Detection of a possible superluminous supernova in the epoch of
  reionization
  An interesting transient has been detected in one of our three Dark Energy
Camera deep fields. Observations of these deep fields take advantage of the
high red sensitivity of DECam on the Cerro Tololo Interamerican Observatory
Blanco telescope. The survey includes the Y band with rest wavelength 1430{\AA}
at z = 6. Survey fields (the Prime field 0555-6130, the 16hr field 1600-75 and
the SUDSS New Southern Field) are deeper in Y than other infrared surveys. They
are circumpolar, allowing all night to be used efficiently, exploiting the moon
tolerance of 1 micron observations to minimize conflict with the Dark Energy
Survey. As an i-band dropout (meaning that the flux decrement shortward of
Lyman alpha is in the i bandpass), the transient we report here is a supernova
candidate with z ~ 6, with a luminosity comparable to the brightest known
current epoch superluminous supernova (i.e., ~ 2 x 10^11 solar luminosities).
