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Description
This work presents an analysis of the main glitch groups observed in the LIGO observatories during the O4a observing run. Glitches are non-Gaussian noise transients that can obscure or mimic astrophysical signals in gravitational-wave data. Understanding their origin is essential for improving data quality and detector performance. To this end, we use spectrogram representations of these unwanted signals, obtained via the Q-transform, combined with t-Distributed Stochastic Neighbor Embedding (t-SNE) to explore their morphological similarities, track their evolution over time, and investigate potential correlations with environmental and instrumental variations. At the Livingston observatory, the most common glitches during this period were seasonal and associated with ground motion, while Hanford exhibited a predominance of glitches linked to instrumental factors.
