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Table A.4.

Log of the spectroscopic observations for SN 2020dpw and SN 2021sjt.

Instrument Observation date MJD Phase Range R
(days) (Å) (λλ)
SN 2020dpw
ALPY600 2020-03-18 58926 20 4000 − 7300 100

SN 2021sjt
OGG 2m FLOYDS 2021-07-10 59405 13 3500 − 10000 400-700
OGG 2m FLOYDS 2021-07-13 59408 15 3500 − 10000 400-700
OGG 2m FLOYDS 2021-07-16 59411 19 3500 − 10000 400-700
OGG 2m FLOYDS 2021-07-17 59412 20 3500 − 10000 400-700
OGG 2m FLOYDS 2021-07-25 59420 28 3500 − 10000 400-700

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