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Physics Colloquium – Aaron Viets
April 5 @ 3:30 pm - 4:30 pm
Aaron Viets, PhD Candidate, University of Wisconsin-Milwaukee
Optimizing Advanced LIGO’s Scientific Output with Fast, Accurate, Clean Calibration
Fast, accurate calibration of Advanced LIGO data is an essential part of gravitational-wave astronomy, necessary for prompt electromagnetic follow-up of gravitational-wave events and reliable estimation of source parameters.
I will discuss methods used in both low and high latency to produce the calibrated strain signal h(t). I will highlight recent improvements that have been made to improve the calibration process during and after the second observing run. These include the application of frequency-dependent corrections to the calibration using adaptive filters, reduction in calibration latency, and the subtraction of excess noise from h(t) in low latency.