The Galaxy Cluster Mass Reconstruction Project


The Galaxy Cluster Mass Reconstruction Project (GCMRP) is an on-going collaborative effort aimed at understanding how accurately we can measure galaxy cluster masses using galaxy properties. The project is the first extensive, homogenous, blind test of galaxy-based methods which utilise the positions, velocities, colours and magnitudes of galaxies to estimate cluster mass. Our goals are to quantify the systematic bias, intrinsic scatter and completeness that these methods produce and try to enhance their performance by deducing which type of method or combination of methods is best for a given observational set-up.


The GCMRP project was initiated with a workshop hosted at the University of Nottingham in September 2013 where participating authors from sixteen groups tested their galaxy-based mass estimation techniques on various mock galaxy catalogues that increased in complexity.