Table A.1
SBF to PNLF comparison.
| Sample | Number of galaxies | ΔPNLF − SBF (rms) | Median difference |
| (mag) | (mag) | ||
|
|
|||
| Original1 | 28 | −0.36 (0.31) | −0.36 |
| a2 | 28 | −0.23 (0.31) | −0.23 |
| b3 | 33 | −0.21 (0.29) | −0.23 |
| c4 | 33 | −0.22 (0.30) | −0.29 |
| d5 | 33 | −0.18 (0.34) | −0.26 |
Notes.
Original PNLF sample by Ciardullo et al. (2002) with SBF distances from Tonry et al. (2001).
Tonry et al. (2001) SBF & Ciardullo et al. (2002) PNLF with revised zero points based on metallicity dependent PL relations for Cepheids (see text).
Tonry et al. (2001) SBF & Ciardullo et al. (2002) PNLF plus more recent PNLF distances from Feldmeier et al. (2007, NGC 1380, NGC 4526, Sambhus et al. (2006, NGC 4697, Teodorescu et al. (2005, 2010, NGC 1344 and NGC 821 and Herrmann et al. (2008, NGC 4376. For both distance indicators revised zero points are used, as in sample b except for NGC 4697, NGC 1344 and NGC 821 whose PNLF distance is independent from Ciardullo et al. calibration.
Updated SBF distances from ACSVCS (Côté et al. 2004) & ACSFCS (Jordán et al. 2007) (when available). Old SBF and PNLF distances as in sample b.
As sample c except that SBF with Q-corrected SBF distances (see text) are used for the old Tonry et al. (2001) distance moduli.
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