CMB polarimetry with BICEP/Keck Array
Grant Teply
Caltech
The BICEP/Keck Array program is a series of telescopes at South Pole
designed to measure CMB polarization on degree angular scales. We will
describe the instrumentation and latest results of the program. Using
data collected through 2013 at 150 GHz, the BICEP2+Keck Array polarization
maps achieve noise levels of 57 nK-deg (3.4 uK-arcmin) over an effective
area of 400 square degrees for a survey weight of 250,000 uK^-2. A strong
excess above the lensing B-mode signal predicted by LCDM is observed,
but a joint analysis with Planck finds the excess to be consistent with
a galactic dust foreground. After correcting for dust, BICEP2+Keck Array
continues to detect lensing B-modes at 7.0 sigma. Keck Array and the
newly installed BICEP3 are actively taking data of the same field at 95
and 220 GHz for further foreground control.
Date: | Wednesday, 11 March 2015 |
Time: | 14:00 |
Where: | McGill University |
| McGill Space Institute (3550 University), Conference Room |
Contact: | Robert Rutledge |
|