{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:VGFQGWV2SBQ2M2FVLEGFXFKHMG","short_pith_number":"pith:VGFQGWV2","canonical_record":{"source":{"id":"0909.5564","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-09-30T10:40:06Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"2cdbeb764788e5857f25bc50bf2a00e377a4fc8db6e3ab2bfbd767b2a5edc350","abstract_canon_sha256":"cc6d7936936fe91f2d366d3afe4361b464b5e55c345095ede642c50dd1126317"},"schema_version":"1.0"},"canonical_sha256":"a98b035aba9061a668b5590c5b9547618fba4c81b6c3b2e44f1d7763d91497fa","source":{"kind":"arxiv","id":"0909.5564","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.5564","created_at":"2026-05-18T04:37:33Z"},{"alias_kind":"arxiv_version","alias_value":"0909.5564v1","created_at":"2026-05-18T04:37:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.5564","created_at":"2026-05-18T04:37:33Z"},{"alias_kind":"pith_short_12","alias_value":"VGFQGWV2SBQ2","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"VGFQGWV2SBQ2M2FV","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"VGFQGWV2","created_at":"2026-05-18T12:26:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:VGFQGWV2SBQ2M2FVLEGFXFKHMG","target":"record","payload":{"canonical_record":{"source":{"id":"0909.5564","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-09-30T10:40:06Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"2cdbeb764788e5857f25bc50bf2a00e377a4fc8db6e3ab2bfbd767b2a5edc350","abstract_canon_sha256":"cc6d7936936fe91f2d366d3afe4361b464b5e55c345095ede642c50dd1126317"},"schema_version":"1.0"},"canonical_sha256":"a98b035aba9061a668b5590c5b9547618fba4c81b6c3b2e44f1d7763d91497fa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:37:33.764985Z","signature_b64":"F9wkwXiqDFdKBENO46JfqWS/cxt9zDCHFFAlpXZBD4B9vUyBGTO2aS0hnrcXcwJrIeg7PBrGLdCsJBcAqGfzCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a98b035aba9061a668b5590c5b9547618fba4c81b6c3b2e44f1d7763d91497fa","last_reissued_at":"2026-05-18T04:37:33.764302Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:37:33.764302Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0909.5564","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:37:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CvVVWTUxYo8i+LErNoLjhXTtGgxJGfFZ6S/11GvDKu2HxApw4u6nEGvBuVwDWmftKEb0nfUBtfNuIRfwdCt2CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T19:27:49.342800Z"},"content_sha256":"d11acda4bfac06726e917473e0f1159e635dc87cfe54944e8fcd5a0db21be7e8","schema_version":"1.0","event_id":"sha256:d11acda4bfac06726e917473e0f1159e635dc87cfe54944e8fcd5a0db21be7e8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:VGFQGWV2SBQ2M2FVLEGFXFKHMG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"VLT Spectropolarimetry of the fast expanding Type Ia SN2006X","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.SR","authors_text":"D. Baade, F. Patat, J. C. Wheeler, J. R. Maund, L. Wang, P. Hoeflich","submitted_at":"2009-09-30T10:40:06Z","abstract_excerpt":"Using VLT-FORS1 we performed optical spectropolarimetric observations of the Type Ia SN2006X on 7 pre-maximum epochs (day -10 to day -1) and one post-maximum epoch (+39 days). The SN shows strong continuum interstellar polarization reaching about 8% at 4000A, characterized by a wavelength dependency that is substantially different from that of the Milky-Way dust mixture. Several SN features, like SiII 6355A and the CaII IR triplet, present a marked evolution. The CaII near-IR triplet shows a pronounced polarization (~1.4%) already on day -10 in correspondence with a strong high-velocity featur"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.5564","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:37:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wE8hfIWXPXBDg4zGYL9crd5hgjQ3XpwM42PswV9oGvhnBuEyHEnPUEQ5UqjuirSyrVXT5kMZO8eheAGVkBSQAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T19:27:49.343366Z"},"content_sha256":"4b2fd1c69271d0b1e96ee6344713ed8bc3addf9cf36a6cc24c52a5d36e135ee0","schema_version":"1.0","event_id":"sha256:4b2fd1c69271d0b1e96ee6344713ed8bc3addf9cf36a6cc24c52a5d36e135ee0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VGFQGWV2SBQ2M2FVLEGFXFKHMG/bundle.json","state_url":"https://pith.science/pith/VGFQGWV2SBQ2M2FVLEGFXFKHMG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VGFQGWV2SBQ2M2FVLEGFXFKHMG/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-18T19:27:49Z","links":{"resolver":"https://pith.science/pith/VGFQGWV2SBQ2M2FVLEGFXFKHMG","bundle":"https://pith.science/pith/VGFQGWV2SBQ2M2FVLEGFXFKHMG/bundle.json","state":"https://pith.science/pith/VGFQGWV2SBQ2M2FVLEGFXFKHMG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VGFQGWV2SBQ2M2FVLEGFXFKHMG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:VGFQGWV2SBQ2M2FVLEGFXFKHMG","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":"cc6d7936936fe91f2d366d3afe4361b464b5e55c345095ede642c50dd1126317","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-09-30T10:40:06Z","title_canon_sha256":"2cdbeb764788e5857f25bc50bf2a00e377a4fc8db6e3ab2bfbd767b2a5edc350"},"schema_version":"1.0","source":{"id":"0909.5564","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.5564","created_at":"2026-05-18T04:37:33Z"},{"alias_kind":"arxiv_version","alias_value":"0909.5564v1","created_at":"2026-05-18T04:37:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.5564","created_at":"2026-05-18T04:37:33Z"},{"alias_kind":"pith_short_12","alias_value":"VGFQGWV2SBQ2","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"VGFQGWV2SBQ2M2FV","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"VGFQGWV2","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:4b2fd1c69271d0b1e96ee6344713ed8bc3addf9cf36a6cc24c52a5d36e135ee0","target":"graph","created_at":"2026-05-18T04:37:33Z","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":"Using VLT-FORS1 we performed optical spectropolarimetric observations of the Type Ia SN2006X on 7 pre-maximum epochs (day -10 to day -1) and one post-maximum epoch (+39 days). The SN shows strong continuum interstellar polarization reaching about 8% at 4000A, characterized by a wavelength dependency that is substantially different from that of the Milky-Way dust mixture. Several SN features, like SiII 6355A and the CaII IR triplet, present a marked evolution. The CaII near-IR triplet shows a pronounced polarization (~1.4%) already on day -10 in correspondence with a strong high-velocity featur","authors_text":"D. Baade, F. Patat, J. C. Wheeler, J. R. Maund, L. Wang, P. Hoeflich","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-09-30T10:40:06Z","title":"VLT Spectropolarimetry of the fast expanding Type Ia SN2006X"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.5564","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:d11acda4bfac06726e917473e0f1159e635dc87cfe54944e8fcd5a0db21be7e8","target":"record","created_at":"2026-05-18T04:37:33Z","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":"cc6d7936936fe91f2d366d3afe4361b464b5e55c345095ede642c50dd1126317","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-09-30T10:40:06Z","title_canon_sha256":"2cdbeb764788e5857f25bc50bf2a00e377a4fc8db6e3ab2bfbd767b2a5edc350"},"schema_version":"1.0","source":{"id":"0909.5564","kind":"arxiv","version":1}},"canonical_sha256":"a98b035aba9061a668b5590c5b9547618fba4c81b6c3b2e44f1d7763d91497fa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a98b035aba9061a668b5590c5b9547618fba4c81b6c3b2e44f1d7763d91497fa","first_computed_at":"2026-05-18T04:37:33.764302Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:37:33.764302Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"F9wkwXiqDFdKBENO46JfqWS/cxt9zDCHFFAlpXZBD4B9vUyBGTO2aS0hnrcXcwJrIeg7PBrGLdCsJBcAqGfzCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:37:33.764985Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.5564","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d11acda4bfac06726e917473e0f1159e635dc87cfe54944e8fcd5a0db21be7e8","sha256:4b2fd1c69271d0b1e96ee6344713ed8bc3addf9cf36a6cc24c52a5d36e135ee0"],"state_sha256":"ef316fb5086c97e0757065ac2dcf494a4534527e5e57df3e4fd2a7d22fdfd0d0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZHl7yYPBpJdpeEp2JIG+Al5XNwW9Xpgzbq8CBluxush337Kak9VUjeF1qWfoOAZmf6gHblllkbhnSKvFEBfKAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-18T19:27:49.345268Z","bundle_sha256":"99de08d6ed70f0540c20f19f376a6ac7a8a13f920f4bbfa97477e3bfecf81f97"}}