A near/mid infrared search for ultra-bright submillimetre galaxies:
  Searching for Cosmic Eyelash Analogues
  We present results from a near/mid IR search for submillimetre galaxies over
a region of 6230 sq deg. of the southern sky. We used a cross-correlation of
the VISTA Hemispheric Survey (VHS) and the WISE database to identify bright
galaxies (K_s <= 18.2) with near/mid IR colours similar to those of the high
redshift lensed sub-mm galaxy SMM J2135-0102. We find 7 galaxies which fulfill
all five adopted near/mid IR colour (NMIRQC) criteria and resemble the SED of
the reference galaxy at these wavelengths. For these galaxies, which are
broadly distributed in the sky, we determined photometric redshifts in the
range z=1.6-3.2. We searched the VHS for clusters of galaxies, which may be
acting as gravitational lenses, and found that 6 out of the 7 galaxies are
located within 3.5 arcmin of a cluster/group of galaxies. Using the J-K_s vs J
sequences we determine photometric redshifts for these clusters/groups in the
range z=0.2-0.9. We propose the newly identified sources are ultra-bright high
redshift lensed SMG candidates. Follow-up observations in the sub-mm and mm are
key to determine the ultimate nature of these objects.
