detection limit ($\sim$1.5 mCrab). @Altamirano09 report the detection of pulsations at a 3.4 sigma level, further confirming the identification of this transient with NGC 6440 X-2.  observations on Oct. 3rd found it below the PCA’s sensitivity limit. A fifth outburst was caught by /PCA on Oct. 28, returning to quiescence by Nov. 1st. Below we describe spectral analysis of these data; all /PCA timing analysis is described in @Altamirano09.

We extracted spectra from the PCA [@Jahoda06] detectors (PCU2 was consistently on, sometimes joined by other PCUs), excluding times when elevation angle ELV$<10$, source offset $>0.02$, or the time since the last South Atlantic Anomaly passage was $<$ 30 minutes. The background was modeled using the latest faint background model pca\_bkgd\_cmfaintl7\_eMv20051128.mdl, and the recorded times of South Atlantic Anomaly passage [^4]. Response files were created with the PCARMF (v. 11.1) tool. For spectral fitting we exclude data below 3 keV and above where the source can no longer be detected above our modeled background; this cut ranged between 10 and 30 keV, depending on the observation. HEXTE (cluster B, sensitive to the 20-200 keV energy range) did not detect the source even in the brightest (Aug. 30) pointed  observation. $N_H$ was 