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Canadian Hydrogen Intensity Mapping Experiment

(radio telescope mapping distant neutral hydrogen)

The Canadian Hydrogen Intensity Mapping Experiment (CHIME, sometimes further abbreviated as CH) is a radio telescope in British Columbia, Canada to map the distribution of neutral hydrogen in the redshift range of 0.8 to 2.5 (hydrogen intensity mapping). It consists of four cylindrical reflectors in a static configuration, i.e., a cylindrical telescope. It views half the sky by sweeping out a longitudinal arc over the course of the Earth's rotation. It aims to observe the 21-cm line redshifted to its frequency range of 400 MHz to 810 MHz. It began science observations in 2018. With its operation it has also become an important tool for fast radio burst (FRB) observation.

The Canadian Hydrogen Observatory and Radio-transient Detector (CHORD) is a plan for a substantial upgrade to CHIME to improve its ability to observe radio transients. It would add a substantial array of 512 6-meter dish telescopes at the current CHIME location as well as cylindrical and dish telescopes at other locations to serve as outriggers, to provide much better information regarding the location of the transient radio sources within the celestial sphere. It aims at a wider bandwidth than the existing CHIME (300-1500 MHz). The Deep Dish Development Array (D3A) is a test array for the dish telescopes.

Further reading:
370mm810MHz3.4μeVbeginCanadian Hydrogen Intensity Mapping Experiment
750mm400MHz1.7μeVendCanadian Hydrogen Intensity Mapping Experiment
/Lookback Years
.82.26Gpc7.38GlynearestCanadian Hydrogen Intensity Mapping Experiment
2.53.64Gpc11.87GlyfurthestCanadian Hydrogen Intensity Mapping Experiment

Referenced by pages:
cylindrical telescope
Dominion Radio Astrophysical Observatory (DRAO)
fast radio burst (FRB)
transit telescope