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Fig. 1

image

Five epochs of I-band spectroscopy of #505. The dates of individual observations are associated with the relevant spectra. Prominent transitions are indicated; note that Paschen 13, 15 and 16 are located in the blue wings of the Ca ii absorption lines while the blend at 8514 Å is dominated by Fe i. Each spectrum has been wavelength corrected to take into account the mean cluster velocity of VdBH222 of ~–99 km s-1. We highlight the relative weakness of the rich, low-excitation, metallic photospheric lines and greater widths of the Ca ii transitions in the spectrum obtained on August 15 in comparison to the remaining spectra.

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