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Table 1
Measurements of the peak position velocities (blue, central, red) from month-averaged Hα and Hβ profiles.
| Hα | Hβ | |||||||||
| Year | Month | blue | central | red | Vred − Vblue | Month | blue | central | red | Vred − Vblue |
| [km s-1] | [km s-1] | [km s-1] | [km s-1] | [km s-1] | [km s-1] | [km s-1] | [km s-1] | |||
| 1996 | Mar. | –3520 ± 39 | 96 ± 115 | 3840 ± 35 | 7360 ± 74 | Feb.–Mar. | –3269 ± 136 | –216 ± 131 | 3773 ± 16 | 7042 ± 152 |
| 1996 | Jul. | –3411 ± 8 | –457 ± 100 | 4056 ± 35 | 7467 ± 43 | Jun.–Aug. | –3123 ± 177 | –595 ± 7 | 3422 ± 346 | 6546 ± 523 |
| 1998 | Feb. | –3390 ± 100 | 2639 ± 71 | – | – | May–Jun. | –2977 ± 112 | 2575 ± 718 | – | – |
| 1998 | Jul.–Sep. | –3378 ± 7 | 3104 ± 35 | – | – | Jul. | –3226 ± 74 | 3057 ± 202 | – | – |
| 1998 | Dec. | –3433 ± 22 | 2726 ± 71 | – | – | Oct.–Dec. | –3591 ± 177 | 2283 ± 387 | 6359 ± 162 | 9950 ± 340 |
| 1999 | Sep. | –3465 ± 116 | 1914 ± 56 | 5896 ± 180 | 9361 ± 296 | Aug.–Oct. | –3708 ± 94 | 1830 ± 201 | 6783 ± 24 | 10491 ± 118 |
| 2000 | Jul. | –3747 ± 23 | 2649 ± 117 | 5063 ± 133 | 8810 ± 156 | Jul.–Nov. | –3854 ± 30 | 1713 ± 35 | 5599 ± 87 | 9453 ± 116 |
| 2001 | Jan. | –3660 ± 24 | 1665 ± 21 | 4803 ± 11 | 8463 ± 35 | Jan.–Mar. | –3942 ± 12 | 1874 ± 56 | 5453 ± 128 | 9395 ± 140 |
| 2001 | May–Jun. | –3714 ± 53 | 2682 ± 112 | 5182 ± 88 | 8896 ± 141 | May–Jun. | –3693 ± 8 | 2429 ± 98 | 5673 ± 107 | 9366 ± 115 |
| 2001 | Oct. | –3693 ± 22 | 2390 ± 66 | 4803 ± 72 | 8496 ± 94 | Oct.–Nov. | –3357 ± 12 | 2116 ± 151 | – | – |
| 2002 | Feb.–Mar. | –3389 ± 100 | 1881 ± 41 | 4750 ± 26 | 8139 ± 126 | Feb.–Apr. | –2977 ± 29 | 2298 ± 36 | – | – |
| 2002 | Jun.–Jul. | –3313 ± 84 | 2098 ± 21 | 4662 ± 96 | 7975 ± 181 | Jun. | –3138 ± 198 | 2137 ± 67 | – | – |
| 2002 | Oct.–Nov. | –3443 ± 99 | 1892 ± 36 | 4619 ± 35 | 8062 ± 134 | Oct.–Dec. | –3372 ± 33 | 2020 ± 15 | 5176 ± 17 | 8548 ± 50 |
| 2003 | May | –3649 ± 23 | 1899 ± 95 | 4695 ± 19 | 8344 ± 42 | May–Jun. | –3810 ± 8 | 2049 ± 139 | 5001 ± 100 | 8811 ± 108 |
| 2003 | Sep.–Oct. | –3649 ± 23 | 1773 ± 71 | 4652 ± 19 | 8301 ± 42 | Sep.–Oct. | –3591 ± 94 | 1727 ± 97 | 4358 ± 16 | 7948 ± 111 |
| 2004 | Mar.–Aug. | –3584 ± 8 | 2487 ± 82 | 4500 ± 11 | 8085 ± 19 | Mar.–Jun. | –3489 ± 50 | 2575 ± 25 | 4357 ± 99 | 7846 ± 149 |
| 2004 | Dec. | –3433 ± 39 | 2833 ± 70 | 4740 ± 109 | 8173 ± 147 | Dec. | –3007 ± 12 | 2678 ± 5 | 4767 ± 182 | 7773 ± 194 |
| 2005 | Apr. | –3563 ± 22 | 2801 ± 35 | 4533 ± 35 | 8095 ± 57 | Apr.–Jun. | –3170 ± 12 | 2502 ± 6 | – | – |
| 2007 | Jan. | –3682 ± 7 | 1643 ± 113 | – | – | Jan.–Feb. | –3591 ± 12 | 1961 ± 68 | – | – |
| 2007 | Feb. | –3703 ± 24 | 1329 ± 37 | – | – | May–Jun. | –3708 ± 12 | 1800 ± 6 | – | – |
| 2007 | Aug.–Nov. | –3800 ± 8 | 1470 ± 297 | – | – | Aug.–Nov. | –3781 ± 32 | 1713 ± 130 | – | – |
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