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Table 1

List of observed spectra used.

SN Date Phase (days) Wl (Å) Resolution (Å) Telescope (spectrograph) Source

SN 1993J 1993-Jul-12 106 338010 660 11 INT (FOS1) Lewis et al. (1994)
1993-Jul-23 117 33009400 11 Asiago 1.8 m (B&C/300) Barbon et al. (1995)
1993-Sep-15 171 40009150 22 Asiago 1.8 m (B&C/150) Barbon et al. (1995)
1993-Sep-20 176 34009340 8 WHT (ISIS) Meikle et al. unpub.
1993-Nov-07 224 40008800 8 WHT (ISIS) Meikle et al. unpub.
1993-Dec-17 264 35009500 10 WHT (ISIS) Meikle et al. unpub.
1994-Jan-05 283 35009200 8 WHT (ISIS) Meikle et al. unpub.
1994-Feb-17 326 37009400 6 INT (IDS) Meikle et al. unpub.
1994-Apr-20 388 56009400 6 INT (IDS) Meikle et al. unpub.
1994-May-17 415 34009200 8 WHT (ISIS) Meikle et al. unpub.
SN 2008ax 2008-Jun-11 100 33509300 11 TNG (DOLORES) T11
2008-Jun-12 101 880024 500 22, 26 TNG (NICS) T11
2008-Jun-27 116 33006400 13 Calar Alto-2.2 m (CAFOS,B200) T11
2008-Jul-03 122 44007900 11 MDM/CCDS M10
2008-Jul-11 130 880024 500 22, 26 TNG (NICS) T11
2008-Jul-24 143 36009400 24, 38 Asiago-1.8 m (AFOSC) T11
2008-Aug-01 151 45007700 6 MDM/Modspec M10
2008-Dec-08 280 430010 200 11 TNG (DOL.) + Asiago (AFO.) T11
2008-Jan-25 328 41508000 7 MMT/Blue channel M10
2009-Feb-25 359 52009200 16 TNG (DOLORES) T11
2009-Apr-22 415 42007800 11 MDM/CCDS M10
SN 2011dh 2011-Aug-27 88 900025 000 27–75 TNG (NICS) E14a
2011-Sep-07 99 350010 500 12 Calar Alto-2.2 m (CAFOS) E14a
2011-Oct-30 152 37008200 20 Asiago-1.8 m (AFOSC) E14b
2011-Dec-15 198 890015 100 17 WHT (LIRIS) E14b
2011-Dec-19 202 320010 000 8, 15 WHT (ISIS) E14b
2011-Dec-23 206 14 00025 000 59 TNG (NICS) E14b
2012-Mar-19 293 35009100 16 NOT (ALFOSC) E14b
2012-May-24 359 34407600 15 GTC (OSIRIS) E14b
2012-May-25 360 480010 000 21 GTC (OSIRIS) E14b
2012-Jul-20 415 36007000 17 GTC (OSIRIS) E14b

Notes. The phases are relative to the estimated explosion epochs.

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