{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:DP4HF3VYOFJOS7NHYL77EZMEIF","short_pith_number":"pith:DP4HF3VY","canonical_record":{"source":{"id":"2109.12136","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-09-24T18:04:23Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"f6d12ab1f19e80de45bac51a6134db49753865effd66e6f95e6ef1232bb63d57","abstract_canon_sha256":"a57ec22ef23fde686cf282a04b0037421a3397052865923685aeff4f2fa50e29"},"schema_version":"1.0"},"canonical_sha256":"1bf872eeb87152e97da7c2fff26584415542de699e1e85a96ad74bc7ae9b422c","source":{"kind":"arxiv","id":"2109.12136","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.12136","created_at":"2026-07-05T03:47:24Z"},{"alias_kind":"arxiv_version","alias_value":"2109.12136v2","created_at":"2026-07-05T03:47:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.12136","created_at":"2026-07-05T03:47:24Z"},{"alias_kind":"pith_short_12","alias_value":"DP4HF3VYOFJO","created_at":"2026-07-05T03:47:24Z"},{"alias_kind":"pith_short_16","alias_value":"DP4HF3VYOFJOS7NH","created_at":"2026-07-05T03:47:24Z"},{"alias_kind":"pith_short_8","alias_value":"DP4HF3VY","created_at":"2026-07-05T03:47:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:DP4HF3VYOFJOS7NHYL77EZMEIF","target":"record","payload":{"canonical_record":{"source":{"id":"2109.12136","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-09-24T18:04:23Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"f6d12ab1f19e80de45bac51a6134db49753865effd66e6f95e6ef1232bb63d57","abstract_canon_sha256":"a57ec22ef23fde686cf282a04b0037421a3397052865923685aeff4f2fa50e29"},"schema_version":"1.0"},"canonical_sha256":"1bf872eeb87152e97da7c2fff26584415542de699e1e85a96ad74bc7ae9b422c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:47:24.674978Z","signature_b64":"ATH96tSzGpwkoX7hmEYTt3MxWZYUbigtzNaEz43+l3sDO63ACpMC5tloxuw27nqWjlmuJsfXS6XGfgv3mR2aDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1bf872eeb87152e97da7c2fff26584415542de699e1e85a96ad74bc7ae9b422c","last_reissued_at":"2026-07-05T03:47:24.674480Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:47:24.674480Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2109.12136","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:47:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cedw+nHIWGrQMWYgKe/XkTo8KAkoGBxdcSLKsdPubCWGw85aIIEhHN9kxH0iGYohCDzasaFA02ywjR+u817+Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T11:04:14.218668Z"},"content_sha256":"5fe71576eb72fec8480ee27c9ee8f98b3c929f6f26d345c729b6b72f18c66e26","schema_version":"1.0","event_id":"sha256:5fe71576eb72fec8480ee27c9ee8f98b3c929f6f26d345c729b6b72f18c66e26"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:DP4HF3VYOFJOS7NHYL77EZMEIF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Final Moments I: Precursor Emission, Envelope Inflation, and Enhanced Mass loss Preceding the Luminous Type II Supernova 2020tlf","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"Adaeze L. Ibik, Alexander Gagliano, Armin Rest, C\\'esar Rojas-Bravo, Charles D. Kilpatrick, Christa Gall, Danny Milisavljevic, David A. Coulter, David J. Matthews, David Jones, Deanne Coppejans, Georgios Dimitriadis, Giacomo Terreran, Jens Hjorth, Katie Auchettl, Ken W. Smith, Kirsty Taggart, Kyle W. Davis, Lindsay DeMarchi, Luc Dessart, Maria R. Drout, Mark E. Huber, Matthew R. Siebert, Nicholas Earl, Patrick D. Aleo, Peter K. Blanchard, Qinan Wang, Raffaella Margutti, Ryan J. Foley, Ryan Ridden-Harper, Samaporn Tinyanont, Sofia Rest, Thomas de Boer, Wynn Jacobson-Gal\\'an, Yen-Chen Pan, Yossef Zenati","submitted_at":"2021-09-24T18:04:23Z","abstract_excerpt":"We present panchromatic observations and modeling of supernova (SN) 2020tlf, the first normal type II-P/L SN with confirmed precursor emission, as detected by the Young Supernova Experiment transient survey with the Pan-STARRS1 telescope. Pre-explosion emission was detected in $riz-$bands at 130 days prior to SN 2020tlf and persisted at relatively constant flux until first light. Soon after discovery, \"flash\" spectroscopy of SN 2020tlf revealed prominent narrow symmetric emission lines ($v_w < 300$ km s$^{-1}$) that resulted from the photo-ionization of unshocked circumstellar material (CSM) s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.12136","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2109.12136/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T03:47:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jPqckzxPvXzv5jX2I+hmoiY++S0MyKRzQmbRDSIXlRVMlv0vnkUNOUfkRAHbAWQmM4IMRma5clVPNizWsdGWCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T11:04:14.219216Z"},"content_sha256":"e62a402258d820837315380f2b2b63ddb9360f0c3f6dbcbeeb75b65e76e0f371","schema_version":"1.0","event_id":"sha256:e62a402258d820837315380f2b2b63ddb9360f0c3f6dbcbeeb75b65e76e0f371"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DP4HF3VYOFJOS7NHYL77EZMEIF/bundle.json","state_url":"https://pith.science/pith/DP4HF3VYOFJOS7NHYL77EZMEIF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DP4HF3VYOFJOS7NHYL77EZMEIF/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":"2026-08-10T11:04:14Z","links":{"resolver":"https://pith.science/pith/DP4HF3VYOFJOS7NHYL77EZMEIF","bundle":"https://pith.science/pith/DP4HF3VYOFJOS7NHYL77EZMEIF/bundle.json","state":"https://pith.science/pith/DP4HF3VYOFJOS7NHYL77EZMEIF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DP4HF3VYOFJOS7NHYL77EZMEIF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:DP4HF3VYOFJOS7NHYL77EZMEIF","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":"a57ec22ef23fde686cf282a04b0037421a3397052865923685aeff4f2fa50e29","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-09-24T18:04:23Z","title_canon_sha256":"f6d12ab1f19e80de45bac51a6134db49753865effd66e6f95e6ef1232bb63d57"},"schema_version":"1.0","source":{"id":"2109.12136","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.12136","created_at":"2026-07-05T03:47:24Z"},{"alias_kind":"arxiv_version","alias_value":"2109.12136v2","created_at":"2026-07-05T03:47:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.12136","created_at":"2026-07-05T03:47:24Z"},{"alias_kind":"pith_short_12","alias_value":"DP4HF3VYOFJO","created_at":"2026-07-05T03:47:24Z"},{"alias_kind":"pith_short_16","alias_value":"DP4HF3VYOFJOS7NH","created_at":"2026-07-05T03:47:24Z"},{"alias_kind":"pith_short_8","alias_value":"DP4HF3VY","created_at":"2026-07-05T03:47:24Z"}],"graph_snapshots":[{"event_id":"sha256:e62a402258d820837315380f2b2b63ddb9360f0c3f6dbcbeeb75b65e76e0f371","target":"graph","created_at":"2026-07-05T03:47:24Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2109.12136/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present panchromatic observations and modeling of supernova (SN) 2020tlf, the first normal type II-P/L SN with confirmed precursor emission, as detected by the Young Supernova Experiment transient survey with the Pan-STARRS1 telescope. Pre-explosion emission was detected in $riz-$bands at 130 days prior to SN 2020tlf and persisted at relatively constant flux until first light. Soon after discovery, \"flash\" spectroscopy of SN 2020tlf revealed prominent narrow symmetric emission lines ($v_w < 300$ km s$^{-1}$) that resulted from the photo-ionization of unshocked circumstellar material (CSM) s","authors_text":"Adaeze L. Ibik, Alexander Gagliano, Armin Rest, C\\'esar Rojas-Bravo, Charles D. Kilpatrick, Christa Gall, Danny Milisavljevic, David A. Coulter, David J. Matthews, David Jones, Deanne Coppejans, Georgios Dimitriadis, Giacomo Terreran, Jens Hjorth, Katie Auchettl, Ken W. Smith, Kirsty Taggart, Kyle W. Davis, Lindsay DeMarchi, Luc Dessart, Maria R. Drout, Mark E. Huber, Matthew R. Siebert, Nicholas Earl, Patrick D. Aleo, Peter K. Blanchard, Qinan Wang, Raffaella Margutti, Ryan J. Foley, Ryan Ridden-Harper, Samaporn Tinyanont, Sofia Rest, Thomas de Boer, Wynn Jacobson-Gal\\'an, Yen-Chen Pan, Yossef Zenati","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-09-24T18:04:23Z","title":"Final Moments I: Precursor Emission, Envelope Inflation, and Enhanced Mass loss Preceding the Luminous Type II Supernova 2020tlf"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.12136","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":"sha256:5fe71576eb72fec8480ee27c9ee8f98b3c929f6f26d345c729b6b72f18c66e26","target":"record","created_at":"2026-07-05T03:47:24Z","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":"a57ec22ef23fde686cf282a04b0037421a3397052865923685aeff4f2fa50e29","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-09-24T18:04:23Z","title_canon_sha256":"f6d12ab1f19e80de45bac51a6134db49753865effd66e6f95e6ef1232bb63d57"},"schema_version":"1.0","source":{"id":"2109.12136","kind":"arxiv","version":2}},"canonical_sha256":"1bf872eeb87152e97da7c2fff26584415542de699e1e85a96ad74bc7ae9b422c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1bf872eeb87152e97da7c2fff26584415542de699e1e85a96ad74bc7ae9b422c","first_computed_at":"2026-07-05T03:47:24.674480Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:47:24.674480Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ATH96tSzGpwkoX7hmEYTt3MxWZYUbigtzNaEz43+l3sDO63ACpMC5tloxuw27nqWjlmuJsfXS6XGfgv3mR2aDA==","signature_status":"signed_v1","signed_at":"2026-07-05T03:47:24.674978Z","signed_message":"canonical_sha256_bytes"},"source_id":"2109.12136","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5fe71576eb72fec8480ee27c9ee8f98b3c929f6f26d345c729b6b72f18c66e26","sha256:e62a402258d820837315380f2b2b63ddb9360f0c3f6dbcbeeb75b65e76e0f371"],"state_sha256":"f4c8a427345d265b2db390a913c92b17b9e93dd7661d6bbe7435476f6fa63930"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+rjlXTulFW+sDcLFTlmB4VKN25i5EIWOALP1bk/5jTyb2CNU95MYkCNVudjirWSHyCZy9OMpxYq/wYG1nUOFDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T11:04:14.224084Z","bundle_sha256":"c47d789c81564e63896c92fd8f9e8480a466cb1f058b6e496d20d87151c92cdc"}}