Name:	Fajardo-Acosta, Sergio
Email:	fajardo@ipac.caltech.edu
Institution:	Caltech / IPAC
Title:	Spectroscopic Follow-Up of a Very Unusual AllWISE High Proper Motion Object
Topic:	Extreme Sources
Abstract:	We discuss spectroscopy observations as part of on-going follow-up studies of high motion objects measured in the AllWISE survey. Our observations reveal a few very unusual systems whose spectra are not fitted by any known brown dwarf models. One such system has characteristics of a late-M or early-L dwarf, but with discrepant color temperature and with spectral features indicative of a very different type of object. Various possibilities may explain our observations, including an unusual multiple system, variability, or atmospheric phenomena not previously known.