Fig. 2

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Swift-XRT observation for the BAT source J1937.4-4013 in the energy band 0.3-5 keV (left panel) and 5.1-10 keV (right panel). There are two soft X-ray sources within the BAT R95, WISEA J193714.86-401014.4 and LEDA 588288 with flux 1.2 × 10−12 erg s−1 cm−2 and 6.5 × 10−12 erg s−1 cm−2 respectively in the energy band 0.3-10 keV. The spectral fitting and power-law extrapolation predicts a flux of 1.1 × 10−12 erg s−1 cm−2 and 6.1 × 10−10 erg s−1 cm−2 for WISEA J193714.86-401014.4 and LEDA 588288, respectively, in the energy band 15-150 keV, so we associated LEDA 588288 with the BAT source.
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