Sequence of UVES spectra taken for LMC 2009a. Time increase from top to bottom and the numbers on the right side of each spectrum indicates the spectrum age in days after maximum/discovery. Spectra have been smoothed with a running boxcar of 33 and shifted vertically for clarity. In the top panel spectrum 8 has been offset by 2.5e-14 erg s cm²/Å  and spectrum 15 by 2.5e–14 erg s cm²/Å. In the bottom panel spectrum 44 has been offset by 0.9e-14 erg s cm²/Å  and spectrum 54 by 0.3e-14 erg s cm²/Å. The spectra are flux calibrated and corrected for interstellar galactic reddening as explained in the text.