NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-08-21 T17:34:33 PDT
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Spectral Energy Distribution (SED) for PKS 1821-525:

17 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 0.1-100 GeV (Fermi) 18.5E-12 +/- 1.8E-12 erg/cm^2^/s 1.21E+25 1.53E-13 +/- 1.49E-14 Jy Broad-band Variable 2012ApJS..199...31N 1
2 J (2MASS/CTIO) 16.375 +/- 0.148 mag 2.43E+14 4.49E-04 +/- 6.12E-05 Jy Broad-band Profile-fit 2006AJ....131.1163S 2
3 J (2MASS/CTIO) 16.547 +/- 0.269 mag 2.43E+14 3.83E-04 +/- 9.50E-05 Jy Broad-band 4" aperture 2006AJ....131.1163S 3
4 H (2MASS/CTIO) 15.728 +/- 0.164 mag 1.80E+14 5.24E-04 +/- 7.91E-05 Jy Broad-band Profile-fit 2006AJ....131.1163S 4
5 H (2MASS/CTIO) 15.263 +/- 0.085 mag 1.80E+14 8.04E-04 +/- 6.29E-05 Jy Broad-band 4" aperture 2006AJ....131.1163S 5
6 K_s (2MASS/CTIO) 14.716 +/- 0.071 mag 1.39E+14 8.66E-04 +/- 5.66E-05 Jy Broad-band 4" aperture 2006AJ....131.1163S 6
7 K_s (2MASS/CTIO) 14.732 +/- 0.121 mag 1.39E+14 8.53E-04 +/- 9.51E-05 Jy Broad-band Profile-fit 2006AJ....131.1163S 7
8 20 GHz (ATCA) 271 +/- 14 milliJy 1.99E+10 2.71E-01 +/- 1.40E-02 Jy Broad-band 2010MNRAS.402.2403M 8
9 8.4 GHz 309.0 ... milliJy 8.40E+09 3.09E-01 ... Jy Broad-band 2007ApJS..171...61H 9
10 8 GHz (ATCA) 265 +/- 13 milliJy 8.00E+09 2.65E-01 +/- 1.30E-02 Jy Broad-band 2010MNRAS.402.2403M 10
11 5000 MHz 0.280 ... Jy 5.00E+09 2.80E-01 ... Jy Broad-band 1990PKS90.C...0000W 11
12 5 GHz (ATCA) 273 +/- 14 milliJy 5.00E+09 2.73E-01 +/- 1.40E-02 Jy Broad-band 2010MNRAS.402.2403M 12
13 4.85 GHz 356 +/- 20 milliJy 4.85E+09 3.56E-01 +/- 2.00E-02 Jy Broad-band 1994ApJS...91..111W 13
14 4.85 GHz 326 +/- 18 milliJy 4.85E+09 3.26E-01 +/- 1.80E-02 Jy Broad-band 1994ApJS...90..173G 14
15 2700 MHz 0.320 ... Jy 2.70E+09 3.20E-01 ... Jy Broad-band 1990PKS90.C...0000W 15
16 843 MHz 483.7 +/- 14.6 milliJy 8.43E+08 4.84E-01 +/- 1.46E-02 Jy Broad-band 2003MNRAS.342.1117M 16
17 843 MHz (SUMSS) 483.7 +/- 14.6 milliJy 8.43E+08 4.84E-01 +/- 1.46E-02 Jy Broad-band 2008SUMSS.2.1.....: 17


Detailed Information for Each Entry

 No. 1
Reference Code : 2012ApJS..199...31N
Freq. targeted : 0.1-100 GeV (Fermi) 
Measurement    :  18.5E-12    erg/cm^2^/s          = 1.85E-14 W m^-2^
Uncertainty    :  1.8E-12     erg/cm^2^/s          = 1.80E-15
Significance   : 1 sigma
Freq or Vel.   :      50.05   GeV          (OBS   )= 1.21E+25 Hz
Frequency mode : Broad-band measurement
Coord. targeted: 276.287         -52.530 (J2000)
Spatial mode   : Modelled datum
Notes          : From new raw data; NED frequency assigned to mid-point of
                 band in keV
Qualifiers     : Variable                                

No. 2 Reference Code : 2006AJ....131.1163S Freq. targeted : J (2MASS/CTIO) Measurement : 16.375 mag = 4.49E-30 W m^-2^ Hz^-1^ Uncertainty : 0.148 mag = 6.12E-31 Significance : uncertainty Freq or Vel. : 1.235 microns (OBS )= 2.43E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: Spatial mode : Flux in fixed aperture Notes : From new raw data Qualifiers : Profile-fit
No. 3 Reference Code : 2006AJ....131.1163S Freq. targeted : J (2MASS/CTIO) Measurement : 16.547 mag = 3.83E-30 W m^-2^ Hz^-1^ Uncertainty : 0.269 mag = 9.50E-31 Significance : uncertainty Freq or Vel. : 1.235 microns (OBS )= 2.43E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: Spatial mode : Flux in fixed aperture Notes : From new raw data Qualifiers : 4" aperture
No. 4 Reference Code : 2006AJ....131.1163S Freq. targeted : H (2MASS/CTIO) Measurement : 15.728 mag = 5.24E-30 W m^-2^ Hz^-1^ Uncertainty : 0.164 mag = 7.91E-31 Significance : uncertainty Freq or Vel. : 1.662 microns (OBS )= 1.80E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: Spatial mode : Flux in fixed aperture Notes : From new raw data Qualifiers : Profile-fit
No. 5 Reference Code : 2006AJ....131.1163S Freq. targeted : H (2MASS/CTIO) Measurement : 15.263 mag = 8.04E-30 W m^-2^ Hz^-1^ Uncertainty : 0.085 mag = 6.29E-31 Significance : uncertainty Freq or Vel. : 1.662 microns (OBS )= 1.80E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: Spatial mode : Flux in fixed aperture Notes : From new raw data Qualifiers : 4" aperture
No. 6 Reference Code : 2006AJ....131.1163S Freq. targeted : K_s (2MASS/CTIO) Measurement : 14.716 mag = 8.66E-30 W m^-2^ Hz^-1^ Uncertainty : 0.071 mag = 5.66E-31 Significance : uncertainty Freq or Vel. : 2.159 microns (OBS )= 1.39E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: Spatial mode : Flux in fixed aperture Notes : From new raw data Qualifiers : 4" aperture
No. 7 Reference Code : 2006AJ....131.1163S Freq. targeted : K_s (2MASS/CTIO) Measurement : 14.732 mag = 8.53E-30 W m^-2^ Hz^-1^ Uncertainty : 0.121 mag = 9.51E-31 Significance : uncertainty Freq or Vel. : 2.159 microns (OBS )= 1.39E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: Spatial mode : Flux in fixed aperture Notes : From new raw data Qualifiers : Profile-fit
No. 8 Reference Code : 2010MNRAS.402.2403M Freq. targeted : 20 GHz (ATCA) Measurement : 271 milliJy = 2.71E-27 W m^-2^ Hz^-1^ Uncertainty : 14 milliJy = 1.40E-28 Significance : rms uncertainty Freq or Vel. : 19.904 GHz (OBS )= 1.99E+10 Hz Frequency mode : Broad-band measurement Coord. targeted: 18 25 13.82 -52 30 59.9 (J2000) Spatial mode : Flux integrated from map Notes : From new raw data Qualifiers :
No. 9 Reference Code : 2007ApJS..171...61H Freq. targeted : 8.4 GHz Measurement : 309.0 milliJy = 3.09E-27 W m^-2^ Hz^-1^ Uncertainty : milliJy = 0.00E+00 Significance : no uncertainty reported Freq or Vel. : 8.4 GHz (OBS )= 8.40E+09 Hz Frequency mode : Broad-band measurement Coord. targeted: 18 25 13.89 -52 30 59.2 (J2000) Spatial mode : Flux integrated from map Notes : Averaged from previously published data Qualifiers :
No. 10 Reference Code : 2010MNRAS.402.2403M Freq. targeted : 8 GHz (ATCA) Measurement : 265 milliJy = 2.65E-27 W m^-2^ Hz^-1^ Uncertainty : 13 milliJy = 1.30E-28 Significance : rms uncertainty Freq or Vel. : 8 GHz (OBS )= 8.00E+09 Hz Frequency mode : Broad-band measurement Coord. targeted: 18 25 13.82 -52 30 59.9 (J2000) Spatial mode : Flux integrated from map Notes : From new raw data Qualifiers :
No. 11 Reference Code : 1990PKS90.C...0000W Freq. targeted : 5000 MHz Measurement : 0.280 Jy = 2.80E-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: 18 21 13.3 -52 32 40 (B1950) Spatial mode : Integrated from scans Notes : Homogenized from new and previously published data Qualifiers :
No. 12 Reference Code : 2010MNRAS.402.2403M Freq. targeted : 5 GHz (ATCA) Measurement : 273 milliJy = 2.73E-27 W m^-2^ Hz^-1^ Uncertainty : 14 milliJy = 1.40E-28 Significance : rms uncertainty Freq or Vel. : 5 GHz (OBS )= 5.00E+09 Hz Frequency mode : Broad-band measurement Coord. targeted: 18 25 13.82 -52 30 59.9 (J2000) Spatial mode : Flux integrated from map Notes : From new raw data Qualifiers :
No. 13 Reference Code : 1994ApJS...91..111W Freq. targeted : 4.85 GHz Measurement : 356 milliJy = 3.56E-27 W m^-2^ Hz^-1^ Uncertainty : 20 milliJy = 2.00E-28 Significance : rms noise Freq or Vel. : 4.85 GHz (OBS )= 4.85E+09 Hz Frequency mode : Broad-band measurement Coord. targeted: 182513.8 -523108 (J2000) Spatial mode : Modelled datum Notes : From new raw data; Corrected for contaminating sources Qualifiers :
No. 14 Reference Code : 1994ApJS...90..173G Freq. targeted : 4.85 GHz Measurement : 326 milliJy = 3.26E-27 W m^-2^ Hz^-1^ Uncertainty : 18 milliJy = 1.80E-28 Significance : rms noise Freq or Vel. : 4.85 GHz (OBS )= 4.85E+09 Hz Frequency mode : Broad-band measurement Coord. targeted: 182113.0 -523246 (B1950) Spatial mode : Modelled datum Notes : From new raw data; Corrected for contaminating sources Qualifiers :
No. 15 Reference Code : 1990PKS90.C...0000W Freq. targeted : 2700 MHz Measurement : 0.320 Jy = 3.20E-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: 18 21 13.3 -52 32 40 (B1950) Spatial mode : Integrated from scans Notes : Homogenized from new and previously published data Qualifiers :
No. 16 Reference Code : 2003MNRAS.342.1117M Freq. targeted : 843 MHz Measurement : 483.7 milliJy = 4.84E-27 W m^-2^ Hz^-1^ Uncertainty : 14.6 milliJy = 1.46E-28 Significance : uncertainty Freq or Vel. : 843 MHz (OBS )= 8.43E+08 Hz Frequency mode : Broad-band measurement Coord. targeted: 182513.71 -523057.6 (J2000) Spatial mode : Flux integrated from map Notes : From new raw data Qualifiers :
No. 17 Reference Code : 2008SUMSS.2.1.....: Freq. targeted : 843 MHz (SUMSS) Measurement : 483.7 milliJy = 4.84E-27 W m^-2^ Hz^-1^ Uncertainty : 14.6 milliJy = 1.46E-28 Significance : uncertainty Freq or Vel. : 843 MHz (OBS )= 8.43E+08 Hz Frequency mode : Broad-band measurement Coord. targeted: 182513.71 -523057.6 (J2000) Spatial mode : Flux integrated from map Notes : From new raw data Qualifiers :

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