CCD calibration performed in 2007 - 2008
(27-Jul-2017 prepared by Aki Takeda : used for the discussion with Sakao-san
in preparation for the 2017 calibration.)
The previous CCD calibration was performed in 2007 to 2008.
The following two XOBs were used.
- XOB#146F ran on 2008/01/07.
- XOB#1553 ran on 2008/07/31.
- XOB#13D5 ran on 2007/07/23.
- XOB#13D8 ran on 2007/07/22.
Results from the previous calibration.
Dark current variation with CCD temperature.
(Solid black line: data obtained before launch.
Blue points : data obtained during normal observation mode.
Red points : data obtained during CCD bakeout.)
From a poster presentation (Bando, Kano, et al., 2008)
in a Japanese meeting.
Considerations.
The problem with the 2017 calibration is that the G-band VLS=close
images are significantly affected by the stray light since 14-Jun-2015.
The above XOBs should be modified.
[click image to enlarge]
