1).

Three /PCA observations were able to detect the Oct./Nov. outburst. The first (on Oct. 28) identified pulsations again [@Altamirano09], at $L_X$(0.5-10 keV)$=8.6^{+0.9}_{-0.8}\times10^{35}$ ergs/s (see Table 1), after subtraction of Galactic Ridge emission. /PCA observations detected emission over background on Oct. 29 and (marginally) Oct. 30, and observations on Oct. 31 and after were consistent with Galactic Ridge emission.

![ \[fig:lcurve\] X-ray lightcurve of NGC 6440 over 6 months, with linear vertical scale. /PCA bulge scans are in black, with a box if they are $>4$ sigma above zero. /PCA pointed observations are magenta pentagons.  observations are blue triangles (open if upper limits). The outburst  observation is a red filled box. Red marks and dates at the top indicate the suggested 30.7 day recurrence epochs, which coincide with 5 clear episodes of X-ray activity. ](f3.eps)

The full /PCA galactic bulge scan data reveals seven times from 2000 to 2009 when NGC 6440’s count rates are 4 sigma above zero. The two brightest outbursts ($L_X>10^{37}$ ) have been identified with the other transient in NGC 6440, SAX J1748.9-2021=CX1 [@Altamirano07; @intZand01]. The other five potential outbursts are much fainter and briefer (only a single bulge scan point each, so lasting less than 