Extended Data Fig. 1: eRO-QPE1 position and identification.
From: X-ray quasi-periodic eruptions from two previously quiescent galaxies
a, Legacy DR8 image cut-out around the optical counterpart of eRO-QPE1. Red and green circles represent the astrometry-corrected eROSITA and XMM-Newton EPIC-pn positions, respectively, with 1σ positional uncertainties. The EPIC-pn position was corrected excluding the target (blue cross) to ensure an unbiased estimate of the possible positional offset. Image reproduced from Legacy Surveys / D. Lang (Perimeter Institute) under a CC-BY-4.0 licence. b, SALT spectra of eRO-QPE1 shown in black and blue with related 1σ errors as shaded regions. The cyan spectrum represents a re-normalized sky spectrum to guide the eye for the residual sky feature around 5,577 Å.
