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Euclid on Sky
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Table E.1

Input parameters for the SourceExtractor run producing the ERO science validation catalogues.

Column Parameter Description Unit
1 NUMBER Running object number
2 X_IMAGE Object position along x [pixel]
3 Y_IMAGE Object position along y [pixel]
4 ID_PARENT Parent ID (before deblending)
5 EXT_NUMBER FITS extension number
6 FLUX_ISO Isophotal flux [ADU]
7 FLUXERR_ISO RMS error for isophotal flux [ADU]
8 MAG_ISO Isophotal magnitude [mag]
9 MAGERR_ISO RMS error for isophotal magnitude [mag]
10 FLUX_ISOCOR Corrected isophotal flux [ADU]
11 FLUXERR_ISOCOR RMS error for corrected isophotal flux [ADU]
12 MAG_ISOCOR Corrected isophotal magnitude [mag]
13 MAGERR_ISOCOR RMS error for corrected isophotal magnitude [mag]
14 FLUX_APER Flux vector within fixed circular aperture(s) [ADU]
24 FLUXERR_APER RMS error vector for aperture flux(es) [ADU]
34 MAG_APER Fixed aperture magnitude vector [mag]
44 MAGERR_APER RMS error vector for fixed aperture mag. [mag]
54 FLUX_AUTO Flux within a Kron-like elliptical aperture [ADU]
55 FLUXERR_AUTO RMS error for AUTO flux [ADU]
56 MAG_AUTO Kron-like elliptical aperture magnitude [mag]
57 MAGERR_AUTO RMS error for AUTO magnitude [mag]
58 KRON_RADIUS Kron apertures in units of A or B
59 FLUX_PETRO Flux within a Petrosian-like elliptical aperture [ADU]
60 FLUXERR_PETRO RMS error for Petrosian flux [ADU]
61 MAG_PETRO Petrosian-like elliptical aperture magnitude [mag]
62 MAGERR_PETRO RMS error for Petrosian magnitude [mag]
63 PETRO_RADIUS Petrosian apertures in units of A or B
64 FLUX_GROWTH Cumulated growth-curve [ADU]
65 FLUX_GROWTHSTEP Step for growth-curves [pixel]
66 MAG_GROWTH Cumulated magnitude growth-curve [mag]
67 MAG_GROWTHSTEP Step for growth-curves [pixel]
68 FLUX_RADIUS Fraction-of-light radii [pixel]
69 BACKGROUND Background at centroid position [ADU]
70 MU_MAX Peak surface brightness above background [mag arcsec−2]
71 X_FOCAL Barycenter position along focal-plane x axis
72 Y_FOCAL Barycenter position along focal-plane y axis
73 X_WORLD Barycenter position along world x axis [deg]
74 Y_WORLD Barycenter position along world y axis [deg]
75 ALPHA_SKY Right ascension of barycenter (native) [deg]
76 DELTA_SKY Declination of barycenter (native) [deg]
77 ALPHA_J2000 Right ascension of barycenter (J2000) [deg]
78 DELTA_J2000 Declination of barycenter (J2000) [deg]
79 ALPHA_B1950 Right ascension of barycenter (B1950) [deg]
80 DELTA_B1950 Declination of barycenter (B1950) [deg]
81 ERRX2_IMAGE Variance of position along x [pixel2]
82 ERRY2_IMAGE Variance of position along y [pixel2]
83 ERRXY_IMAGE Covariance of position between x and y [pixel2]
84 ERRA_IMAGE RMS position error along major axis [pixel]
85 ERRB_IMAGE RMS position error along minor axis [pixel]
86 ERRTHETA_IMAGE Error ellipse position angle (CCW/x) [deg]
87 ERRCXX_IMAGE Cxx error ellipse parameter [pixel−2]
88 ERRCYY_IMAGE Cyy error ellipse parameter [pixel−2]
89 ERRCXY_IMAGE Cxy error ellipse parameter [pixel−2]
90 XPEAK_IMAGE x-coordinate of the brightest pixel [pixel]
91 YPEAK_IMAGE y-coordinate of the brightest pixel [pixel]
92 XPEAK_FOCAL Focal-plane x coordinate of the brightest pixel
93 YPEAK_FOCAL Focal-plane y coordinate of the brightest pixel
94 XPEAK_WORLD World-x coordinate of the brightest pixel [deg]
95 YPEAK_WORLD World-y coordinate of the brightest pixel [deg]
96 ALPHAPEAK_SKY Right ascension of brightest pix (native) [deg]
97 DELTAPEAK_SKY Declination of brightest pix (native) [deg]
98 ALPHAPEAK_J2000 Right ascension of brightest pix (J2000) [deg]
99 DELTAPEAK_J2000 Declination of brightest pix (J2000) [deg]
100 ALPHAPEAK_B1950 Right ascension of brightest pix (B1950) [deg]
101 DELTAPEAK_B1950 Declination of brightest pix (B1950) [deg]
102 XMIN_IMAGE Minimum x-coordinate among detected pixels [pixel]
103 YMIN_IMAGE Minimum y-coordinate among detected pixels [pixel]
104 XMAX_IMAGE Maximum x-coordinate among detected pixels [pixel]
105 YMAX_IMAGE Maximum y-coordinate among detected pixels [pixel]
106 XWIN_IMAGE Windowed position estimate along x [pixel]
107 YWIN_IMAGE Windowed position estimate along y [pixel]
108 ERRX2WIN_IMAGE Variance of windowed position along x [pixel2]
109 ERRY2WIN_IMAGE Variance of windowed position along y [pixel2]
110 ERRXYWIN_IMAGE Covariance of windowed position between x and y [pixel2]
111 ERRAWIN_IMAGE RMS windowed position error along major axis [pixel]
112 ERRBWIN_IMAGE RMS windowed position error along minor axis [pixel]
113 ERRTHETAWIN_IMAGE Windowed error ellipse position angle (CCW/x) [deg]
114 ERRCXXWIN_IMAGE Cxx windowed error ellipse parameter [pixel−2]
115 ERRCYYWIN_IMAGE Cyy windowed error ellipse parameter [pixel−2]
116 ERRCXYWIN_IMAGE Cxy windowed error ellipse parameter [pixel−2]
117 X2_IMAGE Variance along x [pixel2]
118 Y2_IMAGE Variance along y [pixel2]
119 XY_IMAGE Covariance between x and y [pixel2]
120 A_IMAGE Profile RMS along major axis [pixel]
121 B_IMAGE Profile RMS along minor axis [pixel]
122 THETA_IMAGE Position angle (CCW/x) [deg]
123 ELONGATION A_IMAGE/B_IMAGE
124 ELLIPTICITY 1 - B_IMAGE/A_IMAGE
125 CXX_IMAGE Cxx object ellipse parameter [pixel−2]
126 CYY_IMAGE Cyy object ellipse parameter [pixel−2]
127 CXY_IMAGE Cxy object ellipse parameter [pixel−2]
128 ISOAREAF_IMAGE Isophotal area (filtered) above Detection threshold [pixel2]
129 ISOAREA_IMAGE Isophotal area above analysis threshold [pixel2]
130 X2WIN_IMAGE Windowed variance along x [pixel2]
131 Y2WIN_IMAGE Windowed variance along y [pixel2]
132 XYWIN_IMAGE Windowed covariance between x and y [pixel2]
133 CXXWIN_IMAGE Windowed Cxx object ellipse parameter [pixel−2]
134 CYYWIN_IMAGE Windowed Cyy object ellipse parameter [pixel−2]
135 CXYWIN_IMAGE Windowed Cxy object ellipse parameter [pixel−2]
136 AWIN_IMAGE Windowed profile RMS along major axis [pixel]
137 BWIN_IMAGE Windowed profile RMS along minor axis [pixel]
138 THETAWIN_IMAGE Windowed position angle (CCW/x) [deg]
139 CLASS_STAR S/G classifier output
140 FWHM_IMAGE FWHM assuming a gaussian core [pixel]
141 XPSF_IMAGE X coordinate from PSF-fitting [pixel]
142 YPSF_IMAGE Y coordinate from PSF-fitting [pixel]
143 ALPHAPSF_J2000 Right ascension of the fitted PSF (J2000) [deg]
144 DELTAPSF_J2000 Declination of the fitted PSF (J2000) [deg]
145 FLUX_PSF Flux from PSF-fitting [ADU]
146 FLUXERR_PSF RMS flux error for PSF-fitting [ADU]
147 MAG_PSF Magnitude from PSF-fitting [mag]
148 MAGERR_PSF RMS magnitude error from PSF-fitting [mag]
149 FLUX_POINTSOURCE Point source flux from fitting [ADU]
150 FLUXERR_POINTSOURCE RMS error on fitted point source total flux [ADU]
151 MAG_POINTSOURCE Point source total magnitude from fitting [mag]
152 MAGERR_POINTSOURCE RMS error on fitted point source total magnitude [mag]
153 FLUX_DISK Disk total flux from fitting [ADU]
154 FLUXERR_DISK RMS error on fitted disk total flux [ADU]
155 MAG_DISK Disk total magnitude from fitting [mag]
156 MAGERR_DISK RMS error on fitted disk total magnitude [mag]
157 MU_MAX_DISK Peak disk surface brightness above background [mag arcsec−2]
158 MU_EFF_DISK Effective disk surface brightness above background [mag arcsec−2]
159 MU_MEAN_DISK Mean effective disk surface brightness above background [mag arcsec−2]
160 FLUX_SPHEROID Spheroid total flux from fitting [ADU]
161 FLUXERR_SPHEROID RMS error on fitted spheroid total flux [ADU]
162 MAG_SPHEROID Spheroid total magnitude from fitting [mag]
163 MAGERR_SPHEROID RMS error on fitted spheroid total magnitude [mag]
164 MU_MAX_SPHEROID Peak spheroid surface brightness above background [mag arcsec−2]
165 MU_EFF_SPHEROID Effective spheroid surface brightness above background [mag arcsec−2]
166 MU_MEAN_SPHEROID Mean effective spheroid surface brightness above background [mag arcsec−2]
167 DISK_INCLINATION Disk inclination from fitting [deg]
168 DISK_INCLINATIONERR RMS error on disk inclination from fitting [deg]
169 DISK_THETA_IMAGE Disk position angle (CCW/x) from fitting [deg]
170 DISK_THETAERR_IMAGE RMS error on fitted disk position angle [deg]
171 SPHEROID_SERSICN Spheroid Sersic index from fitting
172 SPHEROID_SERSICNERR RMS error on fitted spheroid Sersic index
173 SPHEROID_THETA_IMAGE Spheroid position angle (CCW/x) from fitting [deg]
174 SPHEROID_THETAERR_IMAG RMS error on spheroid position angle [deg]
175 SPHEROID_REFF_IMAGE Spheroid effective radius from fitting [pixel]
176 SPHEROID_REFFERR_IMAGE RMS error on fitted spheroid effective radius [pixel]
177 FLUX_MODEL Flux from model-fitting [ADU]
178 FLUXERR_MODEL RMS error on model-fitting flux [ADU]
179 MAG_MODEL Magnitude from model-fitting [mag]
180 MAGERR_MODEL RMS error on model-fitting magnitude [mag]
181 MU_MAX_MODEL Peak model surface brightness above background [mag arcsec−2]
182 FLUX_MAX_MODEL Peak model flux above background [ADU]
183 FLUX_EFF_MODEL Effective model flux above background [ADU]
184 FLUX_MEAN_MODEL Mean effective model flux above background [ADU]
185 MU_EFF_MODEL Effective model surface brightness above background [mag arcsec−2]
186 MU_MEAN_MODEL Mean effective model surface brightness above background [mag arcsec−2]
187 XMODEL_IMAGE X coordinate from model-fitting [pixel]
188 YMODEL_IMAGE Y coordinate from model-fitting [pixel]
189 CXXMODEL_IMAGE Cxx ellipse parameter from model-fitting [pixel−2]
190 CYYMODEL_IMAGE Cyy ellipse parameter from model-fittinh [pixel−2]
191 CXYMODEL_IMAGE Cxy ellipse parameter from model-fitting [pixel−2]
192 SPREAD_MODEL Spread parameter from model-fitting
193 SPREADERR_MODEL Spread parameter error from model-fitting
194 NOISEAREA_MODEL Equivalent noise area of the fitted model [pixel2]
195 NITER_MODEL Number of iterations for model-fitting
196 VECTOR_MODEL Model-fitting coefficients
208 VECTOR_MODELERR Model-fitting coefficient uncertainties
220 MATRIX_MODELERR Model-fitting covariance matrix
364 CHI2_MODEL Reduced Chi2 of the fit

Notes. Some parameters generate multiple columns in the output catalogue, as exemplified by MAG_APER, which covers 10 different apertures as described in Sect. 8. This is indicated by the jump in column numbers in this table. In total, the ERO catalogues feature 364 columns. The parameter descriptions are from SourceExtractor.

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