[vsnet-alert 15287] Re: Possible HST target: BB Dor

[Josch Hambsch]

BB Dor at about mag 19.3 as of last night.
CU Vel at about mag 16.3 as of last night.

Data are submitted to AAVSO.


Regards,
Groeten,
Grüße,

Josch

www.astronomie.be/hambsch
-----Original Message----- 
From: Boris Gaensicke
Sent: Tuesday, January 15, 2013 12:16 AM
To: Gary Poyner ; Roger Pickard ; David Boyd ; Mike Simonsen ; Arne Henden ; 
Arto Oksanen ; Bart Staels ; vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp ; 
Stuart P Littlefair ; Rod Stubbings
Subject: [vsnet-alert 15282] Possible HST target: BB Dor

Dear All,

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...

Best wishes,

Boris

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