  We present the "Galaxy Cluster Merger Catalog." This catalog provides an
extensive suite of mock observations and related data for N-body and
hydrodynamical simulations of galaxy cluster mergers and clusters from
cosmological simulations. These mock observations consist of projections of a
number of important observable quantities in several different wavebands as
well as along different lines of sight through each simulation domain. The web
interface to the catalog consists of easily browseable images over epoch and
projection direction, as well as download links for the raw data and a JS9
interface for interactive data exploration. The data is presented within a
consistent format so that comparison between simulations is straightforward.
All of the data products are provided in the standard FITS file format. Data is
being stored on the yt Hub (http://hub.yt), which allows for remote access and
analysis using a Jupyter notebook server. Future versions of the catalog will
include simulations from a number of research groups and a variety of research
topics related to the study of interactions of galaxy clusters with each other
and with their member galaxies. The catalog is located at http://gcmc.hub.yt.
