Follow-up J-band photometry of the secondary eclipse. We show the time-series photometry acquired at the Kitt Peak 2.1 m telescope with FLAMINGOS, which is superimposed is the best fit model (Sect. 3.5; red line) from which we derive a temperature of 3922±42 K for the M dwarf. Below, we show the residuals to the fit and the individual photometric uncertainties. On the top panel, we also show a model light curve (green, dashed line) considering a cooler temperature for the M dwarf (3350 K), as expected from theoretical models (see discussion in Sect. 4). This cooler temperature model light curve is significantly shallower than our best fit model (shown in red) and does not fit the depth of the secondary eclipse.