# create an function to represent the IceCube northern track limit
# Note that the units are GeV^-1 * cm^-2 * sr^-1 * s^-1 per particle type
def northern_track(energy):
return 1.44e-18 / 2 * (energy / 1e5)**-2.2
# get the weights by passing the flux to the weighter
weights = weights = weighter.get_weights(northern_track)
# print some info about the weighting object
print(weighter.tostring(northern_track))
# create equal spaced bins in log space
bins = plt.geomspace(1e2, 1e8, 50)
# get energy of the primary cosmic-ray from `PolyplopiaPrimary`
primary_energy = weighter.get_column("PolyplopiaPrimary", "energy")
# histogram the primary energy with the weights
plt.hist(primary_energy, weights=weights, bins=bins)
# make the plot look good
plt.loglog()
plt.xlabel("Primary Energy [GeV]")
plt.ylabel("Event Rate [Hz]")
plt.xlim(bins[0], bins[-1])
plt.ylim(1e-8, 2e-6)
plt.tight_layout()
plt.show()
I3CorsikaWeight=I3CorsikaWeight)
# create the weighter object
weighter = simweights.CorsikaWeighter(fileobj)
# create an object to represent our cosmic-ray primary flux model
flux = simweights.GaisserH4a()
# get the weights by passing the flux to the weighter
weights = weights = weighter.get_weights(flux)
# print some info about the weighting object
print(weighter.tostring(flux))
# create equal spaced bins in log space
bins = plt.geomspace(3e4, 1e6, 50)
# get energy of the primary cosmic-ray from `PolyplopiaPrimary`
primary_energy = weighter.get_weight_column("energy")
# histogram the primary energy with the weights
plt.hist(primary_energy, weights=weights, bins=bins)
# make the plot look good
plt.loglog()
plt.xlabel("Primary Energy [GeV]")
plt.ylabel("Event Rate [Hz]")
plt.xlim(bins[0], bins[-1])
plt.ylim(0.1, 10)
plt.show()
dx = 1e-14
while abs(f(x)) > eps:
df = (f(x + dx / 2) - f(x - dx / 2)) / dx
if (df < 1e-12) or (df > 1e9): break
dx = -f(x) / df
x += dx
counter += 1
if counter > 1000: break
# print('Number of iterrations:', counter)
return x
V1 = 10.0 # bottom of well
epsilon = 1e-8
V = pl.geomspace(70., 10000., 10)
E = []
E0 = 27.20075187724861
for V2 in V:
E.append(E0)
E0 = newton(E0)
""" E.append(E0)
Enew = newton(E[-1])
if (Enew < 33) and (Enew > V1):
E.append(Enew)
else:
E.append(E0)
"""
pl.semilogx(V, E, label='Newton')