KAGRA Logbook

I compared the ASDs of Oct15 and Nov7,8. In Nov 7,8's ASDs, I found that sidebands are appeared around many lines. I'm not sure the reason of these sidebands. I have not checked the exact locations of the lines and the width of the sidebands. Once the system-b cluster is recovered, I will check them.

Config: Starttime=14:00UTC, Duration=86400sec, tsft=1800sec, toverlap=900sec, window=hann, channel=K1:CAL-CS_PROC_DARM_STRAIN_DBL_DQ, IFOstatus= (K1:GRD-IFO_STATE_N==100) * (no IPC glitch)

Red: Oct15, Blue: Nov7, Green: Nov8,

Fig1: 450Hz-500Hz. You can find lines around 460Hz, 467Hz, 473Hz, 487Hz, 495Hz (I have not checked the exact location of peaks). For Nov7 and 8, these peaks have sidebands while they don't in Oct15.

Fig2: Zoom in a line at 467Hz.

Fig3: You can find similar sidebands on lines in 1020Hz-1080Hz.