After Georgia plotted the absorption data for ITMY in alog 62468, I compared the ITMY and ITMX cooldown data after the Tuesday lockloss. See attached. This data doesn't have the characteristic shape, especially as if there is point absorbers (as Jenne shows in alog 62598) we would expect an even faster cool down. Georgia measurement 369ppb absorption in ITMY, if we trust this HWS data we have ~290ppb absorption in ITMX.
The spherical power for ITMX looks much noisier and I'm concerned that we have the spherical power coupling with the total pixel value from the IFO power or beam pointing. As seen in the attachment. I plan to adjust the alignment to reduce this.
Dan Brown pointed out that the spherical power is calculated based on the center of the optic being at the center of the HWS CCD camera which is not the case currently for ITMX. I've adjusted H1:TCS-ITMX_HWS_ORIGIN_Y and _X from the center of the camera: 511.5 pixels to 600 pixels. This looks to be the center of the optic from the RH test.
