NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2022-01-19 T03:58:02 PST
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You have selected the following parameters to search on:

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 PKS 1557+032
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
  • 34 Photometric data point(s) and SED   
  • Spectra   
    Redshift-Independent Distances
    81 Reference(s)   
    26 Position data point(s)
    14 Redshift data point(s)   
    4 Diameter data point(s)   
    2 Note(s)   
    PKS data    

    ESSENTIAL NOTE for PKS 1557+032 (Back to INDEX)
    N/A

    CROSS-IDENTIFICATIONS for PKS 1557+032 (Back to INDEX)
    Object Names Type Object Names Type
    PKS 1557+032RadioSCRATES J155930.98+030448.3 RadioS
    WISEA J155930.96+030448.6 IrS TXS 1557+032 RadioS
    SDSS J155930.97+030448.1 * GB6 J1559+0304 RadioS
    LQAC 239+003 018 QSO ICRF J155930.9+030448 RadioS
    LQAC 239+003 019 QSO IERS B1557+032 RadioS
    CGRaBS J1559+0304 QSO GLEAM J155931+030456 RadioS
    BZQ J1559+0304 QSO JVAS J1559+0304 RadioS
    PKS B1557+032 RadioSOCARS 1557+032 RadioS
    PKS J1559+0304 RadioS[VCV2001] J155931.1+030447 QSO
    PMN J1559+0304 RadioS[SRM2005] J155930.97+030448.2 QSO
    MG1 J155932+0305 RadioS[HRT2007] J155930+030444 RadioS
    87GB 155659.6+031304 RadioS[JBB2007] J155930.97+030448.2 RadioS
    87GB[BWE91] 1556+0313 RadioS[MGL2009] 2060 QSO
    [WB92] 1556+0313 RadioS[XH2014] J239.8787+03.0800 QSO
    FIRST J155930.9+030448 RadioS[ZZ2014] J155930.97+030448.2 RadioS
    NVSS J155930+030448 RadioS[FRG2017] J239.879+03.080 QSO
    CRATES J1559+0304 RadioS    
         

    COORDINATES for PKS 1557+032 (Back to INDEX)

    Position Reference:2004AJ....127.3587F

    Reference    Frame     Longitude    Latitude        RA           DEC      Uncertainty Ellipse (arcsec)
                           (degrees)   (degrees)                              Semimajor Semiminor  PA(deg)
    Equatorial (B1950.0) 239.2515245   3.2210962 15h57m00.3659s +03d13m15.946s  7.50E-04  6.80E-04    0
    Equatorial (J2000.0) 239.8790525   3.0800714 15h59m30.9726s +03d04m48.257s  7.50E-04  6.80E-04    0
    Ecliptic   (B1950.0) 236.2811659  23.1386070                              7.50E-04  6.80E-04  167
    Ecliptic   (J2000.0) 236.9811168  23.1328967                              7.50E-04  6.80E-04  167
    Galactic              13.1603432  39.0776491                              7.50E-04  6.80E-04   57
    SuperGalactic        128.1376498  45.0297188                              7.50E-04  6.80E-04  109
    
    Additional detailed measurements with references are also available by clicking below:
    26 Position data point(s)

    REDSHIFT-INDEPENDENT DISTANCES for PKS 1557+032 (Back to INDEX)
     N/A 

    CLASSIFICATIONS (TYPES, ATTRIBUTES) for PKS 1557+032 (Back to INDEX)
    TypeAs PublishedNED HomogenizedFlagReference Code
    Activity TypeFlat-Spectrum Radio Source,Flat-Spectrum Radio Source...2007ApJS..171...61H
    2 Detailed Classification(s)


    FOREGROUND GALACTIC EXTINCTION for PKS 1557+032 (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]0.8740.7310.5530.4370.3030.8550.6660.4610.3420.2550.1430.0910.0610.031
    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]1.1270.8950.6870.5540.4021.0690.7870.5710.4330.3070.1870.1190.0760.032


    Galactic Extinction based on H I Column Densities and Galaxy Counts
    (Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1:
    AB = 0.280 mag
    See Notes on Galactic Extinction for important caveats.

    BASIC DATA for PKS 1557+032 (Back to INDEX)
    Helio. Radial Velocity     :   1167707 +/-       79 km/s SPEC 
    Redshift                   :  3.895052 +/- 0.000265  SPEC ; 2016SDSSD.C...0000:
    Description                :                FSRQ 
    Magnitude and Filter       : 19.8 
    Spare 3                    :  0.05
    Spare 4                    :  0.04
    
    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:
    14 Redshift data point(s)      34 photometric data point(s)      4 Diameter data point(s)      

    QUANTITIES DERIVED FROM REDSHIFT for PKS 1557+032 (Details)(Back to INDEX)
    Calculated and Corrected Velocities
    V (Heliocentric)           : 1167707 +/-     79 km/s SPEC 2016SDSSD.C...0000:
    V (Kinematic LSR)          : 1167723 +/-     79 km/s SPEC 1986MNRAS.221.1023K
    V (Galactocentric GSR)     : 1167759 +/-     79 km/s SPEC 1991RC3.9.C...0000d
    V (Local Group)            : 1167737 +/-     79 km/s SPEC 1996AJ....111..794K
    V (3K CMB)                 : 1167819 +/-     80 km/s SPEC 1996ApJ...473..576F
    V (Virgo Infall only)      : 1167859 +/-     80 km/s SPEC 2000ApJ...529..786M
    V (Virgo + GA only)        : 1168067 +/-     81 km/s SPEC 2000ApJ...529..786M
    V (Virgo + GA + Shapley)   : 1168124 +/-     81 km/s SPEC 2000ApJ...529..786M
    
    Hubble Flow Distance and Distance Modulus (where Ho =   73.0 +/-   5 km/sec/Mpc)
    D (Galactocentric GSR)     : 15996.7 +/- 1119.8 Mpc      (m-M) = 46.02 +/- 0.15 mag
    D (Local Group)            : 15996.4 +/- 1119.7 Mpc      (m-M) = 46.02 +/- 0.15 mag
    D (3K CMB)                 : 15997.5 +/- 1119.8 Mpc      (m-M) = 46.02 +/- 0.15 mag
    D (Virgo Infall only)      : 15998.1 +/- 1119.9 Mpc      (m-M) = 46.02 +/- 0.15 mag
    D (Virgo + GA only)        : 16000.9 +/- 1120.1 Mpc      (m-M) = 46.02 +/- 0.15 mag
    D (Virgo + GA + Shapley)   : 16001.7 +/- 1120.1 Mpc      (m-M) = 46.02 +/- 0.15 mag
    
    Scale at Hubble Flow Distances
    Scale (Galactocentric GSR) :   77554 pc/arcsec = 77.554 kpc/arcsec = 4653.25 kpc/arcmin = 279.19 Mpc/degree
    Scale (Local Group)        :   77553 pc/arcsec = 77.553 kpc/arcsec = 4653.16 kpc/arcmin = 279.19 Mpc/degree
    Scale (3K CMB)             :   77558 pc/arcsec = 77.558 kpc/arcsec = 4653.49 kpc/arcmin = 279.21 Mpc/degree
    Scale (Virgo Infall only)  :   77561 pc/arcsec = 77.561 kpc/arcsec = 4653.64 kpc/arcmin = 279.22 Mpc/degree
    Scale (Virgo + GA only)    :   77575 pc/arcsec = 77.575 kpc/arcsec = 4654.47 kpc/arcmin = 279.27 Mpc/degree
    Scale(Virgo + GA + Shapley):   77578 pc/arcsec = 77.578 kpc/arcsec = 4654.70 kpc/arcmin = 279.28 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 = 0.021 arcmin and Selected Redshift, defined by the Velocity Range: from to km/sec where V(Heliocentric) = 1167707 km/sec
    Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73] [Redshift 3.895426 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation] Luminosity Distance : 34426 Mpc (m-M) = 47.68 mag Angular-Size Distance : 1437 Mpc (m-M) = 40.79 mag Co-Moving Radial Distance : 7032 Mpc (m-M) = 44.24 mag Co-Moving Tangential Dist. : 7032 Mpc (m-M) = 44.24 mag Co-Moving Volume : 1.46e+03 Gpc^3 Light Travel-Time : 11.716 Gyr Age at Redshift 3.895426 : 1.583 Gyr Age of Universe : 13.299 Gyr Scale (Cosmology Corrected): 6964 pc/arcsec = 6.964 kpc/arcsec = 417.87 kpc/arcmin = 25.07 Mpc/degree Surface Brightness Dimming : Flux Density per Unit Area = 0.00174; Magnitude per Unit Area = 6.898 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 PKS 1557+032 (Back to INDEX)
     N/A 

    QUICK-LOOK ANGULAR & PHYSICAL DIAMETERS for PKS 1557+032 (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) 4.193.4481 25.0 mag arcsec^-2^ 2007SDSS6.C...0000:29.1823.93
    NOTE: At z > 0.5, physical diameters are derived using a Scale (Cosmology Corrected) of 6.964 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.

    EXTERNAL ARCHIVES AND SERVICES for PKS 1557+032 Help (Back to INDEX)
    Resources for Object NamesSite/Service
    Query SIMBAD by primary NED object name -- PKS 1557+032SIMBAD (CDS, Strasbourg, France)
    version
    SDSS Sky Server
    Parkes Radio Sources Catalogue -- PKS B1557+032 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
    Parkes-MIT-NRAO 4.85GHz Surveys -- PMN J1559+0304 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
    Original FIRST Source Catalog -- FIRST J155930.9+030448 Faint Images of the Radio Sky at Twenty-Centimeters
    FIRST Survey, Version 1999Jul -- FIRST J155930.9+030448 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
    NRAO/VLA Sky Survey (NVSS)
    Texas Survey of radio sources at 365MHz -- TXS 1557+032 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
    GB6 catalog of radio sources -- GB6 J1559+0304 VizieR Catalog Query (U.S. mirror, CfA/Harvard)
    Query GALEX (NUV/FUV) Mission Archive (7.2 arcsec search radius) -- PKS 1557+032GALEX Mission Data Archive at MAST
    Explore IRSA resources with RADAR (10 arcsec search radius) -- PKS 1557+032NASA/IPAC Infrared Science Archive (IRSA)
    Resources for position 15h59m31.0s, +03d04m48s (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)
    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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