Table B.1.
Highly magnetized accreting NSs during bright X-ray luminosity states, along with their respective net exposure times for the SPI data, and the highest 3σ upper limits in the ranges 1−2.2 MeV (for a redshifted 2.2 MeV line) and 200-800 keV (for a 511 keV line), assuming different values of FWHM.
| Source name | net exposure | Lxa | distanceb | 3σ u.l. 2.2 MeV line | 3σ u.l. 511 keV line | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (ks) | (erg s−1) | (kpc) | 10−4ph cm−2 s−1 | 10−3ph cm−2 s−1 | ||||||||
| FWHM: | 10 | 20 | 40 | 100 | FWHM: | 10 | 20 | 40 | ||||
| (keV) | (keV) | |||||||||||
| A 0535+26 | 393 | 2.4 × 1037 | 1.8 ± 0.1 | 1.2 | 1.4 | 1.5 | 2.4 | 1.5 | 1.4 | 1.8 | ||
| V 0332+53 | 596 | 3 × 1037 | 5.6 ± 0.7 | 5.8 | 6.5 | 8.5 | 8.6 | 0.5 | 0.7 | 0.9 | ||
| GX 304−1 | 122 | 6.2 × 1036 | 1.86 ± 0.04 | 17 | 23 | 32 | 45 | 2.4 | 3.1 | 3.2 | ||
| Swift J0243.6+6124 | 159 | 9.8 × 1037 | 5.2 ± 0.3 | 11 | 12 | 16 | 22 | 1.8 | 2.1 | 2.6 | ||
| RX J0440.9+4431 | 255 | 5 × 1037 |
 |
11 | 15 | 17 | 32 | 1.7 | 2.0 | 2.4 | ||
Notes. a X-ray luminosity, in the energy range 0.1–100 keV.
b distances from Bailer-Jones et al. (2021).
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