NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-25 T19:38:17 PDT
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Spectral Energy Distribution (SED) for NGC 3817:

2 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 m_p 14.4 +/- 0.4 mag 6.81E+14 7.40E-03 +/- 3.30E-03 Jy Broad-band 1961CGCG1.C...0000Z 1
2 HI (21 cm line) 1.09 +/- 0.23 Jy km s^-1^ 1.42E+09 5.04E+03 +/- 1.06E+03 Jy-Hz Line 1989H&RHI.C...0000H 2


Detailed Information for Each Entry

 No. 1
Reference Code : 1961CGCG1.C...0000Z
Freq. targeted : m_p                 
Measurement    :  14.4        mag                  = 7.40E-29 W m^-2^ Hz^-1^
Uncertainty    :  0.4         mag                  = 3.30E-29
Significance   : rms noise
Freq or Vel.   : 4400         A            (OBS   )= 6.81E+14 Hz
Frequency mode : Broad-band measurement
Coord. targeted: 113918.0        +103500. (B1950)
Spatial mode   : Estimated by eye
Notes          : From new raw data
Qualifiers     :                                         

No. 2 Reference Code : 1989H&RHI.C...0000H Freq. targeted : HI (21 cm line) Measurement : 1.09 Jy km s^-1^ = 5.04E-23 W m^-2^ Uncertainty : 0.23 Jy km s^-1^ = 1.06E-23 Significance : no uncertainty reported Freq or Vel. : 21 cm (REST )= 1.42E+09 Hz Frequency mode : Line measurement; flux integrated over line; lines measured in emission Coord. targeted: 113918. +103454. (B1950) Spatial mode : Not reported in paper Notes : Transformed from previously published data Qualifiers :

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