{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:QZ6WC3DFKRJOUWFYFWMUZR2XQE","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":"69ed556def14cdbd956510b1e479d34db1a301f5788d05c69cc30265c00ff1c1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-06-29T20:17:19Z","title_canon_sha256":"1e12af82c0db92b0bff626ad56f3b9b0f9dac8b5af21ad1471d6956713870f81"},"schema_version":"1.0","source":{"id":"1506.08844","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.08844","created_at":"2026-05-18T01:31:38Z"},{"alias_kind":"arxiv_version","alias_value":"1506.08844v2","created_at":"2026-05-18T01:31:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.08844","created_at":"2026-05-18T01:31:38Z"},{"alias_kind":"pith_short_12","alias_value":"QZ6WC3DFKRJO","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"QZ6WC3DFKRJOUWFY","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"QZ6WC3DF","created_at":"2026-05-18T12:29:39Z"}],"graph_snapshots":[{"event_id":"sha256:bb4ceb1506868ef86417745286401784a097bf0ebe5b06270e27d04b5b97952e","target":"graph","created_at":"2026-05-18T01:31:38Z","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 seven epochs of spectropolarimetry of the Type IIb supernova (SN) 2011dh in M51, spanning 86 days of its evolution. The first epoch was obtained 9 days after the explosion, when the photosphere was still in the depleted hydrogen layer of the stripped-envelope progenitor. Continuum polarization is securely detected at the level of P~0.5% through day 14 and appears to diminish by day 30, which is different from the prevailing trends suggested by studies of other core-collapse SNe. Time-variable modulations in P and position angle are detected across P-Cygni line features. H-alpha and ","authors_text":"Alexei V. Filippenko, Avishay Gal-Yam, Douglas C. Leonard, G. Grant Williams, Jeffrey M. Silverman, Jennifer L. Hoffman, Jon C. Mauerhan, Kelsey I. Clubb, Leah Huk, Nathan Smith, Paul S. Smith, Peter Milne, Sagi Ben-Ami, S. Bradley Cenko","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-06-29T20:17:19Z","title":"Spectropolarimetry of SN 2011dh in M51: geometric insights on a Type IIb supernova progenitor and explosion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.08844","kind":"arxiv","version":2},"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":"sha256:50c99171725cded612ce37988a9850a6a7b8a882f50919571ed270524d160c36","target":"record","created_at":"2026-05-18T01:31:38Z","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":"69ed556def14cdbd956510b1e479d34db1a301f5788d05c69cc30265c00ff1c1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-06-29T20:17:19Z","title_canon_sha256":"1e12af82c0db92b0bff626ad56f3b9b0f9dac8b5af21ad1471d6956713870f81"},"schema_version":"1.0","source":{"id":"1506.08844","kind":"arxiv","version":2}},"canonical_sha256":"867d616c655452ea58b82d994cc7578127a97e23bfca8995bcd87f86e23d4ee1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"867d616c655452ea58b82d994cc7578127a97e23bfca8995bcd87f86e23d4ee1","first_computed_at":"2026-05-18T01:31:38.008619Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:31:38.008619Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IBx6bC5AY8UiI0VllGu+R5iG8HP9rYH4d2heEq1tqcw4uoKLY1td8CEoY2WW5uIb0oiT/haFa9md/DK9viwLDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:31:38.009289Z","signed_message":"canonical_sha256_bytes"},"source_id":"1506.08844","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:50c99171725cded612ce37988a9850a6a7b8a882f50919571ed270524d160c36","sha256:bb4ceb1506868ef86417745286401784a097bf0ebe5b06270e27d04b5b97952e"],"state_sha256":"3a5c2cd35c2e7a77172d0a1a4c274682b2b7d8338443fe46e5bee129144c7cda"}