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Near-IR observations are important for the detection and characterization ofexoplanets using the transit technique, either in surveys of large numbers ofstars or for follow-up spectroscopic observations of individual planets. In acontrolled laboratory experiment, we imaged $\sim 10^4$ critically sampledspots onto an Teledyne Hawaii-2RG (H2RG) detector to emulate an idealizedstar-field. We obtained time-series photometry of up to $\simeq 24$ hr durationfor ensembles of $\sim 10^3$ pseudo-stars. After rejecting correlated temporalnoise caused by various disturbances, we measured a photometric performance of$<$50 ppm-hr$^{-1/2}$ limited only by the incident photon rate. After severalhours we achieve a photon-noise limited precision level of $10\sim20$ ppm afteraveraging many independent measurements. We conclude that IR detectors such asthe H2RG can make the precision measurements needed to detect the transits ofterrestrial planets or detect faint atomic or molecular spectral features inthe atmospheres of transiting extrasolar planets.

Precision Near Infrared Photometry For Exoplanet Transit Observations - I : Ensemble Spot Photometry for An All-Sky Survey