ZEU-EXP/AT

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2018-10-08
10:57
OpenAccess [PUBDB-2018-03719] Journal Article
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Measurement of cosmic-ray electrons at TeV energies by VERITAS
Cosmic-ray electrons and positrons (CREs) at GeV-TeV energies are a unique probe of our local Galactic neighborhood. CREs lose energy rapidly via synchrotron radiation and inverse-Compton scattering processes while propagating within the Galaxy, and these losses limit their propagation distance [...]
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2018-10-08
10:49
[PUBDB-2018-03718] Journal Article
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DES science portal: Computing photometric redshifts
A significant challenge facing photometric surveys for cosmological purposes is the need to produce reliable redshift estimates. The estimation of photometric redshifts (photo-s) has been consolidated as the standard strategy to bypass the high production costs and incompleteness of spectroscopic redshift samples. [...]
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2018-10-08
10:30
arXiv [PUBDB-2018-03717] Report/Journal Article
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Detection of the blazar S4 0954+65 at very-high-energy with the MAGIC telescopes during an exceptionally high optical state
[arXiv:1801.04138]
ims.The very high energy (VHE&100GeV)γ-ray MAGIC observations of the blazar S4 0954+65, were triggered by anexceptionally high flux state of emission in the optical. This blazar has a disputed redshift ofz= 0.368 orz>0.45 and an uncertainclassification among blazar subclasses. [...]
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2018-10-08
10:19
[PUBDB-2018-03716] Journal Article
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Constraining very-high-energy and optical emission from FRB 121102 with the MAGIC telescopes
Fast radio bursts (FRBs) are bright flashes observed typically at GHz frequencies with millisecond duration, whose origin is likely extragalactic. Their nature remains mysterious, motivating searches for counterparts at other wavelengths. [...]
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2018-09-11
11:24
[PUBDB-2018-03435] Journal Article
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Constraining dark matter lifetime with a deep gamma-ray survey of the Perseus galaxy cluster with MAGIC
Clusters of galaxies are the largest known gravitationally bound structures in the Universe, with masses around $10^{15}M_{\odot}$, most of it in the form of dark matter. The ground-based Imaging Atmospheric Cherenkov Telescope MAGIC made a deep survey of the Perseus cluster of galaxies using almost 400 h of data recorded between 2009 and 2017 [...]
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2018-08-27
16:44
OpenAccess [PUBDB-2018-03205] Journal Article
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Investigating the Nature of Late-time High-energy GRB Emission through Joint Fermi / Swift Observations
We use joint observations by the Swift X-ray Telescope (XRT) and the Fermi Large Area Telescope (LAT) of gamma-ray burst (GRB) afterglows to investigate the nature of the long-lived high-energy emission observed by Fermi LAT. Joint broadband spectral modeling of XRT and LAT data reveals that LAT nondetections of bright X-ray afterglows are consistent with a cooling break in the inferred electron synchrotron spectrum below the LAT and/or XRT energy ranges [...]
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2018-08-27
16:36
[PUBDB-2018-03204] Journal Article
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TAIGA Gamma Observatory: Status and Prospects
Over the past few years, the TAIGA (Tunka Advanced Instrument for cosmic ray physics and Gamma-ray Astronomy) observatory has been being deployed in the Tunka Valley, Republic of Buryatia. It is designed for studying gamma rays of energy above 30 TeV and performing searches for sources of galactic cosmic rays with energies in the vicinity of 1 PeV, which is an energy region around the classic knee in the cosmic-ray energy spectrum. [...]
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2018-08-27
16:29
[PUBDB-2018-03203] Journal Article
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The Search for Spatial Extension in High-latitude Sources Detected by the Fermi Large Area Telescope
We present a search for spatial extension in high-latitude ($| b| \gt 5^\circ $) sources in recent Fermi point source catalogs. The result is the Fermi High-Latitude Extended Sources Catalog, which provides source extensions (or upper limits thereof) and likelihood profiles for a suite of tested source morphologies [...]
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2018-08-27
16:20
[PUBDB-2018-03202] Journal Article
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Gamma-ray flaring activity of NGC 1275 in 2016-2017 measured by MAGIC
We report on the detection of flaring activity from the Fanaroff-Riley I radio galaxy NGC 1275 in very-high-energy (VHE, E $>$ 100 GeV) gamma rays with the MAGIC telescopes. Observations were performed between 2016 September and 2017 February as part of a monitoring program. [...]
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2018-08-27
14:47
OpenAccess [PUBDB-2018-03196] Journal Article
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Correcting for peculiar velocities of Type Ia supernovae in clusters of galaxies
Context. Type Ia supernovae (SNe Ia) are widely used to measure the expansion of the Universe [...]
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