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Fig. 2.

image

Full-band (0.5−10 keV) merged XRT image corresponding to the Fermi UGS 3FGL J0121.8−3917. The yellow dashed line indicates the 3FGL positional uncertainty ellipse at 95% level of confidence, while the white circles show the XRT sources detected with S/N greater than 3. There is only one XRT counterpart within the positional uncertainty ellipse of 3FGL J0121.8−3917. The image was smoothed with a Gaussian kernel radius of 5 pixels.

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