Determine the extinction toward PR Ori B during outburst

Determine the extinction toward PR Ori B during its FU Ori outburst and reconcile the discrepant values inferred from near-infrared photometry, near-infrared spectroscopy, and optical-to-infrared spectral-energy-distribution modeling.

Background

The paper estimates the visual extinction toward PR Ori B using three approaches: near-infrared colors, comparison of its outburst spectrum with FU Ori, and disk-model fits to optical and infrared photometry. These methods produce substantially different values, ranging from approximately 1 to 3.9 magnitudes in A_V.

The extinction is important because it affects the inferred luminosity and accretion rate of the outburst. The authors explicitly leave the discrepancy unresolved, making a consistent determination of the outburst extinction an unresolved problem.