2 Observations

High resolution spectra in the wavelength range $\lambda\lambda$ 4800-6800 Å were obtained with the UVES spectrograph at the VLT UT2 telescope at ESO (Paranal).

Three exposures of 1.5 hours each for EROS-BLG-2000-5 were obtained on 2000 June 24-25.

The spectrum of the cool giant NGC 6528: I-2 was also observed with the same instrumentation and configuration.

With the standard configuration, a resolution of $R \sim 45\,000$ was achieved for a slit width of 1.0'' for EROS-BLG-2000-5 and $R \sim 55\,000$ for a slit of 0.8'' for NGC 6528: I-2. The log of observations is provided in Table 1. The S/N reported in Col. 3 refers to that measured per pixel of 0.017 ${\rm\AA}$.

The spectra were reduced using the UVES context of the MIDAS reduction package, including bias and inter-order background subtraction, flatfield correction, optimal extraction (with cosmic ray rejection) above the sky level and wavelength calibration (Balester et al. 2000).

 

Table 1: Log of observations carried out on 2000, June 24-25. Three exposures of 1.5 hours were obtained for EROS-BLG-2000-5 and two exposures of 1.5 hours for NGC 6528: I-2. Mean seeing values over the exposures are given.

Target	ST	Seeing ('')	Airmass	S/N
NGC 6528: I-2	00:04:17	1.3	1.9	50
	01:29:52	1.2	1.3	55
EROS-BLG-2000-5	03:01:11	1.1	1.1	20
	04:32:30	1.0	1.0	16
	06:10:56	1.1	1.1	16