A5043116890- Gamma-ray bursts and supernovae
- Particle Detector Development and Performance
- Particle Accelerators and Free-Electron Lasers
- Pulsars and Gravitational Waves Research
- SAS software applications and methods
- Nuclear Physics and Applications
- Astrophysics and Cosmic Phenomena
- Paleopathology and ancient diseases
- Stellar, planetary, and galactic studies
- Particle physics theoretical and experimental studies
- Astro and Planetary Science
- Distributed and Parallel Computing Systems
- Dark Matter and Cosmic Phenomena
- Spacecraft Design and Technology
- Astronomical Observations and Instrumentation
- Spectroscopy and Chemometric Analyses
- Space exploration and regulation
- Space Science and Extraterrestrial Life
- Radiation Therapy and Dosimetry
- Gaussian Processes and Bayesian Inference
- Nuclear physics research studies
- Astrophysical Phenomena and Observations
Max Planck Institute for Extraterrestrial Physics
2017-2022
Technical University of Munich
2019
University of Padua
2017
Max Planck Society
2017
Despite over 50 years of research, many open questions remain about the origin and nature GRBs. Polarization measurements prompt emission these extreme phenomena have long been thought to be key answering a range questions. The POLAR detector was designed produce first set detailed reliable polarization in an energy approximately 50-500 keV. During late 2016 early 2017, detected total 55 Analysis results 5 GRBs reported past. were found consistent with low or unpolarized flux. However,...
Simultaneous $\gamma$-ray measurements of gamma-ray burst (GRB) spectra and polarization offer a unique way to determine the underlying emission mechanism(s) in these objects as well probing particle acceleration that lead observed emission. Herein we examine jointly-observed data from POLAR GBM GRB 170114A its spectral properties seek understand processes generate observations. We aim develop an extensible statistically sound framework for types applicable other instruments. leverage...
The localizations of gamma-ray bursts (GRBs) detected with the Gamma-ray Burst Monitor (GBM) onboard Fermi satellite are known to be affected by significant systematic errors 3-15 degrees. This is primarily due mismatch employed Band function templates and actual GRB spectrum. problem can avoided simultaneously fitting for location spectrum a GRB, as demonstrated an advanced localization code, BALROG (arXiv:1610.07385). Here, we analyze in way sample 105 bright GBM-detected GRBs which...
The accurate localization of gamma-ray bursts remains a crucial task. While historically, improved have led to the discovery afterglow emission and realization their cosmological distribution via redshift measurements, more recent requirement comes with potential studying kilonovae neutron star mergers. Gravitational wave detectors are expected provide locations not better than 10 square degrees over next decade. With increasing horizon for merger detections also intensity kilonova drops,...
With the confirmed detection of short gamma-ray burst (GRB) in association with a gravitational wave signal, we present first fully Bayesian {\it Fermi}-GBM GRB spectral catalog. Both peak flux and time-resolved results are presented. Additionally, release full posterior distributions reduced data from our sample. Following previous study, introduce three variability classes based observed light curve structure.
The recent coincident detection of gravitational waves (GW) from a binary neutron star merger with aLIGO/Virgo and short-lived gamma-ray emission Fermi/GBM (called GW 170817) is milestone for the establishment multi-messenger astronomy. Merging stars (NS) represent standard scenario short-duration (< 2 sec) bursts (GRBs) which are produced in collimated, relativistically expanding jet an opening angle few degrees bulk Lorentz factor 300-1000. While present aLIGO consistent predictions,...
The detection of a faint, short gamma-ray burst (GRB) in coincidence with the gravitational wave (GW) by aLIGO/Virgo is at odds expected known luminosity and redshift distribution GRBs (sGRB). Examining observer-frame parameter space all Fermi-GBM sGRBs shows that sGRB associated GW 170817A extreme its combination flux, spectral softness temporal structure. We identify group similar GRBs, one which has been to bright galaxy at 75 Mpc. speculate good fraction previously detected faint not...
Over the past two decades, both X-ray and gamma-ray astronomy have experienced great progress. However, region of electromagnetic spectrum around ∼1 MeV is not so thoroughly explored. Future medium-sized telescopes will fill this gap in observations. As timescale for development launch a medium-class mission ∼10 years, with substantial costs, we propose different approach immediate future. In paper, evaluate viability much smaller cheaper detector: nano-satellite Compton telescope, based on...