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We estimate an expansion rate of 0.025%\\pm0.006%yr^{-1} and a blast-wave velocity of 1.61\\pm0.37\\times10^3 km s^{-1}. Assuming partial electron-ion equilibration via Coulomb collisions and cooling due to adiabatic expansion, this velocity implies a postshock electron temperature of 0.84\\pm0.20 keV which is consistent with the estimate of 0.68\\pm0.05 keV based on the X-r"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1902.08456","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-02-22T12:12:00Z","cross_cats_sorted":[],"title_canon_sha256":"674d600ffb6d8302d8fbd74b537d18cca4c0c93f160ce3da428073fe58f05d58","abstract_canon_sha256":"55110bfa720eb17d5775b306e6a3156bfd0e1693f9ec4043b87efc61643e1ca9"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:50:19.175496Z","signature_b64":"W3loLhGZVRndkd/XBlBcIrWPYBH2ZLUCJ5rhOb2X6uITnKJY0lr0jXDt8N31/poLPHCe4rycJB+fyT/3nOCiDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"70b8e61124c73b3a6ef9d8fa7840ec116eb4d3ce10bd966012fae11bb38710b3","last_reissued_at":"2026-05-17T23:50:19.174683Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:50:19.174683Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Expansion of the Forward Shock of 1E 0102.2-7219 in X-rays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Daniel J. 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