Comparison between synthetic and apodized (in-slit) photometry. The synthetic photometry is obtained from the NIRSpec spectrum of M4327 as delivered by the data reduction pipeline (with point-source-like path-losses correction) by integrating over the NIRCam F115W, F150W, F200W, and F277W bandpasses. The apodized photometry is instead measured from the area of the NIRCam images in the same filters that overlaps with the central shutter of the NIRSpec slitlet (i.e., the region from where the 1D spectrum is extracted).