ZTF long-term light curves in g and r filters (left) and DBSP optical spectrum of 2CXO J044147.9–015145 (right). The gray lines represent the Keck Telluric Line List. The optical spectrum shows WD Balmer absorption lines with no sign of the donor signature, weakly double-peaked hydrogen and helium emission lines, and no detectable He II 4686 Å emission line, giving a 3σ upper limit for the line ratio He II/Hβ < 0.05 (see Table 3). Optical and X-ray properties suggest that the object is a CV (WZ Sge type; see Sect. 5.1.2 for more details).