Our analysis around the periodicity at P_∗ ~ 18.6 ms. The frequency range is 5.3 × 10^-2 Hz and the step in frequency is 0.1 μHz; the energy band is 0.36–2.2 keV and the size of the extraction region is 18.85″. We present the results of the same analysis for different data sets observed in SW mode: at top left, we show the periodogram for Calvera (obsid 0601180201; 8757 total counts); at top right, we show that for RRAT J1819-1458 (obsid 0406450201; 2968 total counts). Below are the periodograms for our data: at the left we provide results for events extracted from a background region (5322 total counts for an extraction region of size 52″) and on the right, for J1046 (total of 5260 counts).