{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:LT5UJ6M5L5NAGIFXB7I3MX7ED7","short_pith_number":"pith:LT5UJ6M5","canonical_record":{"source":{"id":"1607.04784","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-07-16T18:44:25Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"8a9e845d952882bf644838548be74562099c80c266241805949859870a09679b","abstract_canon_sha256":"54a7dccc54bf0003e571a47c57b557cfb86ac27a8860a4ac1dcc4f76ce08c2c2"},"schema_version":"1.0"},"canonical_sha256":"5cfb44f99d5f5a0320b70fd1b65fe41ffb2d5e93aa5ec1571771fa1a8e2fbade","source":{"kind":"arxiv","id":"1607.04784","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.04784","created_at":"2026-05-18T00:51:16Z"},{"alias_kind":"arxiv_version","alias_value":"1607.04784v1","created_at":"2026-05-18T00:51:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.04784","created_at":"2026-05-18T00:51:16Z"},{"alias_kind":"pith_short_12","alias_value":"LT5UJ6M5L5NA","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_16","alias_value":"LT5UJ6M5L5NAGIFX","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_8","alias_value":"LT5UJ6M5","created_at":"2026-05-18T12:30:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:LT5UJ6M5L5NAGIFXB7I3MX7ED7","target":"record","payload":{"canonical_record":{"source":{"id":"1607.04784","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-07-16T18:44:25Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"8a9e845d952882bf644838548be74562099c80c266241805949859870a09679b","abstract_canon_sha256":"54a7dccc54bf0003e571a47c57b557cfb86ac27a8860a4ac1dcc4f76ce08c2c2"},"schema_version":"1.0"},"canonical_sha256":"5cfb44f99d5f5a0320b70fd1b65fe41ffb2d5e93aa5ec1571771fa1a8e2fbade","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:51:16.884658Z","signature_b64":"zPIEwY+OcSLmWkxZ94N+Z+PTy3He6uPGspuitk0oSf3bnU2AiNicF/+bGTaeabGpPQ1TNgahNH2merZJgmTnCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5cfb44f99d5f5a0320b70fd1b65fe41ffb2d5e93aa5ec1571771fa1a8e2fbade","last_reissued_at":"2026-05-18T00:51:16.884143Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:51:16.884143Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1607.04784","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":"2026-05-18T00:51:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EORnlv7k+tzpR9NZyTSGAN5kl2H/4Lmwln4mxqj1Ytet4SKRjsNCtURiVz0kKyy7e36pT+KreboTTuSedHOWCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T14:59:19.103552Z"},"content_sha256":"4fda167de4e76d4d538f1fce317835f880099d04c5bd91a39b8e549e64896829","schema_version":"1.0","event_id":"sha256:4fda167de4e76d4d538f1fce317835f880099d04c5bd91a39b8e549e64896829"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:LT5UJ6M5L5NAGIFXB7I3MX7ED7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical and ultraviolet spectroscopic analysis of SN 2011fe at late times","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"Alexei V. Filippenko, Armin Rest, Brian Friesen, Daniel Kasen, Daniel P. Cohen, Darryl E. Wright, David Branch, E. Baron, Isaac Shivvers, Jeffrey M. Silverman, Jerod T. Parrent, Keiichi Maeda, Kelsey I. Clubb, Patrick L. Kelly, Peter H. Hauschildt, Peter Nugent, R. C. Thomas, Ryan J. Foley, Yen-Chen Pan","submitted_at":"2016-07-16T18:44:25Z","abstract_excerpt":"We present optical spectra of the nearby Type Ia supernova SN 2011fe at 100, 205, 311, 349, and 578 days post-maximum light, as well as an ultraviolet spectrum obtained with Hubble Space Telescope at 360 days post-maximum light. We compare these observations with synthetic spectra produced with the radiative transfer code PHOENIX. The day +100 spectrum can be well fit with models which neglect collisional and radiative data for forbidden lines. Curiously, including this data and recomputing the fit yields a quite similar spectrum, but with different combinations of lines forming some of the st"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.04784","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":"2026-05-18T00:51:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XJGIWxMyXvU4CS8KCXpwdpKlscDsWf9XynV3GU/4/FCV8Gpzkj3380QFHZG7szt8650cC6urZLExCu8A2kkEBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T14:59:19.103906Z"},"content_sha256":"636900327bf9dc01a8e71be7556e046616fed35f2c18b7395d6e3164169d5350","schema_version":"1.0","event_id":"sha256:636900327bf9dc01a8e71be7556e046616fed35f2c18b7395d6e3164169d5350"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LT5UJ6M5L5NAGIFXB7I3MX7ED7/bundle.json","state_url":"https://pith.science/pith/LT5UJ6M5L5NAGIFXB7I3MX7ED7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LT5UJ6M5L5NAGIFXB7I3MX7ED7/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":"2026-06-03T14:59:19Z","links":{"resolver":"https://pith.science/pith/LT5UJ6M5L5NAGIFXB7I3MX7ED7","bundle":"https://pith.science/pith/LT5UJ6M5L5NAGIFXB7I3MX7ED7/bundle.json","state":"https://pith.science/pith/LT5UJ6M5L5NAGIFXB7I3MX7ED7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LT5UJ6M5L5NAGIFXB7I3MX7ED7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:LT5UJ6M5L5NAGIFXB7I3MX7ED7","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":"54a7dccc54bf0003e571a47c57b557cfb86ac27a8860a4ac1dcc4f76ce08c2c2","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-07-16T18:44:25Z","title_canon_sha256":"8a9e845d952882bf644838548be74562099c80c266241805949859870a09679b"},"schema_version":"1.0","source":{"id":"1607.04784","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.04784","created_at":"2026-05-18T00:51:16Z"},{"alias_kind":"arxiv_version","alias_value":"1607.04784v1","created_at":"2026-05-18T00:51:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.04784","created_at":"2026-05-18T00:51:16Z"},{"alias_kind":"pith_short_12","alias_value":"LT5UJ6M5L5NA","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_16","alias_value":"LT5UJ6M5L5NAGIFX","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_8","alias_value":"LT5UJ6M5","created_at":"2026-05-18T12:30:29Z"}],"graph_snapshots":[{"event_id":"sha256:636900327bf9dc01a8e71be7556e046616fed35f2c18b7395d6e3164169d5350","target":"graph","created_at":"2026-05-18T00:51:16Z","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 optical spectra of the nearby Type Ia supernova SN 2011fe at 100, 205, 311, 349, and 578 days post-maximum light, as well as an ultraviolet spectrum obtained with Hubble Space Telescope at 360 days post-maximum light. We compare these observations with synthetic spectra produced with the radiative transfer code PHOENIX. The day +100 spectrum can be well fit with models which neglect collisional and radiative data for forbidden lines. Curiously, including this data and recomputing the fit yields a quite similar spectrum, but with different combinations of lines forming some of the st","authors_text":"Alexei V. Filippenko, Armin Rest, Brian Friesen, Daniel Kasen, Daniel P. Cohen, Darryl E. Wright, David Branch, E. Baron, Isaac Shivvers, Jeffrey M. Silverman, Jerod T. Parrent, Keiichi Maeda, Kelsey I. Clubb, Patrick L. Kelly, Peter H. Hauschildt, Peter Nugent, R. C. Thomas, Ryan J. Foley, Yen-Chen Pan","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-07-16T18:44:25Z","title":"Optical and ultraviolet spectroscopic analysis of SN 2011fe at late times"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.04784","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":"sha256:4fda167de4e76d4d538f1fce317835f880099d04c5bd91a39b8e549e64896829","target":"record","created_at":"2026-05-18T00:51:16Z","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":"54a7dccc54bf0003e571a47c57b557cfb86ac27a8860a4ac1dcc4f76ce08c2c2","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-07-16T18:44:25Z","title_canon_sha256":"8a9e845d952882bf644838548be74562099c80c266241805949859870a09679b"},"schema_version":"1.0","source":{"id":"1607.04784","kind":"arxiv","version":1}},"canonical_sha256":"5cfb44f99d5f5a0320b70fd1b65fe41ffb2d5e93aa5ec1571771fa1a8e2fbade","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5cfb44f99d5f5a0320b70fd1b65fe41ffb2d5e93aa5ec1571771fa1a8e2fbade","first_computed_at":"2026-05-18T00:51:16.884143Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:51:16.884143Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zPIEwY+OcSLmWkxZ94N+Z+PTy3He6uPGspuitk0oSf3bnU2AiNicF/+bGTaeabGpPQ1TNgahNH2merZJgmTnCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:51:16.884658Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.04784","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4fda167de4e76d4d538f1fce317835f880099d04c5bd91a39b8e549e64896829","sha256:636900327bf9dc01a8e71be7556e046616fed35f2c18b7395d6e3164169d5350"],"state_sha256":"fff15318ccea37ac3ea5a4bfb690cb806ec5d534e46e4c48d0876f5b2e9832b2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5PhI2C8ekxz9/M6RMD2Pn/22DKshcmYBndiQPetnUMOz0FiBM0Q5U/sMm8wvYvhdSh2vOp3u63rWiNBspmsLCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T14:59:19.106256Z","bundle_sha256":"a88ae346604e7ca4500d32963d1715cbb84327530bdce3d904e2e6743f4fe98c"}}