convert /PCA bulge scan fluxes to 0.5-10 keV unabsorbed fluxes with PIMMS[^5], and assume a distance of 8.5 kpc to estimate luminosities.

Swift
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Eighteen /XRT observations were performed, tracking five outbursts from NGC 6440 X-2 (see Table 1). We extracted all  XRT spectra from 20-pixel radii (except for Oct. 1 and 28, see below), and background from a surrounding annulus. We downloaded the response matrix swxpc0to12\_20010101v009.rmf from the  website[^6], and created effective area files using the XRTMKARF tool. Spectra with more than 50 counts were binned with 15 counts/bin for $\chi^2$ statistics, those with fewer used C-statistics (either binned with 5 counts/bin or unbinned), while we produced only luminosity limits for less than 10 detected counts.

A  X-ray Telescope (XRT) observation on June 4, 2009 found enhanced X-ray emission from NGC 6440. Using the FTOOL XRTCENTROID on the June 4 XRT source, we identified a position of RA=17:48:52.73, Dec=-20:21:24.1 with an error radius of 5. This position is consistent with NGC 6440 X-2 (see Fig. \[fig:image\], \[fig:Swift6\]), but not with other known X-ray sources in NGC 6440, so we conclude it is the same source. A second  observation on June 11 found much weaker emission, at position RA=17 48 