NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-23 T04:12:05 PDT
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Spectral Energy Distribution (SED) for NGC 1721:

19 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 J (2MASS/CTIO) 11.694 +/- 0.01 mag 2.43E+14 3.35E-02 +/- 3.08E-04 Jy Broad-band 4" aperture 2006AJ....131.1163S 1
2 J (2MASS/CTIO) 12.439 +/- 0.097 mag 2.43E+14 1.69E-02 +/- 1.51E-03 Jy Broad-band Profile-fit; Poor quality 2006AJ....131.1163S 2
3 J 10.393 +/- 0.015 mag 2.40E+14 1.11E-01 +/- 1.54E-03 Jy Broad-band 75.6 x 45.4 arcsec integration area. 20032MASX.C.......: 3
4 J 10.205 +/- 0.015 mag 2.40E+14 1.32E-01 +/- 1.83E-03 Jy Broad-band 20032MASX.C.......: 4
5 J_14arcsec (2MASS) 11.166 +/- 0.004 mag 2.40E+14 5.44E-02 +/- 2.01E-04 Jy Broad-band 14.0 x 14.0 arcsec aperture. 20032MASX.C.......: 5
6 H 9.667 +/- 0.019 mag 1.82E+14 1.39E-01 +/- 2.46E-03 Jy Broad-band 75.6 x 45.4 arcsec integration area. 20032MASX.C.......: 6
7 H 9.541 +/- 0.018 mag 1.82E+14 1.56E-01 +/- 2.61E-03 Jy Broad-band 20032MASX.C.......: 7
8 H_14arcsec (2MASS) 10.427 +/- 0.004 mag 1.82E+14 6.91E-02 +/- 2.55E-04 Jy Broad-band 14.0 x 14.0 arcsec aperture. 20032MASX.C.......: 8
9 H (2MASS/CTIO) 10.938 +/- 0.004 mag 1.80E+14 4.32E-02 +/- 1.59E-04 Jy Broad-band 4" aperture 2006AJ....131.1163S 9
10 H (2MASS/CTIO) 11.794 +/- 0.14 mag 1.80E+14 1.96E-02 +/- 2.53E-03 Jy Broad-band Profile-fit; Poor quality 2006AJ....131.1163S 10
11 K_s (2MASS/CTIO) 10.633 +/- 0.012 mag 1.39E+14 3.72E-02 +/- 4.11E-04 Jy Broad-band 4" aperture 2006AJ....131.1163S 11
12 K_s (2MASS/CTIO) 11.047 +/- 0.063 mag 1.39E+14 2.54E-02 +/- 1.48E-03 Jy Broad-band Profile-fit; Poor quality 2006AJ....131.1163S 12
13 K_s_14arcsec (2MASS) 10.117 +/- 0.006 mag 1.38E+14 5.99E-02 +/- 3.32E-04 Jy Broad-band 14.0 x 14.0 arcsec aperture. 20032MASX.C.......: 13
14 K_s 9.385 +/- 0.027 mag 1.38E+14 1.17E-01 +/- 2.96E-03 Jy Broad-band 75.6 x 45.4 arcsec integration area. 20032MASX.C.......: 14
15 K_s 9.293 +/- 0.026 mag 1.38E+14 1.28E-01 +/- 3.10E-03 Jy Broad-band 20032MASX.C.......: 15
16 12 microns (IRAS) 1.002E-01 +/- 27 % Jy 2.50E+13 1.00E-01 +/- 2.71E-02 Jy Broad-band IRAS quality flag = 2 1990IRASF.C...0000M 16
17 25 microns (IRAS) ... <1.271E-01 Jy 1.20E+13 < 1.27E-01 Jy Broad-band 1990IRASF.C...0000M 17
18 60 microns (IRAS) 1.152E+00 +/- 7 % Jy 5.00E+12 1.15E+00 +/- 8.06E-02 Jy Broad-band IRAS quality flag = 3 1990IRASF.C...0000M 18
19 100 microns (IRAS) 3.764E+00 +/- 13 % Jy 3.00E+12 3.76E+00 +/- 4.89E-01 Jy Broad-band IRAS quality flag = 2 1990IRASF.C...0000M 19


Detailed Information for Each Entry

 No. 1
Reference Code : 2006AJ....131.1163S
Freq. targeted : J (2MASS/CTIO)      
Measurement    :  11.694      mag                  = 3.35E-28 W m^-2^ Hz^-1^
Uncertainty    :  0.01        mag                  = 3.08E-30
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. 2 Reference Code : 2006AJ....131.1163S Freq. targeted : J (2MASS/CTIO) Measurement : 12.439 mag = 1.69E-28 W m^-2^ Hz^-1^ Uncertainty : 0.097 mag = 1.51E-29 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; Poor quality
No. 3 Reference Code : 20032MASX.C.......: Freq. targeted : J Measurement : 10.393 mag = 1.11E-27 W m^-2^ Hz^-1^ Uncertainty : 0.015 mag = 1.54E-29 Significance : 1 sigma uncert. Freq or Vel. : 1.25 microns (OBS )= 2.40E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 045917.38 -110707.2 (J2000) Spatial mode : Flux in fixed aperture Notes : From new raw data; Corrected for contaminating sources Qualifiers : 75.6 x 45.4 arcsec integration area.
No. 4 Reference Code : 20032MASX.C.......: Freq. targeted : J Measurement : 10.205 mag = 1.32E-27 W m^-2^ Hz^-1^ Uncertainty : 0.015 mag = 1.83E-29 Significance : 1 sigma uncert. Freq or Vel. : 1.25 microns (OBS )= 2.40E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 045917.38 -110707.2 (J2000) Spatial mode : Flux in fixed aperture Notes : From new raw data Qualifiers :
No. 5 Reference Code : 20032MASX.C.......: Freq. targeted : J_14arcsec (2MASS) Measurement : 11.166 mag = 5.44E-28 W m^-2^ Hz^-1^ Uncertainty : 0.004 mag = 2.01E-30 Significance : 1 sigma uncert. Freq or Vel. : 1.25 microns (OBS )= 2.40E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 045917.38 -110707.2 (J2000) Spatial mode : Flux in fixed aperture Notes : From new raw data Qualifiers : 14.0 x 14.0 arcsec aperture.
No. 6 Reference Code : 20032MASX.C.......: Freq. targeted : H Measurement : 9.667 mag = 1.39E-27 W m^-2^ Hz^-1^ Uncertainty : 0.019 mag = 2.46E-29 Significance : 1 sigma uncert. Freq or Vel. : 1.65 microns (OBS )= 1.82E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 045917.38 -110707.2 (J2000) Spatial mode : Flux in fixed aperture Notes : From new raw data; Corrected for contaminating sources Qualifiers : 75.6 x 45.4 arcsec integration area.
No. 7 Reference Code : 20032MASX.C.......: Freq. targeted : H Measurement : 9.541 mag = 1.56E-27 W m^-2^ Hz^-1^ Uncertainty : 0.018 mag = 2.61E-29 Significance : 1 sigma uncert. Freq or Vel. : 1.65 microns (OBS )= 1.82E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 045917.38 -110707.2 (J2000) Spatial mode : Flux in fixed aperture Notes : From new raw data Qualifiers :
No. 8 Reference Code : 20032MASX.C.......: Freq. targeted : H_14arcsec (2MASS) Measurement : 10.427 mag = 6.91E-28 W m^-2^ Hz^-1^ Uncertainty : 0.004 mag = 2.55E-30 Significance : 1 sigma uncert. Freq or Vel. : 1.65 microns (OBS )= 1.82E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 045917.38 -110707.2 (J2000) Spatial mode : Flux in fixed aperture Notes : From new raw data Qualifiers : 14.0 x 14.0 arcsec aperture.
No. 9 Reference Code : 2006AJ....131.1163S Freq. targeted : H (2MASS/CTIO) Measurement : 10.938 mag = 4.32E-28 W m^-2^ Hz^-1^ Uncertainty : 0.004 mag = 1.59E-30 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. 10 Reference Code : 2006AJ....131.1163S Freq. targeted : H (2MASS/CTIO) Measurement : 11.794 mag = 1.96E-28 W m^-2^ Hz^-1^ Uncertainty : 0.14 mag = 2.53E-29 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; Poor quality
No. 11 Reference Code : 2006AJ....131.1163S Freq. targeted : K_s (2MASS/CTIO) Measurement : 10.633 mag = 3.72E-28 W m^-2^ Hz^-1^ Uncertainty : 0.012 mag = 4.11E-30 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. 12 Reference Code : 2006AJ....131.1163S Freq. targeted : K_s (2MASS/CTIO) Measurement : 11.047 mag = 2.54E-28 W m^-2^ Hz^-1^ Uncertainty : 0.063 mag = 1.48E-29 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; Poor quality
No. 13 Reference Code : 20032MASX.C.......: Freq. targeted : K_s_14arcsec (2MASS) Measurement : 10.117 mag = 5.99E-28 W m^-2^ Hz^-1^ Uncertainty : 0.006 mag = 3.32E-30 Significance : 1 sigma uncert. Freq or Vel. : 2.17 microns (OBS )= 1.38E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 045917.38 -110707.2 (J2000) Spatial mode : Flux in fixed aperture Notes : From new raw data Qualifiers : 14.0 x 14.0 arcsec aperture.
No. 14 Reference Code : 20032MASX.C.......: Freq. targeted : K_s Measurement : 9.385 mag = 1.17E-27 W m^-2^ Hz^-1^ Uncertainty : 0.027 mag = 2.96E-29 Significance : 1 sigma uncert. Freq or Vel. : 2.17 microns (OBS )= 1.38E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 045917.38 -110707.2 (J2000) Spatial mode : Flux in fixed aperture Notes : From new raw data; Corrected for contaminating sources Qualifiers : 75.6 x 45.4 arcsec integration area.
No. 15 Reference Code : 20032MASX.C.......: Freq. targeted : K_s Measurement : 9.293 mag = 1.28E-27 W m^-2^ Hz^-1^ Uncertainty : 0.026 mag = 3.10E-29 Significance : 1 sigma uncert. Freq or Vel. : 2.17 microns (OBS )= 1.38E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 045917.38 -110707.2 (J2000) Spatial mode : Flux in fixed aperture Notes : From new raw data Qualifiers :
No. 16 Reference Code : 1990IRASF.C...0000M Freq. targeted : 12 microns (IRAS) Measurement : 1.002E-01 Jy = 1.00E-27 W m^-2^ Hz^-1^ Uncertainty : 27 % Jy = 2.71E-28 Significance : uncertainty Freq or Vel. : 12 microns (OBS )= 2.50E+13 Hz Frequency mode : Broad-band measurement Coord. targeted: 045658.2 -111144 (B1950) Spatial mode : Flux in fixed aperture Notes : From new raw data Qualifiers : IRAS quality flag = 2
No. 17 Reference Code : 1990IRASF.C...0000M Freq. targeted : 25 microns (IRAS) Measurement : <1.271E-01 Jy < 1.27E-27 W m^-2^ Hz^-1^ Uncertainty : Significance : 90% confidence Freq or Vel. : 25 microns (OBS )= 1.20E+13 Hz Frequency mode : Broad-band measurement Coord. targeted: 045658.2 -111144 (B1950) Spatial mode : Flux in fixed aperture Notes : From new raw data Qualifiers :
No. 18 Reference Code : 1990IRASF.C...0000M Freq. targeted : 60 microns (IRAS) Measurement : 1.152E+00 Jy = 1.15E-26 W m^-2^ Hz^-1^ Uncertainty : 7 % Jy = 8.06E-28 Significance : uncertainty Freq or Vel. : 60 microns (OBS )= 5.00E+12 Hz Frequency mode : Broad-band measurement Coord. targeted: 045658.2 -111144 (B1950) Spatial mode : Flux in fixed aperture Notes : From new raw data Qualifiers : IRAS quality flag = 3
No. 19 Reference Code : 1990IRASF.C...0000M Freq. targeted : 100 microns (IRAS) Measurement : 3.764E+00 Jy = 3.76E-26 W m^-2^ Hz^-1^ Uncertainty : 13 % Jy = 4.89E-27 Significance : uncertainty Freq or Vel. : 100 microns (OBS )= 3.00E+12 Hz Frequency mode : Broad-band measurement Coord. targeted: 045658.2 -111144 (B1950) Spatial mode : Flux in fixed aperture Notes : From new raw data Qualifiers : IRAS quality flag = 2

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