Discovery of a Long-Lived, High Amplitude Dusty Infrared Transient
  We report the detection of an infrared selected transient which has lasted at least 5 years, first identified by a large mid-infrared and optical outburst from a faint X-ray source detected with the Chandra X-ray Observatory. In this paper we rule out several scenarios for the cause of this outburst, including a classical nova, a luminous red nova, AGN flaring, a stellar merger, and intermediate luminosity optical transients, and interpret this transient as the result of a Young Stellar Object (YSO) of at least solar mass accreting material from the remains of the dusty envelope from which it formed, in isolation from either a dense complex of cold gas or massive star formation. This object does not fit neatly into other existing categories of large outbursts of YSOs (FU Orionis types) which may be a result of the object's mass, age, and environment. It is also possible that this object is a new type of transient unrelated to YSOs. 
C.T. Britt, T.J. Maccarone, J.D. Green, P.G. Jonker, R.I. Hynes,   M.A.P. Torres, J. Strader, L. Chomiuk, R. Salinas, P. Luc...
astro-ph.SR astro-ph.HE