(cba:news) Re: stars new and old (fwd)

[Joe Patterson]

I guess you all got Berto's note...

Hi CBA observers,

I can't help but notice that after the EC 0556-59 debacle (although
nobody could have foreseen this), Joe is now turned hesitant to select
another deep Southern target ;-).

Yeah. Well, I went for EC10560-2902... but farther south than that, I'm
spooked.  What happened with EC0556-59, anyway?  Is there a problem with
the identification?  Brian/Patrick/Darragh, can you look at the Downes et
al. chart and see if the wrong star is marked?  (I'm puzzled because the
Chen et al. MNRAS paper showed the usual CV flickering, and we don't see
any.  The star's too far south for me to check.)

Berto's choice for BG CMi comp is a good one, easy to find since it's the
star 17" directly N from BG CMi.  Just make sure you don't saturate on it.
At B-V=0.7 it's a decent color, not horrendously different from the CV.
(We really love the blue guys, but the sky has precious few of 'em.)

joe


The new (equatorial) target-select has a fine sequence in the Loneos
list which looks as follows:

BG CMi 8            7 31 18.4   +09 57 54   h 0768-1581  14.69   0.51

BG CMi 7            7 31 21.0   +09 57 55   h 0768-1906  14.11   0.43

BG CMi 9            7 31 21.8   +09 57 20   h            14.43   0.85

BG CMi 10           7 31 24.3   +09 54 13   h 0768-1913  13.63   0.50

BG CMi 4            7 31 25.6   +09 56 38   h 0768-0553  12.97   0.57

BG CMi 5            7 31 29.2   +09 56 39   h 0768-1846  12.46   0.71

BG CMi 2            7 31 33.7   +09 55 35   h 0768-0833  12.63   1.17

BG CMi 3            7 31 34.2   +09 57 33   h 0768-1017  13.47   0.47

BG CMi 12           7 31 34.5   +09 54 22   h            14.42   0.79


I would propose star No 5 (alt No 4) as a nearby and adequate C
candidate (if it is indeed constant). For unfiltered observations it
will shine at 12.05R (alt 12.63R).

No listed star is faint enough to be used as a proper K. Possibly stars
7 and 9 come closest with 13.85R and 13.95R respectively.

But where are stars 1 and 11 then?

Regards and I hope your weather is better than mine,

Berto  Monard
CBA Pretoria


joe