Gen Relativ Gravit (2014) 46:1688 DOI 10.1007/s10714-014-1688-0 REVIEW ARTICLE Relativistic astrophysics at GR20 Ilya Mandel · M. Coleman Miller · Bobomurat J. Ahmedov · Cosimo Bambi · Christopher P. L. Berry · Jeandrew Brink · Duncan Brown · Eliana Chaverra · A. I. Chugunov · Stephen Fairhurst · Chris Fryer · Jonathan R. Gair · Dorota Gondek-Rosinska · Leonardo Gualtieri · M. E. Gusakov · Mark Hannam · Ian Harry · E. M. Kantor · Wlodek Kluzniak · Marcin Kucaba · Georgios Lukes-Gerakopoulos · H. Meheut · Andrew Melatos · Viktoriya S. Morozova · T. Paumard · Nikolaos Stergioulas · Anna Studzinska · Magda Szkudlarek · Odele Straub · G. Torok · P. Varniere · F. H. Vincent · Mateusz Wisniewicz · M. Wildner · Clifford Will · Kent Yagi · Olindo Zanotti · Shuang-Yong Zhou Received: 30 November 2013 / Accepted: 10 January 2014 / Published online: 12 April 2014 © Springer Science+Business Media New York 2014 Abstract We report the recent advances in Relativistic Astrophysics as presented at the GR20 meeting in Warsaw, Poland, in July 2013. Keywords Black holes · Neutron stars · Gravitational waves This article belongs to the Topical Collection: The First Century of General Relativity: GR20/Amaldi10. I. Mandel (B ) · C. P. L. Berry School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK e-mail: imandel@star.sr.bham.ac.uk M. C. Miller Department of Astronomy and Joint Space-Science Institute, University of Maryland, College Park, MD 20742, USA B. J. Ahmedov Institute of Nuclear Physics, Ulughbek, Tashkent 100214, Uzbekistan C. Bambi Department of Physics, Fudan University, Shangai, China C. P. L. Berry. J. R. Gair Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK 123