ZTF SN Ia DR2
Open Access

Table 2.

Environmental steps for blue (c < 0) and red (c > 0) SNe.

α Tracer Blue steps Red steps
Linear (g − z)local 0.136 ± 0.037 0.141 ± 0.028
log(M/M)global 0.134 ± 0.031 0.149 ± 0.027

Broken (g − z)local 0.151 ± 0.014 0.173 ± 0.011
log(M/M)global 0.147 ± 0.014 0.162 ± 0.012

Notes. We show steps for a linear α and a broken α standardisation (see Sect. 4).

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