Detecting cold H2globules in the outer Galactic disc by microlensing towards the Maffei 1 elliptical(Corrigendum)

Abstract

Figure 3 in the original paper is wrong. A typing error in the source program caused the cosinus of Galactic longitude being set to zero whatever the sky direction. The present erratum provides the correct version of this figure. Consequently, the estimated microlensing optical depth of H2 globule cores towards the Maffei 1 galaxy reduces to τ ∼ 0.3 × 10−6 (instead of ∼0.7 × 10−6 originally) and all the detection rate predictions towards this galaxy inferred in Sect. 5 (including the curves in Fig. 6 and the column ∫ NdetdΩ in Table 2) must be rescaled by a multiplication factor ∼3/7, i.e. roughly divided by 2. The rest of the paper remains unchanged.