Left panel: X-ray light curve of V07979 based on the observations from Chandra. For those observations for which the count rate is zero, upper limits are given and are indicated by the blue triangles. Unfortunately, there is no X-ray observation on 31 January 2013, which is indicated by the dashed black line, and shown zoomed in in the inset. Right panel: observed spectrum of V07979 extracted from the Chandra observations in the left panel, where S/N > 1.5 (black points). The red curve is the fitted model (an absorbed thermal plasma model) using XSPEC (see text for details).