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UID:20260610T164412EDT-6911UpxVvi@132.216.98.100
DTSTAMP:20260610T204412Z
DESCRIPTION:Title: K-contact Distance for Noisy Nonhomogeneous Spatial Poin
 t Data and Application to Repeating Fast Radio Burst Sources.\n\nAbstract:
  \n\nIn this talk\, I’ll introduce an approach to analyze nonhomogeneous P
 oisson processes (NHPP) observed with noise which focuses on previously un
 studied second-order characteristics of the noisy process. Utilizing a hie
 rarchical Bayesian model with noisy data\, we first estimate hyperparamete
 rs governing a physically motivated NHPP intensity. Leveraging the posteri
 or distribution\, we then infer the probability of detecting a certain num
 ber of events within a given radius\, the k-contact distance. This methodo
 logy is demonstrated by its motivating application: observations of fast r
 adio bursts (FRBs) detected by the Canadian Hydrogen Intensity Mapping Exp
 eriment’s FRB Project (CHIME/FRB). The approach allows us to identify repe
 ating FRB sources by computing the probability of observing k physically i
 ndependent sources within some radius in the detection domain\, or the pro
 bability of coincidence (PC). Applied\, the new methodology improves the r
 epeater detection PC\, in 86% of cases when applied to the largest sample 
 of previously classified observations\, with a median improvement factor (
 existing metric over PC from our methodology) of ~ 3000. Throughout the ta
 lk\, I will provide the necessary astrophysical context to motivate the ap
 plication and highlight some of the other active statistical problems in F
 RB science.\n\nSpeaker\n\nAmanda M. Cook is Banting postdoctoral fellow at
  the Trottier Space Institute & Physics Department at McGill University an
 d holds a guest affiliation at the University of Amsterdam’s Anton Panneko
 ek Institute for Astronomy. She develops and applies statistical methodolo
 gy to answer questions about the nature of fast radio bursts (FRBs) and to
  study the otherwise invisible gas between stars and galaxies that FRBs tr
 avel through. \n\nhttps://mcgill.zoom.us/j/81986712072\n\nMeeting ID: 819 
 8671 2072\n\nPasscode: None\n\n \n
DTSTART:20251010T193000Z
DTEND:20251010T203000Z
LOCATION:Room 1104\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue
  Sherbrooke Ouest
SUMMARY:Amanda M. Cook (McGill)
URL:https://www.mcgill.ca/mathstat/channels/event/amanda-m-cook-mcgill-3681
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