Date and Time of the Query: 2022-01-23 T10:17:53 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 1656+482

1 objects found in NED.    


 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    4C +48.41                      16h57m46.9s +48d08m33s QSO    >30000  1.669000 SPEC 21.6     ...    79     1   37   17     6    4     0 Retrieve Retrieve 1   

Detailed information for each object

Object No. 1 - 4C +48.41

INDEX for 4C +48.41
Essential Data (jump to sub-section of this query report):

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

37 Photometric data point(s) and SED   
Redshift-Independent Distances
79 Reference(s)   
17 Position data point(s)
6 Redshift data point(s)   
4 Diameter data point(s)   
1 Note(s)   

ESSENTIAL NOTE for 4C +48.41 (Back to INDEX)

Object Names Type Object Names Type
4C +48.41RadioSIERS B1656+482 RadioS
WISE J165746.88+480833.1 IrS IVS B1656+482 RadioS
SDSS J165746.88+480832.9 * JVAS J1657+4808 RadioS
LQAC 254+048 001 QSO VCS1 J1657+4808 RadioS
CGRaBS J1657+4808 QSO VERA J1657+4808 RadioS
MG4 J165749+4808 RadioSOCARS 1656+482 RadioS
87GB 165623.9+481257 RadioSVIPS 1043 RadioS
87GB[BWE91] 1656+4812 RadioSVIPS J16577+4808 RadioS
87GB[BWE91] 1656+4812 ID G NEWPS_5yr_5s 379 RadioS
[WB92] 1656+4812 RadioSNEWPS_5yr_5s_15 365 RadioS
FIRST J165746.9+480833 RadioS3FHL J1657.8+4808 GammaS
NVSS J165746+480832 RadioS3FGL J1657.7+4807 GammaS
VLSS J1657.7+4808 RadioS2FGL J1657.9+4809 GammaS
6C B165624.3+481303 RadioS4FGL J1657.7+4808 GammaS
6C B165625.4+481312 RadioS9Y-MST J1657+4809 GammaS
S4 1656+48 RadioS[HRT2007] J165746+480832 RadioS
CRATES J1657+4808 RadioS[JBB2007] J165746.87+480833.0 RadioS
CRATES J165746.88+480833.0 RadioS[LSJ2017] J1657+4808 RadioS
TXS 1656+482 RadioS    
GB6 J1657+4808 RadioS    
ICRF J165746.8+480833 RadioS    

COORDINATES for 4C +48.41 (Back to INDEX)

Position Reference:2002ApJS..141...13B

Reference    Frame     Longitude    Latitude        RA           DEC      Uncertainty Ellipse (arcsec)
                       (degrees)   (degrees)                              Semimajor Semiminor  PA(deg)
Equatorial (B1950.0) 254.1040408  48.2179314 16h56m24.9698s +48d13m04.553s  2.00E-03  1.00E-03   90
Equatorial (J2000.0) 254.4453287  48.1425114 16h57m46.8789s +48d08m33.041s  2.00E-03  1.00E-03   90
Ecliptic   (B1950.0) 237.9264538  69.8991090                              2.00E-03  1.00E-03   72
Ecliptic   (J2000.0) 238.6332726  69.8933546                              2.00E-03  1.00E-03   72
Galactic              74.3686103  38.4776809                              2.00E-03  1.00E-03    1
SuperGalactic         56.7297969  49.6220822                              2.00E-03  1.00E-03  137
Additional detailed measurements with references are also available by clicking below:
17 Position data point(s)


TypeAs PublishedNED HomogenizedFlagReference Code
Activity TypeFlat-Spectrum Radio Source,Flat-Spectrum Radio Source...2007ApJS..171...61H
1 Detailed Classification(s)

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]0.0870.0730.0550.0440.0300.0850.0660.0460.0340.0250.0140.0090.0060.003
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]0.1130.0900.0690.0560.0400.1070.0790.0570.0430.0310.0190.0120.0080.003

Galactic Extinction based on H I Column Densities and Galaxy Counts
(Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1:
AB = 0.010 mag
See Notes on Galactic Extinction for important caveats.

BASIC DATA for 4C +48.41 (Back to INDEX)
Helio. Radial Velocity     :    500354 +/-        0 km/s SPEC 
Redshift                   :  1.669000 +/- 0.000000  SPEC ; 2018ApJS..237...32A
Description                :                BLLAC
Magnitude and Filter       : 21.6 
Spare 3                    :  0.04
Spare 4                    :  0.03

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:
6 Redshift data point(s)      37 photometric data point(s)      4 Diameter data point(s)      

Calculated and Corrected Velocities
V (Heliocentric)           :  500354 +/-      0 km/s SPEC 2018ApJS..237...32A
V (Kinematic LSR)          :  500372 +/-      0 km/s SPEC 1986MNRAS.221.1023K
V (Galactocentric GSR)     :  500535 +/-      7 km/s SPEC 1991RC3.9.C...0000d
V (Local Group)            :  500574 +/-     13 km/s SPEC 1996AJ....111..794K
V (3K CMB)                 :  500335 +/-      1 km/s SPEC 1996ApJ...473..576F
V (Virgo Infall only)      :  500658 +/-     14 km/s SPEC 2000ApJ...529..786M
V (Virgo + GA only)        :  500566 +/-     16 km/s SPEC 2000ApJ...529..786M
V (Virgo + GA + Shapley)   :  500566 +/-     16 km/s SPEC 2000ApJ...529..786M

Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/-   5 km/sec/Mpc)
D (Galactocentric GSR)     :  6856.6 +/-  480.0 Mpc      (m-M) = 44.18 +/- 0.15 mag
D (Local Group)            :  6857.2 +/-  480.0 Mpc      (m-M) = 44.18 +/- 0.15 mag
D (3K CMB)                 :  6853.9 +/-  479.8 Mpc      (m-M) = 44.18 +/- 0.15 mag
D (Virgo Infall only)      :  6858.3 +/-  480.1 Mpc      (m-M) = 44.18 +/- 0.15 mag
D (Virgo + GA only)        :  6857.1 +/-  480.0 Mpc      (m-M) = 44.18 +/- 0.15 mag
D (Virgo + GA + Shapley)   :  6857.1 +/-  480.0 Mpc      (m-M) = 44.18 +/- 0.15 mag

Scale at Hubble Flow Distances
Scale (Galactocentric GSR) :   33242 pc/arcsec = 33.242 kpc/arcsec = 1994.51 kpc/arcmin = 119.67 Mpc/degree
Scale (Local Group)        :   33244 pc/arcsec = 33.244 kpc/arcsec = 1994.67 kpc/arcmin = 119.68 Mpc/degree
Scale (3K CMB)             :   33229 pc/arcsec = 33.229 kpc/arcsec = 1993.72 kpc/arcmin = 119.62 Mpc/degree
Scale (Virgo Infall only)  :   33250 pc/arcsec = 33.250 kpc/arcsec = 1995.00 kpc/arcmin = 119.70 Mpc/degree
Scale (Virgo + GA only)    :   33244 pc/arcsec = 33.244 kpc/arcsec = 1994.64 kpc/arcmin = 119.68 Mpc/degree
Scale(Virgo + GA + Shapley):   33244 pc/arcsec = 33.244 kpc/arcsec = 1994.64 kpc/arcmin = 119.68 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 = 0.050 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = 500354 km/sec
Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 1.668939 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 12230 Mpc (m-M) = 45.44 mag Angular-Size Distance : 1717 Mpc (m-M) = 41.17 mag Co-Moving Radial Distance : 4582 Mpc (m-M) = 43.31 mag Co-Moving Tangential Dist. : 4582 Mpc (m-M) = 43.31 mag Co-Moving Volume : 403 Gpc^3 Light Travel-Time : 9.443 Gyr Age at Redshift 1.668939 : 3.856 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 8324 pc/arcsec = 8.324 kpc/arcsec = 499.43 kpc/arcmin = 29.97 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.01971; Magnitude per Unit Area = 4.263 mag
To change Cosmological Input Parameters for Derived Quantities: Enter Your Preferred Values and click on "Submit Changed Hubble Parameters for this object" button
Correct Redshift To the Reference Frame defined by: as Input for Calculation of the Distances and Cosmology-Corrected Quantities


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).

Band Apparent Mag or Flux Refcode Absolute Mag or νLν [W] νLν [L(Bolometric)]
Gamma-Ray0.1-100 GeV (Fermi) 19.8E-12 +/- 0.9E-12 erg/cm^2^/s 2015ApJS..218...23A 3.55E+40 +/- 7.10E+39 [W] 9.24E+13 +/- 1.85E+13
X-Ray0.1-2.4 keV (ROSAT) 1.03E-12 +/- 0.17E-12 erg/cm^2^/s 2007A&A...476..759B 1.84E+39 +/- 4.78E+38 [W] 4.79E+12 +/- 1.24E+12
VisualR 19.70 mag 2008ApJS..175...97H-25.74 [mag] 8.84E+11
Millimeter43 GHz (KVN) 0.70 +/- 0.14 Jy 2017ApJS..228...22L 5.31E+38 +/- 1.50E+38 [W] 1.38E+12 +/- 3.91E+11
Radio74 MHz (VLA) 3.66 +/- 0.38 Jy 2007AJ....134.1245C 4.83E+36 +/- 1.09E+36 [W] 1.26E+10 +/- 2.83E+09
NOTE: The above quantities are derived using a Distance Modulus of 45.44 mag corresponding to
a Luminosity Distance of 12230.0 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 37 Photometric data point(s) available in NED.


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

Passband Apparent Major Axis
(2a) [arcsec]
Apparent Minor Axis
(2b) [arcsec]
Reference Level RefcodePhysical Major Axis
(2a) [kpc]
Physical Minor Axis
(2b) [kpc]
r (SDSS Isophotal) 3.701.78103 25.0 mag arcsec^-2^ 2007SDSS6.C...0000:30.8014.78
NOTE: At z > 0.5, physical diameters are derived using a Scale (Cosmology Corrected) of 8.324 kpc/arcsec.
The quantities quoted above have not necessarily been corrected for foreground extinction.

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

Resources for Object NamesSite/Service
Query SIMBAD by primary NED object name -- 4C +48.41SIMBAD (CDS, Strasbourg, France)
Fourth Cambridge Survey -- 4C +48.41VizieR Catalog Query (U.S. mirror, CfA/Harvard)
SDSS Sky Server
Original FIRST Source Catalog -- FIRST J165746.9+480833 Faint Images of the Radio Sky at Twenty-Centimeters
FIRST Survey, Version 1999Jul -- FIRST J165746.9+480833 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
NRAO/VLA Sky Survey (NVSS)
Texas Survey of radio sources at 365MHz -- TXS 1656+482 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
GB6 catalog of radio sources -- GB6 J1657+4808 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- 4C +48.41GALEX Mission Data Archive at MAST
Explore IRSA resources with RADAR (10 arcsec search radius) -- 4C +48.41NASA/IPAC Infrared Science Archive (IRSA)
Resources for position 16h57m46.9s, +48d08m33s (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)
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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