the cluster core (0.13’) and half-mass (0.58’) radii (large circles) are indicated. North is up, east to the left. ](f1.eps)

X-ray Analysis {#s:X-ray}
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Chandra in Outburst
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NGC 6440 was observed with the  ACIS-S detector for 49.1 ks, from July 28, 2009 15:16 (TT) to July 29, 2009 05:15, using a 1/2 subarray. We searched for periods of elevated background, but found none. We used the level 2 event files provided by the CXC, and CIAO 4.1 [^1] for our analysis. Images were produced in the 0.3-7 keV and 0.5-2.5 keV bands, both of which are dominated by the scattered halo (a combination of dust grain scattering and the intrinsic point-spread function of the  mirrors) and readout streak from a bright transient LMXB, heavily affected by pileup[^2]. Several faint point sources are clearly visible, which can be confidently identified with the cluster X-ray sources identified by @Pooley02b. In Fig. \[fig:image\], we show  images of NGC 6440 during the 2009 outburst, shortly after the 2009 outburst, during quiescent observations in 2000 and 2003 [@Pooley02b; @Cackett05], and during the 2001 outburst [@intZand01]. Clearly this is a new transient.

The CIAO detection algorithm [wavdetect]{} was run on a 0.3-7 keV image of 