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Table 3
Detected species in the coma of comet C/2016 R2.
| Species | Detected bands | Respective band/line wavelengths |
|---|---|---|
| CO+ | (6,0), (7,1), (5,0), (4,0), (3,0), (2,0), (4,2), (1,0), (2,1), (3,2), (0,0), (1,1), (0,1), (1,2), (0,2) A2Π−X2Σ bands | 341, 351, 359, 378, 400, 425, 452, 454, 468, 484, 490, 504, 547, 567, and 619 nm |
 |
(0,0), (1,1), (0,1)  bands and a few matching lines for the (0,2) band |
391, 389, 428, and 471 nm |
 |
(0,0,0)  , (0,0,0) |
|
the (0,0,0)  , and the (0,0,0)  bands |
351, 350, 366, and 366 nm | |
| CH+ | Tentative detection of the (0,0) A1Π−X1Σ+ band | 423 nm |
| CH | (0,0) A2Δ−X2Π band and tentative detection of the (0,0) B2Σ−−X2Π band | 431 and 389 nm |
| CN | (0,0),(1,0) B2Σ+−X2Σ+ bands and tentative detection of the (1,1) band | 388, 422, and 388 nm |
| C2 | (0,0) d3Πg−A3Πu band bandhead (Swan System) | 517 nm |
| C3 | (0,0,0)–(0,0,0) and (0,2,0)–(0,0,0) bands and tentative detection of the (0,0,0)–(0,2,0)  band |
405, 392, and 407 nm |
| [OI] | Three forbidden oxygen lines | 557.7339, 630.0304, and 636.3776 nm |
| [NI] | Two forbidden nitrogen lines | 519.7900 and 520.0256 nm |
| [CI] | Three forbidden carbon lines | 872.712, 982.411, and 985.024 nm |
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