Dear Colleague,


       We have written up the following paper and submitted it to
Astronomy and Astrophysics for publication:


       Itoh, N., Kawana, Y., & Nozawa, S.
       "Nonrelativistic Electron-Electron Thermal Bremsstrahlung
       Gaunt Factor"


We have uploaded this paper to


       arXiv:astro-ph/0111040


       By combining with our previous papers


       Nozawa, S., Itoh, N., & Kohyama, Y.
       "Relativistic Thermal Bremsstrahlung Gaunt Factor for
       the Intracluster Plasma"
       ApJ, 507:530-557, 1998 November 10


       Itoh, N., Sakamoto, T., Kusano, S., Nozawa, S., & Kohyama, Y.
       "Relativistic Thermal Bremsstrahlung Gaunt Factor for
       the Intracluster Plasma. II. Analytic Fitting Formulae"
       ApJS, 128:125-138, 2000 May


       Itoh, N., Sakamoto, T., Kusano, S., Kawana, Y., & Nozawa, S.
       "Radiative Processes in the Intracluster Plasma"
       submitted to Astronomy and Astrophysics


you are provided with accurate thermal bremsstrahlung Gaunt factors
with accuracy better than 1 % for the temperature range


       6.0 <= log T (K) <= 8.5


We believe these Gaunt factors are ideally suited for the analysis
of the precision data taken by the Chandra X-Ray Observatory
and XMM-Newton.


       Following our tradition, we have completed a subroutine for the
calculation of the electron-electron thermal bremsstrahlung. Herewith
we are sending it to you. We would like to appreciate whatever comment
you might have on our work. You are of course most welcome to pass
this subroutine to your colleagues who would be interested in using this.


       We hope our thermal bremsstrahlung Gaunt factors will contribute to
the development of X-ray astronomy.


With my best wishes,




Naoki Itoh
Department of Physics, Sophia University
7-1, Kioi-cho, Chiyoda-ku, Tokyo 102-8554 Japan
Telephone  81 (0)3 3238 3431
Telefax      81 (0)3 3238 3341