[Aavso-photometry] Correction: TT Ari Observations Needed

[Aaron Price]

Correction: In the first paragraph I say "RT Ari" but it should be "TT Ari".

Aaron

---------- Forwarded message ----------
From: Aaron Price <aprice at gmail.com>
Date: Sep 9, 2005 3:07 PM
Subject: TT Ari Observations Needed
To: "aavso-photometry at aavso.org" <aavso-photometry at aavso.org>
Cc: cvnet-outburst <cvnet-outburst at yahoogroups.com>


 Hey, all.  Both Arne and I are away right now so we can't do a full
court press on this object as yet. However, RT Ari has begun a fade
based on these visual observations:

TT ARI     SEP 09.4056 2453622.9056    11.4   CCY
TT ARI     SEP 07.9271 2453621.4271    11.3   MUY
TT ARI     SEP 07.4236 2453620.9236    11.4   CCY
TT ARI     SEP 04.9236 2453618.4236    10.9   MUY

MUY MUYLLAERT, EDDY BELGIUM
CCY CAREY CHISELBROOK  GEORGIA, USA

 It's last major fade ended in 1984! Although since then it has shown
some shallow fades like this so we cannot be sure that this is the
beginning of a major fading event. However, if so it will be very
important. Here is a beautiful light curve of TT Ari:

http://www.aavso.org/tmp/ttari.png

  Please observe visually and CCD observers in B and V a few times per
night. If you notice that it drops below V=12 then it is likely the
start of a major fading event so begin time series observations in V
and B for as long as possible. And let us know ASAP! :) Set your
exposures to get SNR=100. This is a bright system so it should be
fairly easier than other recent campaigns.

   Right now the AAVSO only has a visual chart but Arne has calibrated
the field. In about 6 hours I will post some B and V values of
comparison stars. (I won't be able to make a full chart until I get
back to HQ the week after next.)

 TT Ari is an interesting and unique star that defies easy
classification. It has the spectra of a CV but not the typical CV
behavior as it usually stays in the high state. Detailed information
is available here:
                              http://www.aavso.org/vstar/vsots/0102.shtml

--
Aaron


-- 
Aaron