Table A.1
Integrated flux densities compiled for the SNR G4.5+6.8, used to trace the spectrum presented in Fig. 3a.
| G4.5+6.8 (Kepler) | ||
|---|---|---|
| Frequency | Scaled flux | Reference |
| [MHz] | density [Jy] | |
| 74 | 111 ± 17 | This work (from VLSSr) |
| 80 | 98.4 ± 9.6 | Dulk & Slee (1972) |
| 80 | 100.9 ± 30.3 | Slee (1977) |
| 80 | 93.6 ± 7.6 | Dulk & Slee (1975) |
| 83 | 104.4 ± 14.9 | Kovalenko et al. (1994a) |
| 86 | 110.0 ± 22.0 † | Mills et al. (1960) |
| 88 | 100.0 ± 9.0 | This work (from GLEAM) |
| 102 | 86.8 ± 12.8 | Kovalenko et al. (1994a) |
| 111 | 84.7 ± 12.8 | Kovalenko et al. (1994a) |
| 118 | 77.0 ± 7.0 | This work (from GLEAM) |
| 155 | 62.0 ± 9.0 | This work (from GLEAM) |
| 160 | 55.0 ± 16.5 | Slee (1977) |
| 408 | 42.6 ± 6.4 | Dulk & Slee (1972) |
| 635 | 26.2 ± 2.6 | Milne & Hill (1969) |
| 960 | 21.2 ± 2.9 | Harris (1962) |
| 960 | 18.8 ± 2.0 | Harris & Roberts (1960) |
| 960 | 21.2 ± 0.5 | Trushkin (1998) |
| 1000 | 20.0 ± 3.0 † | Milne (1970) |
| 1410 | 16.7 ± 1.7 | Milne & Hill (1969) |
| 1420 | 13.2 ± 1.6 | Lequeux (1962) |
| 2300 | 12.2 ± 0.3 | Trushkin (1998) |
| 2650 | 12.3 ± 1.2 | Milne & Hill (1969) |
| 2700 | 9.1 ± 0.9 | Milne & Dickel (1974) |
| 3900 | 8.0 ± 0.2 | Trushkin (1998) |
| 4850 | 6.4 ± 0.3 | Griffith et al. (1994) |
| 5000 | 6.6 ± 1.3 | Milne & Dickel (1975) |
| 5000 | 7.2 ± 1.1 | Dulk & Slee (1972) |
Notes. (†)No correction factor to bring the original flux density measurement to the scale of Perley & Butler (2017) was applied because no information on the flux density calibrators was found in the original publication.
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