Updated Monitor for Narrow Spectral Artifacts at the LIGO Hanford Observatory

LIGO (Laser Interferometer Gravitational-wave Observatory) has detected compact binary coalescence events and it can, in theory, detect many other types of gravitational waves. One type of theorized gravitational wave is continuous waves. Produced by slightly non-axisymmetric rapidly rotating neutron stars, these gravitational waves are extremely weak, at least one-thousand times weaker than currently detectable events, and persist for entire observing runs. Single frequency noise, colloquially known as lines, obscure any potential continuous wave detections. While updating a monitor used to visually detect change points in the number of lines, I found a particularly bad source of line contamination. I showed a connection between increased line contamination and particularly large vibrations in the fibers that suspend the mirrors of the interferometer. Persistent for up to a month at a time and only appearing in the latest observing run, it is yet unclear why a phenomenon which has been observed in every observing run is only now causing additional line contamination. Going forward, we hope to significantly reduce the effect of this contamination on continuous wave searches by investigating the effect of changes made between observing runs on line contamination.