{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:QNIOEII3HNZKDNWTAKPTY2HEAN","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"0b88b1b40e95e33c37792912c09a7f27b230937f6203d44496b4b633f9b377b3","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-10-04T20:00:00Z","title_canon_sha256":"35595974197e27b3089096240549c32973dd2875187c54231b66d814411b34c4"},"schema_version":"1.0","source":{"id":"1210.1573","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.1573","created_at":"2026-05-18T01:54:05Z"},{"alias_kind":"arxiv_version","alias_value":"1210.1573v1","created_at":"2026-05-18T01:54:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.1573","created_at":"2026-05-18T01:54:05Z"},{"alias_kind":"pith_short_12","alias_value":"QNIOEII3HNZK","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"QNIOEII3HNZKDNWT","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"QNIOEII3","created_at":"2026-05-18T12:27:18Z"}],"graph_snapshots":[{"event_id":"sha256:509e302a660b42828586c4995d75d57a01039afd11332de6b38e68ffb15d89b6","target":"graph","created_at":"2026-05-18T01:54:05Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We present observations of the unusual optical transient SN 2010U, including spectra taken 1.03 days to 15.3 days after maximum light that identify it as a fast and luminous Fe II type nova. Our multi-band light curve traces the fast decline (t_2 = 3.5 days) from maximum light (M_V = -10.2 mag), placing SN 2010U in the top 0.5% of the most luminous novae ever observed. We find typical ejecta velocities of approximately 1100 km/s and that SN 2010U shares many spectral and photometric characteristics with two other fast and luminous Fe II type novae, including Nova LMC 1991 and M31N-2007-11d. Fo","authors_text":"A. Pastorello, E. Berger, G. H. Marion, Ian Czekala (Harvard University), J. C. Wheeler, J. Sollerman, J. Vink\\'o, M. Ergon, M. T. Botticella, P. Challis, R. Chornock, R. Margutti, S. Smartt","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-10-04T20:00:00Z","title":"The Unusually Luminous Extragalactic Nova SN 2010U"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.1573","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:5ec20cd1c25c1bd447e61b331cacaba6187d866c8f2f6b69e62e277b1ffc04a2","target":"record","created_at":"2026-05-18T01:54:05Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"0b88b1b40e95e33c37792912c09a7f27b230937f6203d44496b4b633f9b377b3","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-10-04T20:00:00Z","title_canon_sha256":"35595974197e27b3089096240549c32973dd2875187c54231b66d814411b34c4"},"schema_version":"1.0","source":{"id":"1210.1573","kind":"arxiv","version":1}},"canonical_sha256":"8350e2211b3b72a1b6d3029f3c68e40362d2b6a16e04ffecd79e847f6b26b8c9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8350e2211b3b72a1b6d3029f3c68e40362d2b6a16e04ffecd79e847f6b26b8c9","first_computed_at":"2026-05-18T01:54:05.599764Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:54:05.599764Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NRdIpHtxWOMpNU2n1uJPHWaZtmevazhJaBxl1/UNkFQEBzGu+0nz5y4vKJ0dFsgf4BYJiJm+ICWofK1kCKOTBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:54:05.600347Z","signed_message":"canonical_sha256_bytes"},"source_id":"1210.1573","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5ec20cd1c25c1bd447e61b331cacaba6187d866c8f2f6b69e62e277b1ffc04a2","sha256:509e302a660b42828586c4995d75d57a01039afd11332de6b38e68ffb15d89b6"],"state_sha256":"f81b0bcb65ed384bfd2864db179e98901fcb2bed4b957c40a8fd4700f555f0ac"}