to watch for variation in their time-keeping that might indicate a passing gravitational wave. CHIME is able to detect the mysterious extragalactic fast radio bursts (FRBs) that last just milliseconds and have no well established astrophysical explanation.

21-cm absorbers

21-cm absorption systems are signatures of cold neutral hydrogen gas detected in radio spectra, and serve as sensitive probes of gas reservoirs in and around galaxies across

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