3D Atmospheric Neutrino Fluxes
Details of the calulcation are described in astro-ph/0403630
Details of the format of the files (the same for each version) are given below.
Note the difference in naming convention between the versions: ('sou' is
used for Soudan, rather than 'min' for MINOS. This is to allow us to
use 'min' and 'max to refer to solar minimum/maximum.)
File format description
The files are the results of the atmospheric neutrino flux
calculation performed at Bartol and Oxford during 2002/3. It will be
published shortly as G. Barr, T.K. Gaisser, P. Lipari,
S. Robbins and T. Stanev. This is a three dimensional
calculation using the TARGET2.1 generator (see Gaisser et al ICRC
Hamburg) and the same primary cosmic ray fluxes as the 1D calculation
(Agrawal et al (1996)). Bending of secondaries in the magnetic field
of the earth is included in this calculation.
Fluxes are dN/d(logE) given in units of /m**2/steradian/sec.
(logE means natural logarithm). They are
given in neutrino energy bins and (using separate tables) in either
cos(zenith) bins or azimuth angle bins. For the time being, we are
supplying two sets of tables, one with 10 bins per decade in log(E) and
the other with 20 bins per decade. Please comment on which of these
is more suitable or if we can change to a different set of bins to make
incorporation into your experiment analysis easier.
(note that to compare the 20 bin per decade files to that of the FLUKA group,
there is an additional /GeV in the units of the Fluka group files - multiply
their data by the energy in GeV to be equivalent)
The files all have the same format. After the initial comment lines
(starting with a # character), the files contain one line
per bin. No smoothoing between bins has been done. The columns are
- Energy at centre of bin in GeV
- Zenith files: Cos(zenith) at the centre of the bin
Azimuth files: Azimuth at centre of bin (degrees)
- Flux dN/dlogE in /m**2/steradian/sec
- MC statistical error on the flux
- Number of unweighted events entering in the bin (not too useful)
The format specifier used to write the files is (1X,2F10.3,2G20.8,I10)
E-mail (replace spaces by dots) g barr1(at)physics ox ac uk