Carnegie Supernova Project-II: A New Method to Photometrically Identify Sub-types of Extreme Type Ia Supernovae

Ashall, C.; Lu, J.; Burns, C.; Hsiao, E. Y.; Stritzinger, M.; Suntzeff, N. B.; Phillips, M.; Baron, E.; Contreras, C.; Davis, S.; Galbany, L.; Hoeflich, P.; Holmbo, S.; Morrell, N.; Karamehmetoglu, E.; Krisciunas, K.; Kumar, S.; Shahbandeh, M.; Uddin, S.
2020
ASTROPHYSICAL JOURNAL LETTERS
DOI
10.3847/2041-8213/ab8e37
We present a new method to photometrically delineate between various sub-types of Type Ia supernovae (SNe Ia). Using the color-stretch parameters, s(BV) or s(gr), and the time of i-band primary maximum relative to the B-band (