(20 May, 2017 by Aki Takeda)
(13 Oct, 2017: After PREP plots corrected using MSU_XRT_PREP.)
|ID No.||date & time (UT)||XOB||purposes (link: obtained plots & images)||memo|
|1||09-May-2017, 18:11:30||1B83||light curve, Ti-poly (1s) and Al-mesh (2.83s) at DC.||prev. bakeout + 14 days.|
|2||10-May-2017, 18:47:00||1B84||light curve, Al-poly (4s), Thin-Be (11.3s) at DC||prev. bakeout + 15 days.|
|3||11-May-2017, 17:41:30||1B85||light curve, med-Al (32s) at DC||prev. bakeout + 16 days.|
|4||12-May-2017, 18:17:00||1B86||light curve, med-Be (22s) at DC||prev. bakeout + 17 days.|
|Ti-poly, 20150718(1.4s)||Ti-poly, 20170509(1.0s)||After PREP comparison||Ti-poly, 20160510(1.0s)|
The Al-mesh "After PREP comparison" plot shows that the stray light intensity on 2017/05/09 is 10% smaller than that of 2015/07/18, in spite of the time difference since the previous CCD bakeout (+14 and +2 days, respectively). This suggests that the Al_mesh stray light intensities are affected by other factors than CCD contamination thickness.
|After PREP comparison||Al-mesh, 20160510(2.8s)|
In plots below exposure difference is not corrected yet.