1. XRT CCD Spot Detection after 13th bakeout
N. Narukage (ISAS/JAXA)

2. Difference of spot map between after 8th and 13th bakeout
white pixels : created spots
black pixels : disappeared spots
On the basis of this difference image, the number of white and black pixels is comparable (the actual number is described in next slide).
It is likely that there is no spot creation and growth.
XC = 1024, YC = 1024 XS=512, YS = 512

3. Summary of bakeouts #
date
duration (ON ~ OFF)
Interval
baking monitor
Quadrant G-band
data loss
white pixels
black pixels
spot ratio to full CCD
spot created?
12th
2008/07/11
18 hrs
3 weeks
G-band
Q, 44 ms Q, 64ms
0.4 %
0.0 %
0.27 %
0.25 %
0.28 %
5.26 %
5.24 % N
13th
2008/08/05
3.5 weeks
Q, 44 ms
5.23 %
Q : quadrant
C : center only
white pixels : created spots compared with after 8th bakeout black pixels : disappeared spots compared with after 8th bakeout

4. Summary of bakeouts #
date
duration (ON ~ OFF)
Interval
baking monitor
Quadrant G-band
data loss
white pixels
black pixels
spot ratio to full CCD
spot created?
5th
2008/02/21
24 hrs
2 weeks N
Q, 44 ms
0.4 % --
5.31 %
6th
2008/03/06
18 hrs
C, 64 ms
No quadrant observation
7th
2008/03/27
3 weeks
C, 64 ms Q, 44 ms
quadrant observation was performed 1 week after 7th bakeout
8th
2008/04/17
0.0 %
reference
5.26 %
9th
2008/05/15
4 weeks
Q, 64 ms
0.26 %
0.27 %
5.25 %
10th
2008/05/29
Q, 44 ms Q, 64 ms
0.0 % 0.0 %
0.28 % 0.27 %
0.25 % 0.26 %
5.29 % 5.27 %
N N
11th
2008/06/19
G-band
0.29 % 0.27 %
5.30 % 5.28 %
Q : quadrant
C : center only
white pixels : created spots compared with after 8th bakeout black pixels : disappeared spots compared with after 8th bakeout