We report on analysis of 308.3 hrs of high speed photometry targeting the pulsating DA white dwarf EC14012-1446 .
The data were acquired with the Whole Earth Telescope ( WET ) during the 2008 international observing run XCOV26 .
The Fourier transform of the light curve contains 19 independent frequencies and numerous combination frequencies .
The dominant peaks are 1633.907 , 1887.404 , and 2504.897 \mu Hz .
Our analysis of the combination amplitudes reveals that the parent frequencies are consistent with modes of spherical degree l =1 .
The combination amplitudes also provide m identifications for the largest amplitude parent frequencies .
Our seismology analysis , which includes 2004–2007 archival data , confirms these identifications , provides constraints on additional frequencies , and finds an average period spacing of 41 s. Building on this foundation , we present nonlinear fits to high signal-to-noise light curves from the SOAR 4.1m , McDonald 2.1m , and KPNO 2m telescopes .
The fits indicate a time-averaged convective response timescale of { \tau _ { 0 } = 99.4 \pm 17 } s , a temperature exponent N = 85 \pm 6.2 and an inclination angle of \theta _ { i } = 32.9 \pm 3.2 ^ { \circ } .
We present our current empirical map of the convective response timescale across the DA instability strip .