  We present a method to identify type-1 active galactic nuclei (AGN) in the
central 3 arcsec integrated spectra of galaxies in the MaNGA DR15 sample. It is
based on flux ratios estimates in spectral bands flanking the expected
H$\alpha$ broad component H$\alpha_{BC}$. The high signal-to-noise ratio
obtained (mean S/N = 84) permits the identification of H$\alpha_{BC}$ without
prior subtraction of the host galaxy (HG) stellar component. A final sample of
47 type-1 AGN is reported out of 4700 galaxies at $z$ < 0.15. The results were
compared with those from other methods based on the SDSS DR7 and MaNGA data.
Detection of type-1 AGN in those works compared to our method goes from 26% to
81%. Spectral indexes were used to classify the type-1 AGN spectra according to
different levels of AGN-HG contribution, finding 9 AGN-dominated, 14
intermediate, and 24 HG-dominated objects. Complementary data in NIR-MIR
allowed us to identify type I AGN-dominated objects as blue and HG-dominated as
red in the WISE colors. From NVSS and FIRST radio continuum data, we identify 5
HERGs (high-excitation radio galaxies) and 4 LERGs (low-excitation radio
galaxies), three showing evidence of radio-jets in the FIRST maps. Additional
X-ray data from ROSAT allowed us to build [OIII] and H$\alpha_{BC}$ versus
X-ray, NIR-MIR, and radio continuum diagrams, showing that L(H$\alpha_{BC}$)
and L([OIII]) provide good correlations. The range in H$\alpha_{BC}$ luminosity
is wide 38 < logL(H$\alpha_{BC}$) < 44, with log FWHM(H$\alpha_{BC}$)$\sim$
3-4, covering a range of Eddington ratios of -5.15 < log L$_{bol}$/L$_{edd}$ <
0.70. Finally, we also identify and report ten possible changing-look AGN
candidates.
