Table 5.
Total flux density measurements and spectral indices of the total emission of 21 remnant candidates.
| Source name | Stotal; 150 MHz | Stotal; 325MHz | Stotal; 1400MHz | Stotal; 6000 MHz |
 |
 |
 |
|---|---|---|---|---|---|---|---|
| (LOFAR18) [mJy] | (GMRT)[mJy] | (NVSS) [mJy] | [mJy] | ||||
| J102818+560811 | 54 ± 6 | 32 ± 3 | 9.3 ± 0.5 | 3.2 ± 0.2 | 0.79 ± 0.05 | 0.73 ± 0.05 | 0.77 ± 0.03 |
| J102842+575122 | 33 ± 4 | – | < 2.31 | < 0.192 | > 1.19 | – | > 1.39* |
| J102905+585721 | 31 ± 4 | – | < 1.92 | < 0.014 | > 1.25* | – | > 2.10* |
| J103132+591549 | 121 ± 13 | 47 ± 4 | 8.0 ± 0.4 | – | 1.22 ± 0.05* | – | – |
| J103602+554007 | 30 ± 3 | 11.8 ± 0.9 | < 3.01 | – | > 1.04 | – | – |
| J103641+593702 | 36 ± 4 | 13 ± 1 | < 2.61 | 0.98 ± 0.05 | > 1.17 | < 0.68 | 0.98 ± 0.03 |
| J103805+601150 | 190 ± 21 | 73 ± 6 | 25 ± 1 | – | 0.91 ± 0.05 | – | – |
| J104208+592030 | 172 ± 19 | 48 ± 4 | 12.5 ± 0.6 | – | 1.17 ± 0.05 | – | – |
| J104516+563148 | 18 ± 2 | 7.2 ± 0.6 | 2.5 ± 0.1 | 1.41 ± 0.07 | 0.88 ± 0.05 | 0.39 ± 0.05 | 0.69 ± 0.03 |
| J104646+564744 | 770 ± 80 | 325 ± 26 | 93 ± 5 | – | 0.94 ± 0.05 | – | – |
| J104732+555007 | 89 ± 10 | 27 ± 2 | 4.5 ± 0.2 | 1.63 ± 0.08 | 1.34 ± 0.05* | 0.69 ± 0.05 | 1.08 ± 0.03 |
| J105230+563602 | 195 ± 21 | 74 ± 6 | 28 ± 1 | 6.3 ± 0.3 | 0.87 ± 0.05 | 1.02 ± 0.05 | 0.93 ± 0.03 |
| J105402+550554 | 49 ± 5 | – | 3.3 ± 0.2 | 0.75 ± 0.04 | 1.21 ± 0.05* | 1.01 ± 0.05 | 1.13 ± 0.03 |
| J105554+563532 | 88 ± 10 | 22 ± 2 | 1.79 ± 0.09 | – | 1.75 ± 0.05* | – | – |
| J105703+584721 | 1581 ± 170 | 650 ± 50 | 200 ± 10 | – | 0.93 ± 0.05 | – | – |
| J105729+591128 | 9 ± 1 | 3.3 ± 0.3 | < 0.86WSRT | 0.189 ± 0.009 | > 1.04 | < 1.04 | 1.04 ± 0.03 |
| J110108+560330 | 114 ± 13 | 34 ± 3 | 2.5 ± 0.1 | – | 1.71 ± 0.05* | – | – |
| J110136+592602 | 13 ± 2 | 5.3 ± 0.4 | 2.0 ± 0.1 | – | 0.85 ± 0.05 | – | – |
| J110255+585740 | 99 ± 11 | 31 ± 3 | < 3.84 | – | > 1.46* | – | – |
| J110420+585409 | 236 ± 26 | 103 ± 8 | 34 ± 2 | – | 0.86 ± 0.05 | – | – |
| J110806+583144 | 27 ± 3 | 13 ± 1 | 2.9 ± 0.1 | 0.66 ± 0.03 | 1.00 ± 0.05 | 1.02 ± 0.05 | 1.01 ± 0.03 |
Notes. In Col. 1 are the source names in J2000 coordinates; Cols. 2–5 are total flux densities measured directly from images at 150, 325, 1400 and 6000 MHz, respectively; Cols. 6–8 are the spectral indices of the total emission calculated between 150 and 1400 MHz, 1400 and 6000 MHz, and 150 and 6000 MHz, respectively. Mark ‘–’ indicates unreliable measurements, and mark ‘*’ indicates USS values. Flux densities are measured inside 3 × σ150 MHz; 18″ contours from all of the images except for the NVSS image at 1400 MHz, where due to the low resolution of the image, we used 3 × σlocal. Total flux density at 1400 MHz is measured directly from the NVSS image for all the sources except for the source J1057+5911. The measurement of the flux density for this source from the WSRT image provides a tighter constraint and is noted with ‘WSRT’.
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