Detection of a double-peaked H$\alpha$ component from the accretion disc
  of NGC 4958
  Active Galactic Nuclei are objects associated with the presence of an
accretion disc around supermassive black holes found in the very central region
of galaxies with a well-defined bulge. In the optical range of the spectrum, a
possible signature of the accretion disc is the presence of a broad
double-peaked component that is mostly seen in H$\alpha$. In this paper, we
report the detection of a double-peaked feature in the H$\alpha$ line in the
nucleus of the galaxy NGC 4958. The narrow line region of this object has an
emission that is typical of a LINER galaxy, which is the usual classification
for double-peaked emitters. A central broad component, related to the broad
line region (BLR) of this object, is seen in H$\alpha$ and also in H$\beta$. We
concluded that the double-peaked emission is emitted by a circular relativistic
Keplerian disc with an inner radius $\xi_{\rm i}$ = 570$\pm$ 83, an outer
radius $\xi_{\rm o}$ = 860$\pm$170 (both in units of $GM_{\rm SMBH}/c^2$), an
inclination to the line of sight $i$ = 27.2$^o \pm$0.7$^o$ and a local
broadening parameter $\sigma$ = 1310$\pm$70 km s$^{-1}$.
