85 short GRB kilonovae opt. & NIR obs.

To investigate short GRB observations in the context of diverse kilonova behavior, we present a comprehensive optical and near-IR catalog of 85 bursts discovered over 2005-2020 on timescales of <~12days. The sample includes previously unpublished observations of 23 bursts and encompasses both detections and deep upper limits.

We identify 11.8% and 15.3% of short GRBs in our catalog with upper limits that probe luminosities lower than those of AT2017gfo and a fiducial neutron star-black hole kilonova model (for pole-on orientations), respectively. We quantify the ejecta masses allowed by the deepest limits in our catalog, constraining blue and "extremely blue" kilonova components of 14.1% of bursts to M_ej_<~0.01-0.1M_{sun}_. The sample of short GRBs is not particularly constraining for red kilonova components.