Table 2
Characteristics of the maser flares of persistent features inferred from the long-term monitoring.
| Transition | V | S | R | FWHM | Rrd | τ |
|---|---|---|---|---|---|---|
| (km s−1) | (Jy) | (days) | (days) | |||
| CH3OH 6.7 GHz | −16.78 | 0.61 | >6.00 | 2.99 (0.82) | 1.22 (0.39) | −2.09 (0.51) |
| −16.21 | 0.26 | >2.10 | 3.10 (0.68) | 1.16 (0.32) | −1.94 (0.52) | |
| −15.60 | 0.97 | >7.34 | 5.03 (1.05) | 0.80 (0.23) | 3.67 (0.28) | |
| −14.85 | 0.17 | >0.94 | 5.03 (1.03) | 0.80 (0.20) | 1.43 (0.39) | |
| −13.75 | 0.17 | >1.38 | 4.08 (0.62) | 0.88 (0.16) | 2.95 (0.25) | |
| −11.03 | 1.18 | >4.70 | 5.82 (1.33) | 1.0 (0.43) | 1.58 (0.19) | |
| −9.23 | 4.42 | >31.29 | 3.78 (0.71) | 0.89 (0.24) | −0.11 (0.22) | |
| −8.62 | 4.16 | >19.77 | 4.73 (1.20) | 0.70 (0.26) | −1.93 (0.27) | |
| −7.43 | 16.60 | >105.81 | 4.10 (0.87) | 0.84 (0.22) | 0 | |
| OH 1.665 GHz | −12.22 | 1.65 | >2.39 | 9.46 (0.60) | 0.67 (0.35) | 1.90 (0.53) |
| −10.03 | 0.44 | >5.94 | 10.83 (1.06) | 0.54 (0.15) | 2.91 (0.44) | |
| OH 1.667 GHz | −14.00 | 0.65 | >1.41 | 9.87 (1.94) | 0.77 (0.38) | −2.63 (0.53) |
| −9.62 | 0.32 | >1.25 | 11.10 (3.83) | 1.10 (0.50) | −1.02 (0.90) | |
| H2O 22 GHz | −18.83 | 42.00 | 22.49 (18.01) | 15.61 (2.32) | 1.29 (0.48) | −0.19 (0.41) |
| −16.40 | 218.60 | 146.51 (64.10) | 17.62 (1.49) | 1.19 (0.44) | 0 | |
| −7.85 | 36.59 | 18.70 (26.68) | 15.79 (1.86) | 1.15 (0.49) | −0.50 (0.64) | |
Notes. The quantity V is the peak velocity of the feature. Average values are given for the flux density (S), relative amplitude (R), timescale of flare (FWHM), ratio of the rise time to the decay time (Rrd), and time delay (τ). Delays for the methanol and water maser lines were calculated relative to the features −7.43 and −16.40 km s−1, respectively.
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