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X-WR-CALDESC:Events for INPA
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TZOFFSETFROM:-0800
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DTSTART:20170312T100000
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170407T120000
DTEND;TZID=America/Los_Angeles:20170407T130000
DTSTAMP:20260527T233452
CREATED:20170221T225206Z
LAST-MODIFIED:20170405T203941Z
UID:151-1491566400-1491570000@inpa.lbl.gov
SUMMARY:Pierre Sokolsky (Utah) - Ultra-High Energy Cosmic Rays: Complex Spectral Structure and Evidence for  Anisotropy in the Northern Sky
DESCRIPTION:We present recent results from the Telescope Array (TA) collaboration on the spectrum and anisotropy of cosmic rays from 1015 to 1020 eV. The simple power law spectrum thought to be exhibited by cosmic rays is now known to be considerably more complex\, with at least four features present in this energy region in addition to the spectral cut-off at 5×1019 eV. The evidence for these structures and their possible origin will be discussed. At the highest energies\, a clustering of events ( a “hot spot”)  is observed in the neighborhood of Ursa Major with a 3.4 to 4.0 sigma significance ( depending on methodology). If confirmed\, this would be the first significant observation of a ultra-high energy cosmic ray source. The “hot spot” is consistent with originating from M82\, a nearby starburst galaxy.
URL:https://inpa.lbl.gov/event/pierre-sokolsky-utah/
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170414T120000
DTEND;TZID=America/Los_Angeles:20170414T130000
DTSTAMP:20260527T233452
CREATED:20170329T165949Z
LAST-MODIFIED:20170410T161458Z
UID:208-1492171200-1492174800@inpa.lbl.gov
SUMMARY:Samuel Flender (ANL) - Cosmology and the Sunyaev-Zel’dovich sky: Observations and simulations
DESCRIPTION:The Sunyaev-Zel’dovich (SZ) effect is an important observational signature of galaxy clusters\, the largest objects in the Universe today. In particular\, the pairwise kinematic SZ signal probes the matter-velocity correlation function\, scaled by the average optical depth of galaxy clusters\, and is thus an interesting probe both from a cosmological and astrophysical point of view. In this talk\, I will give an overview about our current cosmological understanding\, highlighting the role of the SZ effect. I will present the current landscape of kinematic SZ measurements\, including a recent measurement by the South Pole Telescope collaboration and the Dark Energy Survey collaboration\, as well as insights from new\, state-of-the-art simulations\, and recent progress in the modeling of gas profiles of galaxy clusters.
URL:https://inpa.lbl.gov/event/samuel-flender-anl-cmb-and-large-structures/
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170421T120000
DTEND;TZID=America/Los_Angeles:20170421T130000
DTSTAMP:20260527T233452
CREATED:20170303T221606Z
LAST-MODIFIED:20170306T224158Z
UID:180-1492776000-1492779600@inpa.lbl.gov
SUMMARY:Ken Chen (NAOJ) - Lighting up the Universe with Extreme Supernovae
DESCRIPTION:Recent all-sky transient searches have discovered new and unexpected explosion types that fall outside traditional SN classification schemes. These exotic outliers in many cases are due to the deaths of massive stars and therefore may have been prevalent in the primordial universe because the Pop III IMF is thought to be top-heavy. Depending on the mass of the progenitor\, these outliers may be faint\, magnetar-powered\, pair-instability\, or general relativistic instability SNe\, all of which have unique observational signatures. Some of these events are superluminous\, 10-100 times brighter than normal supernovae\, and may produce energetic UV\, X-ray\, or gamma-ray bursts. Their extreme luminosities enable their detection at z > 10 and they are ideal probes of the primordial universe at cosmic dawn\, prior to the advent of the first galaxies. Here\, we examine these exotic explosions with state of the art 3D radiation-hydro simulations that bridge all spatial scales from the central engine to breakout into the IGM\, where observational signatures can be computed. We discuss the coevolution of radiation and turbulent mixing in SN ejecta and present realistic light curves for these explosions for JWST and the coming generation of extremely large telescopes (ELTs). Detection rates for Pop III SNe can place useful constraints on the primordial IMF\, and their nucleosynthetic yields can be used to study the chemical compositions of extreme metal poor stars.
URL:https://inpa.lbl.gov/event/ken-chen-naoj/
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DTSTART;TZID=America/Los_Angeles:20170428T120000
DTEND;TZID=America/Los_Angeles:20170428T130000
DTSTAMP:20260527T233452
CREATED:20170223T191556Z
LAST-MODIFIED:20230827T174001Z
UID:155-1493380800-1493384400@inpa.lbl.gov
SUMMARY:Javier Caravaca Rodriguez (UCB) -  Cherenkov and Scintillation light separation with the CHESS experiment
DESCRIPTION:The first step toward construction of a hybrid optical detector like THEIA is the demonstration of separation of scintillation and Cherenkov light in liquid scintillators (LS). This would allow reconstruction of particle directionality in a low energy threshold detector\, and provide improved particle identification. The CHESS experiment successfully images Cherenkov rings on LS such as LAB and LAB with PPO\, demonstrating this separation. Despite the relatively high light yield of the scintillation light with respect to the Cherenkov light\, the latter is successfully identified thanks to the characteristic prompt emission time of a few picoseconds\, as oppose to the typical nanoseconds delays of the scintillation emission. Low time jitter PMTs ($\sim300ps$) and fast digitization ($5GHz$) provides a precision well below the nanosecond level\, making the time separation possible. Recent results obtained with pure LS and preliminary studies for newly developed water-based LS materials will be presented.
URL:https://inpa.lbl.gov/event/javier-caravaca-robriguez/
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