TXS 2116-077: A Gamma-Ray Emitting Relativistic Jet Hosted in a Galaxy Merger

M.A. acknowledge the prompt Chandra DDT observation of TXS 2116-077 and funding under contract DD8-19104X. V.S.P. is grateful to C. Y. Peng for his assistance with the GALFIT modeling. M.A. acknowledges discussions with R..Blandford and C..Conselice and the support of NSF through grant AST-1715256 F.P. acknowledges support from the Spanish MICINN grant PGC2018-101931-B-100. E.P. and R.G.B. acknowledge financial support from the Spanish Ministry of Economy and Competitiveness through grant AYA2016-77846-P. E.P., R.G.B., and F.P. acknowledge support from the State Agency for Research of the Spanish MCIU through the "Center of Excellence Severo Ochoa" award to the Instituto de Astrofisica de Andalucia (SEV-2017-0709). A.D. acknowledges the support of the Ramon y Cajal program from the Spanish MINECO. This work is based on data collected at the Subaru Telescope, which is operated by the National Astronomical Observatory of Japan. Based on service observations made with the 4.2 m WHT operated by the Isaac Newton Group of Telescopes and installed in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias, in the island of La Palma. We are grateful to staff astronomers Antonio Cabrera at GTC and Ian Skillen at WHT for carrying out MEGARA, OSIRIS, and ISIS observations. This work is based on observations made with the GTC, in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias, under Director's Discretionary Time.