MS Comments on abstract following the indico numbering). Red: text added; blue: text displaced
1. ANTARES constraints on the high energy neutrino flux from the Galactic Plane
The measurements of astrophysical neutrinos by the IceCube collaboration are consistent with an
isotropic flux but also contain some indications of a North/South asymmetry which could hint a
Galactic contribution. The ANTARES neutrino telescope has a direct view of the Galactic Center
region and can provide complementary information on the neutrino flux from this region thanks to
its excellent angular resolution both for tracks and showers.
A recent model of cosmic-ray transport in the Galactic Plane, KRAγ, is characterized by radiallydependent cosmic-ray transport properties. It is designed to reproduce Fermi-LAT γ-ray data, and is
consistent with MILAGRO and HESS measurements of the Galactic Ridge.
The neutrino flux from the Galactic Center predicted by this model is about five times larger than the
flux computed with previous models, and it is close to the ANTARES sensitivity.
Using the model KRAγ as a reference, we searched for a possible Galactic contribution to the
astrophysical neutrino flux using nine years of data from the ANTARES neutrino telescope.
Interactions of all neutrino flavors yielding tracks or cascades are used. No excess of events is
observed and an upper limit is set on the neutrino flux of 1.3 times the prediction of the KRAγ
model.
2. All-flavor Neutrino Point-like Source Search with the ANTARES Neutrino Telescope
Line 17: 2.1 x 10-8 (too many digits)
3. Search for time correlations between ANTARES neutrino candidates and
IceCube/High-Energy Starting Events
We present a search for ANTARES neutrino events in spatial and temporal coincidence
with IceCube High-Energy Starting Events (HESE). This analysis, extended to the full
visible sky of ANTARES, uses a maximum likelihood ratio approach. All neutrino flavors
yielding track or cascade events are observed. Each HESE direction is treated as
potential transient neutrino source direction while the neutrino burst duration and the
number of ANTARES signal events are obtained as those maximizing the likelihood.
Before applying the method to the unblinded ANTARES dataset, its sensitivity and
discovery potential are computed through dedicated pseudo-experiments. This study
provides an effective way to acquire information on the possible origin of the IceCube
astrophysical signal from transient sources.
4. Search for signal emission from AGN populations with the
ANTARES neutrino telescope.
Rodrigo G. Ruiz
We use a two point correlation analysis to look for inhomogeneities in the arrival
directions of the high energy muon neutrino candidates detected by the ANTARES
neutrino telescope. This approach is complementary to a point source likelihoodbased search, which is mainly sensitive to one bright point like source and not to
collective effects. We present the results of a search based on this two-point
correlation method performed on ANTARES data, providing constraints on models of
a population of Active Galactic Nuclei (AGN) too faint to be detected by the
likelihood-based method.
5. Missing
6. Search for neutrino emission from the Fermi Bubbles with the ANTARES
telescope
The Fermi Bubbles are giant lobe-shaped structures of γ-ray emission extending above and
below the Galactic Center. A variety of both hadronic and leptonic models has been proposed
to explain the emission, yet its origin remains unclear. Only in hadronic scenarios, the γ-ray
flux is accompanied by an associated neutrino flux that might be detected with large volume
neutrino detectors.
ANTARES is the largest neutrino telescope in the Northern Hemisphere and has been
operated in its final configuration since 2008. Its location in the Mediterranean sea provides
an excellent view towards the Fermi Bubbles’ region.
In a previous analysis ANTARES has observed a nonsignificant excess of neutrinos in the
Fermi Bubble region using It concentrated on charged current interactions of νμ. For these
events, the outgoing muon produces an elongated track-like signature that can be
reconstructed with sub-degree angular resolution. More recently, improved shower
reconstruction algorithms in ANTARES achieve a precision of ~3° also for signatures
produced in νe, ντ and neutral current interactions. This contribution presents the search for
shower-like events from the Fermi Bubbles in ANTARES data. In combination with the
previous analysis, upper limits on the all-flavour neutrino emission from the region are
derived.
7. Search for a diffuse flux of cosmic neutrinos with the ANTARES telescope
The ANTARES detector is the largest and longest operated neutrino telescope in the
Northern Hemisphere. All-flavour neutrino interactions can be observed and reconstructed
with high precision by the experiment. The track channel – CC muon neutrino induced events
– allows to increase the effective detector volume by the long path travelled by muons in rock
and sea-water, with excellent angular resolution but limited energy reconstruction precision.
The shower channel – all neutrino flavours NC and e, CC interactions– allows to reach a
much better energy resolution, though it can be used only for events within a limited fiducial
volume. The highly significant cosmic neutrino excess observed by the Antarctic IceCube
detector can be studied with ANTARES exploiting the complementarity of its field of view
and its reconstruction performance. Searches for all-sky diffuse neutrino signals have been
conducted using the available ANTARES data set. The results of these searches will be
reported in this contribution.
8. add “neutrino”in the title ; remove “set” after “data”
9. Missing
10. Time-dependant search of neutrino emission from X-ray and gamma-ray binaries
using eight years of data of the ANTARES telescope
Sanchèz-Losa A., Dornic D., Coleiro A. on behalf the ANTARES Collaboration
ANTARES is currently the largest neutrino telescope operating in the Northern Hemisphere,
aiming at the detection of high-energy neutrinos from astrophysical sources. Such
observations would provide important clues about the processes at work in those objects
sources, and possibly help to understand the sources origin of very high-energy cosmic rays.
By design, neutrino telescopes constantly monitor at least one complete hemisphere of the
sky and are thus well set to detect neutrinos produced in transient astrophysical events
sources. The flux of high-energy neutrinos from transient sources is expected to be lower
than the one expected from steady ones sources, but the background originating from
interactions of charged cosmic rays in the Earth’s atmosphere can be drastically reduced by
requiring a directional and temporal coincidence of the astrophysical phenomenon detected
by a satellite. Time-dependent point-source searches have been applied to a list of x-ray and
gamma-ray binary systems detected by satellites such as Swift, Fermi or IACT using eight
years of ANTARES data. The results of these searches are presented together with the
comparison between the neutrino (?)flux upper-limits with the measured gamma-ray spectral
energy distribution and the prediction from astrophysical models.
Question: eight year because 2008-2015? Other papers “9 years”
11. Time-dependent search of neutrino emission from bright gamma-ray flaring blazars
using eight years of data of the ANTARES telescope
Sanchèz-Losa A., Dornic D. on behalf the ANTARES Collaboration
The ANTARES telescope is well suited for detecting astrophysical transient neutrino sources
as it can observe a full hemisphere of the sky at all times with a high duty cycle. The
background due to atmospheric particles can be drastically reduced, and the point-source
sensitivity improved, by selecting a narrow time window around possible neutrino production
periods. Blazars, being radio-loud active galactic nuclei with their jets pointing almost
directly towards the observer, are particularly attractive potential neutrino point sources,
since they are among the most likely sources of the very high-energy cosmic rays. Neutrinos
and gamma rays may be produced in hadronic interactions with the surrounding medium.
Moreover, blazars generally show high time variability in their light curves at different
wavelengths and on various time scales.
A time-dependent analysis has been applied to a selection of flaring gamma-ray blazars
observed by the FERMI/LAT experiment and by TeV Imaging Cherenkov telescopes using
eight years of ANTARES data taken from 2008 to 2015. The results of these searches are
presented together with the comparison between the neutrino �flux upper-limits with the
measured gamma-ray spectral energy distribution and the prediction from astrophysical
models.
12. Search for a high-energy neutrino signal from Fast Radio Bursts with the
ANTARES neutrino telescope
Turpin D., Dornic D. on behalf the ANTARES Collaboration
Fast Radio Bursts (FRBs) are one of the most intriguing transient radio sources
discovered for the first time a decade ago. They are characterized by an intense
radio pulse pulse of radio light (few Jy) lasting few milliseconds and mainly detected
in the GHz energy band. Up to now, many unknowns remain concerning the nature
of the transient progenitor, the nature of the radio emission and their distribution in
the Universe. Recently, the first evidence on the association between the repeating
burst FRB121102 and a star-forming dwarf galaxy located at the cosmological
distance z = 0.19 was reported. These observations imply that at least some of the
FRBs indeed originate from the distant Universe and have to be associated with
extremely violent events to explain their observed brightness. So far, the radiative
processes powering the radio emission are unknown but efficient particle
acceleration may occur in the vicinity of the progenitor. A multi-wavelength and a
multi-messenger approach are therefore crucial to identify the nature of these
acceleration mechanisms. In this context, a search for a high-energy neutrino signal
from the most recent radio bursts has been performed with the ANTARES neutrino
telescope. By design, ANTARES mainly observes the Southern sky (2π steradian at
any time) and is perfectly suited to search for a neutrino signal from transients that
have been mainly detected at the Parkes observatory in Australia. In this
contribution, we will present the results of our neutrino searches using the ANTARES
detector and their implications for hadronic emission in such bursts.
13. Multi-wavelength follow-up observations of ANTARES neutrino alerts
High-energy neutrinos could be produced in the interaction of charged cosmic rays with
matter or radiation surrounding astrophysical sources. Transient phenomena, such as gammaray bursts, core-collapse supernovae or active galactic nuclei are promising candidates to
emit high-energy neutrinos. To search for coincidences between a transient event and a
neutrino emission, a follow-up program of neutrino alerts has operated within the ANTARES
Collaboration since 2009. This program triggers a network of robotic optical telescopes
immediately after the detection of a neutrino event and schedule several observations in the
following weeks. The most interesting neutrino candidates are also followed by the Swift
XRT telescope and the Murchison Widefield Array (MWA) radio telescope and the H.E.S.S.
high-energy gamma-ray telescope. By combining the information provided by the
ANTARES neutrino telescope with information coming from other observatories, the
probability of detecting a source is enhanced, allowing the possibility of identifying a
neutrino progenitor from a single detected event. No optical counterpart associated with a
neutrino emission has been identified during image analysis
14. Correlation between ANTARES high-energy neutrino
candidates and Auger/TA UHECRs -------------------We are searching for astrophysical correlations with both
ANTARES cosmic neutrino events and Ultra High Energy Cosmic
Rays (UHECRs) coming from the Pierre Auger Observatory and the
Telescope Array. In order to test the correlation we have used
the so-called $\delta\chi^2$ method, which is an invariant
statistic constructed from the angle between two unit vectors
corresponding to the directions of the neutrino events and
UHECRs, and weighted by the angular resolutions of the UHECR
events.
To evaluate the significance of any correlation we used Monte
Carlo simulations of randomly generated UHECR directions and
comparing with data.
------------------------------15. Multi-messenger real-time analyses of transient events with the ANTARES
neutrino telescope
By constantly monitoring at least one complete hemisphere of the sky, neutrino
telescopes are well designed to detect neutrinos emitted by transient astrophysical
events. Real-time searches for ANTARES neutrino candidates coincident with gammaray bursts, High-Energy Starting Events and Extremely High-Energy Events detected by
IceCube and gravitational wave (GW) candidates observed by LIGO/Virgo are
performed. By requiring coincident detection, this approach increases the sensitivity of
the telescope and the significance of a potential discovery. The latest results of these
analyses will be presented. In particular, a neutrino follow-up is performed after the
detection of GW events by the LIGO/Virgo collaboration. Since no coincident ANTARES
event has been detected, the neutrino fluence and the total energy emitted in neutrinos
are constrained for each GW alert. Because of the better angular accuracy of neutrino
telescopes compared to current GW detectors with two interferometers, a coincident
detection would drastically constrain the position of the GW source on the sky, bringing
valuable information for subsequent electromagnetic follow-ups.
16. Missing text
17. Atmospheric neutrino oscillation parameters measured by the ANTARES neutrino
telescope
-line 1 : constraint measurement. Line 7: change “which is still sufficiently …”
18. New results from the search Indirect searches for dark matter with the
ANTARES neutrino telescope
One of the mayor purposes of the ANTARES neutrino telescope is the indirect
search for dark matter. The ANTARES detector is located on the bottom of
the Mediterranean Sea 40 km off the southern French coast. and has been
taking data since 2007. In this talk the results of the search for dark
matter signals from the Sun, the Galactic Center and the Earth core and
other celestial objects, produced with different analysis methods, will be
presented. There are various advantages in indirect searches with neutrino
telescopes and the limits presented for the Galactic Center in particular
are the most stringent of all indirect detection experiments for WIMP
masses above 30 TeV. (Comment on the spin-dependent from the Sun? From the
Earth?)
19. ANTARES/IceCube combined search for DM ? Not found
20.
Cosmic background from the Sun
(Title??
Neutrino telescopes have been proposed as good tools for indirect detection of dark matter
searches, especially using the Sun as source for its good capability to capture dark matter and since
we do not expect high-energy neutrinos from it. However, the last statement should be taken with
caution because high-energy neutrinos may come from cosmic particles interacting in the
atmosphere of the Sun and producing neutrinos. In this work, we describe an analysis of the
ANTARES neutrino telescope optimised for the observation of neutrinos coming from the
atmosphere of the Sun due to cosmic particles interactions. Focusing in the 100 GeV - 10 TeV region
and using 2007-2012 data, the sensitivity obtained is approximately 10 10 km2 y-1, whereas the flux
expected is two order of magnitudes below. From this, we can conclude that present high-energy
neutrino telescopes dark matter searches in the Sun can effectively neglect this contribution, but
could play a role in future detectors with better neutrino flux sensitivities in the 10 GeV- 10 TeV
region and very good angular resolution.
21. Update of the Search for 𝛽≥0.6 magnetic monopoles search with the
ANTARES neutrino telescope
New results on The search for magnetic monopoles with the ANTARES neutrino telescope are
presented. These hypothetical particles carry only a magnetic charge. They would be created in the
primordial Universe within the phase transition corresponding to the spontaneous breaking of the
unified gauge group into subgroups, then would be accelerated by the Galactic magnetic fields and
reach the Earth. Magnetic monopoles could be detected as highly ionizing particles in neutrino
telescopes. This new analysis uses a total live time of 1121 days of the ANTARES detector. No signal
above the background expectation from atmospheric muons and neutrinos is observed, and new
90% C.L. upper limits are set on the magnetic monopole flux in the range of velocities 𝛽=𝑣𝑐 ≥0.6
and masses (mass range from the paper)….
22. Nuclearites search with the ANTARES detector
Strange quark matter (SQM), consisting of roughly equal quantities of u, d and s
quarks, was suggested to be the ground state of hadronic matter. SQM could be stable
for baryon numbers A ranging from a few (ordinary nuclei) to 1057 (neutron stars).
Lumps of SQM may have survived as relics of the Big Bang or as debris of
supernovae and may contribute to the cold dark matter content in the Universe.
Massive lumps of SQM, named nuclearites, may be present in the cosmic radiation
and reach the Earth with non-relativistic velocities (𝛽~10-3 ). Nuclearites moving
slowly through water would produce a thermal shock wave, emitting blackbody
radiation and yielding a large amount of visible light. The ANTARES neutrino
telescope, currently operating in the Mediterranean Sea, is sensitive to the signal of
nuclearites (𝑀! ≳ 10^14 GeV). New results on the search for downgoing nuclearites
with ANTARES will be presented, using an extended data set.
23
24. TITLE MISSING
40K is the most abundant radioactive isotope in sea water. Its Cherenkov light wavelength spectrum
is equal to the one produced by atmospheric muons which have to be detected by ANTARES; thus it
constitutes the principal source of background light. However, it 40K is as well an important
calibration tool. In ANTARES, the optical modules (OMs) are stored in groups of three (storey), and, if
a 40K decays near a storey, its Cherenkov light can be recorded by two OMs simultaneously: this is
called a genuine coincidence. There exists also a background of random coincidences, which
happens when two hits by two different 40K decays appear to be close in time. By plotting these
signals as a function of the t between the two OMs, the shape is that of a flat uniform background
due to the random coincidences plus a peak: the first one is due to the random coincidences, while
the peak is the result of the genuine ones. Fitting these distributions allows to compute the average
rate of genuine coincidences and, consequently, the OM efficiencies. The 40K coincidence rates are
used to tune the overall OM efficiency in the detailed Geant4 simulation of the OM. This simulation
provides valuable input for the global detector simulation. Using ANTARES data from 2009, when a
dedicated 40K trigger has been integrated in the standard physics run setup, to 2016, the OM
efficiencies have been determined on a 6-days basis, after applying selection cuts in order to provide
reliable time-dependent OM efficiencies for most of the individual OMs. The results show an
impressive stability over time as well as the benefit of HV tuning, which is applied regularly to keep
the OM efficiencies at their best.