h14m25.69s  -71d00m19.2s  1.25E+00  1.25E+00    0
Equatorial (J2000.0)  304.913333  -70.848528  20h19m39.20s  -70d50m54.7s  1.25E+00  1.25E+00    0
Ecliptic   (B1950.0)  286.081349  -49.431134                              1.25E+00  1.25E+00    0
Ecliptic   (J2000.0)  286.782749  -49.437167                              1.25E+00  1.25E+00    0
Galactic              324.116035  -32.709289                              1.25E+00  1.25E+00    0
SuperGalactic         213.256298    2.221043                              1.25E+00  1.25E+00    0
Additional detailed measurements with references are also available by clicking below:
6 Position data point(s)

REDSHIFT-INDEPENDENT DISTANCES for IC 4981 (Back to INDEX)
 N/A 

CLASSIFICATIONS (TYPES, ATTRIBUTES) for IC 4981 (Back to INDEX)
TypeAs PublishedNED HomogenizedFlagReference Code
HierarchyPin a pair...1976RC2...C...0000d
Luminosity Class10.0LC V-VI...1991RC3.9.C...0000d
Galaxy MorphologyIrr pec edge-onIrr pec edge-on...1991RC3.9.C...0000d
8 Detailed Classification(s)


FOREGROUND GALACTIC EXTINCTION for IC 4981 (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]0.1950.1630.1230.0980.0680.1910.1480.1030.0760.0570.0320.0200.0140.007
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]0.2450.1950.1490.1210.0870.2320.1710.1240.0940.0670.0410.0260.0170.007


Galactic Extinction based on H I Column Densities and Galaxy Counts
(Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1:
AB = 0.160 mag
See Notes on Galactic Extinction for important caveats.

BASIC DATA for IC 4981 (Back to INDEX)
Helio. Radial Velocity     :      3812 +/-       20 km/s      
Redshift                   :  0.012715 +/- 0.000067        1989ESOLV.C...0000L
Major Diameter (arcmin)    :   1.0
Minor Diameter (arcmin)    :   0.3
Magnitude and Filter       : 14.05
Classifications            : I pec sp            

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:
3 Redshift data point(s)      36 photometric data point(s)      17 Diameter data point(s)      

QUANTITIES DERIVED FROM REDSHIFT for IC 4981 (Details)(Back to INDEX)
Calculated and Corrected Velocities
V (Heliocentric)           :    3812 +/-     20 km/s      1989ESOLV.C...0000L
V (Kinematic LSR)          :    3807 +/-     20 km/s      1986MNRAS.221.1023K
V (Galactocentric GSR)     :    3700 +/-     21 km/s      1991RC3.9.C...0000d
V (Local Group)            :    3657 +/-     22 km/s      1996AJ....111..794K
V (3K CMB)                 :    3766 +/-     20 km/s      1996ApJ...473..576F
V (Virgo Infall only)      :    3633 +/-     22 km/s      2000ApJ...529..786M
V (Virgo + GA only)        :    4006 +/-     34 km/s      2000ApJ...529..786M
V (Virgo + GA + Shapley)   :    4028 +/-     34 km/s      2000ApJ...529..786M

Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/-   5 km/sec/Mpc)
D (Galactocentric GSR)     :    50.7 +/-    3.6 Mpc      (m-M) = 33.52 +/- 0.15 mag
D (Local Group)            :    50.1 +/-    3.5 Mpc      (m-M) = 33.50 +/- 0.15 mag
D (3K CMB)                 :    51.6 +/-    3.6 Mpc      (m-M) = 33.56 +/- 0.15 mag
D (Virgo Infall only)      :    49.8 +/-    3.5 Mpc      (m-M) = 33.48 +/- 0.15 mag
D (Virgo + GA only)        :    54.9 +/-    3.9 Mpc      (m-M) = 33.70 +/- 0.15 mag
D (Virgo + GA + Shapley)   :    55.2 +/-    3.9 Mpc      (m-M) = 33.71 +/- 0.15 mag

Scale at Hubble Flow Distances
Scale (Galactocentric GSR) :     246 pc/arcsec =  0.246 kpc/arcsec =  14.74 kpc/arcmin =   0.88 Mpc/degree
Scale (Local Group)        :     243 pc/arcsec =  0.243 kpc/arcsec =  14.57 kpc/arcmin =   0.87 Mpc/degree
Scale (3K CMB)             :     250 pc/arcsec =  0.250 kpc/arcsec =  15.01 kpc/arcmin =   0.90 Mpc/degree
Scale (Virgo Infall only)  :     241 pc/arcsec =  0.241 kpc/arcsec =  14.48 kpc/arcmin =   0.87 Mpc/degree
Scale (Virgo + GA only)    :     266 pc/arcsec =  0.266 kpc/arcsec =  15.96 kpc/arcmin =   0.96 Mpc/degree
Scale(Virgo + GA + Shapley):     268 pc/arcsec =  0.268 kpc/arcsec =  16.05 kpc/arcmin =   0.96 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 = 6.230 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = 3812 km/sec
Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 0.012563 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 52.1 Mpc (m-M) = 33.58 mag Angular-Size Distance : 50.8 Mpc (m-M) = 33.53 mag Co-Moving Radial Distance : 51.5 Mpc (m-M) = 33.56 mag Co-Moving Tangential Dist. : 51.5 Mpc (m-M) = 33.56 mag Co-Moving Volume : 0.000571 Gpc^3 Light Travel-Time : 0.167 Gyr Age at Redshift 0.012563 : 13.132 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 246 pc/arcsec = 0.246 kpc/arcsec = 14.78 kpc/arcmin = 0.89 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.95129; Magnitude per Unit Area = 0.05422 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 IC 4981 (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)]
UltravioletNUV (GALEX) AB 17.2552 +/- 0.0155158 mag 2012GASC..C...0000S-16.33 +/- 0.50 [mag] 4.96E+08 +/- 9.94E+07
VisualV (V_T) 13.08 +/- 0.15 mag 1991RC3.9.C...0000d-20.50 +/- 0.52 [mag] 9.75E+09 +/- 2.44E+09
Near-InfraredH 11.852 +/- 0.060 mag 20032MASX.C.......:-21.73 +/- 0.50 [mag] 2.86E+09 +/- 5.95E+08
NOTE: The above quantities are derived using a Distance Modulus of 33.58 mag corresponding to
a Luminosity Distance of 52.1 Mpc [assuming 10%uncertainty] using the Cosmology-Corrected Quantities.
The quantities quoted above have not necessarily been corrected for foreground extinction, and no K-Corrections have been applied.

View details and SED for 36 Photometric data point(s) available in NED.

QUICK-LOOK ANGULAR & PHYSICAL DIAMETERS for IC 4981 (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-LV "Quick Blue" IIa-O 110.9237.71138 27.0 B-mag arcsec^-2^ 1989ESOLV.C...0000L29.6810.09
K_s (2MASS "total") 74.5017.88135 Diameter for "total" magnitude 20032MASX.C.......:20032MASX.C.......:19.934.78
NOTE: At z <= 0.5, physical diameters are derived using a Scale at the Hubble Flow Distance (Virgo + GA + Shapley) of 0.268 kpc/arcsec.
The quantities quoted above have not necessarily been corrected for foreground extinction.

View details for 17 Diameter data point(s) available in NED.

EXTERNAL ARCHIVES AND SERVICES for IC 4981 Help (Back to INDEX)
Resources for Object NamesSite/Service
Query SIMBAD by primary NED object name -- IC 4981SIMBAD (CDS, Strasbourg, France)
ESO/Uppsala Survey -- ESO 073-IG 038 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
2MASS Extended Source Images (JHKs) -- 2MASX J20193921-7050546 NASA/IPAC Infrared Science Archive (IRSA)
The ESO-LV catalog-- ESO-LV 0730380 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Catalogue of Principal Galaxies -- PGC 064486 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Retrieve mean data from LEDA -- PGC 064486 The Lyon/Meudon Extragalactic Database (LEDA)
Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- IC 4981GALEX Mission Data Archive at MAST
Explore IRSA resources with RADAR (10 arcsec search radius) -- IC 4981NASA/IPAC Infrared Science Archive (IRSA)
Resources for position 20h19m39.2s, -70d50m55s (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)
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)
The NRAO Data Archive System





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