sources (see Fig. \[fig:image\]). ](f4.eps "fig:")\

$
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![ \[fig:inset\] X-ray lightcurve measurements of NGC 6440 X-2 over its five known outbursts, with a logarithmic vertical scale. /PCA bulge scans are black errorbars, with a box point if they are $>4$ sigma above zero (some points appear more significant than they are due to the log scale). /PCA pointed observation detections (background-subtracted, see text) are magenta pentagons.  observations are blue triangles, or blue upper limits when they are not clear detections of NGC 6440 X-2.  observations are the red filled box and series of red crosses (showing the lightcurve from the June observation). ](f5c.eps)

Chandra in Quiescence
---------------------

We combined two  ACIS-S observations of NGC 6440 (total exposure 48 ks) when no transients were in outburst [ObsIDs 947 and 3799; @Pooley02b; @Cackett05] to look for evidence of NGC 6440 X-2’s X-ray emission in quiescence. The observations were reprocessed and aligned, and filtered to produce a 0.3-7 keV band image (Fig. \[fig:image\]). No photons lie within a 1” circle around NGC 6440 X-2. Using 2.3 photons as our 90% confidence upper limit [@Gehrels86], we compute limits on the unabsorbed quiescent luminosity. For a power-law of index 2.2, 