[vsnet-chat 7348] TT Boo in 2007 April

[Seiichi Yoshida]

Dear colleagues,

Outburst of an UG-type cataclysmic variable TT Boo was detected, and
its rapid fading was recorded, in the course of the MISAO Project in
2007 April. 

  TT Boo  14h57m44s.8 +40o43'41"  Mag(max):12.7  Mag(min):<15.6
          MagSystem:p  Type:UG  Period:(45)

  Image:
    http://www.aerith.net/misao/report/variable/TT_Boo/200704-image.gif

  Light Curve:
    http://www.aerith.net/misao/report/variable/TT_Boo/200704-curve.gif

Here is our data in VSNET format:

BOOTT 20070409.79127 139C Mis
BOOTT 20070410.73019 139C Mis
BOOTT 20070410.73851 138C Mis
BOOTT 20070411.68985 139C Mis
BOOTT 20070411.69406 140C Mis
BOOTT 20070412.68314 141C Mis
BOOTT 20070412.68524 141C Mis
BOOTT 20070412.68946 140C Mis
BOOTT 20070414.68016 145C Mis
BOOTT 20070414.68227 146C Mis
BOOTT 20070414.68648 147C Mis
BOOTT 20070419.68845 166C Mis
BOOTT 20070423.64237 <173C Mis
BOOTT 20070423.64448 <172C Mis
BOOTT 20070423.65213 <175C Mis

2007 Apr. 9-23
  Nobuo Ohkura and Youichirou Nakashima
  Canon 500-mm f/4.5 camera lens + SBIG ST-8

The AAVSO database revealed that it was fainter than 16.5 mag until
Mar. 31, but it brightened up to 13 mag on Apr. 1. It kept brighter
than 14 mag until Apr. 17, then it faded rapidly as 16 mag on Apr. 19
and 17.5 mag on Apr. 20.

Best regards,

--
Seiichi Yoshida
comet at aerith.net
http://www.aerith.net/