A5052959119- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Nuclear Physics and Applications
- Stellar, planetary, and galactic studies
- Particle Detector Development and Performance
- Astro and Planetary Science
- Pulsars and Gravitational Waves Research
- Dark Matter and Cosmic Phenomena
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
- Nuclear physics research studies
- Solar and Space Plasma Dynamics
- Radiation Detection and Scintillator Technologies
- Geophysics and Gravity Measurements
- Galaxies: Formation, Evolution, Phenomena
- Particle Accelerators and Free-Electron Lasers
- Neutrino Physics Research
- Radiation Therapy and Dosimetry
- Planetary Science and Exploration
- Scientific Research and Discoveries
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- Medical Imaging Techniques and Applications
Max Planck Institute for Extraterrestrial Physics
2015-2024
Excellence Cluster Origins
2022-2024
Excellence Cluster Universe
2013-2022
Technical University of Munich
2012-2022
Institut d'Astrophysique de Paris
2011-2020
Max Planck Institute for Astrophysics
2019
Max Planck Society
2009-2018
National Astronomical Observatory of Japan
2018
University of California, Los Angeles
2018
Istituto Nazionale di Fisica Nucleare
2018
The Gamma-Ray Burst Monitor (GBM) will significantly augment the science return from Fermi Observatory in study of gamma-ray bursts (GRBs). primary objective GBM is to extend energy range over which are observed downward Large Area Telescope (LAT) on into hard X-ray where extensive previous data sets exist. A secondary compute burst locations onboard allow re-orienting spacecraft so that LAT can observe delayed emission bright bursts. uses an array 12 sodium iodide scintillators and two...
SPI is a high spectral resolution gamma-ray telescope on board the ESA mission INTEGRAL (International Gamma Ray Astrophysics Laboratory). It consists of an array 19 closely packed germanium detectors surrounded by active anticoincidence shield BGO. The imaging capabilities instrument are obtained with tungsten coded aperture mask located 1.7 m from Ge array. fully field-of-view , partially field view amounts to and angular . energy range extends 20 keV 8 MeV typical 2.5 at 1.3 MeV. Here we...
view Abstract Citations (396) References (29) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Instrument Description and Performance of the Imaging Gamma-Ray Telescope COMPTEL aboard Compton Observatory Schoenfelder, V. ; Aarts, H. Bennett, K. de Boer, Clear, J. Collmar, W. Connors, A. Deerenberg, Diehl, R. von Dordrecht, den Herder, Hermsen, Kippen, M. Kuiper, L. Lichti, G. Lockwood, Macri, McConnell, Morris, D. Much, Ryan, Simpson, Snelling, Stacy, Steinle,...
Abstract We report the INTernational Gamma-ray Astrophysics Laboratory ( INTEGRAL ) detection of short gamma-ray burst GRB 170817A (discovered by Fermi -GBM) with a signal-to-noise ratio 4.6, and, for first time, its association gravitational waves (GWs) from binary neutron star (BNS) merging event GW170817 detected LIGO and Virgo observatories. The significance between observed is 3.2σ, while -GBM detections 4.2σ. was SPI-ACS instrument about 2 s after end GW event. measure fluence (1.4 ±...
The first $\ensuremath{\gamma}$-ray line originating from outside the Solar System that was ever detected is 511 keV emission positron annihilation in Galaxy. Despite 30 years of intense theoretical and observational investigation, main sources positrons have not been identified up to now. Observations 1990s with OSSE/CGRO (Oriented Scintillation Spectrometer Experiment on GRO satellite/Compton Gamma Ray Observatory) showed strongly concentrated toward Galactic bulge. In 2000s, spectrometer...
Observations of GRB 100724B with the Fermi Gamma-Ray Burst Monitor find that spectrum is dominated by typical Band functional form, which usually taken to represent a non-thermal emission component, but also includes statistically highly significant thermal spectral contribution. The simultaneous observation and components allows us confidently identify two components. fact these seem vary independently favors idea component photospheric origin while dominant occurs at larger radii. Our...
In this catalog we present the updated set of spectral analyses GRBs detected by Fermi Gamma-Ray Burst Monitor (GBM) during its first four years operation. It contains two types spectra, time-integrated fits and at brightest time bin, from 943 triggered GRBs. Four different models were fitted to data, resulting in a compendium more than 7500 spectra. The analysis was performed similarly, but not identically Goldstein et al. 2012. All 487 have been re-fitted using same methodology as that 456...
We report the first measurements of 511 keV line emission from Galactic Centre (GC) region performed with spectrometer SPI on space observatory INTEGRAL (International Gamma-Ray Astrophysics Laboratory). Taking into account range spatial distribution models which are consistent data, we derive a flux ph cm-2 s-1 and an intrinsic width (FWHM). The results other high-spectroscopy measurements, though is found to be at upper bound previously reported values.
We present the time-averaged characteristics of Crab pulsar in 0.75-30 MeV energy window using data from imaging Compton Telescope COMPTEL aboard Gamma-Ray Observatory (CGRO) collected over its 9 year mission. Exploiting exceptionally long exposure on allowed us to derive significantly improved spectra for nebula and emissions, first time accurately determine at low-energy γ-rays pulse profile as a function energy. These timing data, showing well-known main second phase separation ~ with...
We use Swift BAT Earth occultation data at different geomagnetic latitudes to derive a sensitive measurement of the cosmic X-ray background (CXB) and albedo emission in 15-200 keV band. compare our CXB spectrum with recent (INTEGRAL, BeppoSAX) past results (HEAO-1) find good agreement. Using an independent we are able confirm results. This study shows that has normalization ~8% ± 3% larger than HEAO-1 measurement. The accurate can be used predict level photon for satellites low mid...
We present systematic spectral analyses of GRBs detected by the Fermi Gamma-Ray Burst Monitor (GBM) during its first two years operation. This catalog contains types spectra extracted from 487 GRBs, and fitting four different models, this results in a compendium over 3800 spectra. The models were selected based on their empirical importance to shape many analysis performed was devised be as thorough objective possible. describe detail our procedure criteria for analyses, bulk form parameter...
Aims. We study the spectrum of cosmic X-ray background (CXB) in energy range ~5-100 keV.
Aims.Gamma-ray line emission from radioactive decay of 60Fe provides constraints on nucleosynthesis in massive stars and supernovae.
The Crab Nebula is the only hard X-ray source in sky that both bright enough and steady to be easily used as a standard candle. As result, it has been normalization by most X-ray/gamma-ray telescopes. Although small-scale variations nebula are well known, since start of science operations Fermi Gamma-ray Burst Monitor (GBM) 2008 August, ∼7% (70 mCrab) decline observed overall flux 15–50 keV band, measured with Earth occultation technique. This independently confirmed ∼15–50 band three other...
The annihilation of positrons in the Galaxy's interstellar medium produces characteristic gamma-rays with a line at 511 keV. This emission has been observed spectrometer SPI on INTEGRAL, confirming puzzling morphology bright from an extended bulge-like region, and faint disk emission. Most plausible sources are believed to be distributed throughout Galaxy. We aim constrain spectral shapes for different spatial components bulge high-resolution gamma-ray SPI, based new instrumental background...
Using observations of the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL), we put upper limits on gamma-ray and hard X-ray prompt emission associated with gravitational wave event GW150914, discovered by LIGO/Virgo collaboration. The omni-directional view INTEGRAL/SPI-ACS has allowed us to constrain fraction energy emitted in electromagnetic component for full high-probability sky region LIGO trigger. Our fluence at time range from $F_{\gamma}=2 \times 10^{-8}$ erg cm$^{-2}$...
The Fermi Gamma-ray Burst Monitor (GBM) is designed to enhance the scientific return from in studying gamma-ray bursts (GRBs). In its first two years of operation GBM triggered on 491 GRBs. We summarize criteria used for triggering and quantify general characteristics GRBs, including their locations, durations, peak flux, fluence. This catalog an official product science team, data files containing complete results are available High-Energy Astrophysics Science Archive Research Center.
Type-Ia supernovae result from binary systems that include a carbon-oxygen white dwarf, and these thermonuclear explosions typically produce 0.5 M_solar of radioactive 56Ni. The 56Ni is commonly believed to be buried deeply in the expanding supernova cloud. Surprisingly, SN2014J we detected lines at 158 812 keV decay (τ~8.8 days) earlier than expected several-week time scale, only ~20 days after explosion, with flux levels corresponding roughly 10% total amount Some mechanism must break...