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Table 1.

Journal of the spectroscopic observations.

Date Julian Date Phase (a) Telescope Instrument Integration (s) z rlap (b)
Optical
2021 April 01 (c) 2459305.90 −10.19 MMT BINOSPEC 300 0.030 ± 0.006 9.6
2021 April 10 2459314.57 −1.82 NOT ALFOSC 900 0.037 ± 0.005 12.1
2021 April 13 2459317.90 +1.39 APO 3.5-m DIS 1800 0.036 ± 0.006 14.5
2021 April 16 2459320.56 +3.96 NOT ALFOSC 900 0.035 ± 0.003 18.1
2021 April 20 2459324.62 +7.87 NOT ALFOSC 900 0.044 ± 0.004 16.0
2021 May 05 2459338.69 +21.45 NOT ALFOSC 900 0.035 ± 0.004 15.0
2021 May 16 2459351.50 +33.81 NOT ALFOSC 1800 0.035 ± 0.003 17.3

NIR

2021 April 11 2459315.91 −0.53 IRTF SpeX 1079

Notes.

(a)

Rest-frame days relative to the epoch of B-band maximum, i.e., JD 2459316.46.

(b)

Each redshift inferred by SNID carries a rlap parameter. This is a reliability metric that reflects the strength of the spectral cross correlation and the extent of wavelength overlap between the observed spectrum and the matched template. Higher rlap values correspond to better spectral matches, and values above ≈5 are generally considered significant for classification.

(c)

Terreran (2021) reported a redshift of z = 0.035 to the Transient Name Server along with their classification spectrum.

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