Anne Duerr
A5091411194- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Neutrino Physics Research
- Pulsars and Gravitational Waves Research
- Reproductive Health and Technologies
- Particle accelerators and beam dynamics
- LGBTQ Health, Identity, and Policy
- Astro and Planetary Science
- Reproductive Health and Contraception
- Radio Astronomy Observations and Technology
- Astronomy and Astrophysical Research
University of Utah
2023
Fred Hutch Cancer Center
2008
GRB 221009A ($z=0.151$) is one of the closest known long $\gamma$-ray bursts (GRBs). Its extreme brightness across all electromagnetic wavelengths provides an unprecedented opportunity to study a member this still-mysterious class transients in exquisite detail. We present multi-wavelength observations extraordinary event, spanning 15 orders magnitude photon energy from radio $\gamma$-rays. find that data can be partially explained by forward shock (FS) highly-collimated relativistic jet...
Assuming Galactic cosmic rays originate in supernovae and the winds of massive stars, starburst galaxies should produce very-high-energy (VHE; E$>$100 GeV) gamma-ray emission via interaction their copious quantities with large reservoirs dense gas within galaxies. Such VHE was detected by VERITAS from galaxy M 82 2008-09. An extensive, multi-year campaign followed these initial observations, yielding a total 254 h good quality data on 82. Leveraging modern analysis techniques larger...
While the sources of diffuse astrophysical neutrino flux detected by IceCube Neutrino Observatory are still largely unknown, one promising methods used towards understanding this is investigating potential temporal and spatial correlations between alerts electromagnetic radiation from blazars. We report on multiwavelength target-of-opportunity observations blazar B3 2247+381, taken in response to an multiplet alert for a cluster muon events compatible with source location May 20, 2022...
Abstract Assuming Galactic cosmic rays originate in supernovae and the winds of massive stars, starburst galaxies should produce very-high-energy (VHE; E > 100 GeV) gamma-ray emission via interaction their copious quantities with large reservoirs dense gas within galaxies. Such VHE was detected by VERITAS from galaxy M82 2008–09. An extensive, multiyear campaign followed these initial observations, yielding a total 254 hr good-quality data on M82. Leveraging modern analysis techniques...
Abstract PSR J0901−4046 is a radio neutron star with an ultra-long spin period of 75.88 s. We search 14 yr Fermi-LAT observations for evidence steady gamma-ray emission. find no emission and set 95% upper limit on the flux from 1.4 × 10 −9 photons cm −2 s −1 assuming power law exponential cutoff spectrum.
Abstract While the sources of diffuse astrophysical neutrino flux detected by IceCube Neutrino Observatory are still largely unknown, one promising methods to improve our understanding them is investigating potential temporal and spatial correlations between alerts electromagnetic radiation from blazars. We report on multiwavelength target-of-opportunity observations blazar B3 2247+381, taken in response an multiplet alert for a cluster muon events compatible with source location 2022 May 20...
Abstract Observations of GeV gamma-ray emission from the well-studied mixed-morphology supernova remnant (SNR) W44 by Fermi-Large Area Telescope and AGILE imply that it is a site significant cosmic-ray acceleration. The spectral energy distribution (SED) derived data suggests likely originates decay neutral pions generated interactions. It essential to measure SED in X-ray very-high-energy (VHE) bands verify hadronic origin gauge potential contributions leptonic emission. We report an upper...
Abstract This paper investigates the origin of γ -ray emission from MGRO J1908+06 in GeV–TeV energy band. By analyzing data collected by Fermi Large Area Telescope, Very Energetic Radiation Imaging Telescope Array System, and High Altitude Water Cherenkov, with addition spectral previously reported LHAASO, a multiwavelength study morphological features provides insight into emission. The mechanism behind bright TeV is studied constraining magnetic field strength, source age, distance through...
GRB 221009A ($z=0.151$) is one of the closest known long $γ$-ray bursts (GRBs). Its extreme brightness across all electromagnetic wavelengths provides an unprecedented opportunity to study a member this still-mysterious class transients in exquisite detail. We present multi-wavelength observations extraordinary event, spanning 15 orders magnitude photon energy from radio $γ$-rays. find that data can be partially explained by forward shock (FS) highly-collimated relativistic jet interacting...