Tale of J1328+2752: a misaligned double-double radio galaxy hosted by a
  binary black-hole?
  We present a radio and optical study of the double-double radio galaxy
J1328+2752 based on new low-frequency GMRT observations and SDSS data. The
radio data were used to investigate the morphology and to perform a spectral
index analysis. In this source we find that the inner double is misaligned by
$\sim$30$^\circ$ from the axis of the outer diffuse structure. The SDSS
spectrum shows that the central component has double-peaked line profiles with
different emission strengths. The average velocity off-set of the two
components is 235$\pm$10.5 km s$^{-1}$. The misaligned radio morphology along
with the double-peaked emission lines indicate that this source is a potential
candidate binary supermassive black hole. This study further supports mergers
as a possible explanation for repeated jet activity in radio sources.
