Gaussian Mixture Clustering for Changing-Look Blazar Candidates
Treats changing-look blazars -- objects that transition between FSRQ and BL Lac spectral types -- as an intermediate group in the space of eight physical blazar parameters, and applies Gaussian mixture model clustering across parameter subsets of the 4FGL gamma-ray catalog to flag new candidates. Candidate subsets are ranked by adjusted Rand index against known objects, yielding a vetted list of changing-look blazar candidates for follow-up.
2501.00094
The changing-look blazars (CLBs) are the blazars that their optical spectral lines at different epochs show a significant changes and present a clear transition between the standard FSRQ and BL Lac t…