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We performed an analysis of all RXTE observations of the Low Mass X-rayBinary and Black Hole Candidate IGR J17091-3624 during the 2011-2013 outburstof the source. By creating lightcurves, hardness-intensity diagrams and powerdensity spectra of each observation, we have created a set of 9 variability`classes' that phenomenologically describe the range of types of variabilityseen in this object. We compare our set of variability classes to thoseestablished by Belloni et al. (2000) to describe the similar behaviour of theLMXB GRS 1915+105, finding that some types of variability seen in IGRJ17091-3624 are not represented in data of GRS 1915+105. We also use allavailable X-ray data of the 2011-2013 outburst of IGR J17091-3624 to analyseits long-term evolution, presenting the first detection of IGR J17091-3624above 150 keV as well as noting the presence of `re-flares' during the latterstages of the outburst. Using our results we place new constraints on the massand distance of the object, and find that it accretes at <33% of its Eddingtonlimit. As such, we conclude that Eddington-limited accretion can no longer beconsidered a sufficient or necessary criterion for GRS 1915+105-likevariability to occur in Low Mass X-Ray Binaries.

An Atlas of Exotic Variability in IGR J17091-3624: A Comparison with GRS 1915+105