[vsnet-alert 11786] TT Ari: fast fading tonight!

[Ivan Andronov]

TT Ari: fast fading tonight!

Tonight TT Ari showed rather fast and deep fading. It has been rather bright (~13.8 R) at the beginning of the night and became only 15.45 R in the end of my observations. Light curve is attachged.

JD                   mag(CR) code
2455223.61517 13.99      VIR
2455223.61780 13.89      VIR
2455223.62044 13.81      VIR
2455223.62308 13.80      VIR
2455223.62573 13.76      VIR
2455223.62836 13.77      VIR
2455223.63104 13.82      VIR
2455223.63370 13.81      VIR
2455223.63634 14.01      VIR
2455223.63907 14.07      VIR
2455223.64169 14.07      VIR
2455223.64432 14.05      VIR
2455223.64701 14.07      VIR
2455223.64965 13.95      VIR
2455223.65231 13.99      VIR
2455223.65497 14.03      VIR
2455223.65763 14.12      VIR
2455223.66028 14.30      VIR
2455223.66291 14.34      VIR
2455223.66558 14.38      VIR
2455223.66822 14.49      VIR
2455223.67086 14.43      VIR
2455223.67351 14.51      VIR
2455223.67615 14.78      VIR
2455223.67877 14.66      VIR
2455223.68141 14.58      VIR
2455223.68410 14.77      VIR
2455223.68677 14.87      VIR
2455223.68938 14.88      VIR
2455223.69203 15.03      VIR
2455223.69468 15.14      VIR
2455223.69730 15.37      VIR
2455223.69993 15.31      VIR
2455223.70260 15.21      VIR
2455223.70527 15.45      VIR

Telescope: AP180 + SBIG STL-11000
Filter: clear, which is wider, but close to R-band (CR):
Rc-R=-0.04(+-0.011)+0.083(+-0.024)*(V-R)
Exposure: 180s
Tzec Maun observatory, USA

Virnina Natalia,
Odessa (ONMU,ONU), Ukraine