Panel a: extracted spectrum of PDS 70 c both with IFS (green squares) and IRDIS (violet squares). The green solid line represents the best fit Exo-REM model while the green dashed line is the best fit BT-Settl model. The parameters of the best-fit models are listed in the text (Sect. 4.1). The cyan solid line represents an extracted spectrum for a speckle from the same dataset. We also overplot the rescaled spectrum of PDS 70 b both for IFS (deep brown squares) and IRDIS (light brown squares). Panel b: same as panel a but for the PLF spectrum. We plot as a blue solid line the stellar spectrum normalized to the companion flux to demonstrate their similarity. Panel c: comparison between the extracted spectra for PDS 70 c and the PLF and the spectrum obtained making a median of ten different positions of the disk. Panel d: comparison between the injected spectrum of a simulated planet in a position similar to PDS 70 c with respect to the disk (deep blue solid line) and the relative extracted spectrum (orange squares). The same thing is done for a simulated planet at a similar position of the PLF (black solid line and red circles).