SIMBAD references

WISEA J153429.75-104303.3 (a.k.a. “The Accident”) is a brown dwarf with unique observational properties unlike those of any other known (sub)stellar object. It is thought to be a very cold, metal-poor brown dwarf, and potentially the first identified Y-type subdwarf. Although WISEA J153429.75-104303.3 is extremely faint at λ ∼ 1.25 μm, low-temperature atmosphere models suggest that Y-band flux could increase dramatically relative to J-band as metallicity decreases from solar. We therefore obtained deep Y-band follow-up imaging of WISEA J153429.75-104303.3 with the Dark Energy Camera, and report a resulting Y-band limit of Y > 21.79 mag (Vega, 5σ).