Table 1.
Parameters of the Fermi-LAT analysis for the two novae.
| V1723 Sco | V6598 Sgr | |
|---|---|---|
| Optical nova position (°) | RA : 261.5755 | RA : 268.2054 |
| Dec : −38.1598 | Dec : −20.4042 | |
| glon : 350.0654 | glon : 8.1621 | |
| glat : −1.5882 | glat : 2.9835 | |
| 1-year analysis | ||
| 1-year period | 2023 Feb. 01 | 2022 Jul. 01 |
| 2024 Feb. 01 | 2023 Jul. 01 | |
| Time duration determination | ||
| Optical discovery (tdisc) | 2024 Feb. 08.827 | 2023 Jul. 15.459 |
| t0 | 2024 Feb. 09.0 | 2023 Jul. 15.0 |
| Optimal time period | t0 − t0 + 15 days | t0 − t0 + 2 days |
| Localization and spectral analysis | ||
| ΔTSreloc | 0.3 | 5.8 |
| Offset (°) | 0.03 | 0.22 |
| 95% containment radius (°) | 0.08 | 0.29 |
| Optimized position (°) | – | glon : 8.102 |
| glat : 2.784 | ||
| Best fit model | PLExpCutoff | LogParabola |
| TS | 216 | 24.5 |
| Flux (E > 100 MeV) (10−6 ph cm−2 s−1) | 1.1 |
0.05  |
| Γ | 1.5 ± 0.2 | – |
| ECutoff (GeV) | 1.6 ± 0.6 | – |
| α | – | −3.3 ± 1.8 |
| β | – | 1.9 ± 0.6 |
Notes. The optical novae positions are from Pearce et al. (2024) and Pearce et al. (2023) for V1723 Sco and V6598 Sgr respectively. The uncertainties on spectral parameters are 1σ statistical uncertainties. The spectral parameters presented are those of the best fit model for both novae (see text).
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