Floc'h, E. LeWillmer, C. N. A.Noeske, K.Konidaris, N. P.Laird, E. S.Koo, D. C.Nandra, K.Bundy, K.Salim, S.Maiolino, R.Conselice, C. J.Lotz, J. M.Papovich, C.Smith, J. D.Bai, L.Coil, A. L.Barmby, P.Ashby, M. L. N.Huang, J. -SBlaylock, M.Rieke, G.Newman, J. A.Ivison, R.Chapman, S.Dole, H.Egami, E.Elbaz, D.2014-03-122014-03-122007-05-01Floc'h, E. Le, C. N. A. Willmer, K. Noeske, N. P. Konidaris, et al. 2007. "Far-infrared characterization of an ultra-luminous starburst associated with a massively-accreting black hole at z=1.15." The Astrophysical Journal 660(1): 65-L680004-637Xhttp://dx.doi.org/10.1086/517916http://hdl.handle.net/10222/45303As part of the "All Wavelength Extended Groth Strip International Survey" (AEGIS), we describe the panchromatic characterization of an X-ray luminous active galactic nucleus (AGN) in a merging galaxy at z=1.15. This object is detected at infrared (8mic, 24mic, 70mic, 160mic), submillimeter (850mic) and radio wavelengths, from which we derive a bolometric luminosity L_bol ~ 9x10^12 Lsol. We find that the AGN clearly dominates the hot dust emission below 40mic but its total energetic power inferred from the hard X-rays is substantially less than the bolometric output of the system. About 50% of the infrared luminosity is indeed produced by a cold dust component that probably originates from enshrouded star formation in the host galaxy. In the context of a coeval growth of stellar bulges and massive black holes, this source might represent a ``transition'' object sharing properties with both quasars and luminous starbursts. Study of such composite galaxies will help address how the star formation and disk-accretion phenomena may have regulated each other at high redshift and how this coordination may have participated to the build-up of the relationship observed locally between the masses of black holes and stellar spheroids.article660165