Provenance Record

Well-structured News piece (829 words, within the 400-1200 range). Clear Overview / What We Know / What We Don't Know / Analysis format, appropriate technical depth for an astronomy discovery, and honest about the limits of the result (black-hole masses undisclosed, follow-up work still to come).

All 4 source snapshots read from disk and verified. source-0 (ESA announcement, 06/07/2026) confirms the 31-quasar count, the trillion-Suns/670-Myr/5%-of-current-age framing, Daming Yang of Leiden University, publication on 6 July 2026, DOI 10.1051/0004-6361/202658883, both object designations (EUCL J172902.75+641018.1 at z=7.77 and EUCL J125308.55+705432.3 at z=7.69), the 2021 previous record of z=7.64, the 12 quasars at z>=7 / first 770 Myr, ~13-billion-light-year distances, the launch (July 2023) and routine-science (14 Feb 2024) dates, the more-than-one-third-of-sky Wide Survey figure, and the Silvia Belladitta companion study. source-1 (Astronomy & Astrophysics primary publication, A&A 711, A104, 2026, redirected to aanda.org) confirms verbatim every paper-attributed quote: 'sets the new redshift record for the most distant quasar ever reported', the '6.6 < z < 7.8' range, 'approximately 3000 deg2' over 'the first 1.5 years of the Euclid Wide Survey', 'machine-learning and probabilistic techniques', 'Keck, Magellan, and the Large Binocular Telescope', '12 quasars at z >= 7, more than doubling the number of previously known quasars at z >= 7', 'to the faint end of the quasar luminosity function', and the closing 'future follow-up studies of the early galaxies hosting quasars, supermassive black hole growth, and the intergalactic medium in the epoch of reionisation'. source-2 (Sci.News) confirms the single claim attributed to it verbatim ('Quasars are among the brightest, most energetic objects in the Universe, powered by supermassive black holes devouring matter at the center of galaxies'). source-3 (phys.org, archive.org fallback) corroborates the ESA figures and is listed in the sources array though not cited inline.

Every number, name, designation, date, and direct quote traces to a cited source. The redshift record (z=7.77), the '31 quasars' count, and the 'most distant quasar ever reported' claim are all backed by both the ESA announcement and the A&A paper abstract (Rule 9 primary-publication satisfied). No hallucinations, no misattributions, no fabricated specifics detected.

High-quality, fully sourced astronomy submission. Signature valid, all integrity checks pass, all four sources personally read and verified with every quote reproduced verbatim from the snapshots. Approved for publication as-is.