NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-20 T00:38:06 PDT
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Spectral Energy Distribution (SED) for Virgo Cluster:

3 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 2-10 keV (ASCA) 30.0E-13 ... ergs/cm^2^/s 1.45E+18 2.07E-07 ... Jy Broad-band 2004ApJ...609..603H 1
2 0.1-2.4 keV (ROSAT) 821.10 +/- 2.1 % 10^-12^ erg/cm^2^/s 3.15E+17 2.61E-04 +/- 5.56E-06 Jy Broad-band 1998MNRAS.301..881E 2
3 0.1-2.4 keV (ROSAT) 1821.1E-12 +/- 38.8E-12 erg/cm^2^/s 3.02E+17 6.03E-04 +/- 1.28E-05 Jy Broad-band 2009ApJ...690..879S 3


Detailed Information for Each Entry

 No. 1
Reference Code : 2004ApJ...609..603H
Freq. targeted : 2-10 keV (ASCA)     
Measurement    :  30.0E-13     ergs/cm^2^/s        = 3.00E-15 W m^-2^
Uncertainty    :               ergs/cm^2^/s        = 0.00E+00
Significance   : no uncertainty reported
Freq or Vel.   :          6   keV          (OBS   )= 1.45E+18 Hz
Frequency mode : Broad-band measurement
Coord. targeted:
Spatial mode   : Total flux
Notes          : From reprocessed raw data; NED frequency assigned to
                 mid-point of band in keV
Qualifiers     :                                         

No. 2 Reference Code : 1998MNRAS.301..881E Freq. targeted : 0.1-2.4 keV (ROSAT) Measurement : 821.10 10^-12^ erg/cm^2^/s = 8.21E-13 W m^-2^ Uncertainty : 2.1 % 10^-12^ erg/cm^2^/s = 1.75E-14 Significance : 1 sigma Freq or Vel. : 1.3 keV (OBS )= 3.15E+17 Hz Frequency mode : Broad-band measurement Coord. targeted: 123047. +122013. (J2000) Spatial mode : Integrated from scans Notes : From reprocessed raw data Qualifiers :
No. 3 Reference Code : 2009ApJ...690..879S Freq. targeted : 0.1-2.4 keV (ROSAT) Measurement : 1821.1E-12 erg/cm^2^/s = 1.82E-12 W m^-2^ Uncertainty : 38.8E-12 erg/cm^2^/s = 3.88E-14 Significance : 1 sigma Freq or Vel. : 1.25 keV (OBS )= 3.02E+17 Hz Frequency mode : Broad-band measurement Coord. targeted: Spatial mode : Flux integrated from map Notes : From reprocessed raw data; NED frequency assigned to mid-point of band in keV Qualifiers :

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