[vsnet-alert 11787] Re: TT Ari: fast fading tonight!

[Josch Hambsch]

Hi,

I could image TT Ari last nght from Belgium with the 40cm and STL11K, V 
filter.
There was a lot of variability during the 2.5h I could observe the star.b 
The change in brightness was visible on the images.
I use AIP4Win for reduction of the images, since my other programm did not 
identify TTAri in all the images.

Check star was AUID 000-BJR-301 (V = 12.489 mag)
Comp star was AUID 000-BJR-300 (V = 11.829 mag)

Regards,

Josch Hambsch (HMB)

http://www.astronomie.be/hambsch
----- Original Message ----- 
From: "Ivan Andronov" <tt_ari at ukr.net>
To: <vsnet-chat at ooruri.kusastro.kyoto-u.ac.jp>
Cc: <vsnet-campaign-dn at ooruri.kusastro.kyoto-u.ac.jp>; 
<vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp>
Sent: Wednesday, January 27, 2010 2:43 PM
Subject: [vsnet-alert 11786] TT Ari: fast fading tonight!


> 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
>
>
> 
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