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Table 1.
Descriptions of the outburst phases.
| Outburst phase | Abbreviation | Description |
|---|---|---|
| Rising phase | RPh | The initial phase of the outburst, during which both X-ray and ONIR fluxes increase and the source becomes redder |
| Rising hard state | RHS | The period in the first ONIR flare, during the hard X-ray state, when the ONIR colors stabilize |
| Hard-to-soft transition | HtS | The short, about 5–10 d, transition to the soft state, over which the ONIR colors become bluer and X-ray spectra become softer |
| Soft state | SS | Period during the soft X-ray state when the ONIR spectra are dominated by the accretion disk emission |
| Soft-to-hard transition | StH | The short, about 10–20 d, period over which the ONIR colors become redder and the source departs from the soft X-ray state |
| Decaying hard state | DHS | The period within the second flare of about 20–30 d, when the ONIR colors are stable and red |
| Decaying phase | DPh | The period when ONIR fluxes decay toward the quiescence |
| Quiescence | Q | The period of low activity between the outbursts |
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