summary - Zeeman spectropolarimetric survey of 61 southern hydrogen-rich (DA) white dwarfs searching for magnetic fields, aiming to characterize the field-strength distribution among white dwarfs and identify weak-field or field-free examples. Supplies the magnetic-field measurements (combined with mass/age data from companion surveys) for several of the specific named white dwarfs - e.g. WD1022-301, WD1724-359, WD0652-563, WD1236-495 - that Giddings & Mangano 2008 select for their white-dwarf survival bound, which requires low magnetic field (below a few x10^5 G, to avoid magnetic screening of incoming cosmic rays) combined with high mass and known old age.
relevance_note - The primary observational dataset (not itself part of Giddings-Mangano’s own analysis) supplying the magnetic-field measurements for the specific white dwarfs the slow-black-hole survival bound depends on; reached in one hop by mining Giddings & Mangano’s reference list.