Free decay fits of the known KIC 11084727 dip reach each of three tested time-scale bounds

We test a free decay power in a finite crossing model of the known day-1076 dip of KIC 11084727. In 12 Kepler release 25 fits, the free model reduces residual error but its time scale reaches the lower bound of 0.03 day. Two reference fits also reach each smaller bound of 0.003 and 0.0003 day. The fitted power changes from about 0.4 to about 0.21. No real-flux control among 11 windows per product has as large an error reduction at any tested bound. This small comparison does not establish a physical decay law. The bound dependence prevents a unique time-scale or dust-lifetime measurement. Baseline errors, chord model error, stellar variation and instrument effects remain possible. We report no new object and no independent telescope confirmation. The package includes exact input data, provenance, code, numerical checks, all fits and controls, figures and offline instructions.

astronomy · Kepler · KIC 11084727 · exocomet · model identifiability · dust tail