Luminous, rapidly declining supernovae as stripped transitional objects in low-metallicity environments: The case of SN 2022lxg

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Table 1.

Basic properties of SN 2022lxg.

Property	Value
z	0.0214 ± 0.0006
E(B − V)_MW	0.059 mag
MJD of last non detection (i band)	59 730.45
MJD of first detection (g band)	59 731.39
MJD of explosion	59 731.37 $_{- 0.06}^{+ 0.04}$ $^{+0.04}_{-0.06}$
Peak g MJD (phase)	59 739.14 $_{- 2.23}^{+ 2.23}$ $^{+2.23}_{-2.23}$ (+7.6 d)
Peak g magnitude	−19.41 ± 0.01 mag
Peak r MJD (phase)	59 745.17 $_{- 1.47}^{+ 1.47}$ $^{+1.47}_{-1.47}$ (+13.5 d)
Peak r magnitude	−19.31 ± 0.02 mag
Peak i MJD (phase)	59 746.26 $_{- 2.89}^{+ 2.81}$ $^{+2.81}_{-2.89}$ (+14.6 d)
Peak i magnitude	−19.09 ± 0.02 mag
End-of-rise r MJD	59 741.59 ± 1.73
End-of-rise r magnitude	−19.27 ± 0.10 mag
Decline (g band)	3.48 ± 0.26 mag (50 d)⁻¹
Half-flux duration (g band)	25.70 ± 0.26 days
M(⁵⁶Ni) (from peak)	< 0.729 ± 0.163 M_⊙
M(⁵⁶Ni) (from tail)	≥0.003 ± 0.002 M_⊙

Notes. MJDs are in observer frame, durations are in rest-frame. Unless indicated otherwise, we use the g band as the reference. The peak epochs and magnitudes are inferred as described in Sect. 3.2.1. We derive the ⁵⁶Ni mass estimates from the luminosities calculated with two different methods, either from the blackbody fits and the Stefan-Boltzmann law, or from the pseudo-bolometric luminosity estimates (see Sect. 3.2.2 for details). We provide the median values of the different tail (313.1 d; 0.001 − 0.009 M_⊙) and peak estimates (0.247 − 1.210 M_⊙).

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