Fig. 6.
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Detectability of short bursts with XMM-Newton (black and gray lines) and NuSTAR (blue and cyan lines), if the putative magnetar is coincident with the center of the galaxy or offset by a few arcminutes, respectively. The vertical dotted lines correspond to burst energy for which a trial-corrected confidence level is 99% for each case. See the main text for more details.
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