| Affiliation: |
| AA(South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South Africa), AB(South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South Africa), AC(South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South Africa), AD(South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South Africa), AE(South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South Africa), AF(South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South Africa), AG(South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South Africa), AH(South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South Africa), AI(South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South Africa), AJ(Mullard Space Science Laboratory, University College London, Holmbury St Mary, Dorking, Surrey RH5 6NT; NASA Ames Research Center, Moffett Field, CA 94035, USA), AK(Department of Physics and Astronomy, The Open University, Walton Hall, Milton Keynes MK7 6AA; Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH), AL(Department of Physics and Astronomy, The Open University, Walton Hall, Milton Keynes MK7 6AA), AM(CRESST and X-ray Astrophysics Laboratory NASA/GSFC, Greenbelt, MD 20771, USA; Department of Physics, University of Maryland, Baltimore county, 1000 Hilltop Circle, Baltimore, MD 21250, USA) |