The European Pulsar Timing Array (EPTA) is a collaboration between European and partner institutes, namely ASTRON (NL), INAF/Osservatoriodi Cagliari (IT), Max-Planck-Institut für Radioastronomie (GER), Nanćay/Paris Observatory (FRA), the University of Manchester (UK), the University of Birmingham (UK), the University of East Anglia (UK), the University of Bielefeld (GER), the University of Paris (FRA), the University of Milan-Bicocca (IT), the Foundation for Research and Technology, Hellas (GR), and Peking University (CHN), with the aim to provide high-precision pulsar timing to work towards the direct detection of low-frequency gravitational waves.
Pulsar research at the Jodrell Bank Centre for Astrophysics and the observations using the Lovell Telescope are supported by a Consolidated Grant (ST/T000414/1) from the UK's Science and Technology Facilities Council (STFC).
The Nancay radio Observatory is operated by the Paris Observatory, associated with the French Centre National de la Recherche Scientifique (CNRS), and partially supported by the Region Centre in France.
We acknowledge financial support from ``Programme National de Cosmologie and Galaxies'' (PNCG), and ``Programme National Hautes Energies'' (PNHE) funded by CNRS/INSU-IN2P3-INP, CEA and CNES, France.
We acknowledge financial support from Agence Nationale de la Recherche (ANR-18-CE31-0015), France.
The Westerbork Synthesis Radio Telescope is operated by the Netherlands Institute for Radio Astronomy (ASTRON) with support from the Netherlands Foundation for Scientific Research (NWO).
The Sardinia Radio Telescope (SRT) is funded by the Department of University and Research (MIUR), the Italian Space Agency (ASI), and the Autonomous Region of Sardinia (RAS) and is operated as a National Facility by the National Institute for Astrophysics (INAF).
EPTA members acknowledge support by the National SKA programme of China (2020SKA0120100, PI. Lee), Max-Planck Partner Group, NSFC 11690024, CAS Cultivation Project for FAST Scientific.
EPTA work is also supported by the ``LEGACY'' MPG-CAS collaboration on low-frequency gravitational wave astronomy.
We acknowledge support by the European Commission under the Infrastructure Development Grant ARGOS-CDS (Grant Agreement number: 101094354, PI: Antoniadis).
EPTA was also partially supported by the Stavros Niarchos Foundation (SNF) and the Hellenic Foundation for Research and Innovation (H.F.R.I.) under the 2nd Call of the ``Science and Society --Action Always strive for excellence -- Theodoros Papazoglou'' (Project Number: 01431, PI Antoniadis).
We acknowledge support from the Paris/Ile-de-France Region.
Financial support was provided under the European Union's H2020 ERC Consolidator Grant ``Binary Massive Black Hole Astrophysics'' (BMassive, Grant Agreement: 818691, PI Sesana), the ERC Synergy Grant ``BlackHoleCam'' ( Grant Agreement Number 610058, PI Kramer) and the Advanced Grant LEAP (Grant Agreement Number 227947, PI Kramer).
EPTA has received support by UK's Science and Technology Facilities Council (STFC; grant ST/W000946/1) and the Royal Society and Wolfson Foundation
Financial support was provided by the Deutsche Forschungsgemeinschaft (DFG) through the Heisenberg programme (Project No. 433075039, PI Verbiest) and the the Walter--Benjamin programme (Projektnummer PO 2758/1--1, PI Porayko)
We acknowledge support from the research grant “iPeska” (PI Possenti) funded under the INAF national call Prin-SKA/CTA approved with the Presidential Decree 70/2016 (Italy).
We acknowledge financial support from the Special Account for Research Funds of the Hellenic Open University (ELKE-HOU) under the research programme ``GRAVPUL'' (grant agreement 319/10-10-2022, PI. Caballero).
EPTA is also supported from the Dutch National Science Agenda, NWA Startimpuls – 400.17.608.