Proc. Neutrino Astrophysics - MPP Theory Group

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(a.u)
0.5
0.4
0.3
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0.1
0
0 1000 2000 3000 4000
Photon arrival times (ns)
(a.u)
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
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0 1000 2000 3000 4000
Photon arrival times (ns)
Figure 2: Ice properties measured at 1000 and 2000 m depth. The figures show the distributions
of photon arrival times relative to a laser source, measured with PMTs at 20 m (left)
and 40 m (right) distance to the source. Scattering due to residual air bubbles leads to a significant
increase of the photon propagation time (and a broadening of the spectrum). This is
a strong effect for AMANDA-A depths. It is much smaller at depths of 2 km (AMANDA-B).
number of events
10 4
10 3
10 2
10
1
10 4
10 3
10 2
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1
10 4
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1
-1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1
cos(zenith)
Figure 3: Background rejection and search for ν candidates (see text).
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9
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14
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2
1
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