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Table 3

Atmospheric parameters used in the calibrations.

Star Ref. Teff log g log [n(He)/n(H)] Spectral type Comments
[103K] [cms-2]

PG0039+135 1 45.0 5.00 1.00 sdOC7VII:He40 abundance uncertain
PG0101+040 8 27.3 5.50 −2.70 sdB2VII:He4
PG0133+114 8 29.6 5.66 −2.30 sdB1.5VII:He4
PG0208+016 1 40.0 5.00 1.00 sdO9VII:He39 abundance uncertain
PG0229+064 9 19.0 4.55 −0.80 sdB3V:He13
PG0240+046 7 34.0 5.40 0.23 sdBC0.2VII:He24
PG0342+026 11 25.4 5.44 −2.72 sdB3VII:He4 upper limit to abundance
PG0838+133 1 44.0 4.80 1.00 sdOC7VII:He40 abundance uncertain
PG0856+121 11 24.2 5.47 −4.00 sdB3VII:He0 upper limit to abundance
PG0907+123 6 26.2 5.30 −1.74 sdB2VI:He2
PG1127+019 7 39.9 5.00 2.00 sdOC9VII:He40
PG1245−042 10 16.4 3.95 −1.55 sdB7IV:He3e
PG1249+762 1 68.0 5.80 1.00 sdOC2VIII:He36 lower limit to abundance
PG1323−086 5 15.7 2.35 −0.83 sdB3I:He8
PG1325+054 1 41.0 5.00 1.30 sdO8VII:He40 lower limit to abundance
PG1401+289 1 47.0 5.50 1.30 sdOC7VII:He40 lower limit to abundance
PG1415+492 7 32.2 4.20 2.00 sdBC1V:He38
PG1432+004 14 22.4 5.15 −2.28 sdB2VII:He6
PG1453−081 10 16.3 4.20 −0.97 sdB5IV:He7
PG1453−085 10 12.0 3.20 −1.37 sdB8III:He0
PG1519+640 13 30.6 5.72 −2.17 sdB1.5VII:He5
PG1536+690 1 63.0 5.80 1.00 sdOC2VIII:He40 lower limit to abundance
PG1554+408 7 37.7 5.20 2.00 sdBN0.2VII:He39
PG1615+413 7 36.0 5.20 2.00 sdBN1VII:He37
PG1624+085 1 40.0 5.30 1.30 sdO9VII:He39 lower limit to abundance
PG1627+017 6 22.8 5.27 −3.00 sdB3VII:He3
PG1644+404 14 30.0 5.78 −2.84 sdB1.5VII:He2
PG1646+607 1 48.0 6.00 0.00 sdO7VIII:He36
PG1648+536 13 31.4 5.62 −4.00 sdB1VII:He0 upper limit to abundance
PG1658+273 7 38.8 4.90 2.00 sdOC9.5VII:He39
PG1704+222 5 17.2 2.65 −0.94 sdB3I:He8
PG1708+142 3 20.0 3.70 −0.96 sdB2.5IV:He11
PG1715+273 7 34.7 5.00 2.00 sdB1VII:He35
PG1716+426 8 26.1 5.33 −2.90 sdB2VII:He3
PG1722+286 6 35.8 5.94 −1.46 sdB0VII:He10p
PG1725+252 6 28.9 5.54 −3.05 sdB1.5VII:He2
PG1743+477 6 25.5 5.41 −2.15 sdB2VII:He7
PG2120+062 4 38.0 4.25 −1.06 sdO9V:He17 assumed solar abundance
PG2158+082 1 67.0 5.50 1.00 sdO2VIII:He40 lower limit to abundance
PG2215+151 1 40.0 5.00 1.00 sdOC9VII:He40 lower limit to abundance
PG2258+155 12 40.6 5.71 2.00 sdB0.2VII:He39
PG2314+076 14 27.9 5.69 −4.00 sdB1.5VIII:He0p upper limit to abundance
PG2321+214 7 39.6 5.30 2.00 sdBN0VII:He37
PG2331+038 13 27.2 5.58 −2.70 sdB1.5VII:He2
PG2352+181 1 45.0 5.50 1.00 sdO7VII:He40 lower limit to abundance
BD+28 4211 2 82.0 6.20 −1.00 sdO2VIII:He5
HS1000+471 7 33.3 4.70 0.14 sdBC0.2VII:He28
HS1844+637 7 36.4 5.10 2.00 sdB1VII:He39
LSIV−14 116 7 32.5 5.40 −0.58 sdB0.5VII:He18
Ton 107 7 33.3 5.00 −0.25 sdBC0.2VII:He27

References. (1) Dreizler et al. (1990); (2) Napiwotzki (1993); (3) Conlon et al. (1993); (4) Moehler et al. (1994); (5) Moehler and Heber (1998); (6) Maxted et al. (2001); (7) Ahmad and Jeffery (2003); (8) Morales-Rueda et al. (2003); (9) Ramspeck et al. (2001); (10) Schmidt (1996); (11) Salomon (2003); (12) Hirsch (2009); (13) Copperwheat et al. (2011); (14) this paper.

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