Open Access
Table 2.
Spectroscopic observations of SN 2023ldh.
| Date (UT) | MJD | Phase | Instrumental configuration | Exptime (s) | Range (Å) | Res.( † ) (Å) |
|---|---|---|---|---|---|---|
| 2023-08-17 | 60173.95 | −63.05 | 10.4m GTC + OSIRIS + R1000B | 3600 | 3600–7780 | 6.8 |
| 2023-08-26 | 60182.90 | −54.10 | 10.4m GTC + OSIRIS + R1000B + R1000R | 1200+1200 | 3600–10250 | 6.7+7.6 |
| 2023-09-19 | 60206.88 | −30.12 | 3.56m TNG + Dolores + LRB | 3000 | 3500–7860 | 14.5 |
| 2023-10-09 | 60226.74 | −10.26 | 1.82m Copernico + AFOSC + VPH7 | 624 | 3400–7280 | 14.5 |
| 2023-10-10 | 60227.84 | −9.16 | 1.82m Copernico + AFOSC + VPH7 | 2700 | 3400–7280 | 14.4 |
| 2023-10-11 | 60228.77 | −8.23 | 1.82m Copernico + AFOSC + VPH7 | 3600 | 3280–3280 | 14.8 |
| 2023-10-12 | 60229.84 | −7.16 | 10.4m GTC + OSIRIS + R2500V + R2500R | 600+600 | 4415–7645 | 2.7+3.4 |
| 2023-10-13 | 60230.85 | −6.15 | 3.56m TNG + Dolores + LRR | 3600 | 5130–10270 | 11.1 |
| 2023-10-14 | 60231.82 | −5.18 | 2.56m NOT + ALFOSC + gm4 | 1800 | 3400–9670 | 14.0 |
| 2023-10-16 | 60233.84 | −3.16 | 2.56m NOT + ALFOSC + gm4 | 1200 | 3400–9670 | 13.8 |
| 2023-10-17 | 60234.85 | −2.15 | 1.82m Copernico + AFOSC + VPH7 | 1500 | 3400–7280 | 14.4 |
| 2023-10-25 | 60242.81 | 5.81 | 10.4m GTC + OSIRIS + R1000B | 400 | 3600–7780 | 6.8 |
| 2023-11-03 | 60251.75 | 14.75 | 1.82m Copernico + AFOSC + VPH7 | 1800 | 3300–7270 | 14.4 |
| 2023-11-07 | 60255.74 | 18.74 | 1.82m Copernico + AFOSC + VPH7 | 1800 | 3500–7270 | 14.5 |
| 2023-11-08 | 60256.73 | 19.73 | 1.82m Copernico + AFOSC + VPH6 | 900 | 5000–9280 | 15.1 |
| 2023-11-08 | 60256.74 | 19.75 | 1.82m Copernico + AFOSC + VPH6 (4″ slit) | 900 | 5000–9280 | 37 |
| 2023-11-14( ⋆ ) | 60262.72 | 25.72 | 1.82m Copernico + AFOSC + VPH7 | 1100 | 3400–7270 | 14.4 |
| 2023-11-15 | 60263.20 | 26.20 | 1.82m Copernico + AFOSC + VPH7 | 2400 | 3400–7270 | 14.4 |
| 2023-11-17 | 60265.19 | 28.19 | 1.82m Copernico + AFOSC + VPH6 | 2800 | 4990–9280 | 15.3 |
| 2023-11-17 | 60265.75 | 28.75 | 1.82m Copernico + AFOSC + VPH7 | 2800 | 3300–7270 | 14.4 |
| 2023-11-30 | 60277.26 | 40.26 | 2.56m NOT + ALFOSC + gm4 | 2400 | 3400–9620 | 17.5 |
| 2023-12-08 | 60286.26 | 49.26 | 2.56m NOT + ALFOSC + gm4 | 2700 | 3400–9620 | 17.6 |
| 2023-12-16 | 60294.26 | 57.26 | 2.56m NOT + ALFOSC + gm4 | 3600 | 3400–9680 | 13.7 |
| 2023-12-27 | 60305.25 | 68.25 | 2.56m NOT + ALFOSC + gm4 | 3600 | 3400–9680 | 13.3 |
| 2024-01-08( ⋆ ) | 60317.26 | 80.26 | 2.56m NOT + ALFOSC + gm4 | 3600 | 3400–9680 | 13.6 |
| 2024-01-09 | 60318.24 | 81.24 | 2.56m NOT + ALFOSC + gm4 | 3600 | 3400–9680 | 13.6 |
| 2024-01-29 | 60338.21 | 101.21 | 2.56m NOT + ALFOSC + gm4 | 5400 | 3400-9680 | 13.7 |
| 2024-02-27 | 60367.20 | 130.20 | 10.4m GTC + OSIRIS + R1000R | 2600 | 5050–10300 | 7.8 |
| 2024-03-03 | 60372.37 | 135.37 | 6.5m MMT + BINOSPEC + 270/mm + LP3800 | 3600 | 3830–9200 | 4.1 |
| 2024-05-01 | 60431.57 | 194.57 | Keck-I + LRIS + gr.600/4000 + gr.400/8500 | 3600 | 3150–10200 | 3.4+5.8 |
| 2024-05-04 | 60434.12 | 197.12 | 10.4m GTC + OSIRIS + R1000R | 3600 | 5090–10300 | 7.5 |
Notes. The phases are computed from the epoch of the r-band maximum light of Event B (MJD = 60237.0 ± 0.4). The spectra marked with the (⋆) symbol have poor S/Ns; hence, they are not shown in Fig. 2. ( † )Computed from the FWHM of the [O I] λ5577.3 and λ6300.3 night skylines.
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