Table A.2
Integrated flux densities compiled for the SNR G18.8+0.3, used to trace the spectrum presented in Fig. 3b.
| G18.8+0.3 (Kes 67) | ||
|---|---|---|
| Frequency | Scaled flux | Reference |
| [MHz] | density [Jy] | |
| 30.9 | 87.4 ± 17.5 * | Kassim (1988) |
| 57.5 | 73.9 ± 8.2 | Odegard (1986) |
| 74 | 76.2 ± 13.8 | This work (from VLSSr) |
| 80 | 84.1 ± 11.8 | Slee & Higgins (1973) |
| 80 | 66.9 ± 19.1 | Dulk & Slee (1972) |
| 83 | 86.5 ± 19.9 | Kovalenko et al. (1994a) |
| 88 | 81 ± 17 | This work (from GLEAM) |
| 111 | 78.8 ± 19.7 | Kovalenko et al. (1994a) |
| 118 | 80 ± 14 | This work (from GLEAM) |
| 155 | 71 ± 11 | This work (from GLEAM) |
| 160 | 67.7 ± 10.1 | Dulk & Slee (1975) |
| 200 | 62 ± 9 | This work (from GLEAM) |
| 330 | 50.8 ± 7.6 | Kassim (1992) |
| 408 | 38.9 ± 5.8 | Kesteven (1968) |
| 408 | 49.2 ± 7.4 | Kassim (1989b) |
| 960 | 28.3 ± 0.3 | Trushkin (1998) |
| 1000 | 35.0 ± 5.3 † | Milne (1970) |
| 1465 | 29.7 ± 0.3 | Dubner et al. (1996) |
| 2695 | 18.9 ± 1.9 | Altenhoff et al. (1970) |
| 2700 | 22.3 ± 3.3 | Milne & Dickel (1974) |
| 3650 | 17.4 ± 0.3 | Trushkin (1998) |
| 3900 | 18.3 ± 0.3 | Trushkin (1998) |
| 4800 | 15.1 ± 0.9 | Sun et al. (2011) |
| 5000 | 17.9 ± 3.6 | Milne & Dickel (1975) |
| 5000 | 14.6 ± 2.2 | Milne (1969) |
| 5000 | 13.1 ± 2.6 | Reifenstein et al. (1970) |
| 8400 | 12.9 ± 1.0 † | Milne et al. (1989) |
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.
(*) No correction to Perley & Butler (2017) was applied because the measurement is out of the 50 MHz-50 GHz frequency range where their scale is valid.
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