A search of archival quasar spectra claims 19 objects show microlensing by compact dark matter with masses 5e-5 to 2e-2 solar masses, but the evidence hinges on a selection-biased model comparison.
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Constraining compact dark matter with time-varying quasar equivalent widths
A search of archival quasar spectra claims 19 objects show microlensing by compact dark matter with masses 5e-5 to 2e-2 solar masses, but the evidence hinges on a selection-biased model comparison.