NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-25 T18:15:53 PDT
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Spectral Energy Distribution (SED) for 4C +31.44:

11 Data Points
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Photometric Data --- Published and Homogenized [Frequency, Flux Density] Units

  Published UnitsHomogenized Units [Frequency, Flux Density]  
No.Observed PassbandMeasurementUncertaintyUnitsFreq (Hz)MeasurementUncertaintyUnitsModeAperture/QualifiersReference CodeNo.
1 4.85 GHz 248 +/- 32 milliJy 4.85E+09 2.48E-01 +/- 3.20E-02 Jy Broad-band 1991ApJS...75.1011G 1
2 4.85 GHz 246 +/- 15 % milliJy 4.85E+09 2.46E-01 +/- 3.69E-02 Jy Broad-band 1991ApJS...75....1B 2
3 4830 MHz (NRAO) 290 ... milliJy 4.83E+09 2.90E-01 ... Jy Broad-band S/N = 46 1990ApJS...72..621L 3
4 1.4 GHz (ATA) 794.0 ... milliJy 1.43E+09 7.94E-01 ... Jy Broad-band Major=180.6"; minor=155.9"; PA=73.0 deg 2010ApJ...719...45C 4
5 1.4GHz 439.7 +/- 15.5 milliJy 1.40E+09 4.40E-01 +/- 1.55E-02 Jy Broad-band 1998AJ....115.1693C 5
6 408 MHz 2.210 +/- 5 % Jy 4.08E+08 2.21E+00 +/- 1.11E-01 Jy Broad-band 1970A&AS....1..281C 6
7 365 MHz (Texas) 3.056 +/- 0.141 Jy 3.65E+08 3.06E+00 +/- 1.41E-01 Jy Broad-band Model:A;MFlag:W;EFlag:+;LFlag:W. 1996AJ....111.1945D 7
8 178 MHz 4.3 +/- 12.5% Jy 1.78E+08 4.30E+00 +/- 5.37E-01 Jy Broad-band 1965MmRAS..69..183P 8
9 151 MHz 5.23 +/- 3.6 % Jy 1.51E+08 5.23E+00 +/- 1.86E-01 Jy Broad-band 1996MNRAS.282..779W 9
10 74 MHz (VLA) 10.96 +/- 1.15 Jy 7.38E+07 1.10E+01 +/- 1.15E+00 Jy Broad-band Corrected for clean bias 2007AJ....134.1245C 10
11 26.3 MHz 26. +/- 7. Jy 2.63E+07 2.60E+01 +/- 7.00E+00 Jy Broad-band 1975AJ.....80..931V 11


Detailed Information for Each Entry

 No. 1
Reference Code : 1991ApJS...75.1011G
Freq. targeted : 4.85 GHz            
Measurement    :  248         milliJy              = 2.48E-27 W m^-2^ Hz^-1^
Uncertainty    :  32          milliJy              = 3.20E-28
Significance   : rms noise
Freq or Vel.   : 4.85         GHz          (OBS   )= 4.85E+09 Hz
Frequency mode : Broad-band measurement
Coord. targeted: 140750.8        +313859 (B1950)
Spatial mode   : Modelled datum
Notes          : From new raw data; Corrected for contaminating sources
Qualifiers     :                                         

No. 2 Reference Code : 1991ApJS...75....1B Freq. targeted : 4.85 GHz Measurement : 246 milliJy = 2.46E-27 W m^-2^ Hz^-1^ Uncertainty : 15 % milliJy = 3.69E-28 Significance : uncertainty Freq or Vel. : 4.85 GHz (OBS )= 4.85E+09 Hz Frequency mode : Broad-band measurement Coord. targeted: 140750.9 +313859 (B1950) Spatial mode : Peak flux Notes : From new raw data; Corrected for contaminating sources Qualifiers :
No. 3 Reference Code : 1990ApJS...72..621L Freq. targeted : 4830 MHz (NRAO) Measurement : 290 milliJy = 2.90E-27 W m^-2^ Hz^-1^ Uncertainty : milliJy = 0.00E+00 Significance : no uncertainty reported Freq or Vel. : 4830 MHz (OBS )= 4.83E+09 Hz Frequency mode : Broad-band measurement Coord. targeted: 14 10 00.8 +31 25 07 (J2000) Spatial mode : Flux integrated from map Notes : From new raw data Qualifiers : S/N = 46
No. 4 Reference Code : 2010ApJ...719...45C Freq. targeted : 1.4 GHz (ATA) Measurement : 794.0 milliJy = 7.94E-27 W m^-2^ Hz^-1^ Uncertainty : milliJy = 0.00E+00 Significance : no uncertainty reported Freq or Vel. : 1.43 GHz (OBS )= 1.43E+09 Hz Frequency mode : Broad-band measurement Coord. targeted: 14 10 01.4 +31 25 03 (J2000) Spatial mode : Flux integrated from map Notes : From new raw data Qualifiers : Major=180.6"; minor=155.9"; PA=73.0 deg
No. 5 Reference Code : 1998AJ....115.1693C Freq. targeted : 1.4GHz Measurement : 439.7 milliJy = 4.40E-27 W m^-2^ Hz^-1^ Uncertainty : 15.5 milliJy = 1.55E-28 Significance : uncertainty Freq or Vel. : 1.40 GHz (OBS )= 1.40E+09 Hz Frequency mode : Broad-band measurement Coord. targeted: 14 09 59.22 +31 24 52.7 (J2000) Spatial mode : Flux integrated from map Notes : From new raw data Qualifiers :
No. 6 Reference Code : 1970A&AS....1..281C Freq. targeted : 408 MHz Measurement : 2.210 Jy = 2.21E-26 W m^-2^ Hz^-1^ Uncertainty : 5 % Jy = 1.11E-27 Significance : internal error Freq or Vel. : 408 MHz (OBS )= 4.08E+08 Hz Frequency mode : Broad-band measurement; peak value reported Coord. targeted: 140750.5 +313906. (B1950) Spatial mode : Peak flux Notes : From new raw data Qualifiers :
No. 7 Reference Code : 1996AJ....111.1945D Freq. targeted : 365 MHz (Texas) Measurement : 3.056 Jy = 3.06E-26 W m^-2^ Hz^-1^ Uncertainty : 0.141 Jy = 1.41E-27 Significance : internal error Freq or Vel. : 365 MHz (OBS )= 3.65E+08 Hz Frequency mode : Broad-band measurement; obtained by interpolation over frequency Coord. targeted: 140749.910 313909.90 (B1950) Spatial mode : Integrated from scans Notes : From new raw data Qualifiers : Model:A;MFlag:W;EFlag:+;LFlag:W.
No. 8 Reference Code : 1965MmRAS..69..183P Freq. targeted : 178 MHz Measurement : 4.3 Jy = 4.30E-26 W m^-2^ Hz^-1^ Uncertainty : 12.5% Jy = 5.37E-27 Significance : uncertainty Freq or Vel. : 178 MHz (OBS )= 1.78E+08 Hz Frequency mode : Broad-band measurement Coord. targeted: 140751.1 +313954 (B1950) Spatial mode : Integrated from scans Notes : From new raw data; Uncorrected for known sources in beam Qualifiers :
No. 9 Reference Code : 1996MNRAS.282..779W Freq. targeted : 151 MHz Measurement : 5.23 Jy = 5.23E-26 W m^-2^ Hz^-1^ Uncertainty : 3.6 % Jy = 1.86E-27 Significance : estimated error Freq or Vel. : 151 MHz (OBS )= 1.51E+08 Hz Frequency mode : Broad-band measurement Coord. targeted: 140749.8 +313909 (B1950) Spatial mode : Flux integrated from map; Beam filling or dilution corrected Notes : From new raw data; Corrected for contaminating sources Qualifiers :
No. 10 Reference Code : 2007AJ....134.1245C Freq. targeted : 74 MHz (VLA) Measurement : 10.96 Jy = 1.10E-25 W m^-2^ Hz^-1^ Uncertainty : 1.15 Jy = 1.15E-26 Significance : rms uncertainty Freq or Vel. : 73.8 MHz (OBS )= 7.38E+07 Hz Frequency mode : Broad-band measurement Coord. targeted: 14 10 01.92 +31 25 02.9 (J2000) Spatial mode : Flux integrated from map Notes : From new raw data Qualifiers : Corrected for clean bias
No. 11 Reference Code : 1975AJ.....80..931V Freq. targeted : 26.3 MHz Measurement : 26. Jy = 2.60E-25 W m^-2^ Hz^-1^ Uncertainty : 7. Jy = 7.00E-26 Significance : uncertainty Freq or Vel. : 26.3 MHz (OBS )= 2.63E+07 Hz Frequency mode : Broad-band measurement Coord. targeted: 140800. +314900. (B1950) Spatial mode : Integrated from scans; Beam filling or dilution corrected Notes : From new raw data Qualifiers :

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