Far-infrared photometry of OJ 287 with the Herschel Space Observatory Mark Kidger, Staszek Zola, Mauri Valtonen, Anne Lähteenmäki, Emilia Järvelä, Merja Tornikoski, Joni Tammi, Alexis Liakos and Gary Poyner A&A, 610 (2018) A74 Published online: 05 March 2018 DOI: 10.1051/0004-6361/201732142