Results 41 to 50 of about 6,020,151 (174)
Advanced Optical Materials, Volume 14, Issue 10, 13 March 2026.An optimized RF‐sputtering process is developed for the deposition of n‐doped germanium thin films exhibiting strongly enhanced THz emission under fs‐laser excitation. By tuning deposition temperature and thickness, highly (111)‐oriented films with an effective bandgap of ∼0.77 eV and improved optoelectronic properties are achieved, leading to a ∼35 ...
Sanjit Varma +7 more
wiley +1 more source
Fermi Gamma-Ray Space Telescope [PDF]
, 2009 This slide presentation gives an overview the Fermi Gamma-ray space telescope. It includes information on spectral fitting, useful considerations, and binned vs.
Hays, Elizabeth
core
The 52 Brightest and Hardest GRBs Detected with the Gamma-ray Burst Monitor on Fermi
, 2011 We present our results of the temporal and spectral analysis of a sample of 52 bright and hard gamma-ray bursts (GRBs) observed with the Fermi Gamma-ray Burst Monitor (GBM) during its first year of operation (July 2008-July 2009). Our sample was selected
The Fermi GBM Team, BISSALDI, ELISABETTA
core +1 more source
Relativistic Jets in Gamma-Ray-Emitting Narrow-Line Seyfert 1 Galaxies
Galaxies, 2019 Before the launch of the Fermi Gamma-ray Space Telescope satellite only two classes of active galactic nuclei (AGN) were known to generate relativistic jets and thus to emit up to the γ -ray energy range: blazars and radio galaxies, both hosted
Filippo D’Ammando
doaj +1 more source
Pre-burst events of gamma-ray bursts with light speed variation
Physics Letters B, 2021 Previous researches on high-energy photon events from gamma-ray bursts (GRBs) suggest a light speed variation v(E)=c(1−E/ELV) with ELV=3.6×1017 GeV, together with a pre-burst scenario that hight-energy photons come out about 10 seconds earlier than low ...
Jie Zhu, Bo-Qiang Ma
doaj +1 more source
Cherenkov Telescope Array Observatory: Die Zukunft der Gammaastronomie
Physik in unserer Zeit, Volume 57, Issue 1, Page 10-18, January 2026.Im Jahr 1989 hat das Wipple‐Observatorium die erste Quelle hochenergetischer Gammastrahlung entdeckt. 2002 waren dann sechs Quellen bekannt, 2024 schon mehr als 300. Und das ist immer noch lediglich die Spitze des Eisbergs in der jungen Geschichte der Gammaastronomie.
Daniela Hadasch, Daniel Mazin
wiley +1 more source
The effects of atmosphere conditions on gamma-ray astronomy [PDF]
, 2005 The High Energetic Stereoscopic System (H.E.S.S.) experiment is an array of imaging atmospheric Cherenkov (IAC) telescopes of the next generation, with enlarged mirrors and advanced detector electronics compared to its predecessors.
Aye, Klaus-Michael
core
Geophysical Research Letters, Volume 52, Issue 22, 28 November 2025.Abstract On 9 October 2022, a powerful gamma ray burst (GRB), GRB221009A, caused significant changes in the electron density of the lower ionosphere, as evidenced by VLF (3–30 kHz) radio wave observations. However, GRB221009A did not yield any observable signatures at the Schumann resonances (∼8, ∼14 Hz), which are also sensitive to the lower ...
M. Gołkowski +8 more
wiley +1 more source
Astronomy & AstrophysicsThe SBS 1343+537 radio galaxy has a kiloparsec-scale radio jet, and complex kiloparsec-scale morphology. Although its classification is still uncertain, in literature it is indicated as a possible Fanaroff-Riley type I (FR-I) object with extended wings ...
Casaburo Fausto +14 more
doaj +1 more source
The Fermi GBM and LAT follow-up of GW150914
EPJ Web of Conferences, 2017 As the first detection of Gravitation Wave (GW) event arising from the coalescence of two stellar-mass Black Holes (BH) was announced by LIGO, a new era for astronomy began.
Bissaldi E. +5 more
doaj +1 more source