W B Focke
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Explore the profile of W B Focke including associated specialties, affiliations and a list of published articles.
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Articles
24
Citations
59
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Recent Articles
1.
Barbiellini G, Bastieri D, Bechtol K, Bellazzini R, Blandford R, Borgland A, et al.
Astrophys J
. 2021 Oct;
784(2).
PMID: 34646038
Observations of occultations of bright -ray sources by the Sun may reveal predicted pair halos around blazars andor new physics, such as, e.g., hypothetical light dark matter particles-axions. We use...
2.
Ackermann M, Ajello M, Albert A, Atwood W, Baldini L, Barbiellini G, et al.
Phys Rev D
. 2020 Aug;
93(8):082001.
PMID: 32743154
We have measured the gamma-ray emission spectrum of the Moon using the data collected by the Large Area Telescope onboard the Fermi satellite during its first seven years of operation,...
3.
Abdollahi S, Ackermann M, Ajello M, Albert A, Atwood W, Baldini L, et al.
Phys Rev Lett
. 2017 Mar;
118(9):091103.
PMID: 28306280
The Large Area Telescope on board the Fermi Gamma-ray Space Telescope has collected the largest ever sample of high-energy cosmic-ray electron and positron events since the beginning of its operation....
4.
Ajello M, Albert A, Anderson B, Baldini L, Barbiellini G, Bastieri D, et al.
Phys Rev Lett
. 2016 May;
116(16):161101.
PMID: 27152783
We report on the search for spectral irregularities induced by oscillations between photons and axionlike-particles (ALPs) in the γ-ray spectrum of NGC 1275, the central galaxy of the Perseus cluster....
5.
Ackermann M, Albert A, Anderson B, Atwood W, Baldini L, Barbiellini G, et al.
Phys Rev Lett
. 2015 Dec;
115(23):231301.
PMID: 26684107
The dwarf spheroidal satellite galaxies (dSphs) of the Milky Way are some of the most dark matter (DM) dominated objects known. We report on γ-ray observations of Milky Way dSphs...
6.
Ackermann M, Ajello M, Albert A, Allafort A, Baldini L, Barbiellini G, et al.
Phys Rev Lett
. 2014 May;
112(15):151103.
PMID: 24785023
Recent accurate measurements of cosmic-ray (CR) species by ATIC-2, CREAM, and PAMELA reveal an unexpected hardening in the proton and He spectra above a few hundred GeV, a gradual softening...
7.
Ackermann M, Ajello M, Asano K, Atwood W, Axelsson M, Baldini L, et al.
Science
. 2013 Nov;
343(6166):42-7.
PMID: 24263133
The observations of the exceptionally bright gamma-ray burst (GRB) 130427A by the Large Area Telescope aboard the Fermi Gamma-ray Space Telescope provide constraints on the nature of these unique astrophysical...
8.
Ackermann M, Ajello M, Allafort A, Schady P, Baldini L, Ballet J, et al.
Science
. 2012 Nov;
338(6111):1190-2.
PMID: 23118013
The light emitted by stars and accreting compact objects through the history of the universe is encoded in the intensity of the extragalactic background light (EBL). Knowledge of the EBL...
9.
Measurement of separate cosmic-ray electron and positron spectra with the fermi large area telescope
Ackermann M, Ajello M, Allafort A, Atwood W, Baldini L, Barbiellini G, et al.
Phys Rev Lett
. 2012 Feb;
108(1):011103.
PMID: 22304252
We measured separate cosmic-ray electron and positron spectra with the Fermi Large Area Telescope. Because the instrument does not have an onboard magnet, we distinguish the two species by exploiting...
10.
Fermi LAT Collaboration , Ackermann M, Ajello M, Ballet J, Barbiellini G, Bastieri D, et al.
Science
. 2012 Jan;
335(6065):189-93.
PMID: 22246769
Gamma-ray binaries are stellar systems containing a neutron star or black hole, with gamma-ray emission produced by an interaction between the components. These systems are rare, even though binary evolution...