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We report on radio and X-ray observations of the only known repeating FastRadio Burst (FRB) source, FRB 121102. We have detected six additional radiobursts from this source: five with the Green Bank Telescope at 2 GHz, and oneat 1.4 GHz at the Arecibo Observatory for a total of 17 bursts from thissource. All have dispersion measures consistent with a single value ($\sim559$pc cm$^{-3}$) that is three times the predicted maximum Galactic value. The2-GHz bursts have highly variable spectra like those at 1.4 GHz, indicatingthat the frequency structure seen across the individual 1.4 and 2-GHzbandpasses is part of a wideband process. X-ray observations of the FRB 121102field with the Swift and Chandra observatories show at least one possiblecounterpart; however, the probability of chance superposition is high. A radioimaging observation of the field with the Jansky Very Large Array at 1.6 GHzyields a 5$\sigma$ upper limit of 0.3 mJy on any point-source continuumemission. This upper limit, combined with archival WISE 22-$\mu$m and IPHASH$\alpha$ surveys, rules out the presence of an intervening Galactic HIIregion. We update our estimate of the FRB detection rate in the PALFA survey tobe 1.1$^{+3.7}_{-1.0} \times 10^4$ FRBs sky$^{-1}$ day$^{-1}$ (95% confidence)for peak flux density at 1.4 GHz above 300 mJy. We find that the intrinsicwidths of the 12 FRB 121102 bursts from Arecibo are, on average, significantlylonger than the intrinsic widths of the 13 single-component FRBs detected withthe Parkes telescope.

The repeating Fast Radio Burst FRB 121102: Multi-wavelength observations and additional bursts