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SUMMARY:Building SPT3G 2019/2020 likelihood - Étienne Camphuis (IAP)
DTSTART:20220530T120000Z
DTEND:20220530T130000Z
UID:TALK175145@talks.cam.ac.uk
CONTACT:Dongwon Han
DESCRIPTION:The South Pole Telescope (SPT) is observing the CMB anisotropi
 es with arcminute resolution using its state-of-the-art camera (SPT3G). Co
 nstraints on cosmological parameters from the obtained data will be as tig
 ht as Planck’s one\, while remaining independent from the satellite expe
 riment\, thus allowing to test the consistency of the two dataset and inve
 stigate new physics. A reliable estimation of cosmological parameters requ
 ires accurate covariance matrices. In this talk\, I will present my recent
  work on analytical pseudo-power spectrum covariance matrices for small su
 rvey area. First\, I will introduce an efficient (but computationally expe
 nsive) exact calculation of such matrices. Then\, using it as a reference\
 , I estimate the accuracy of existing and new approximations of the covari
 ance matrix. Finally\, I will present solutions to mitigate the effect of 
 point source masking.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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