Fig. 3.
Optical spectrum of XMMSL2 J1446+68 taken on September 4, 2016 with the FAST instrument on the FLWO telescope (light green) fitted with a stellar population model shown in dark green and pink (see text for details of the fitting procedure). The mean Swift-UVOT filter fluxes from the period September 12, 2016 to August 14, 2017 are overplotted as red squares (U,B,V) and blue circles (UVW1,UVM2,UVW2). The GALEX-NUV filter point from 2007 is shown as a purple triangle.
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