IR excess derived by SPIPS for each star of the sample (see also Table 2): X Sgr, 7.01 d (a), U Aql, 7.02 d (b), η Aql, 7.17 d (c), β Dor, 9.84 d (d), ζ Gem, 10.15 d (e), TT Aql, 13.75 d (f), T Mon, 27.03 d (g), and U Car, 38.87 d (h). The excess is presented as the magnitude difference between the atmospheric model and the median photometric data, where positive and negative values indicate emission and absorption, respectively. The fitted IR excess (dashed green line) is modeled with a logistic function presented at the bottom of each figure. The orange bar in panel (h) for U Car corresponds to the I2 Spitzer band, ignored in the fit due to CO band-head absorption at 4.6 micron (Marengo et al. 2010a; Scowcroft et al. 2016; Gallenne et al. 2021).