[11] In addition, IC 4528 contains broad emission lines with widths measuring Hβ FWHM ≤ 2000 km s−1 and is a type-1 active galactic nucleus (AGN) hosted inside a lower-luminosity galaxy that is found having a higher incidence of pseudo-bulges, with barred morphology, and considered less disturbed.

This suggests narrow-line Type 1 AGNs like in the case of IC 3528, experiences a more quiescent evolutionary history that is driven primarily by internal secular evolution rather than external dynamical perturbations.

Based on star formation rates derived from the FIR luminosities with the estimates based on the Hα line, they found the values obtained from these optical emission lines in IC 3528 are a factor of 10-70 (Hα) and 20-140 ([O II]) lower than the FIR estimates (50-300 Msolar yr−1).

[15] SN 2001Z, a Type II supernova was discovered in IC 3528[16][17] by astronomers Modjaz and Li, whom they saw it on an unfiltered image taken with KAIT on Mar.

They found the spectrum has a weak, relatively narrow H-alpha and H-beta emission lines on a strong, blue continuum and consistent with a type-II supernova caught at a very early epoch.