= IceCube Neutrino Observatory
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= IceCube
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<IceCube> turns Antarctic <ice> into a <Cherenkov detector>: $5160$ <digital optical modules> on $86$ strings span depths of $1450$–$2450\,\mathrm m$. Hot-water drilling allowed deployment before refreezing. <Neutrino> interactions produce <charged particles>; their <Cherenkov radiation>, rather than the incoming <neutrino>, supplies the optical readout.<The IceCube Neutrino Observatory: Instrumentation and Online Systems by IceCube Collaboration>[Sections 1.1.1, 5.1: array and deployment]{ref}
<Neutrino astronomy> asks where the incoming <neutrino> originated. A <Cherenkov detector> asks how its reaction products make measurable light. Connecting these questions requires <track reconstruction>, <detection efficiency> and background tests. An astronomical messenger and the light carrying information inside the apparatus are different stages of one inference.
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