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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:5
UID:UW-Physics-Event-8228
DTSTART:20230511T193000Z
DTEND:20230511T203000Z
DTSTAMP:20260414T031154Z
LAST-MODIFIED:20230511T190147Z
LOCATION:CH4274/https://wipac-science.zoom.us/j/98113285101?pwd=RlNKY2
 I4Uzg5K2QxVWJmZTJ4eVpWQT09
SUMMARY:Gravitational Wave Science with Gamma Rays\, NPAC (Nuclear/Par
 ticle/Astro/Cosmo) Forum\, Matthew Kerr \, US Naval Research Laborator
 y
DESCRIPTION:The Fermi Large Area Telescope (LAT) has now detected gamm
 a-ray pulsations from over 100 millisecond pulsars\, and its <300ns ti
 mes tamping and nearly-unchanged experimental setup enable high-precis
 ion pulsar timing over its 15-year baseline.  It is thus a "Gamma-ray 
 Pulsar Timing Array" (PTA).  Gamma rays are unaffected by propagation 
 through the ionized interstellar medium\, and the high-energy data thu
 s enable the separation of propagation effects from the "spin noise" i
 ntrinsic to pulsars\, perhaps arising from crustal superfluid turbulen
 ce.  This capability in turns provides a clean measurement the correla
 ted signals expected to be induced by nHz gravitational waves from mer
 ging supermassive black holes.  I will compare this approach with radi
 o PTAs and present recent results from the Gamma-ray PTA.  In a second
  part\, I will also present an overview and early results from Glowbug
 \, a sensitive gamma-ray burst experiment built at NRL and recently la
 unched to the International Space Station.  Its large area and sensiti
 ve onboard burst detection algorithm will improve the odds of detectin
 g short gamma-ray bursts associated with neutron star mergers\, and it
 s primary mission will completely overlap the O4 observing run of LIGO
 /Virgo/Kagra.
URL:https://www.physics.wisc.edu/events/?id=8228
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