A soft-spectrum PULX candidate is reported in Cen A but XMM-SAS randomisation during data reduction renders the marginal 1.27 Hz pulsation detection unreliable across repeated reductions.
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2026 3representative citing papers
Candidate 0.22 Hz X-ray pulsations detected in NGC7456 ULX-1 with evidence of spin-up, pointing to an accreting neutron star.
Comparative analysis reveals a potential separate population of ULXs in spiral galaxies with single occurrences, featuring both soft and hard sources, while highlighting globular cluster links in elliptical galaxies.
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Significant or Not? The Impact of Randomisation During Data Reduction on Confirming a New Pulsating Ultraluminous X-ray Source Candidate in Centaurus A
A soft-spectrum PULX candidate is reported in Cen A but XMM-SAS randomisation during data reduction renders the marginal 1.27 Hz pulsation detection unreliable across repeated reductions.