(cba:news) V591 Cen, OT1112-35, and OT0747

Joe Patterson jop at astro.columbia.edu
Sun Feb 3 21:22:08 EST 2008

Dear CBAers,

1112-35 (Cen) stays strong and observable; I dunno about humps now, but 
it's definitely worth continuing to follow with time series.  Also in
the south, V591 Cen is apparently back in outburst after a long rest - 
can anyone down south test it for superhumps?

On the equator, OT0747+06 appears to be done.  It had one rebrightening, 
but the humps are gone and I doubt they'll be coming back.  I think it's 
time to usher it off the stage.

Here's the vsnet message on V591 Cen:

-------- Original Message --------
Subject: [vsnet-alert 9878] Re: V591 Cen outburst

    Forwarded message from Rod Stubbings (thank you for your clarification!
-- I must have missed this message).

    This object was discovered by Huruhata, renowned for the discovery
of EG Cnc.  The V591 Cen discovery article wrote:


   "Only one maximum has been observed.  Positive observations
are as follows"

2428628 16.0
      31 14.1
      33 14.2
      37 14.5
      38 14.8
      40 14.9
      68 15.8

(If the mags 15.8-16.0 represent combined mags, the rest of the data
strongly suggest a superoutburst.  Time-resolved photometry during
the current outburst is very strongly requested).


V591 Cen:
Correct position of V591 Cen from Berto Monard during the 2006 outburst.

Rod Stubbings,
Tetoora Observatory,
Tetoora Road,
Vic, Australia

From: "Berto Monard" <Lagmonar at csir.co.za>
To: <cba-news at cbastro.org>;
<vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp>; <AVSON at yahoogroups.com>
Cc: <cbat at cfa.harvard.edu>
Subject: [vsnet-alert 9158] V591 Cen position
Date: Monday, December 04, 2006 11:06 PM

The actual position (2000) of the probable CV, V591 Cen, based on
astrometry on an outburst image gave:

12 42 17.95 -33 34 07.1  (vs UCAC2) with positional uncertainties of
0.03 and 0.15 respectively.
This is 2.3"N and 2.2"W of the previously assumed counterpart which has
position end figures: 18.12 and 09.4 .
The CV atlas considers V591 Cen as a non-cv based on spectral
measurements performed on this incorrectly assumed counterpart.

The brightness of V591 Cen on the above image (unfiltered CCD) was
15.5CR (UT 2006 nov30.1).
The object is not shown on DSS2-red to a magnitude limit of well
beyound 20.

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