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C.L. Wong1, X. Yu2, P. Shum3 and H.P. Ho4 1Division of Microelectronics, School of Electrical & Electronic Engineering Nanyang Technological University, 50 Nanyang Drive, 2Singapore Institute of Manufacturing Technology (SIMTech), 71 Nanyang Drive, 3Division of Communication Engineering, School of Electrical & Electronic Engineering Nanyang Technological(More)
The Keck Array is a cosmic microwave background (CMB) polarimeter that will begin observing from the South Pole in late 2010. The initial deployment will consist of three telescopes similar to BICEP2 housed in ultracompact, pulse tube cooled cryostats. Two more receivers will be added the following year. In these proceedings we report on the design and(More)
Between the BICEP2 and Keck Array experiments, we have deployed over 1500 dual polarized antenna coupled bolometers to map the Cosmic Microwave Background’s polarization. We have been able to rapidly deploy these detectors because they are completely planar with an integrated phased-array antenna. Through our experience in these experiments, we have learned(More)
Hong Kong's feral monkey population is controversial. Many people complain about the aggressiveness of the monkeys, while some conservationists urge the government to deal with the problem in a way that will not harm the monkeys. The population dynamics of the macaques in the Kowloon Hills were studied in 1992 and 1993. Vital statistics are provided from(More)
We report on the design and performance of the Bicep2 instrument and on its three-year data set. Bicep2 was designed to measure the polarization of the cosmic microwave background (CMB) on angular scales of 1◦–5◦( = 40–200), near the expected peak of the B-mode polarization signature of primordial gravitational waves from cosmic inflation. Measuring B-modes(More)
The Bicep2 and Keck Array experiments are designed to measure the polarization of the cosmic microwave background (CMB) on angular scales of 2-4 degrees (l = 50–100). This is the region in which the B-mode signal, a signature prediction of cosmic inflation, is expected to peak. Bicep2 was deployed to the South Pole at the end of 2009 and is in the middle of(More)
BICEP2and the Keck Arrayare polarization-sensitive microwave telescopes that observe the cosmic microwave background (CMB) from the South Pole at degree angular scales in search of a signature of inflation imprinted as B-mode polarization in the CMB. BICEP2was deployed in late 2009, observed for three years until the end of 2012 at 150 GHz with 512(More)
The Keck Array is a system of cosmic microwave background polarimeters, each similar to the BICEP2 experiment. In this paper we report results from the 2012 to 2013 observing seasons, during which the Keck Array consisted of five receivers all operating in the same (150 GHz) frequency band and observing field as BICEP2. We again find an excess of B-mode(More)
We present measurements of polarization lensing using the 150 GHz maps, which include all data taken by the BICEP2andKeck Array Cosmic Microwave Background polarization experiments up to and including the 2014 observing season (BK14). Despite their modest angular resolution (~  0 .5), the excellent sensitivity (∼3μK-arcmin) of these maps makes it(More)
We have developed antenna-coupled transition-edge sensor bolometers for a wide range of cosmic microwave background (CMB) polarimetry experiments, including BICEP2, Keck Array, and the balloon borne SPIDER. These detectors have reached maturity and this paper reports on their design principles, overall performance, and key challenges associated with design(More)