TT Ari: "Intermediate-High" Luminosity State Transition and Now Back
Abstract
. We report on the presently continuing "outburst-like" event in TT Ari with an amplitude of 0.9m (R) and characteristic timescales dt/dm=15.87(11)days/mag (rise at JD 2453704-715) and dt/dm=4.95(7)days/mag (fall at HJD 2453721-724). TT Ari has been recently found to be out of the "positive superhump" state, which lasted from 1997 (Skillman et al. , 1998, ApJ, 503 L67; Andronov et al., 1999, AJ, 117, 574) to at least 2004 (Andronov, Ostrova & Burwitz 2004, VSNET-Campaign 1555, http://uavso.pochta.ru/TTAri), by Andronov, Gazeas & Niarchos (2005, VSNET-Campaign 1630, http://uavso.pochta.ru/ TTAri2005).
- Publication:
-
The Astronomer's Telegram
- Pub Date:
- January 2006
- Bibcode:
- 2006ATel..698....1Y
- Keywords:
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- Optical;
- Binaries;
- Cataclysmic Variables;
- Variables