Date and Time of the Query: 2021-12-05 T22:15:16 PST
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Redshift: Unconstrained
Include ANY Object Type: Radio
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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

NED results within 2.000 arcmin of 15h57m51.40000s, -00d01m50.4000s (Equatorial: J2000.0)

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    [HB89] 1555+001                15h57m51.4s -00d01m50s QSO    >30000  1.770000 SPEC 19.3    0.008  170     3   74   26     9    4     0 Retrieve Retrieve 1   

Detailed information for each object

Object No. 1 - [HB89] 1555+001

INDEX for [HB89] 1555+001
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):

74 Photometric data point(s) and SED   
Redshift-Independent Distances
170 Reference(s)   
26 Position data point(s)
9 Redshift data point(s)   
4 Diameter data point(s)   
3 Note(s)   
PKS data    
HB89 data    

ESSENTIAL NOTE for [HB89] 1555+001 (Back to INDEX)

CROSS-IDENTIFICATIONS for [HB89] 1555+001 (Back to INDEX)
Object Names Type Object Names Type
[HB89] 1555+001QSO DA 393 RadioS
PKS 1555+001 RadioSTXS 1555+001 RadioS
WISE J155751.42-000150.3 IrS DW 1555+00 RadioS
WISEA J155751.42-000150.3 IrS GB6 J1557-0001 RadioS
SDSS J155751.43-000150.3 * ICRF J155751.4-000150 RadioS
LQAC 239-000 007 QSO IERS B1555+001 RadioS
CGRaBS J1557-0001 QSO GLEAM J155751-000153 RadioS
LEDA 2828637 G JVAS J1557-0001 RadioS
BZQ J1557-0001 QSO OCARS 1555+001 RadioS
PKS B1555+001 RadioSWB J1557-0001 RadioS
PKS J1557-0001 RadioSWIBRaLS J1557-0001 G
PMN J1557-0001 RadioSQVW5 J155753-0006 RadioS
MRC 1555+001 RadioS[KWP81] 1555+001 RadioS
MG1 J155751-0001 RadioS[VCV2001] J155751.4-000150 QSO
[WB92] 1555+0006 RadioS[SRM2005] J155751.43-000150.4 QSO
FIRST J155751.4-000150 RadioS[HRT2007] J155750-000149 RadioS
NVSS J155751-000150 RadioS[MGL2009] 2055 QSO
VLSS J1557.8-0001 RadioS[XH2014] J239.4642-00.0306 QSO
VSOP J1557-0001 RadioS[ZZ2014] J155751.43-000150.3 RadioS
AT20G J155751-000146 RadioS[LSJ2017] J1557-0001 G
CLASS J1557-0001 RadioS    
CRATES J1557-0001 RadioS    
CRATES J155751.44-000150.4 RadioS    

COORDINATES for [HB89] 1555+001 (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) 238.8237386   0.1121190 15h55m17.6972s +00d06m43.629s  2.30E-04  1.50E-04    0
Equatorial (J2000.0) 239.4643079  -0.0306703 15h57m51.4339s -00d01m50.413s  2.30E-04  1.50E-04    0
Ecliptic   (B1950.0) 236.5687611  20.0117813                              2.30E-04  1.50E-04  168
Ecliptic   (J2000.0) 237.2685026  20.0060515                              2.30E-04  1.50E-04  168
Galactic               9.5778893  37.6764542                              2.30E-04  1.50E-04   55
SuperGalactic        132.0014031  43.5458857                              2.30E-04  1.50E-04  112
Additional detailed measurements with references are also available by clicking below:
26 Position data point(s)


TypeAs PublishedNED HomogenizedFlagReference Code
Activity TypeFlat-Spectrum Radio Source,Flat-Spectrum Radio Source...2007ApJS..171...61H
2 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]0.6040.5050.3820.3020.2100.5910.4600.3180.2370.1760.0990.0630.0420.021
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]0.7580.6020.4620.3730.2700.7190.5290.3840.2910.2060.1260.0800.0510.021

Galactic Extinction based on H I Column Densities and Galaxy Counts
(Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1:
AB = 0.420 mag
See Notes on Galactic Extinction for important caveats.

BASIC DATA for [HB89] 1555+001 (Back to INDEX)
Helio. Radial Velocity     :    530633 +/-        0 km/s SPEC 
Redshift                   :  1.770000 +/- 0.000000  SPEC ; 2018A&A...618A..80G
Description                :                FSRQ 
Magnitude and Filter       : 19.3 
Spare 3                    :  0.06
Spare 4                    :  0.05

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:
9 Redshift data point(s)      74 photometric data point(s)      4 Diameter data point(s)      

QUANTITIES DERIVED FROM REDSHIFT for [HB89] 1555+001 (Details)(Back to INDEX)
Calculated and Corrected Velocities
V (Heliocentric)           :  530633 +/-      0 km/s SPEC 2018A&A...618A..80G
V (Kinematic LSR)          :  530648 +/-      0 km/s SPEC 1986MNRAS.221.1023K
V (Galactocentric GSR)     :  530674 +/-      2 km/s SPEC 1991RC3.9.C...0000d
V (Local Group)            :  530648 +/-      1 km/s SPEC 1996AJ....111..794K
V (3K CMB)                 :  530750 +/-      8 km/s SPEC 1996ApJ...473..576F
V (Virgo Infall only)      :  530769 +/-      9 km/s SPEC 2000ApJ...529..786M
V (Virgo + GA only)        :  530996 +/-     18 km/s SPEC 2000ApJ...529..786M
V (Virgo + GA + Shapley)   :  531057 +/-     19 km/s SPEC 2000ApJ...529..786M

Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/-   5 km/sec/Mpc)
D (Galactocentric GSR)     :  7269.5 +/-  508.9 Mpc      (m-M) = 44.31 +/- 0.15 mag
D (Local Group)            :  7269.1 +/-  508.8 Mpc      (m-M) = 44.31 +/- 0.15 mag
D (3K CMB)                 :  7270.5 +/-  508.9 Mpc      (m-M) = 44.31 +/- 0.15 mag
D (Virgo Infall only)      :  7270.8 +/-  509.0 Mpc      (m-M) = 44.31 +/- 0.15 mag
D (Virgo + GA only)        :  7273.9 +/-  509.2 Mpc      (m-M) = 44.31 +/- 0.15 mag
D (Virgo + GA + Shapley)   :  7274.8 +/-  509.2 Mpc      (m-M) = 44.31 +/- 0.15 mag

Scale at Hubble Flow Distances
Scale (Galactocentric GSR) :   35244 pc/arcsec = 35.244 kpc/arcsec = 2114.61 kpc/arcmin = 126.88 Mpc/degree
Scale (Local Group)        :   35242 pc/arcsec = 35.242 kpc/arcsec = 2114.51 kpc/arcmin = 126.87 Mpc/degree
Scale (3K CMB)             :   35249 pc/arcsec = 35.249 kpc/arcsec = 2114.91 kpc/arcmin = 126.89 Mpc/degree
Scale (Virgo Infall only)  :   35250 pc/arcsec = 35.250 kpc/arcsec = 2114.99 kpc/arcmin = 126.90 Mpc/degree
Scale (Virgo + GA only)    :   35265 pc/arcsec = 35.265 kpc/arcsec = 2115.90 kpc/arcmin = 126.95 Mpc/degree
Scale(Virgo + GA + Shapley):   35269 pc/arcsec = 35.269 kpc/arcsec = 2116.14 kpc/arcmin = 126.97 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 = 0.047 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = 530633 km/sec
Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 1.770391 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 13160 Mpc (m-M) = 45.60 mag Angular-Size Distance : 1715 Mpc (m-M) = 41.17 mag Co-Moving Radial Distance : 4750 Mpc (m-M) = 43.38 mag Co-Moving Tangential Dist. : 4750 Mpc (m-M) = 43.38 mag Co-Moving Volume : 449 Gpc^3 Light Travel-Time : 9.644 Gyr Age at Redshift 1.770391 : 3.654 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 8313 pc/arcsec = 8.313 kpc/arcsec = 498.77 kpc/arcmin = 29.93 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.01698; Magnitude per Unit Area = 4.425 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)]
VisualR 18.75 mag 2008ApJS..175...97H-26.85 [mag] 2.46E+12
Near-InfraredW2 (WISE) 12.97 +/- 0.041 mag 2013wise.rept....1C-32.63 +/- 0.50 [mag] 3.89E+12 +/- 7.93E+11
Mid-InfraredW4 (WISE) 8.057 +/- 0.246 mag 2013wise.rept....1C-37.54 +/- 0.56 [mag] 3.67E+12 +/- 1.11E+12
Millimeter31400 MHz 2.04 +/- .11 Jy 1981AJ.....86.1306G 1.33E+39 +/- 2.75E+38 [W] 3.45E+12 +/- 7.15E+11
Radio4585 MHz 2.58 +/- .13 Jy 1978AJ.....83..685O 2.45E+38 +/- 5.05E+37 [W] 6.37E+11 +/- 1.31E+11
NOTE: The above quantities are derived using a Distance Modulus of 45.60 mag corresponding to
a Luminosity Distance of 13160.0 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 74 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) 4.253.23179 25.0 mag arcsec^-2^ 2007SDSS6.C...0000:35.3326.85
NOTE: At z > 0.5, physical diameters are derived using a Scale (Cosmology Corrected) of 8.313 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
SDSS Sky Server
Parkes Radio Sources Catalogue -- PKS B1555+001 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Parkes-MIT-NRAO 4.85GHz Surveys -- PMN J1557-0001 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Original FIRST Source Catalog -- FIRST J155751.4-000150 Faint Images of the Radio Sky at Twenty-Centimeters
FIRST Survey, Version 1999Jul -- FIRST J155751.4-000150 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
NRAO/VLA Sky Survey (NVSS)
Texas Survey of radio sources at 365MHz -- TXS 1555+001 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
GB6 catalog of radio sources -- GB6 J1557-0001 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
Retrieve mean data from LEDA -- PGC 2828637 The Lyon/Meudon Extragalactic Database (LEDA)
Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- [HB89] 1555+001GALEX Mission Data Archive at MAST
Explore IRSA resources with RADAR (10 arcsec search radius) -- [HB89] 1555+001NASA/IPAC Infrared Science Archive (IRSA)
Resources for position 15h57m51.4s, -00d01m50s (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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