1.   An American is aboard the Russian station as a guest researcher.

2.   Aboard Mir are commander Yuri Gidzenko and flight engineer Sergei Avdeyev, both Russian cosmonauts, and guest researcher Thomas Reiter of Germany, a European Space Agency astronaut.

3.   He retired three years ago but continued his work at the centers as a guest researcher until last year.

4.   The Brookhaven National Laboratory in Upton, N.Y., said that it lost both a physicist and a guest researcher in the crash.

5.   The change means he will be more than a guest researcher assisting with mundane maintenance chores.

6.   The Columbia crew consists of Ken Bowersox, Kent Rominger, Michael Lopez-Alegria, Kathy Thornton, Catherine Coleman and guest researchers Fred Leslie and Albert Sacco.

7.   He also was a guest researcher at the Brookhaven laboratory.

8.   Spanne, from Sweden was also a guest researcher at the Brookhaven laboratory.