Grant: Alliance Grants

CHIME, the Canadian Hydrogen Intensity-Mapping Experiment (www.chime-experiment.ca), is truly a breakthrough radio telescope. With it, Canadian researchers have transformed the field of transient astrophysics, discovering over 4,000 fast radio bursts (FRBs), including over 50 repeating sources, all arriving from across the cosmos, along with an FRB from a Milky Way magnetar. CHIME has also performed the highest redshift neutral hydrogen intensity mapping survey to date, and has become an important part of the global effort to study radio pulsars, rapidly rotating, highly magnetized neutron stars. It measures signal arrival times for all pulsars visible in North America, most of these at daily cadence. The demonstrated power of this prize-winning instrument has attracted a large and talented team to base their research on it, and multiple new experiments are planned. The team is building remote companion "outrigger" telescopes to allow precision localisation of the source of each FRB. They have also built an instrument to scan for slow spin-rate pulsars, designed a method to study the Milky Way's magnetic field, and a data analysis pipeline to search for direct evidence of cosmic acceleration. We propose here for 5 years of operating funds to allow us to continue to run CHIME to accomplish multiple forefront science goals, and to continue to engage a large fraction of the Canadian astrophysical community, as well as researchers from around the globe.