Determining the Cause of Photometric Variations in Absorption Bodies: A Detailed Analysis Approach

From the statistical sample, we cannot determine the exact cause of every absorption body's photometric variation. To make a definitive determination, a detailed analysis of each spectrum is required. For instance, if the spectra from multiple observations of a single source show features such as 1. coordinated photometric variations in multiple absorption systems, 2. line-locking phenomena in absorption lines, 3. ..., it tends to indicate ionization variations as the cause. On the other hand, if ..., it tends to suggest transit events as the cause.