SIMBAD references

In this paper, we give the spectral energy distributions (SEDs) of 42 M81 globular clusters in 13 intermediate-band filters from 4000 to 10000 Å using the CCD images of M81, observed as part of the Beijing-Arizona-Taiwan-Connecticut (BATC) Multicolor Sky Survey. The BATC multicolor filter system is specifically designed to exclude most of the bright and variable night-sky emission lines, including the OH forest. Hence, it can present accurate SEDs of the observed objects. These SEDs are low-resolution spectra and can reflect the stellar populations of the globular clusters. This paper confirms the conclusions of Schroder et al., that M81 contains clusters as young as a few Gyr, which were also observed in both M31 and M33.