Jin-Ming Zhang

Uber-calibration-based Two-level Radial-velocity Zero-point Correction for APOGEE

APOGEE delivers high-resolution, near-infrared spectroscopy and highly precise radial velocities (RVs), with extensive repeat observations spanning more than a decade. Long-term RV repeatability is nevertheless limited by instrumental zero-point systematics: exposure-to-exposure drift and fiber-dependent offsets that a...