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Table 1.
Main characteristics of the C-band SRT observations on M 31.
| Telescope | SRT (64 m) |
| Receiver | C-band (5.7−7.7 GHz) |
| Backend | SARDARA |
| Spectroscopy | 16 384 channels |
| Backend bandwidth | 1.5 GHz |
| Channel spacing | 91.6 kHz |
| Observed frequency range | 6.0−7.25 MHz |
| Beam size | 2.9′ at 6.6 GHz |
| Polarization | Full stokes |
| Scanning strategy | Orthogonal raster subscans |
| Scanning speed | 6′ s−1 |
| Sample rate | 25 spectra s−1 |
| ⟨Tsys⟩ | 37 K |
| Map size | 2.4 deg × 3.1 deg ≃ 7.4 deg2 |
| Total number of scans | 22 RA + 22 Dec |
| Total observation time | 64 h |
| Reached sensitivity | 0.43 mJy beam−1 |
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