Quasar 3C 47: Extreme Population B jetted source with double-peaked profiles Shimeles Terefe Mengistue, Paola Marziani, Ascensión del Olmo, Mirjana Pović, Jaime Perea and Alice Deconto Machado A&A, 685 (2024) A116 Published online: 15 May 2024 DOI: 10.1051/0004-6361/202348800