Dual black hole associated with obscured and unobscured AGN: CXO
  J101527.2+625911
  We report the results of an investigation to determine the nature of the
offset active galactic nucleus (AGN) found in the source CXO J101527.2+625911.
Hubble Space Telescope and Chandra X-ray observatory data had suggested that
the offset AGN, which has an angular separation of only 0\farcs26 from the
center of the host galaxy, is a recoiled Super Massive Black Hole (rSMBH). We
carried out high angular resolution observations with both the VLBA (1.54 GHz)
and the VLA (10.0 GHz \& 33.0 GHz) and detected a single compact radio source
in the center of the host galaxy, with no radio continuum emission associated
with the offset AGN. The detected radio source has a high brightness
temperature value of $T_b=7.2\times10^{7}$ K, indicating that the radio
emission is associated with an AGN. Furthermore, we present the decomposition
of high-resolution KECK spectra of the [O III]5007\AA line into two narrow
emission line components, which is a characteristic sign of a dual black hole
system. These new radio and optical wavelength results suggest that CXO
J101527.2+625911 is the host of a dual black hole system rather than a rSMBH.
