Table 1.
Instruments participating to the MWL campaign on B2 1811+31 during the 2020 γ-ray flare.
| Instrument | Sensitivity range | MJD start | MJD stop | |
|---|---|---|---|---|
| MAGIC | 20 GeV−100 TeV | 59127 | 59133 | |
| Fermi-LAT | 30 MeV−1 TeV | 58940 | 59190 | |
| Swift-XRT | 0.2−10 keV | 59125 | 59158 | |
| Swift-UVOT | v, b, u, w1, m2, w2 | 59125 | 59158 | |
| (≈190−600 nm) | ||||
| ZTF | g, r, i | 59111 | 59180 | |
| (≈400−800 nm) | ||||
| Würzburg, Siena | R | 59126 | 59174 | |
| (≈520−800 nm) | ||||
| TELAMON | 14−25 GHz | 59141 | 59166 | |
| OVRO | 15 GHz | 59169 | 59177 |
Notes. For the optical and UV telescopes, the photometric filters employed in this study are reported. Fermi-LAT detected the high state on October 1, 2020 (MJD 59123). Since LAT operates in sky survey mode, we report MJD start and stop times corresponding approximately to the beginning and end of the 2020 γ-ray flare (Figure 1). For all the other instruments, the MJD start and stop refer to the observations carried out in the MJD 59100−59180 period (Figure 3).
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