Title: A UV Resonance Line Echo from a Shell Around a Hydrogen-Poor
    Superluminous Supernova
Authors: R. Lunnan, C. Fransson, P. M. Vreeswijk, S. E. Woosley, G. Leloudas,
    D. A. Perley, R. M. Quimby, Lin Yan, N. Blagorodnova, B. D. Bue,
    S. B. Cenko, A. De Cia, D. O. Cook, C. U. Fremling, P. Gatkine, A. Gal-Yam,
    M. M. Kasliwal, S. R. Kulkarni, F. J. Masci, P. E. Nugent, A. Nyholm,
    A. Rubin, N. Suzuki, and P. Wozniak
Table: Emission Line Properties
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Byte-by-byte Description
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   Bytes Format Units        Label     Explanations
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   1-  7 F7.1   d            MJD       Modified Julian Date of observation,
                                        JD-2400000.5
   9- 13 F5.1   d            Phase     Rest-frame Phase
  15- 21 F7.2   0.1nm        centroid  Rest-frame line centroid in AA
  23- 26 F4.2   0.1nm      e_centroid  ?="" Uncertainty in centroid
  28- 31 F4.1   0.1nm        fwhm      Rest-frame line full-width half maximum in AA
  33- 35 F3.1   0.1nm      e_fwhm      ?="" Uncertainty in fwhm
  37- 37 A1     ---        l_flux      Limit flag on flux
  38- 41 F4.2   10-16mW/m2   flux      Line flux in 10^-16 erg/s/cm^2
  43- 46 F4.2   10-16mW/m2 e_flux      ?="" Uncertainty in flux
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57513.4 100.1 2785.41 0.85 13.7 2.0  1.89 0.37
57546.3 123.2 2790.59 0.76 15.7 1.8  1.42 0.22
57549.4 125.3 2787.48 0.73 12.0 1.7  1.17 0.23
57575.3 143.5 2793.11 0.67 16.6 1.5  1.24 0.16
57755.6 269.8 2820.50 0.24 13.7 0.6  2.02 0.11
57811.5 309.0 2825.24 0.29 12.5 0.7  1.03 0.07
57841.4 329.9 2827.56 1.64 14.4 4.0  0.49 0.17
57872.4 351.7                       >0.28