GR21 participant list Name Affiliation Country Ernazar Abdikamalov Nazarbayev University Kazakhstan Majidin Abdullah ExxonMobil Malaysia (Retired) Malaysia Gezahegn Zewdie Abebe University of KwaZulu-Natal South Africa Marek Abramowicz Copernicus Astronomical Centre, Warsaw Poland Andrés Aceña CONICET; Observatorio Astronómico de Quito, EPN Ecuador Ivan Agullo Louisiana State University United States Mohammad Akbar University of Texas at Dallas United States Jailson Alcaniz OBSERVATÓRIO NACIONAL Brazil Gabrielle Allen University of Illinois United States Jan Åman Stockholm University Sweden Jan Ambjorn Niels Bohr Institute Denmark Malcolm Anderson Universiti Brunei Darussalam Brunei Paul Anderson Wake Forest University United States Håkan Andreasson University of Gothenburg Sweden Katsuki Aoki Waseda University Japan Adriana Araujo IFT UNESP Brazil Abhay Ashtekar IGC, Penn State United States Eric Aspling none United States Maria Babiuc-Hamilton Marshall University United States Pavel Bakala Silesian University in Opava Czech Republic William Ballik Queen\'s University at Kingston Canada Leor Barack University of Southampton United Kingdom Carlos Barceló Instituto de Astrofísica de Andalucía Spain Bryan Barr University of Glasgow United Kingdom Juan Barranco Universidad de Guanajuato Mexico Masha Baryakhtar Perimeter Institute Canada Jason Baxter Sheffield Hallam University United Kingdom Andrew Beckwith Chongqing University China Dionigi Benincasa SISSA Italy Eloisa Bentivegna Università degli Studi di Catania Italy Sayantani Bera Tata Institute of Fundamental Research, Mumbai. India Beverly Berger ISGRG United States Argelia Bernal Universidad Autonoma del Estado de Hidalgo Mexico Laura Bernard Institut d\'Astrophysique de Paris FRANCE Sebastiano Bernuzzi Parma U & INFN Italy Emanuele Berti University of Mississippi United States Eugenio Bianchi Penn State University United States Stefano Bianco Max Planck Institute for Gravitational Physics Germany Nigel Bishop Rhodes University South Africa Jonathan Blackman California Institute of Technology United States Robert Bluhm Colby College United States Brett Bochner Hofstra University United States Alejandro Bohe Albert Einstein Institute (Potsdam) Germany Yuri Bonder Universidad Nacional Autonoma de Mexico Mexico Beatrice Bonga Penn State United States Jonathan Braden University College London United Kingdom Suddhasattwa Brahma Fudan University, Shanghai China Byron Brassel University of KwaZulu-Natal South Africa Nora Breton Centro de Investigación y de Estudios Avanzados del I.P.N. Mexico Leo Brewin Monash University Australia Richard Brito Instituto Superior Técnico Portugal Bernd Bruegmann University of Jena Germany Claia Bryja City College of San Francisco United States Igor Bulyzhenkov MIPT and Lebedev Physics Institute RAS Russia Luke Butcher University of Edinburgh, UK United Kingdom Nicolas Caballero Max Planck Institute for Radio Astronomy Germany Miriam Cabero Mueller Albert Einstein Institute Hannover Germany Juan Calderon Bustillo Georgia Institute of Technology United States Antonio Capolupo Department of Physics, University of Salerno, Salerno, Italy Italy Alejandro Cardenas-Avendano Fundacion Universitaria Konrad Lorenz Colombia Vitor Manuel Cardoso Instituto Superior Tecnico Universidad de Lisboa Portugal Steven Carlip UC Davis United States Bernard Carr Queen Mary University of London United Kingdom Diego Antonio Carranza Ortiz Queen Mary University of London United Kingdom Federico Carrasco FaMAF-Universidad Nacional de Cordoba, IFEG-CONICET. Argentina Marc Casals Brazilian Center for Research in Physics (CBPF) Brazil Claudio Castro University of Vale do Paraíba Brazil Sarani Chakraborty Assam University, Silchar India Po-Wen Chang National Taiwan University Taiwan Shami Chatterjee Cornell University United States Pradip Kumar Chattopadhyay Alipurduar College India Lin-Qing Chen Perimeter Institute/University of Waterloo Canada Han-Yu Chia University of Florida United States Takeshi Chiba Nihon University Japan Stefano Chinaglia Istituto Nazionale di Fisica Nucelare (INFN-TIFPA) Italia Cecilia Chirenti UFABC Brazil Nicolai Christiansen Institute for Theoretical Physics, Heidelberg University Germany Alvin Chua Institute of Astronomy, University of Cambridge United Kingdom Riccardo Ciolfi University of Trento Italy Michael Cole Queen Mary University of London United Kingdom Alan Coley dalhousie university canada Aimeric Colléaux Trento University Italy John Conklin University of Florida United States William Cook DAMTP, University of Cambridge United Kingdom Joshua Cooperman Bard College United States Alejandro Corichi UNAM Mexico João Costa Lisbon University Institute-ISCTE/CAMGSD Portugal Daniel Coumbe Niels Bohr Institute Denmark Mariateresa Crosta INAF OATo Italy Pedro V.P. Cunha Aveiro University & IST Lisbon Portugal Maria Elidaiana da Silva Pereira Brazilian Center for Physics Research Brazil Ramin Daghigh Metropolitan State University United States Patrick Das Gupta University of Delhi India Daverio David African Institute for Mathematical Science South Africa Adam Day IOP Publishing United Kingdom Jose de Araujo Instituto Nacional de Pesquisas Espaciais Brazil Birses Debir PhD student Turkey Juan Carlos Degollado Daza Institute for Physical Sciences, UNAM México Adrian del Rio Vega IFIC (University of Valencia - CSIC) Spain Clement Delcamp Perimeter Institute Canada Efthimia Deligianni ZARM, University of Bremen Germany Paul Demmie Albuquerque, NM United States Thomas Dent AEI Hannover Germany Anne-Sylvie Deutsch Penn State United States Krsna Dev St. John Fisher College United States Oscar Dias STAG, Southampton University United Kingdom Tim Dietrich AEI Potsdam Germany Paulino Domínguez Chávez University of Guadalajara México Pietro Dona Fudan University China Xi Dong Institute for Advanced Study United States Michele Doronzo University of Insubria, Como Italy Gustavo Dotti Universidad Nacional de Córdoba Argentina Jean Douçot Ecole normale supérieure, Paris France Anuj Kumar Dubey ASSAM UNIVERSITY, SILCHAR INDIA Richard Dudley Wake Forest University U. S. A. Remigiusz Durka Pontificia Universidad Católica de Valparaíso Chile Christopher Duston Merrimack College United States Vladimir Dzhunushaliev al - Farabi KazNU Kazakhstan William East KIPAC Stanford/SLAC United States David Edwards University of Edinburgh United Kingdom Ernesto Eiroa Instituto de Astronomia y Fisica del Espacio (CONICET-UBA) Argentina Beatriz Elizaga Navascués Institute for the Structure of Matter (IEM) - CSIC Spain Roberto Emparan ICREA & Universitat de Barcelona Spain Netta Engelhardt University of California Santa Barbara United States Myungseok Eune Sangmyung University South Korea David Fajman University of Vienna Austria Marc Favata Montclair State University United States Karan Fernandes S.N.Bose National Center for Basic Sciences India Scott Field Cornell University United States Tehani Finch NASA-Goddard Space Flight Center United States Sebastian Fischetti Imperial College London United Kingdom Eanna Flanagan Cornell University United States Ernesto Flores González Universidad Autónoma Metropolitana Mexico Jose Antonio Font Roda University of Valencia Spain Larry Ford Tufts University United States Carlos Frajuca IFSP - Sao Paulo Federal Institute Brazil Joerg Frauendiener University of Otago New Zealand John Friedman University of Wisconsin-Milwaukee United States Helmut Friedrich Max-Planck-Institut für Gravitationsphysik Germany Maria Eugenia Gabach Clement FaMAF, Universidad Nacional de Cordoba, CONICET Argentina Chad Galley California Institute of Technology United States Rodolfo Gambini Universidad de la Republica Uruguay Chandrima Ganguly DAMTP, University of Cambridge United Kingdom Sijie Gao Beijing Normal University China Alfonso García-Parrado Gómez-Lobo Física Teórica, Universidad del País Vasco Spain David Garfinkle Oakland University United States David Garrison University of Houston Clear Lake United States Edgar Gasperin Garcia Queen Mary University of London United Kingdom Massimo Gengo Università degli studi di Milano Italy Davide Gerosa University of Cambridge United Kingdom Hossein Ghaffarnejad semnan university Iran Sushant Ghosh Centre for Theoretical Physics, Jamia Millia Islamia India Breno Giacchini Centro Brasileiro de Pesquisas Físicas Brazil Matthew Giesler Caltech United States Yongwan Gim Sogang University South Korea Lisa Glaser University of Nottingham United Kingdom Katerina Goluchova Silesian University in Opava Czech Republic Gabriela González Louisiana State University United States Eric Gourgoulhon LUTH, CNRS, Observatoire de Paris, Univ. Paris Diderot France Megandhren Govender Durban University of Technology South Africa Stephen Green Perimeter Institute for Theoretical Physics Canada Michael Green Metropolitan State University United States Lauren Greenspan University of Porto Portugal Daniele Gregoris Dalhousie University Canada Kevin Grosvenor Niels Bohr Institute Denmark Leonardo Gualtieri Sapienza University of Rome Italy Jonathan Guglielmon The Pennsylvania State University United States Sharmila Gunasekaran Memorial University Canada Carsten Gundlach University of Southampton United Kingdom Brajesh Gupt Penn State United States Antonio C Gutierrez-Pieres Instituto de Ciencias Nucleares, UNAM México Lucas Hackl Pennsylvania State University United States Shahar Hadar DAMTP, University of Cambridge United Kingdom Giles Hammond University of Glasgow Scotland Matthias Hanauske Goethe-Universität/Frankfurt Institute for