[vsnet-chat 3084] Re: (fwd) Extragalactic Variables [chat] (Greaves)

[Taichi Kato <tkato>]

Re: [vsnet-chat 3077] (fwd) Extragalactic Variables [chat] (Greaves)

   Among non-LMC/SMC extragalactic variables, one of the best monitored
variables by amatuers would be Draco C-1 in the Draco dwarf galaxy.

171957.5 +575005 (2000.0) U10822V0225 ZAND 14.5 15.67 - - - C,1e C-1
171958.0 +575004 (2000.0) DracoC-1 ZAND 17.0V

   This symbiotic variable has been monitored by Tsutomu Watanabe-san
for future potential supernova explosion [he probably must live long!].

   S Dor-type stars in M31 and M33 are well within the reach of moderate
telescopes.  S Dor stars in M31 (AE And, AF And, M31 VA-1 etc) are all
faint, but M33 variables sometimes reach sufficient brightness.  The
outburst of M33 VarC some 10+ years ago was bright enough to be recorded
by amateur equipment.  M33 also has some 15th-mag isolated (non-variable?)
stars, which can be recognized visually using a moderate telescope.
The most distant extragalactic variable star (disregarding SNe and GRBs)
reaching the conventional limiting magnitude might be NGC 2403 V12 =
SN 1954J, which is possibly an eta Car-type object, reaching mag 16.5.
I don't know someone has succeeded in visually observing non-LMC/SMC
Cepheids.

Regards,
Taichi Kato

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