BB Dor observations requested tonight
Dr. Boris Gaensicke is requesting observations tonight and over the next few nights of the SW Sex variable BB Dor. He writes: "it appears that the SW Sex star BB Dor is in a deep low state, and that would make it a very interesting target for HST ultraviolet observations: during the normal high state, it is impossible to see the white dwarf in the system, as it is shielded by the accretion disk - however, in a low state, there is a good probability that most of the disk is gone...
"If you have a chance, could you get a few more observations of BB Dor to see how stable it is settled at V~19? If it looks fast asleep, we would proceed with planning the HST observations..."
Please see AAVSO Special Notice #323 for coordinates and other information.
Good observing! Elizabeth Waagen