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Table 1

COS/HST log of observations for the five pulsating DB stars in the sample.

Target Date Exposure [s] Aperture Grating Central λ Opt.

EC 20058-5234 2011-11-19 1100.64 PSA G130M 1283.307 15.58 (V)
2011-11-19 3423.58 PSA G160M 1604.309
WD J1929+4447 2012-11-09 5182.72 PSA G130M 1283.080 18.21 (V)
2012-11-09 5882.67 PSA G160M 1604.282
EC 04207-4748 2012-10-24 1419.14 PSA G130M 1283.264 15.30 (V)
2012-10-24 2193.25 PSA G160M 1604.418
PG 1115+158 2013-02-01 1734.05 PSA G130M 1283.322 16.61 (g)
2013-02-01 5246.78 PSA G160M 1604.271
WD 1654+160 2013-07-04 1409.08 PSA G130M 1283.307 16.62 (g)
2013-07-04 2403.42 PSA G160M 1609.345

Notes. The last column (opt) gives the optical photometry used for the parameter determination (Johnson V or SDSS g).

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