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Table 2
Hi observations and the combined data cube.
| Date | December 2009 | May 2004 | |
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| Array | D | C | CD |
| Duration | 9h | 8.5h | 17.5h |
| Bandwidth | 3.125 MHz | 3.125 MHz | 3.125 MHz |
| Number of channels | 128 | 64 | 64 |
| Central velocitya | 412 km s-1 | 412 km s-1 | 412 km s-1 |
| Velocity resolution | 5.16 km s-1 | 10.30 km s-1 | 10.30 km s-1 |
| FWHP restoring beam | 61′′ × 51′′ | 19′′ × 18′′ | 21′′ × 20′′ |
| rms noise in channel maps | 1.0 mJy/beam | 0.4 mJy/beam | 0.3 mJy/beam |
| Equivalent Hi column density | 2 × 1018 cm-2 | 1.3 × 1019 cm-2 | 8 × 1018 cm-2 |
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