BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Integrated 3-point correlation functions of weak lensing cosmic sh
 ear - Dr Anik Halder (Institute of Astronomy)
DTSTART:20250224T160000Z
DTEND:20250224T170000Z
UID:TALK223069@talks.cam.ac.uk
CONTACT:65128
DESCRIPTION:Most statistical analyses currently performed on weak lensing 
 cosmic shear data are focused on the evaluation of 2-point correlation fun
 ctions (2PCFs). Several challenges (e.g. computationally expensive estimat
 ion\, severe lack of theoretical models etc.) have kept the analysis of hi
 gher-order (beyond 2-point) statistics on data rather few. To overcome the
 se challenges\, we have introduced a practical and efficient to estimate h
 igher-order cosmic shear statistic called the integrated 3-point correlati
 on function (i3PCF). In this talk I will present the framework for measuri
 ng the i3PCF\, modelling and speeding up their analytical predictions usin
 g neural network emulators\, and show how compared to a 2PCF-only analysis
 \, a combined 2PCF & i3PCF analysis can lead to significant improvements i
 n the constraints of cosmological parameters as analysed on Dark Energy Su
 rvey Year 3 data. I will end the talk by discussing potential applications
  of the i3PCF within a simulation-based inference (SBI) framework.
LOCATION:Martin Ryle Seminar Room\, KICC
END:VEVENT
END:VCALENDAR