NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-08-20 T05:30:37 PDT
Help | Comment | NED Home

You have selected the following parameters to search on:

Velocity(km/s): Unconstrained
Include ANY Object Type:
Exclude ANY Object Type:

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. 344

INDEX for [HB89] 0818-128
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
   Classifications
   Foreground Galactic Extinction    
   External Services
Detailed Data (NED queries):

Images
   
46 Photometric data point(s) and SED   
Spectra   
Redshift-Independent Distances
146 Reference(s)   
19 Position data point(s)
1 Redshift data point(s)   
5 Note(s)   
PKS data    
HB89 data    

ESSENTIAL NOTE for [HB89] 0818-128 (Back to INDEX)
N/A

CROSS-IDENTIFICATIONS for [HB89] 0818-128 (Back to INDEX)
Object Names Type Object Names Type
[HB89] 0818-128QSO AT20G J082057-125859 RadioS
PKS 0818-128 RadioSTXS 0818-128 RadioS
WISE J082057.44-125859.1 IrS Cul 0818-128 RadioS
2MASS J08205744-1258590 IrS ICRF J082057.4-125859 RadioS
GALEXASC J082057.49-125859.0 UvS IERS B0818-128 RadioS
6dF J0820575-125859 QSO VERA J0820-1258 RadioS
LQAC 125-012 001 QSO WB J0820-1258 RadioS
LEDA 2825456 G WIBRaLS J0820-1258 G
BZB J0820-1258 QSO RX J0820.9-1258 XrayS
PKS B0818-128 RadioS1RXS J082057.3-125858 XrayS
PKS J0820-1258 RadioS[VCV2001] J082057.4-125859 QSO
PMN J0820-1258 RadioS[HRT2007] J082057-125858 RadioS
MRC 0818-128 RadioS[MGL2009] 0794 QSO
NVSS J082057-125858 RadioS[MSC2011] J082057.45-125859.1 VisS
VLSS J0820.9-1258 RadioS[MSU2014] J082057-125859 QSO
VSOP J0820-1258 RadioS[ZZ2014] J082057.44-125859.1 RadioS
EGO 0818-128 VisS    
OJ -131 RadioS    

COORDINATES for [HB89] 0818-128 (Back to INDEX)

Position Reference:1998AJ....116..516M

Reference    Frame     Longitude    Latitude        RA           DEC      Uncertainty Ellipse (arcsec)
                       (degrees)   (degrees)                              Semimajor Semiminor  PA(deg)
Equatorial (B1950.0) 124.6510454 -12.8236412 08h18m36.2509s -12d49m25.108s  1.10E-03  1.10E-03    0
Equatorial (J2000.0) 125.2393650 -12.9831025 08h20m57.4476s -12d58m59.169s  1.10E-03  1.10E-03    0
Ecliptic   (B1950.0) 130.5670657 -31.5183213                              1.10E-03  1.10E-03    0
Ecliptic   (J2000.0) 131.2626686 -31.5137823                              1.10E-03  1.10E-03    0
Galactic             235.2090751  13.1649108                              1.10E-03  1.10E-03    0
SuperGalactic        111.7693049 -69.0167769                              1.10E-03  1.10E-03    0
Additional detailed measurements with references are also available by clicking below:
19 Position data point(s)

REDSHIFT-INDEPENDENT DISTANCES for [HB89] 0818-128 (Back to INDEX)
 N/A 

CLASSIFICATIONS (TYPES, ATTRIBUTES) for [HB89] 0818-128 (Back to INDEX)
TypeAs PublishedNED HomogenizedFlagReference Code
Activity TypeBLBL Lac...2006A&A...455..773V
1 Detailed Classification(s)


FOREGROUND GALACTIC EXTINCTION for [HB89] 0818-128 (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]0.2580.2160.1630.1290.0900.2530.1970.1360.1010.0750.0420.0270.0180.009
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]0.3240.2570.1970.1590.1160.3070.2260.1640.1240.0880.0540.0340.0220.009


Galactic Extinction based on H I Column Densities and Galaxy Counts
(Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1:
AB = 0.300 mag
See Notes on Galactic Extinction for important caveats.

BASIC DATA for [HB89] 0818-128 (Back to INDEX)
Helio. Radial Velocity     :     22185 km/s  EST  
Redshift                   :  0.074000  EST      ; 2011ApJ...740...98M
Description                : Opt.var.       BLLAC
Magnitude and Filter       : 16.2R
Spare 3                    :      
Spare 4                    :      

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:
1 Redshift data point(s)      46 photometric data point(s)      

QUANTITIES DERIVED FROM REDSHIFT(Details)
Calculated and Corrected Velocities
V (Heliocentric)           :   22185  km/s           EST  2011ApJ...740...98M
V (Kinematic LSR)          :   22169  km/s           EST  1986MNRAS.221.1023K
V (Galactocentric GSR)     :   21996 +/-      8 km/s EST  1991RC3.9.C...0000d
V (Local Group)            :   21937 +/-     15 km/s EST  1996AJ....111..794K
V (3K CMB)                 :   22458 +/-     19 km/s EST  1996ApJ...473..576F
V (Virgo Infall only)      :   22024 +/-     16 km/s EST  2000ApJ...529..786M
V (Virgo + GA only)        :   22239 +/-     22 km/s EST  2000ApJ...529..786M
V (Virgo + GA + Shapley)   :   22305 +/-     22 km/s EST  2000ApJ...529..786M

Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/- 5 km/sec/Mpc)
D (Galactocentric GSR)     :   301.3 +/-   21.1 Mpc      (m-M) = 37.40 +/- 0.15 mag
D (Local Group)            :   300.5 +/-   21.0 Mpc      (m-M) = 37.39 +/- 0.15 mag
D (3K CMB)                 :   307.6 +/-   21.5 Mpc      (m-M) = 37.44 +/- 0.15 mag
D (Virgo Infall only)      :   301.7 +/-   21.1 Mpc      (m-M) = 37.40 +/- 0.15 mag
D (Virgo + GA only)        :   304.6 +/-   21.3 Mpc      (m-M) = 37.42 +/- 0.15 mag
D (Virgo + GA + Shapley)   :   305.6 +/-   21.4 Mpc      (m-M) = 37.43 +/- 0.15 mag

Scale at Hubble Flow Distances
Scale (Galactocentric GSR) :    1461 pc/arcsec =  1.461 kpc/arcsec =  87.65 kpc/arcmin =   5.26 Mpc/degree
Scale (Local Group)        :    1457 pc/arcsec =  1.457 kpc/arcsec =  87.41 kpc/arcmin =   5.24 Mpc/degree
Scale (3K CMB)             :    1492 pc/arcsec =  1.492 kpc/arcsec =  89.49 kpc/arcmin =   5.37 Mpc/degree
Scale (Virgo Infall only)  :    1463 pc/arcsec =  1.463 kpc/arcsec =  87.76 kpc/arcmin =   5.27 Mpc/degree
Scale (Virgo + GA only)    :    1477 pc/arcsec =  1.477 kpc/arcsec =  88.62 kpc/arcmin =   5.32 Mpc/degree
Scale(Virgo + GA + Shapley):    1481 pc/arcsec =  1.481 kpc/arcsec =  88.88 kpc/arcmin =   5.33 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 = 1.125 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = 22185 km/sec
Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 0.074912 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 326 Mpc (m-M) = 37.56 mag Angular-Size Distance : 282 Mpc (m-M) = 37.25 mag Co-Moving Radial Distance : 303 Mpc (m-M) = 37.41 mag Co-Moving Tangential Dist. : 303 Mpc (m-M) = 37.41 mag Co-Moving Volume : 0.116 Gpc^3 Light Travel-Time : 0.953 Gyr Age at Redshift 0.074912 : 12.346 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 1366 pc/arcsec = 1.366 kpc/arcsec = 81.97 kpc/arcmin = 4.92 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.74904; Magnitude per Unit Area = 0.3137 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 [HB89] 0818-128 (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)]
X-Ray0.1-2.4 keV (ROSAT) 3.42E-12 +/- 5.26E-13 ergs sec^-1^ cm^-2^ 1994A&A...281..355B 4.33E+36 +/- 1.09E+36 [W] 1.13E+10 +/- 2.84E+09
UltravioletNUV (GALEX) AB 19.3924 +/- 0.0844098 mag 2012GASC..C...0000S-18.17 +/- 0.51 [mag] 2.70E+09 +/- 5.80E+08
Near-InfraredK (AAO) 11.57 +/- 0.02 mag 1982MNRAS.199..969A-25.99 +/- 0.50 [mag] 6.91E+10 +/- 1.39E+10
Sub-Millimeter850 microns (JCMT) 225.6 milliJy 2010MNRAS.401.1240J 1.01E+36 [W] 2.63E+09
Radio80 MHz 7. Jy 1995AuJPh..48..143S 7.10E+33 [W] 1.85E+07
NOTE: The above quantities are derived using a Distance Modulus of 37.56 mag corresponding to
a Luminosity Distance of 325.6 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 46 Photometric data point(s) available in NED.

EXTERNAL ARCHIVES AND SERVICES for [HB89] 0818-128 Help (Back to INDEX)
Resources for Object NamesSite/Service
Query 6dF Galaxy Redshift Survey -- 6dF J0820575-125859 6dF Galaxy Redshift Survey
Parkes Radio Sources Catalogue -- PKS B0818-128 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Parkes-MIT-NRAO 4.85GHz Surveys -- PMN J0820-1258 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
NRAO/VLA Sky Survey (NVSS)
Texas Survey of radio sources at 365MHz -- TXS 0818-128 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Retrieve mean data from LEDA -- PGC 2825456 The Lyon/Meudon Extragalactic Database (LEDA)
Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- [HB89] 0818-128GALEX Mission Data Archive at MAST
Explore IRSA resources with RADAR (10 arcsec search radius) -- [HB89] 0818-128NASA/IPAC Infrared Science Archive (IRSA)
Resources for position 08h20m57.4s, -12d58m59s (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)
 Size:    Contours (PS)  JPEG  FITS File 
NRAO/VLA Sky Survey (NVSS)
The NRAO Data Archive System





Back to NED Home