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Table 1
Evaluated fractional rms (Eq. (1)), doubling timescales (Eq. (2)), and average energy fluxes in B and R filters for PKS 2155−304 in different epochs during the period 2007−2009.
| Year | Fvar(B) | Fvar(R) |
|
|
⟨ [ νFν ] B ⟩ | ⟨ [ νFν ] R ⟩ |
| [day] | [day] | [× 10-10 erg cm-2 s-1] | [× 10-10 erg cm-2 s-1] | |||
|
|
||||||
| 2007(1) | 0.188 ± 0.015 | 0.166 ± 0.015 | 3.37 ± 0.10 | 3.97 ± 0.17 | 2.12 ± 0.40 | 1.93 ± 0.33 |
| 2007(2) | 0.117 ± 0.016 | 0.127 ± 0.017 | 5.65 ± 1.00 | 7.63 ± 0.57 | 1.50 ± 0.18 | 1.30 ± 0.17 |
| 2008 | 0.288 ± 0.018 | 0.278 ± 0.017 | 6.48 ± 0.64 | 7.51 ± 0.28 | 1.51 ± 0.44 | 1.28 ± 0.37 |
| 2009 | 0.327 ± 0.018 | 0.308 ± 0.016 | 4.43 ± 0.46 | 5.16 ± 0.36 | 1.05 ± 0.34 | 0.88 ± 0.29 |
Notes. The meaning of and can be found in Sect. 3.3.
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