NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-19 T03:33:31 PDT
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Spectral Energy Distribution (SED) for NGC 2521:

21 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 U (U_T) 14.32 +/- 0.32 mag 8.19E+14 3.39E-03 +/- 1.17E-03 Jy Broad-band 1991RC3.9.C...0000d 1
2 U (U_T^0) 14.15 ... mag 8.19E+14 3.96E-03 ... Jy Broad-band 1991RC3.9.C...0000d 2
3 B (B_T) 13.80 +/- 0.30 mag 6.81E+14 1.29E-02 +/- 4.09E-03 Jy Broad-band 1991RC3.9.C...0000d 3
4 B (B_T^0) 13.62 ... mag 6.81E+14 1.52E-02 ... Jy Broad-band 1991RC3.9.C...0000d 4
5 V (V_T^0) 12.73 ... mag 5.42E+14 2.95E-02 ... Jy Broad-band 1991RC3.9.C...0000d 5
6 V (V_T) 12.84 +/- 0.31 mag 5.42E+14 2.66E-02 +/- 8.66E-03 Jy Broad-band 1991RC3.9.C...0000d 6
7 J (2MASS/FLWO) 12.711 +/- 0.059 mag 2.43E+14 1.31E-02 +/- 7.13E-04 Jy Broad-band Profile-fit; Poor quality 2006AJ....131.1163S 7
8 J (2MASS/FLWO) 12.198 +/- 0.008 mag 2.43E+14 2.11E-02 +/- 1.55E-04 Jy Broad-band 4" aperture 2006AJ....131.1163S 8
9 J 10.734 +/- 0.021 mag 2.40E+14 8.10E-02 +/- 1.58E-03 Jy Broad-band 20032MASX.C.......: 9
10 J_14arcsec (2MASS) 11.726 +/- 0.005 mag 2.40E+14 3.25E-02 +/- 1.50E-04 Jy Broad-band 14.0 x 14.0 arcsec aperture. 20032MASX.C.......: 10
11 J 10.924 +/- 0.017 mag 2.40E+14 6.80E-02 +/- 1.07E-03 Jy Broad-band 56.6 x 49.8 arcsec integration area. 20032MASX.C.......: 11
12 H_14arcsec (2MASS) 11.004 +/- 0.006 mag 1.82E+14 4.06E-02 +/- 2.25E-04 Jy Broad-band 14.0 x 14.0 arcsec aperture. 20032MASX.C.......: 12
13 H 10.022 +/- 0.021 mag 1.82E+14 1.00E-01 +/- 1.96E-03 Jy Broad-band 20032MASX.C.......: 13
14 H 10.201 +/- 0.022 mag 1.82E+14 8.51E-02 +/- 1.74E-03 Jy Broad-band 56.6 x 49.8 arcsec integration area. 20032MASX.C.......: 14
15 H (2MASS/FLWO) 12.063 +/- 0.074 mag 1.80E+14 1.53E-02 +/- 1.04E-03 Jy Broad-band Profile-fit; Poor quality 2006AJ....131.1163S 15
16 H (2MASS/FLWO) 11.462 +/- 0.006 mag 1.80E+14 2.66E-02 +/- 1.47E-04 Jy Broad-band 4" aperture 2006AJ....131.1163S 16
17 K_s (2MASS/FLWO) 11.182 +/- 0.01 mag 1.39E+14 2.24E-02 +/- 2.07E-04 Jy Broad-band 4" aperture 2006AJ....131.1163S 17
18 K_s (2MASS/FLWO) 11.498 +/- 0.041 mag 1.39E+14 1.68E-02 +/- 6.34E-04 Jy Broad-band Profile-fit; Poor quality 2006AJ....131.1163S 18
19 K_s 9.922 +/- 0.034 mag 1.38E+14 7.16E-02 +/- 2.28E-03 Jy Broad-band 56.6 x 49.8 arcsec integration area. 20032MASX.C.......: 19
20 K_s 9.733 +/- 0.032 mag 1.38E+14 8.53E-02 +/- 2.55E-03 Jy Broad-band 20032MASX.C.......: 20
21 K_s_14arcsec (2MASS) 10.728 +/- 0.009 mag 1.38E+14 3.41E-02 +/- 2.84E-04 Jy Broad-band 14.0 x 14.0 arcsec aperture. 20032MASX.C.......: 21


Detailed Information for Each Entry

 No. 1
Reference Code : 1991RC3.9.C...0000d
Freq. targeted : U (U_T)             
Measurement    :  14.32       mag                  = 3.39E-29 W m^-2^ Hz^-1^
Uncertainty    :  0.32        mag                  = 1.17E-29
Significance   : rms uncertainty
Freq or Vel.   : 3660         A            (OBS   )= 8.19E+14 Hz
Frequency mode : Broad-band measurement
Coord. targeted: 080445.8        +575458 (B1950)
Spatial mode   : From multi-aperture data
Notes          : Homogenized from new and previously published data; Standard
                 Johnson UBVRI filters assumed
Qualifiers     :                                         

No. 2 Reference Code : 1991RC3.9.C...0000d Freq. targeted : U (U_T^0) Measurement : 14.15 mag = 3.96E-29 W m^-2^ Hz^-1^ Uncertainty : mag = 0.00E+00 Significance : no uncertainty reported Freq or Vel. : 3660 A (OBS )= 8.19E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 080445.8 +575458 (B1950) Spatial mode : From multi-aperture data Notes : Homogenized from new and previously published data; Extinction-corrected for internal and Milky Way and K-correction applied; Standard Johnson UBVRI filters assumed Qualifiers :
No. 3 Reference Code : 1991RC3.9.C...0000d Freq. targeted : B (B_T) Measurement : 13.80 mag = 1.29E-28 W m^-2^ Hz^-1^ Uncertainty : 0.30 mag = 4.09E-29 Significance : rms uncertainty Freq or Vel. : 4400 A (OBS )= 6.81E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 080445.8 +575458 (B1950) Spatial mode : From multi-aperture data Notes : Homogenized from new and previously published data; Standard Johnson UBVRI filters assumed Qualifiers :
No. 4 Reference Code : 1991RC3.9.C...0000d Freq. targeted : B (B_T^0) Measurement : 13.62 mag = 1.52E-28 W m^-2^ Hz^-1^ Uncertainty : mag = 0.00E+00 Significance : no uncertainty reported Freq or Vel. : 4400 A (OBS )= 6.81E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 080445.8 +575458 (B1950) Spatial mode : From multi-aperture data Notes : Homogenized from new and previously published data; Extinction-corrected for internal and Milky Way and K-correction applied; Standard Johnson UBVRI filters assumed Qualifiers :
No. 5 Reference Code : 1991RC3.9.C...0000d Freq. targeted : V (V_T^0) Measurement : 12.73 mag = 2.95E-28 W m^-2^ Hz^-1^ Uncertainty : mag = 0.00E+00 Significance : no uncertainty reported Freq or Vel. : 5530 A (OBS )= 5.42E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 080445.8 +575458 (B1950) Spatial mode : From multi-aperture data Notes : Homogenized from new and previously published data; Extinction-corrected for internal and Milky Way and K-correction applied; Standard Johnson UBVRI filters assumed Qualifiers :
No. 6 Reference Code : 1991RC3.9.C...0000d Freq. targeted : V (V_T) Measurement : 12.84 mag = 2.66E-28 W m^-2^ Hz^-1^ Uncertainty : 0.31 mag = 8.66E-29 Significance : rms uncertainty Freq or Vel. : 5530 A (OBS )= 5.42E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 080445.8 +575458 (B1950) Spatial mode : From multi-aperture data Notes : Homogenized from new and previously published data; Standard Johnson UBVRI filters assumed Qualifiers :
No. 7 Reference Code : 2006AJ....131.1163S Freq. targeted : J (2MASS/FLWO) Measurement : 12.711 mag = 1.31E-28 W m^-2^ Hz^-1^ Uncertainty : 0.059 mag = 7.13E-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 : Profile-fit; Poor quality
No. 8 Reference Code : 2006AJ....131.1163S Freq. targeted : J (2MASS/FLWO) Measurement : 12.198 mag = 2.11E-28 W m^-2^ Hz^-1^ Uncertainty : 0.008 mag = 1.55E-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. 9 Reference Code : 20032MASX.C.......: Freq. targeted : J Measurement : 10.734 mag = 8.10E-28 W m^-2^ Hz^-1^ Uncertainty : 0.021 mag = 1.58E-29 Significance : 1 sigma uncert. Freq or Vel. : 1.25 microns (OBS )= 2.40E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 080849.37 +574610.6 (J2000) Spatial mode : Flux in fixed aperture Notes : From new raw data Qualifiers :
No. 10 Reference Code : 20032MASX.C.......: Freq. targeted : J_14arcsec (2MASS) Measurement : 11.726 mag = 3.25E-28 W m^-2^ Hz^-1^ Uncertainty : 0.005 mag = 1.50E-30 Significance : 1 sigma uncert. Freq or Vel. : 1.25 microns (OBS )= 2.40E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 080849.37 +574610.6 (J2000) Spatial mode : Flux in fixed aperture Notes : From new raw data; Corrected for contaminating sources Qualifiers : 14.0 x 14.0 arcsec aperture.
No. 11 Reference Code : 20032MASX.C.......: Freq. targeted : J Measurement : 10.924 mag = 6.80E-28 W m^-2^ Hz^-1^ Uncertainty : 0.017 mag = 1.07E-29 Significance : 1 sigma uncert. Freq or Vel. : 1.25 microns (OBS )= 2.40E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 080849.37 +574610.6 (J2000) Spatial mode : Flux in fixed aperture Notes : From new raw data; Corrected for contaminating sources Qualifiers : 56.6 x 49.8 arcsec integration area.
No. 12 Reference Code : 20032MASX.C.......: Freq. targeted : H_14arcsec (2MASS) Measurement : 11.004 mag = 4.06E-28 W m^-2^ Hz^-1^ Uncertainty : 0.006 mag = 2.25E-30 Significance : 1 sigma uncert. Freq or Vel. : 1.65 microns (OBS )= 1.82E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 080849.37 +574610.6 (J2000) Spatial mode : Flux in fixed aperture Notes : From new raw data; Corrected for contaminating sources Qualifiers : 14.0 x 14.0 arcsec aperture.
No. 13 Reference Code : 20032MASX.C.......: Freq. targeted : H Measurement : 10.022 mag = 1.00E-27 W m^-2^ Hz^-1^ Uncertainty : 0.021 mag = 1.96E-29 Significance : 1 sigma uncert. Freq or Vel. : 1.65 microns (OBS )= 1.82E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 080849.37 +574610.6 (J2000) Spatial mode : Flux in fixed aperture Notes : From new raw data Qualifiers :
No. 14 Reference Code : 20032MASX.C.......: Freq. targeted : H Measurement : 10.201 mag = 8.51E-28 W m^-2^ Hz^-1^ Uncertainty : 0.022 mag = 1.74E-29 Significance : 1 sigma uncert. Freq or Vel. : 1.65 microns (OBS )= 1.82E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 080849.37 +574610.6 (J2000) Spatial mode : Flux in fixed aperture Notes : From new raw data; Corrected for contaminating sources Qualifiers : 56.6 x 49.8 arcsec integration area.
No. 15 Reference Code : 2006AJ....131.1163S Freq. targeted : H (2MASS/FLWO) Measurement : 12.063 mag = 1.53E-28 W m^-2^ Hz^-1^ Uncertainty : 0.074 mag = 1.04E-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. 16 Reference Code : 2006AJ....131.1163S Freq. targeted : H (2MASS/FLWO) Measurement : 11.462 mag = 2.66E-28 W m^-2^ Hz^-1^ Uncertainty : 0.006 mag = 1.47E-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. 17 Reference Code : 2006AJ....131.1163S Freq. targeted : K_s (2MASS/FLWO) Measurement : 11.182 mag = 2.24E-28 W m^-2^ Hz^-1^ Uncertainty : 0.01 mag = 2.07E-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. 18 Reference Code : 2006AJ....131.1163S Freq. targeted : K_s (2MASS/FLWO) Measurement : 11.498 mag = 1.68E-28 W m^-2^ Hz^-1^ Uncertainty : 0.041 mag = 6.34E-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 : Profile-fit; Poor quality
No. 19 Reference Code : 20032MASX.C.......: Freq. targeted : K_s Measurement : 9.922 mag = 7.16E-28 W m^-2^ Hz^-1^ Uncertainty : 0.034 mag = 2.28E-29 Significance : 1 sigma uncert. Freq or Vel. : 2.17 microns (OBS )= 1.38E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 080849.37 +574610.6 (J2000) Spatial mode : Flux in fixed aperture Notes : From new raw data; Corrected for contaminating sources Qualifiers : 56.6 x 49.8 arcsec integration area.
No. 20 Reference Code : 20032MASX.C.......: Freq. targeted : K_s Measurement : 9.733 mag = 8.53E-28 W m^-2^ Hz^-1^ Uncertainty : 0.032 mag = 2.55E-29 Significance : 1 sigma uncert. Freq or Vel. : 2.17 microns (OBS )= 1.38E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 080849.37 +574610.6 (J2000) Spatial mode : Flux in fixed aperture Notes : From new raw data Qualifiers :
No. 21 Reference Code : 20032MASX.C.......: Freq. targeted : K_s_14arcsec (2MASS) Measurement : 10.728 mag = 3.41E-28 W m^-2^ Hz^-1^ Uncertainty : 0.009 mag = 2.84E-30 Significance : 1 sigma uncert. Freq or Vel. : 2.17 microns (OBS )= 1.38E+14 Hz Frequency mode : Broad-band measurement Coord. targeted: 080849.37 +574610.6 (J2000) Spatial mode : Flux in fixed aperture Notes : From new raw data; Corrected for contaminating sources Qualifiers : 14.0 x 14.0 arcsec aperture.

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