Fig. 2.
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Source X20 is SN 2008bk. In the left and middle panels, we see the Chandra images from 2003 (OBSID: 3954) and 2011 (OBSID: 14231), respectively, in the broad band (0.5–7 keV); on the right we see the continuum-subtracted Hα +[N II] image from the Blanco 4 m telescope (MOSAIC II camera) obtained in 2011. In all figures, the radius of the circle is 3.5 arcsec.
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