IRIS burst properties in active regions

Interface Region Imaging Spectrograph (IRIS) bursts are localised features thought to be driven by magnetic reconnection. Although these events well-studied, it remains unknown whether their properties vary as host active regions (ARs) evolve. Here, we aim understand the measurable of IRIS consistent during evolution ARs. We study 42 dense 400-step rasters sampled IRIS. These each covered one seven ARs, with AR being at least four times over a minimum 48 hours. An automated detection algorithm is used identify burst profiles. Data from Solar Dynamics Observatory's Helioseismic and Magnetic Imager also provide context about co-spatial line-of-sight field. Of studied, 36 were found contain Five ARs (11850, 11909, 11916, 12104, 12139) contained profiles in raster that them whilst (11871) was no such spectra any time. A total 4019 belonging 752 connected objects, which define parent bursts, identified. only detected within compact raster, appearing increase size aged. No systematic changes frequency or spectral characteristic through time for Finally, 93 % areas between 1 arcsec^2 4 occurred bi-poles photosphere. Overall, have remarkably spatial throughout predominantly form cores larger more complex containing region itself evolves.