(Background Imaging of Cosmic Extragalactic Polarization)
(survey to measure the polarization of the CMB)
BICEP2 is a survey of CMB polarization
carried out at the South Pole Station. An earlier survey was called BICEP.
The Keck Array and BICEP3 are follow-on surveys/telescopes
at the South Pole pursuing the same goals.
The terms also refer to the survey-specific telescopes used.
It was announced in early 2014 that BICEP2 detected
B-mode (polarization modes) gravitational waves from the
early universe, offering evidence of inflation,
but further analysis concluded that
dust within the Milky Way
could produce such a signal,
so the observation was inconclusive.
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