[vsnet-alert 11812] TT Ari: fast and deep fading

[Natalia Virnina]

TT Ari: fast and deep fading.

During the short series (near 0.5 h on February 12, 2010) TT Ari
showed extremely fast and deep fading: from 14.2 (V) to 16.2 (V).
Also we noticed variation of the color index. Light curves in V and R,
interpolated curves and color index curve are attached.

Recent observations:

JD                   mag(R)
2455239.64194 14.151
2455239.65259 14.053
2455239.65558 14.403
2455239.65851 14.738
2455239.66143 15.319
2455239.66436 15.936
2455239.66731 15.916

JD                   mag(V)
2455239.64527 14.198
2455239.65118 14.458
2455239.65414 14.565
2455239.65709 15.102
2455239.66001 15.122
2455239.66294 16.049
2455239.66588 16.244

The observations were obtained using the telescope of Tzec Maun
Observatory (USA):
Telescope: Maksutov-Newtonian 14" + SBIG ST-10E
Filters: VR
Exposures: 60 s (R), 100 s (V)


Natalia Virnina & Odessa National Maritime University's working group
Department "High and Applied Mathematics"
Odessa National Maritime University
Odessa, Ukraine