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Date and Time of the Query: 2022-01-25 T12:45:23 PST
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Diameter data point(s) for object 3C 273

Diameter Data --- Published and Homogenized (arcsec) Units

  Published UnitsHomogenized Units
No.Observed Passband
REFCODE
Major Axis
(2a)
Major Axis UnitsMinor Axis
(2b)
Minor Axis UnitsAxis Ratio (b/a)Major Axis Unc.Ellipticity
(1 - b/a)
Eccentricity
[(a/b)2-1]/
[(a/b)2+1]
Position Angle
(deg)
[published]
Reference LevelFrequency (Hz)Major Axis
(2a)
(arcsec)
Major Axis Unc.Axis Ratio (b/a)Ellipticity
(1 - b/a)
Eccentricity
[(a/b)2-1]/
[(a/b)2+1]
cos-1(b/a)
(deg)
Position Angle
(deg)
[J2000]
1 K_s (LGA/2MASS isophotal)
2003AJ....125..525J
8.1 (a) arcsec ... ... 1.000 (b/a) ... ... ... 2.5
[J2000]
20.0 K-mag arcsec^-2^ 1.38E+14 16.20 ... 1.00 0.00 0.00 0 3
[J2000]
2 K_s (LGA/2MASS "total")
2003AJ....125..525J
22.2 (a) arcsec ... ... 1.000 (b/a) ... ... ... 2.5
[J2000]
Diameter for "total" magnitude 1.38E+14 44.40 ... 1.00 0.00 0.00 0 3
[J2000]
3 r (SDSS Isophotal)
2007SDSS6.C...0000:
17.01 (a) arcsec 12.53 arcsec ... ... ... ... 72.8
[J2000]
25.0 mag arcsec^-2^ 4.77E+14 34.02 ... 0.74 0.26 0.30 43 73
[J2000]
4 r (SDSS Petrosian)
2007SDSS6.C...0000:
1.09 (a) arcsec ... ... ... 0.013 ... ... ... ... 4.77E+14 2.19 0.03 ... ... ... ... ...
5 r (SDSS deVaucouleurs)
2007SDSS6.C...0000:
0.6149 (a) arcsec ... ... 0.929 (b/a) 0.009 ... ... 77.6
[J2000]
... 4.77E+14 1.23 0.02 0.93 0.07 0.07 22 78
[J2000]
6 r (SDSS Exponential)
2007SDSS6.C...0000:
0.5861 (a) arcsec ... ... 0.961 (b/a) 0.006 ... ... 110.1
[J2000]
... 4.77E+14 1.17 0.01 0.96 0.04 0.04 16 110
[J2000]
7 0.5-7 keV Chandra
2020CSC...C2..0000:
2.25337339 arcsec 2.25337339 arcsec ... 0.00812000 ... ... 0.0
[J2000]
extent deconvolved with PSF 5.56E+17 2.25 0.01 2.25 -1.25 0.67 0 0
[J2000]
8 0.2-0.5 keV Chandra
2020CSC...C2..0000:
1.24374655 arcsec 1.24374655 arcsec ... 0.00869295 ... ... 0.0
[J2000]
extent deconvolved with PSF 9.67E+16 1.24 0.01 1.24 -0.24 0.21 0 0
[J2000]
9 0.5-1.2 keV Chandra
2020CSC...C2..0000:
3.03599109 arcsec 3.03599109 arcsec ... 0.01909111 ... ... 0.0
[J2000]
extent deconvolved with PSF 2.22E+17 3.04 0.02 3.04 -2.04 0.80 0 0
[J2000]
10 1.2-2 keV Chandra
2020CSC...C2..0000:
3.54923127 arcsec 3.54923127 arcsec ... 0.01891769 ... ... 0.0
[J2000]
extent deconvolved with PSF 3.77E+17 3.55 0.02 3.55 -2.55 0.85 0 0
[J2000]
11 2-7 keV Chandra
2020CSC...C2..0000:
3.71961350 arcsec 3.71961350 arcsec ... 0.03226764 ... ... 0.0
[J2000]
extent deconvolved with PSF 9.19E+17 3.72 0.03 3.72 -2.72 0.87 0 0
[J2000]


Detailed Information for Each Entry

 No. 1
                                Published Units:                    Homogenized Units:

Reference Code                : 2003AJ....125..525J
Published Object Name         : 3C 273                        
Frequency Targeted            : K_s (LGA/2MASS isophotal)     
Major Axis (2a)               : a = 8.1        arcsec               2a = 16.20 arcsec
Uncertainty                   : ...                                 ... 
Minor Axis (2b)               : ...                                 2b = 16.20 arcsec
Uncertainty                   : ...                                 ...
Axis Ratio                    : b/a = 1.000                         b/a = 1.00
Uncertainty                   : ...                                 ...
Ellipticity                   : ...                                 1 - b/a = 0.00
Uncertainty                   : ...                                 ...
Eccentricity                  : ...                                 [(a/b)2-1]/[(a/b)2+1] = 0.00
Uncertainty                   : ...                                 ...
Cos-1(b/a)                    : ...                                 0 deg
Position Angle [Equinox]      :   2.5  deg [J2000]                  3 deg [J2000]
Uncertainty                   : ...                                 ...
Significance                  : No uncertainty reported
Diameter Reference Level      : 20.0 K-mag arcsec^-2^         
Frequency                     : 2.17         microns                1.38E+14 Hz
Frequency Mode                : Broad-band detector (e.g. photographic plate)

Measurement Mode               
    Detector Type             : Maps (e.g., 2MASS, VLA, Sloan)
    Fitting Technique         : Ellipse fitting to image
    Measured Quantity         : Isophotal diameter
    Qualifiers                : A radius is given in DIA_MAJ, not a diameter
Coordinates Targeted          : 187.278122      2.052330    (J2000)
Qualifiers                    : From new, raw data
NED Comment                   :                                         

No. 2 Published Units: Homogenized Units: Reference Code : 2003AJ....125..525J Published Object Name : 3C 273 Frequency Targeted : K_s (LGA/2MASS "total") Major Axis (2a) : a = 22.2 arcsec 2a = 44.40 arcsec Uncertainty : ... ... Minor Axis (2b) : ... 2b = 44.40 arcsec Uncertainty : ... ... Axis Ratio : b/a = 1.000 b/a = 1.00 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.00 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.00 Uncertainty : ... ... Cos-1(b/a) : ... 0 deg Position Angle [Equinox] : 2.5 deg [J2000] 3 deg [J2000] Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : Diameter for "total" magnitude Frequency : 2.17 microns 1.38E+14 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Maps (e.g., 2MASS, VLA, Sloan) Fitting Technique : Ellipse fitting to image Measured Quantity : Isophotal diameter Qualifiers : A radius is given in DIA_MAJ, not a diameter Coordinates Targeted : 187.278122 2.052330 (J2000) Qualifiers : From new, raw data NED Comment :
No. 3 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J122906.69+020308.5 Frequency Targeted : r (SDSS Isophotal) Major Axis (2a) : a = 17.01 arcsec 2a = 34.02 arcsec Uncertainty : ... ... Minor Axis (2b) : b = 12.53 arcsec 2b = 25.06 arcsec Uncertainty : ... ... Axis Ratio : ... b/a = 0.74 Uncertainty : ... ... Ellipticity : ... 1 - b/a = 0.26 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.30 Uncertainty : ... ... Cos-1(b/a) : ... 43 deg Position Angle [Equinox] : 72.8 deg [J2000] 73 deg [J2000] Uncertainty : ... ... Significance : No uncertainty reported Diameter Reference Level : 25.0 mag arcsec^-2^ Frequency : 6290 A 4.77E+14 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Maps (e.g., 2MASS, VLA, Sloan) Fitting Technique : Ellipse fitting to image Measured Quantity : Isophotal diameter Qualifiers : A radius is given in DIA_MAJ, not a diameter Coordinates Targeted : 187.2779119548 2.0523862748 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 4 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J122906.69+020308.5 Frequency Targeted : r (SDSS Petrosian) Major Axis (2a) : a = 1.09 arcsec 2a = 2.19 arcsec Uncertainty : 0.013 arcsec 0.03 arcsec Minor Axis (2b) : ... ... Uncertainty : ... ... Axis Ratio : ... ... Uncertainty : ... ... Ellipticity : ... ... Uncertainty : ... ... Eccentricity : ... ... Uncertainty : ... ... Cos-1(b/a) : ... ... Position Angle [Equinox] : ... ... Uncertainty : ... ... Significance : Based on count statistics only Diameter Reference Level : ... Frequency : 6290 A 4.77E+14 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Maps (e.g., 2MASS, VLA, Sloan) Fitting Technique : Profile fitting to image Measured Quantity : See comments Qualifiers : A radius is given in DIA_MAJ, not a diameter Coordinates Targeted : 187.2779119548 2.0523862748 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment :
No. 5 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J122906.69+020308.5 Frequency Targeted : r (SDSS deVaucouleurs) Major Axis (2a) : a = 0.6149 arcsec 2a = 1.23 arcsec Uncertainty : 0.009 arcsec 0.02 arcsec Minor Axis (2b) : ... 2b = 1.14 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.929 b/a = 0.93 Uncertainty : 0.016 0.02 Ellipticity : ... 1 - b/a = 0.07 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.07 Uncertainty : ... ... Cos-1(b/a) : ... 22 deg Position Angle [Equinox] : 77.6 deg [J2000] 78 deg [J2000] Uncertainty : ... ... Significance : Based on count statistics only Diameter Reference Level : ... Frequency : 6290 A 4.77E+14 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Maps (e.g., 2MASS, VLA, Sloan) Fitting Technique : Ellipse fitting to image Measured Quantity : Half-light ("effective") diameter Qualifiers : A radius is given in DIA_MAJ, not a diameter Coordinates Targeted : 187.2779119548 2.0523862748 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 6 Published Units: Homogenized Units: Reference Code : 2007SDSS6.C...0000: Published Object Name : SDSS J122906.69+020308.5 Frequency Targeted : r (SDSS Exponential) Major Axis (2a) : a = 0.5861 arcsec 2a = 1.17 arcsec Uncertainty : 0.006 arcsec 0.01 arcsec Minor Axis (2b) : ... 2b = 1.13 arcsec Uncertainty : ... 0.00 Axis Ratio : b/a = 0.961 b/a = 0.96 Uncertainty : 0.016 0.02 Ellipticity : ... 1 - b/a = 0.04 Uncertainty : ... ... Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.04 Uncertainty : ... ... Cos-1(b/a) : ... 16 deg Position Angle [Equinox] : 110.1 deg [J2000] 110 deg [J2000] Uncertainty : ... ... Significance : Based on count statistics only Diameter Reference Level : ... Frequency : 6290 A 4.77E+14 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Maps (e.g., 2MASS, VLA, Sloan) Fitting Technique : Ellipse fitting to image Measured Quantity : Half-light ("effective") diameter Qualifiers : A radius is given in DIA_MAJ, not a diameter Coordinates Targeted : 187.2779119548 2.0523862748 (J2000) Qualifiers : From new, raw data; DIA_MAJ or DIA_MIN modified from published data NED Comment : Effective (half-light) radius
No. 7 Published Units: Homogenized Units: Reference Code : 2020CSC...C2..0000: Published Object Name : Frequency Targeted : 0.5-7 keV Chandra Major Axis (2a) : 2.25337339 arcsec 2a = 2.25 arcsec Uncertainty : 0.00812000 arcsec 0.01 arcsec Minor Axis (2b) : 2b = 2.25337339 arcsec 2b = 2.25 arcsec Uncertainty : 0.00812000 0.01 Axis Ratio : ... b/a = 2.25 Uncertainty : ... 0.01 Ellipticity : ... 1 - b/a = -1.25 Uncertainty : ... 0.01 Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.67 Uncertainty : ... ... Cos-1(b/a) : ... 0 deg Position Angle [Equinox] : 0.0 deg [J2000] 0 deg [J2000] Uncertainty : ... ... Significance : 68% confidence Diameter Reference Level : extent deconvolved with PSF Frequency : 2.3 keV 5.56E+17 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Maps (e.g., 2MASS, VLA, Sloan) Fitting Technique : Deconvolved from beam (Gaussian deconvolution) Measured Quantity : Unspecified in paper Coordinates Targeted : Qualifiers : From new, raw data NED Comment :
No. 8 Published Units: Homogenized Units: Reference Code : 2020CSC...C2..0000: Published Object Name : Frequency Targeted : 0.2-0.5 keV Chandra Major Axis (2a) : 1.24374655 arcsec 2a = 1.24 arcsec Uncertainty : 0.00869295 arcsec 0.01 arcsec Minor Axis (2b) : 2b = 1.24374655 arcsec 2b = 1.24 arcsec Uncertainty : 0.00869295 0.01 Axis Ratio : ... b/a = 1.24 Uncertainty : ... 0.01 Ellipticity : ... 1 - b/a = -0.24 Uncertainty : ... 0.01 Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.21 Uncertainty : ... ... Cos-1(b/a) : ... 0 deg Position Angle [Equinox] : 0.0 deg [J2000] 0 deg [J2000] Uncertainty : ... ... Significance : 68% confidence Diameter Reference Level : extent deconvolved with PSF Frequency : 0.4 keV 9.67E+16 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Maps (e.g., 2MASS, VLA, Sloan) Fitting Technique : Deconvolved from beam (Gaussian deconvolution) Measured Quantity : Unspecified in paper Coordinates Targeted : Qualifiers : From new, raw data NED Comment :
No. 9 Published Units: Homogenized Units: Reference Code : 2020CSC...C2..0000: Published Object Name : Frequency Targeted : 0.5-1.2 keV Chandra Major Axis (2a) : 3.03599109 arcsec 2a = 3.04 arcsec Uncertainty : 0.01909111 arcsec 0.02 arcsec Minor Axis (2b) : 2b = 3.03599109 arcsec 2b = 3.04 arcsec Uncertainty : 0.01909111 0.02 Axis Ratio : ... b/a = 3.04 Uncertainty : ... 0.02 Ellipticity : ... 1 - b/a = -2.04 Uncertainty : ... 0.02 Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.80 Uncertainty : ... ... Cos-1(b/a) : ... 0 deg Position Angle [Equinox] : 0.0 deg [J2000] 0 deg [J2000] Uncertainty : ... ... Significance : 68% confidence Diameter Reference Level : extent deconvolved with PSF Frequency : 0.92 keV 2.22E+17 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Maps (e.g., 2MASS, VLA, Sloan) Fitting Technique : Deconvolved from beam (Gaussian deconvolution) Measured Quantity : Unspecified in paper Coordinates Targeted : Qualifiers : From new, raw data NED Comment :
No. 10 Published Units: Homogenized Units: Reference Code : 2020CSC...C2..0000: Published Object Name : Frequency Targeted : 1.2-2 keV Chandra Major Axis (2a) : 3.54923127 arcsec 2a = 3.55 arcsec Uncertainty : 0.01891769 arcsec 0.02 arcsec Minor Axis (2b) : 2b = 3.54923127 arcsec 2b = 3.55 arcsec Uncertainty : 0.01891769 0.02 Axis Ratio : ... b/a = 3.55 Uncertainty : ... 0.02 Ellipticity : ... 1 - b/a = -2.55 Uncertainty : ... 0.02 Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.85 Uncertainty : ... ... Cos-1(b/a) : ... 0 deg Position Angle [Equinox] : 0.0 deg [J2000] 0 deg [J2000] Uncertainty : ... ... Significance : 68% confidence Diameter Reference Level : extent deconvolved with PSF Frequency : 1.56 keV 3.77E+17 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Maps (e.g., 2MASS, VLA, Sloan) Fitting Technique : Deconvolved from beam (Gaussian deconvolution) Measured Quantity : Unspecified in paper Coordinates Targeted : Qualifiers : From new, raw data NED Comment :
No. 11 Published Units: Homogenized Units: Reference Code : 2020CSC...C2..0000: Published Object Name : Frequency Targeted : 2-7 keV Chandra Major Axis (2a) : 3.71961350 arcsec 2a = 3.72 arcsec Uncertainty : 0.03226764 arcsec 0.03 arcsec Minor Axis (2b) : 2b = 3.71961350 arcsec 2b = 3.72 arcsec Uncertainty : 0.03226764 0.03 Axis Ratio : ... b/a = 3.72 Uncertainty : ... 0.03 Ellipticity : ... 1 - b/a = -2.72 Uncertainty : ... 0.03 Eccentricity : ... [(a/b)2-1]/[(a/b)2+1] = 0.87 Uncertainty : ... ... Cos-1(b/a) : ... 0 deg Position Angle [Equinox] : 0.0 deg [J2000] 0 deg [J2000] Uncertainty : ... ... Significance : 68% confidence Diameter Reference Level : extent deconvolved with PSF Frequency : 3.8 keV 9.19E+17 Hz Frequency Mode : Broad-band detector (e.g. photographic plate) Measurement Mode Detector Type : Maps (e.g., 2MASS, VLA, Sloan) Fitting Technique : Deconvolved from beam (Gaussian deconvolution) Measured Quantity : Unspecified in paper Coordinates Targeted : Qualifiers : From new, raw data NED Comment :

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