Strongly pulsed thermal X-rays from a single extended hot spot on PSR J2021+4026 Michela Rigoselli, Sandro Mereghetti, Roberto Taverna, Roberto Turolla and Davide De Grandis A&A, 646 (2021) A117 Published online: 17 February 2021 DOI: 10.1051/0004-6361/202039774