NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-10-21 T21:05:14 PDT
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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 ON +231


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    W Com                          12h21m31.7s +28d13m59s QSO    >30000  0.102000      16.5     ...   520     8  109   40    25    4     1 Retrieve Retrieve 1   

Detailed information for each object


Object No. 1 - W Com

INDEX for W Com
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
   
109 Photometric data point(s) and SED   
Spectra   
Redshift-Independent Distances
520 Reference(s)   
40 Position data point(s)
25 Redshift data point(s)   
4 Diameter data point(s)   
8 Note(s)   
1 Association(s)   
HB89 data    

ESSENTIAL NOTE for W Com (Back to INDEX)
N/A

CROSS-IDENTIFICATIONS for W Com (Back to INDEX)
Object Names Type Object Names Type
W ComV* VIPS J12215+2813 RadioS
[HB89] 1219+285 QSO WB J1221+2813 RadioS
B2 1219+28 RadioSWIBRaLS J1221+2813 G
WISE J122131.68+281358.4 IrS RX J1221.5+2813 XrayS
WISE J122131.69+281358.5 IrS RX J1221.5+2814 XrayS
2MASS J12213168+2813585 IrS 1RXS J122131.1+281402 XrayS
SDSS J122131.69+281358.4 * 2XMM J122131.6+281358 XrayS
LQAC 185+028 004 QSO 2XMMp J122131.6+281358 XrayS
ASK 576118.0 G 1ES 1218+285 XrayS
CGRaBS J1221+2813 QSO 3FGL J1221.4+2814 GammaS
MAPS-NGP O_321_0818673 G 2FGL J1221.4+2814 GammaS
SSTSL2 J122131.69+281358.5 IrS 1FGL J1221.5+2814 GammaS
BZB J1221+2813 QSO 0FGL J1221.7+2814 GammaS
MG2 J122132+2814 RadioS1AGL J1222+2851 GammaS
87GB 121900.8+283039 RadioS[KWP81] 1219+28 RadioS
87GB[BWE91] 1219+2830 RadioS[CCB83] 1218+285 VisS
[WB92] 1219+2830 RadioS[ATZ98] D115 QSO
FIRST J122131.7+281358 RadioSRX J1221.5+2814:[BEV98] 001 G
NVSS J122131+281358 RadioS[VCV2001] J122131.7+281358 QSO
7C 1219+2830 RadioSRX J1221.5+2814:[ZEH2003] 02 G
S3 1219+28 RadioS[CRJ2004] J1221.5+2813 RadioS
ON +231 RadioS[HRT2007] J122131+281357 RadioS
CRATES J1221+2813 RadioS[JBB2007] J122131.69+281358.5 RadioS
CRATES J122131.69+281358.5 RadioS[LLK2008] 1219+285 RadioS
TXS 1219+285 RadioS[MGL2009] 1453 QSO
VRO 28.12.02 RadioS[MGH2010] J122131.61+281358.48RadioS
ICRF J122131.6+281358 RadioS[LTS2012] J12215+2813 G
IERS B1219+285 RadioS[MSU2014] J122131+281358 QSO
JVAS J1221+2813 RadioS    
MASIV J1221+2813 RadioS    
RGB J1221+282 RadioS    
VIPS 0550 RadioS    

COORDINATES for W Com (Back to INDEX)

Position Reference:1995AJ....110..880J

Reference    Frame     Longitude    Latitude        RA           DEC      Uncertainty Ellipse (arcsec)
                       (degrees)   (degrees)                              Semimajor Semiminor  PA(deg)
Equatorial (B1950.0) 184.7546686  28.5101861 12h19m01.1205s +28d30m36.670s  3.20E-04  2.30E-04    0
Equatorial (J2000.0) 185.3820438  28.2329167 12h21m31.6905s +28d13m58.500s  3.20E-04  2.30E-04    0
Ecliptic   (B1950.0) 171.9988466  27.8324216                              3.20E-04  2.30E-04  153
Ecliptic   (J2000.0) 172.7007967  27.8327789                              3.20E-04  2.30E-04  153
Galactic             201.7356349  83.2880379                              3.20E-04  2.30E-04   82
SuperGalactic         87.1015972   0.2631630                              3.20E-04  2.30E-04  108
Additional detailed measurements with references are also available by clicking below:
40 Position data point(s)

REDSHIFT-INDEPENDENT DISTANCES for W Com (Back to INDEX)

1 Distances found in NED View 1 Individual Distance Measurement(s) for W Com

Summary Statistics computed by NED from 1 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.


W Com Distance Modulus
(mag)
Metric Distance
(Mpc)
Mean 38.57 517.000
Std. Dev. N/A N/A
Min. 38.57 517.000
Max. 38.57 517.000
Median 38.57 517.000

CLASSIFICATIONS (TYPES, ATTRIBUTES) for W Com (Back to INDEX)
TypeAs PublishedNED HomogenizedFlagReference Code
Radio Morphologyradio jetradio jet...1992A&AS...95..249L
Activity TypeFlat-Spectrum Radio Source,Flat-Spectrum Radio Source...2007ApJS..171...61H
Distance IndicatorGeV TeV ratioGeV TeV ratio...2010MNRAS.405L..76P
5 Detailed Classification(s)


FOREGROUND GALACTIC EXTINCTION for W Com (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]0.1010.0850.0640.0510.0350.0990.0770.0530.0400.0290.0170.0100.0070.004
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]0.1230.0970.0750.0600.0440.1160.0860.0620.0470.0330.0200.0130.0080.003


Galactic Extinction based on H I Column Densities and Galaxy Counts
(Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1:
AB = 0.080 mag
See Notes on Galactic Extinction for important caveats.

BASIC DATA for W Com (Back to INDEX)
Helio. Radial Velocity     :     30579 km/s       
Redshift                   :  0.102000           ; 1992NED11.R......1N
Description                : Opt.var.       BLLAC
Magnitude and Filter       : 16.5 
Spare 3                    :  0.31
Spare 4                    :  0.21

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:
25 Redshift data point(s)      109 photometric data point(s)      4 Diameter data point(s)      

QUANTITIES DERIVED FROM REDSHIFT(Details)
Calculated and Corrected Velocities
V (Heliocentric)           :   30579  km/s                1992NED11.R......1N
V (Kinematic LSR)          :   30585  km/s                1986MNRAS.221.1023K
V (Galactocentric GSR)     :   30575 +/-      0 km/s      1991RC3.9.C...0000d
V (Local Group)            :   30545 +/-      2 km/s      1996AJ....111..794K
V (3K CMB)                 :   30867 +/-     20 km/s      1996ApJ...473..576F
V (Virgo Infall only)      :   30744 +/-     14 km/s      2000ApJ...529..786M
V (Virgo + GA only)        :   30913 +/-     18 km/s      2000ApJ...529..786M
V (Virgo + GA + Shapley)   :   30991 +/-     19 km/s      2000ApJ...529..786M

Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/- 5 km/sec/Mpc)
D (Galactocentric GSR)     :   418.8 +/-   29.3 Mpc      (m-M) = 38.11 +/- 0.15 mag
D (Local Group)            :   418.4 +/-   29.3 Mpc      (m-M) = 38.11 +/- 0.15 mag
D (3K CMB)                 :   422.8 +/-   29.6 Mpc      (m-M) = 38.13 +/- 0.15 mag
D (Virgo Infall only)      :   421.1 +/-   29.5 Mpc      (m-M) = 38.12 +/- 0.15 mag
D (Virgo + GA only)        :   423.5 +/-   29.6 Mpc      (m-M) = 38.13 +/- 0.15 mag
D (Virgo + GA + Shapley)   :   424.5 +/-   29.7 Mpc      (m-M) = 38.14 +/- 0.15 mag

Scale at Hubble Flow Distances
Scale (Galactocentric GSR) :    2031 pc/arcsec =  2.031 kpc/arcsec = 121.83 kpc/arcmin =   7.31 Mpc/degree
Scale (Local Group)        :    2029 pc/arcsec =  2.029 kpc/arcsec = 121.72 kpc/arcmin =   7.30 Mpc/degree
Scale (3K CMB)             :    2050 pc/arcsec =  2.050 kpc/arcsec = 123.00 kpc/arcmin =   7.38 Mpc/degree
Scale (Virgo Infall only)  :    2042 pc/arcsec =  2.042 kpc/arcsec = 122.51 kpc/arcmin =   7.35 Mpc/degree
Scale (Virgo + GA only)    :    2053 pc/arcsec =  2.053 kpc/arcsec = 123.18 kpc/arcmin =   7.39 Mpc/degree
Scale(Virgo + GA + Shapley):    2058 pc/arcsec =  2.058 kpc/arcsec = 123.49 kpc/arcmin =   7.41 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 = 0.810 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = 30579 km/sec
Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 0.102962 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 456 Mpc (m-M) = 38.30 mag Angular-Size Distance : 375 Mpc (m-M) = 37.87 mag Co-Moving Radial Distance : 414 Mpc (m-M) = 38.08 mag Co-Moving Tangential Dist. : 414 Mpc (m-M) = 38.08 mag Co-Moving Volume : 0.297 Gpc^3 Light Travel-Time : 1.285 Gyr Age at Redshift 0.102962 : 12.014 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 1819 pc/arcsec = 1.819 kpc/arcsec = 109.13 kpc/arcmin = 6.55 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.67571; Magnitude per Unit Area = 0.4256 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 W Com (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)]
Gamma-Ray100 MeV-100 GeV LAT 68.0E-12 +/- 5.9E-12 erg/s/cm^2^ 2010ApJS..188..405A 2.17E+38 +/- 1.89E+37 [W] 5.66E+11 +/- 4.91E+10
X-Ray0.3-10 keV (Swift) 10.2E-11 erg/cm^2^/s 2010MNRAS.401.1570T 3.26E+38 [W] 8.48E+11
VisualI (AIT) 13.71 milliJy 2004A&A...419...25F 1.66E+38 [W] 4.32E+11
Near-Infrared4.5 microns (IRAC) 3.0004E+04 +/- 4.7392E+01 microJy 2013SSTSLC4.2....0C 6.40E+37 +/- 1.01E+35 [W] 1.66E+11 +/- 2.63E+08
Mid-Infrared24 microns (MIPS) 5.8946E+04 +/- 4.5343E+01 microJy 2013SSTSLC4.2....0C 2.39E+37 +/- 1.84E+34 [W] 6.22E+10 +/- 4.79E+07
Sub-Millimeter850 microns (JCMT) 759.6 milliJy 2010MNRAS.401.1240J 8.58E+36 [W] 2.23E+10
Millimeter226 GHz (NRAO) 1.4 +/- 0.8 Jy 1983ApJ...268...68L 1.01E+37 +/- 5.78E+36 [W] 2.63E+10 +/- 1.50E+10
Radio8085 MHz 2.10 +/- 0.17 Jy 1983AJ.....88...20C 5.43E+35 +/- 4.34E+34 [W] 1.41E+09 +/- 1.13E+08
NOTE: The above quantities are derived using an estimated Distance Modulus of (38.57 +/- N/A) mag corresponding to
a Metric Distance of (517.000 +/- N/A) 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 109 Photometric data point(s) available in NED.

QUICK-LOOK ANGULAR & PHYSICAL DIAMETERS for W Com (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]
r (SDSS Isophotal) 19.5515.6423 25.0 mag arcsec^-2^ 2007SDSS6.C...0000:49.0039.20
NOTE: Physical diameters are derived using a scale of 2.5065 kpc/arcsec based on Average NED-D Metric Distance of (517.000 +/- N/A) Mpc.
The quantities quoted above have not necessarily been corrected for foreground extinction.

View details for 4 Diameter data point(s) available in NED.

EXTERNAL ARCHIVES AND SERVICES for W Com Help (Back to INDEX)
Resources for Object NamesSite/Service
Query SIMBAD by primary NED object name -- W ComSIMBAD (CDS, Strasbourg, France)
The Second Bologna Survey -- B2 1219+28 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
version
SDSS Sky Server
Original FIRST Source Catalog -- FIRST J122131.7+281358 Faint Images of the Radio Sky at Twenty-Centimeters
FIRST Survey, Version 1999Jul -- FIRST J122131.7+281358 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
NRAO/VLA Sky Survey (NVSS)
Texas Survey of radio sources at 365MHz -- TXS 1219+285 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- W ComGALEX Mission Data Archive at MAST
Explore IRSA resources with RADAR (10 arcsec search radius) -- W ComNASA/IPAC Infrared Science Archive (IRSA)
Resources for position 12h21m31.7s, +28d13m59s (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)
version
SDSS Sky Server
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)
    Size:     GIF     FITS File  
Faint Images of the Radio Sky at Twenty-Centimeters
The NRAO Data Archive System

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