Unveiling the nature of the 321 second modulation in RX J0806.3+1527: Near-simultaneous Chandra and very large telescope observations

1. Israel, G.L.
2. Covino, S.
3. Stella, L.
4. Mauche, C.W.
5. Campana, S.
6. Marconi, G.
7. Hummel, W.
8. Mereghetti, S.
9. Munari, U.
10. Negueruela, I.