  We present and discuss an extensive data set for the non-Blazhko ab-type RR
Lyrae star SDSSJ015450+001501, including optical SDSS ugriz light curves and
spectroscopic data, LINEAR and CSS unfiltered optical light curves, and
infrared 2MASS JHKs and WISE W1 and W2 light curves. Most notably, light curves
obtained by 2MASS include close to 9000 photometric measures collected over 3.3
years and provide exceedingly precise view of near-IR variability. These data
demonstrate that static atmosphere models are insufficient to explain
multi-band photometric light curve behavior and present strong constraints for
non-linear pulsation models for RR Lyrae stars. It is a challenge to modelers
to produce theoretical light curves that can explain data presented here, which
we make publicly available.
