Image Details
Caption: Figure 6.
Object detection, classification, and counts in the El Gordo noncluster module in the F090W, F115W, F150W, and F200W filters. (a) (Left): SourceExtractor AB-magnitude error bars vs. MAG_AUTO AB-mag resulting from the adopted SourceExtractor-parameters (Section 3.1). Horizontal dashed lines show the adopted 5σ point-source detection limits (Table 1). (b) (Middle): star–galaxy classification diagram based on SourceExtractor MAG_AUTO AB-magnitudes vs. image FWHM. Left solid vertical lines indicate the NIRCam diffraction limit for each image with its current sampling. Blue points represent galaxies. The box to the right of the vertical line identifies objects classified as stars (red points). Objects with FWHM < FWHM(PSF) have been flagged and removed from this plot as spurious detections or border imperfections. The green dashed lines indicate for each image the effective point-source (horizontal) and SB (slanted) detection limits. (c) (Right): resulting star counts (red) and galaxy counts (blue). The vertical dashed line is the limit to which stellar objects are defined.
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