We report near-IR spectroscopic observations of SN 2026bgd (first reported in AstroNote 2026-15) revealing the transient is a young Type Ia supernova. Observations were taken with the TripleSpec spectrograph on SOAR taken during the 2026 Jan 27 UT AEON run. The spectrum shows broad P-Cygni features from Mg and potentially C between 0.9 -- 1.2 micron, and the H-band line complex (likely dominated by Mg) characteristic of thermonuclear transients in the NIR.
We attach a comparison plot of the spectrum to early NIR spectra of several thermonuclear transients (SNe 2011fe, 2022xkq, 2024epr and iPTF13ebh), and find particularly good matches to the low-luminosity 91bg-like SN 2022xkq and SN 2011fe. Follow-up observations in both optical and IR wavelengths are highly encouraged.
The transient was discovered by ATLAS, and scheduled for follow-up using the target management platform YSE-PZ (Coulter et al., 2023, PASP, 135, 4501). Observations were carried out as part of SOAR2025B-001 (PI Davis), a program in support of the Keck Infrared Transient Survey (PI Foley). We thank the SOAR observatory staff for enabling this science via observations through the AEON queue.
| Catalog | Name | Reported RA | Reported DEC | Reported Obj-Type | Reported Redshift | Host Name | Host Redshift | Remarks | TNS RA | TNS DEC | TNS Obj-Type | TNS Redshift |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TNS | 2026bgd [ATLAS26bca] | 13:20:59.018 | -43:40:35.83 | SN Ia | 0.0113 | 13:20:59.037 | -43:40:35.69 | SN Ia | 0.004 |
Comments