CEA Saclay – Institute of research into the fundamental laws of the Universe
Antares
Selected results
Th. Stolarczyk for the Antares collaboration
CEA Irfu Saclay Particle Physics Division
December 16th, 2010
http://antares.in2p3.fr
Antares, selected results
Galactic
Extra-galactic GRB
Supernova remnants
Pulsars
Microquasars AGN
TPC 2010, Paris - 16 december 2010
Th. Stolarczyk - CEA Irfu
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Antares, selected results
Galactic
Extra-galactic GRB
Supernova remnants
e + g e + gHE (inverse Compton) Pulsars
Microquasars
p/A + p/g p0 + p + ... gHE gHE nm m nm ne e
TPC 2010, Paris - 16 december 2010
Th. Stolarczyk - CEA Irfu
AGN
3
Antares, selected results
Atmospheric neutrinos 3000 per year
Cosmic ray
Atmospheric muons
10 millions per year
TPC 2010, Paris - 16 december 2010
Th. Stolarczyk - CEA Irfu
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Antares, selected results
Expected angular resolution mrec - mtrue mrec -n m n
TPC 2010, Paris - 16 december 2010
Th. Stolarczyk - CEA Irfu
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Antares, selected results
The Antares collaboration
TPC 2010, Paris - 16 december 2010
Since1996
7 countries
22 labs
~150 scientists and engineers
Th. Stolarczyk - CEA Irfu
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Antares, selected results
20 Mton instrumented volume
350 m 450 m
100 m -2500 m
60 m
TPC 2010, Paris - 16 december 2010
12 lines 3x25 PM Th. Stolarczyk - CEA Irfu
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Antares, selected results
TPC 2010, Paris - 16 december 2010
Th. Stolarczyk - CEA Irfu
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Antares, selected results
Detection storey Optical beacon
Time calibration DAQ Slow Control Compass cards PMT 10” (sTTS 1.3 ns) Sphere 17”
Hydrophone
Acoustic positioning TPC 2010, Paris - 16 december 2010
Titanium structure Th. Stolarczyk - CEA Irfu
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Antares, selected results
Signal Muon 2 µs long signal 100 hits (Increases with E)
40K
30 kHz* continuous
Bioluminescence
decay
30 kHz* continuous Bursts > MHz
« all data to shore »
Several triggers implemented
Simulation
*PM 10 ’’, threshold at 0,3 p.e. TPC 2010, Paris - 16 december 2010
Th. Stolarczyk - CEA Irfu
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Antares, selected results
History
MILOM
Line 1
TPC 2010, Paris - 16 december 2010
1+2
5 lines
10 lines + IL07
12 lines, installation completed
Th. Stolarczyk - CEA Irfu
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Antares, selected results
Atmospheric muons
2.5km
6km
90 effective days, 107 muon triggers.
→ Astropart. Phys. 34(2010) 179-184 TPC 2010, Paris - 16 december 2010
Th. Stolarczyk - CEA Irfu
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Antares, selected results
Neutrinos
Upgoing sample TPC 2010, Paris - 16 december 2010
Th. Stolarczyk - CEA Irfu
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Antares, selected results
Log(dN/dE)
Diffuse flux search 10 + 12 lines data
E-3.7
(2007/12 – 2009/12) cut E3 x dn/dEatm
n atm
E-2
Log(E) TPC 2010, Paris - 16 december 2010
Th. Stolarczyk - CEA Irfu
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Antares, selected results
Diffuse flux search Energy discrimination (hit repetition)
R=
𝒊 𝑵𝒖𝒎𝒃𝒆𝒓 𝒐𝒇 𝒉𝒊𝒕𝒔 𝒊𝒏 𝑷𝑴𝑻𝒊
𝑻𝒐𝒕𝒂𝒍 𝒏𝒖𝒎𝒃𝒆𝒓 𝒐𝒇 𝑷𝑴𝑻𝒔 𝒄𝒐𝒏𝒕𝒓𝒊𝒃𝒖𝒕𝒊𝒏𝒈 𝒕𝒐 𝒕𝒉𝒆 𝒆𝒗𝒆𝒏𝒕
Monte Carlo Normalised to Carlo data Monte Example flux
10-7 GeV cm-2 s-1 sr-1
Exp.11± 2 background events 9 found in data TPC 2010, Paris - 16 december 2010
Th. Stolarczyk - CEA Irfu
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Antares, selected results
Diffuse flux search 𝑬𝟐𝝓𝟗𝟎% = 𝟓. 𝟑 × 𝟏𝟎−𝟖 𝐆𝐞𝐕 𝐜𝐦−𝟐 𝐬 −𝟏 𝐬𝐫 −𝟏
20 TeV
2.5 PeV
To be published in Physics Letter B [arXiv:1011.3772] TPC 2010, Paris - 16 december 2010
Th. Stolarczyk - CEA Irfu
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Antares, selected results
Point-like source search
Data
2007–2008 (295 d) 7.6 106 triggers
Prior Selection
Upgoing (4.2 106 triggers) Angular error β ≤ 1°
(eff to signal 95%, backgr. rejection 74%)
Unbinned search optimisation
From MC
→ Quality parameter Λ < -5.4 → 2040 events
1093 neutrinos
purity 60%
(E-2 signal)
Resol. 0.5°
TPC 2010, Paris - 16 december 2010
Th. Stolarczyk - CEA Irfu
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Antares, selected results
Point-like source search
TPC 2010, Paris - 16 december 2010
Th. Stolarczyk - CEA Irfu
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Antares, selected results
Point-like source search All sky search + 24 candidate list
TPC 2010, Paris - 16 december 2010
Th. Stolarczyk - CEA Irfu
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Antares, selected results
Conclusion
Installation completed in may 2008
Continuous operation and maintenance Unique real time infrastructure for environmental research
Physics
Downgoing muon flux under control First limit on diffuse flux (2008-2009 data) First preliminary results on sources (2007-2008 data)
More to come
GRB and transient sources Dark matter Neutrino oscillation (checks) Exotic physics (monopole etc.)
Future
Many years of data taking still KM3neT: Prototype in preparation (early 2012)
TPC 2010, Paris - 16 december 2010
www.km3net.org
Th. Stolarczyk - CEA Irfu
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Antares, selected results
TPC 2010, Paris - 16 december 2010
Th. Stolarczyk - CEA Irfu
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Antares, selected results
Atmospheric muons
5 line data Astropart. Phys. 34(2010) 179184
TPC 2010, Paris - 16 december 2010
Th. Stolarczyk - CEA Irfu
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Antares, selected results
Bioluminescence
2 min TPC 2010, Paris - 16 december 2010
Th. Stolarczyk - CEA Irfu
24
Antares, selected results
IL 07 hydrophones
CT 14.5m
Camera OM
SV
hydrophones
ADCP 80m C-Star CT 14.5m O2 14.5m
hydrophones
C-Star
Other sciences Seismology Acoustics Oceanography Climatology Zoology …
80m Camera OM hydrophone
ADCP 98m RxTx
Seismometer
TPC 2010, Paris - 16 december 2010
Th. Stolarczyk - CEA Irfu
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Antares, selected results
Trigger statistics 2007, 5 lines : 19106
2008, 10 lines : 65106 Cable failure
TPC 2010, Paris - 16 december 2010
Th. Stolarczyk - CEA Irfu
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Antares, selected results
Neutrino as a messenger g n p
g
< 2 109 Ly < 30 106 Ly < 30 000 Ly
TPC 2010, Paris - 16 december 2010
at 1 TeV at 100 TeV At 1 PeV
Local cluster Galaxy Th. Stolarczyk - CEA Irfu
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