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Date and Time of the Query: 2019-05-23 T03:43:19 PDT
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Spectral Energy Distribution (SED) for 4C +21.53:

15 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 5000 MHz 0.860 ... Jy 5.00E+09 8.60E-01 ... Jy Broad-band 1990PKS90.C...0000W 1
2 4.85 GHz 694 +/- 93 milliJy 4.85E+09 6.94E-01 +/- 9.30E-02 Jy Broad-band 1991ApJS...75.1011G 2
3 4.85 GHz 688 +/- 15 % milliJy 4.85E+09 6.88E-01 +/- 1.03E-01 Jy Broad-band 1991ApJS...75....1B 3
4 4830 MHz (NRAO) 873 ... milliJy 4.83E+09 8.73E-01 ... Jy Broad-band S/N = 99 1990ApJS...72..621L 4
5 4830 MHz (NRAO) 838 ... milliJy 4.83E+09 8.38E-01 ... Jy Broad-band S/N = 99 1990ApJS...74..129G 5
6 2700 MHz 0.900 ... Jy 2.70E+09 9.00E-01 ... Jy Broad-band 1990PKS90.C...0000W 6
7 1410 MHz 1.500 ... Jy 1.41E+09 1.50E+00 ... Jy Broad-band 1990PKS90.C...0000W 7
8 635 MHz 2.500 ... Jy 6.35E+08 2.50E+00 ... Jy Broad-band 1990PKS90.C...0000W 8
9 365 MHz (Texas) 0.627 +/- 0.069 Jy 3.65E+08 6.27E-01 +/- 6.90E-02 Jy Broad-band Model:A;MFlag:+;EFlag:+;LFlag:W.Poss var 1996AJ....111.1945D 9
10 178 MHz 2.9 +/- 25.0% Jy 1.78E+08 2.90E+00 +/- 7.25E-01 Jy Broad-band 1965MmRAS..69..183P 10
11 178 MHz 2.900 ... Jy 1.78E+08 2.90E+00 ... Jy Broad-band 1990PKS90.C...0000W 11
12 160 MHz ... <2.5 Jy 1.60E+08 < 2.50E+00 Jy Broad-band 1995AuJPh..48..143S 12
13 80 MHz 8. ... Jy 8.00E+07 8.00E+00 ... Jy Broad-band 1995AuJPh..48..143S 13
14 80 MHz 7.000 ... Jy 8.00E+07 7.00E+00 ... Jy Broad-band 1990PKS90.C...0000W 14
15 26.3 MHz 157. +/- 34. Jy 2.63E+07 1.57E+02 +/- 3.40E+01 Jy Broad-band 1975AJ.....80..931V 15


Detailed Information for Each Entry

 No. 1
Reference Code : 1990PKS90.C...0000W
Freq. targeted : 5000 MHz            
Measurement    :  0.860       Jy                   = 8.60E-27 W m^-2^ Hz^-1^
Uncertainty    :              Jy                   = 0.00E+00
Significance   : no uncertainty reported
Freq or Vel.   :     5000     MHz          (OBS   )= 5.00E+09 Hz
Frequency mode : Broad-band measurement
Coord. targeted: 19 37 28.4      +21 28 04 (B1950)
Spatial mode   : Integrated from scans
Notes          : Homogenized from new and previously published data
Qualifiers     :                                         

No. 2 Reference Code : 1991ApJS...75.1011G Freq. targeted : 4.85 GHz Measurement : 694 milliJy = 6.94E-27 W m^-2^ Hz^-1^ Uncertainty : 93 milliJy = 9.30E-28 Significance : rms noise Freq or Vel. : 4.85 GHz (OBS )= 4.85E+09 Hz Frequency mode : Broad-band measurement Coord. targeted: 193729.7 +212954 (B1950) Spatial mode : Modelled datum Notes : From new raw data; Corrected for contaminating sources Qualifiers :
No. 3 Reference Code : 1991ApJS...75....1B Freq. targeted : 4.85 GHz Measurement : 688 milliJy = 6.88E-27 W m^-2^ Hz^-1^ Uncertainty : 15 % milliJy = 1.03E-27 Significance : uncertainty Freq or Vel. : 4.85 GHz (OBS )= 4.85E+09 Hz Frequency mode : Broad-band measurement Coord. targeted: 193729.9 +212954 (B1950) Spatial mode : Peak flux Notes : From new raw data; Corrected for contaminating sources Qualifiers :
No. 4 Reference Code : 1990ApJS...72..621L Freq. targeted : 4830 MHz (NRAO) Measurement : 873 milliJy = 8.73E-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: 19 39 40.0 +21 36 49 (J2000) Spatial mode : Flux integrated from map Notes : From new raw data Qualifiers : S/N = 99
No. 5 Reference Code : 1990ApJS...74..129G Freq. targeted : 4830 MHz (NRAO) Measurement : 838 milliJy = 8.38E-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: 19 39 41.4 +21 37 08 (J2000) Spatial mode : Flux integrated from map Notes : From new raw data Qualifiers : S/N = 99
No. 6 Reference Code : 1990PKS90.C...0000W Freq. targeted : 2700 MHz Measurement : 0.900 Jy = 9.00E-27 W m^-2^ Hz^-1^ Uncertainty : Jy = 0.00E+00 Significance : no uncertainty reported Freq or Vel. : 2700 MHz (OBS )= 2.70E+09 Hz Frequency mode : Broad-band measurement Coord. targeted: 19 37 28.4 +21 28 04 (B1950) Spatial mode : Integrated from scans Notes : Homogenized from new and previously published data Qualifiers :
No. 7 Reference Code : 1990PKS90.C...0000W Freq. targeted : 1410 MHz Measurement : 1.500 Jy = 1.50E-26 W m^-2^ Hz^-1^ Uncertainty : Jy = 0.00E+00 Significance : no uncertainty reported Freq or Vel. : 1410 MHz (OBS )= 1.41E+09 Hz Frequency mode : Broad-band measurement Coord. targeted: 19 37 28.4 +21 28 04 (B1950) Spatial mode : Integrated from scans Notes : Homogenized from new and previously published data Qualifiers :
No. 8 Reference Code : 1990PKS90.C...0000W Freq. targeted : 635 MHz Measurement : 2.500 Jy = 2.50E-26 W m^-2^ Hz^-1^ Uncertainty : Jy = 0.00E+00 Significance : no uncertainty reported Freq or Vel. : 635 MHz (OBS )= 6.35E+08 Hz Frequency mode : Broad-band measurement Coord. targeted: 19 37 28.4 +21 28 04 (B1950) Spatial mode : Integrated from scans Notes : Homogenized from new and previously published data Qualifiers :
No. 9 Reference Code : 1996AJ....111.1945D Freq. targeted : 365 MHz (Texas) Measurement : 0.627 Jy = 6.27E-27 W m^-2^ Hz^-1^ Uncertainty : 0.069 Jy = 6.90E-28 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: 193725.881 212916.68 (B1950) Spatial mode : Integrated from scans Notes : From new raw data Qualifiers : Model:A;MFlag:+;EFlag:+;LFlag:W.Poss var
No. 10 Reference Code : 1965MmRAS..69..183P Freq. targeted : 178 MHz Measurement : 2.9 Jy = 2.90E-26 W m^-2^ Hz^-1^ Uncertainty : 25.0% Jy = 7.25E-27 Significance : uncertainty Freq or Vel. : 178 MHz (OBS )= 1.78E+08 Hz Frequency mode : Broad-band measurement Coord. targeted: 193801.1 +213412 (B1950) Spatial mode : Integrated from scans Notes : From new raw data; Uncorrected for known sources in beam Qualifiers :
No. 11 Reference Code : 1990PKS90.C...0000W Freq. targeted : 178 MHz Measurement : 2.900 Jy = 2.90E-26 W m^-2^ Hz^-1^ Uncertainty : Jy = 0.00E+00 Significance : no uncertainty reported Freq or Vel. : 178 MHz (OBS )= 1.78E+08 Hz Frequency mode : Broad-band measurement Coord. targeted: 19 37 28.4 +21 28 04 (B1950) Spatial mode : Integrated from scans Notes : Homogenized from new and previously published data Qualifiers :
No. 12 Reference Code : 1995AuJPh..48..143S Freq. targeted : 160 MHz Measurement : <2.5 Jy < 2.50E-26 W m^-2^ Hz^-1^ Uncertainty : Significance : no uncertainty reported Freq or Vel. : 160 MHz (OBS )= 1.60E+08 Hz Frequency mode : Broad-band measurement Coord. targeted: 193727.1 +212824. (B1950) Spatial mode : Flux integrated from map Notes : From new raw data Qualifiers :
No. 13 Reference Code : 1995AuJPh..48..143S Freq. targeted : 80 MHz Measurement : 8. Jy = 8.00E-26 W m^-2^ Hz^-1^ Uncertainty : Jy = 0.00E+00 Significance : no uncertainty reported Freq or Vel. : 80 MHz (OBS )= 8.00E+07 Hz Frequency mode : Broad-band measurement Coord. targeted: 193727.1 +212824. (B1950) Spatial mode : Flux integrated from map Notes : From new raw data Qualifiers :
No. 14 Reference Code : 1990PKS90.C...0000W Freq. targeted : 80 MHz Measurement : 7.000 Jy = 7.00E-26 W m^-2^ Hz^-1^ Uncertainty : Jy = 0.00E+00 Significance : no uncertainty reported Freq or Vel. : 80 MHz (OBS )= 8.00E+07 Hz Frequency mode : Broad-band measurement Coord. targeted: 19 37 28.4 +21 28 04 (B1950) Spatial mode : Integrated from scans Notes : Homogenized from new and previously published data Qualifiers :
No. 15 Reference Code : 1975AJ.....80..931V Freq. targeted : 26.3 MHz Measurement : 157. Jy = 1.57E-24 W m^-2^ Hz^-1^ Uncertainty : 34. Jy = 3.40E-25 Significance : uncertainty Freq or Vel. : 26.3 MHz (OBS )= 2.63E+07 Hz Frequency mode : Broad-band measurement Coord. targeted: 193754. +212900. (B1950) Spatial mode : Integrated from scans; Beam filling or dilution corrected Notes : From new raw data Qualifiers :

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