{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:YVUIOYARUZGID2B7OABLBJOIKA","short_pith_number":"pith:YVUIOYAR","canonical_record":{"source":{"id":"2208.11201","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-08-23T21:32:55Z","cross_cats_sorted":[],"title_canon_sha256":"27eefb7cd8abc7a0a78217492374ab3033b6ed2b563ed18e222bf5bc6fb8da30","abstract_canon_sha256":"1ee4356cf7b0f8a4f0895d6f266c25db1d18e74621102197c03959fea86d6f86"},"schema_version":"1.0"},"canonical_sha256":"c568876011a64c81e83f7002b0a5c85038594f04ccb4c8f4ab693358d327991b","source":{"kind":"arxiv","id":"2208.11201","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2208.11201","created_at":"2026-07-05T04:51:12Z"},{"alias_kind":"arxiv_version","alias_value":"2208.11201v1","created_at":"2026-07-05T04:51:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2208.11201","created_at":"2026-07-05T04:51:12Z"},{"alias_kind":"pith_short_12","alias_value":"YVUIOYARUZGI","created_at":"2026-07-05T04:51:12Z"},{"alias_kind":"pith_short_16","alias_value":"YVUIOYARUZGID2B7","created_at":"2026-07-05T04:51:12Z"},{"alias_kind":"pith_short_8","alias_value":"YVUIOYAR","created_at":"2026-07-05T04:51:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:YVUIOYARUZGID2B7OABLBJOIKA","target":"record","payload":{"canonical_record":{"source":{"id":"2208.11201","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-08-23T21:32:55Z","cross_cats_sorted":[],"title_canon_sha256":"27eefb7cd8abc7a0a78217492374ab3033b6ed2b563ed18e222bf5bc6fb8da30","abstract_canon_sha256":"1ee4356cf7b0f8a4f0895d6f266c25db1d18e74621102197c03959fea86d6f86"},"schema_version":"1.0"},"canonical_sha256":"c568876011a64c81e83f7002b0a5c85038594f04ccb4c8f4ab693358d327991b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:51:12.439849Z","signature_b64":"WxrxGsc1xycpsGLowPIwoG9nZ7pt4KrnGaqPz8bzC9G2CFSPDAo1V7aMLX8tuRu68WsTE+gPafE0V8hqrSD3CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c568876011a64c81e83f7002b0a5c85038594f04ccb4c8f4ab693358d327991b","last_reissued_at":"2026-07-05T04:51:12.439361Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:51:12.439361Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2208.11201","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":"2026-07-05T04:51:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TbiZquvQeSSY/FpiM4GgFJBa5J2yEluWM5TacaIWj0o3UQl29KlLzDuRGGD+NWQTvToQLIUiOLu9Ju/H5dbpBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T03:34:12.928862Z"},"content_sha256":"2af2d695970ed0bc77434176dfec02cfbf6b4eeacd9933745589a940be614df2","schema_version":"1.0","event_id":"sha256:2af2d695970ed0bc77434176dfec02cfbf6b4eeacd9933745589a940be614df2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:YVUIOYARUZGID2B7OABLBJOIKA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Companion Shocking Fits to the 2018 ZTF Sample of SNe Ia Are Consistent with Single-Degenerate Progenitor Systems","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"D. A. Howell, D. J. Sand, G. Hosseinzadeh, J. Burke","submitted_at":"2022-08-23T21:32:55Z","abstract_excerpt":"The early lightcurves of Type Ia supernovae (SNe Ia) can be used to test predictions about their progenitor systems. If the progenitor system consists of a single white dwarf in a binary with a Roche-lobe-overflowing non-degenerate stellar companion, then the SN ejecta should collide with that companion soon after the explosion and get shock-heated, leaving an early UV excess in the lightcurve. This excess would only be observable for events with favorable viewing angles, $\\sim$10\\% of the time. We model the 2018 ZTF sample of 127 SNe Ia using companion shocking models, and recover an observed"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2208.11201","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2208.11201/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":"2026-07-05T04:51:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cH7bEQV5d7/g3So6mbtydyBd7BvJl46GSdNDrpAIIxUHOLHq+cOARHUyGwkkaH5C/q/B1rhGDm84NRi8szgcAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T03:34:12.929779Z"},"content_sha256":"7de2c9ac3f13195210767a6e6dba99b24e2d278115f89e24924667d48a809311","schema_version":"1.0","event_id":"sha256:7de2c9ac3f13195210767a6e6dba99b24e2d278115f89e24924667d48a809311"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YVUIOYARUZGID2B7OABLBJOIKA/bundle.json","state_url":"https://pith.science/pith/YVUIOYARUZGID2B7OABLBJOIKA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YVUIOYARUZGID2B7OABLBJOIKA/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":"2026-08-07T03:34:12Z","links":{"resolver":"https://pith.science/pith/YVUIOYARUZGID2B7OABLBJOIKA","bundle":"https://pith.science/pith/YVUIOYARUZGID2B7OABLBJOIKA/bundle.json","state":"https://pith.science/pith/YVUIOYARUZGID2B7OABLBJOIKA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YVUIOYARUZGID2B7OABLBJOIKA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:YVUIOYARUZGID2B7OABLBJOIKA","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":"1ee4356cf7b0f8a4f0895d6f266c25db1d18e74621102197c03959fea86d6f86","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-08-23T21:32:55Z","title_canon_sha256":"27eefb7cd8abc7a0a78217492374ab3033b6ed2b563ed18e222bf5bc6fb8da30"},"schema_version":"1.0","source":{"id":"2208.11201","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2208.11201","created_at":"2026-07-05T04:51:12Z"},{"alias_kind":"arxiv_version","alias_value":"2208.11201v1","created_at":"2026-07-05T04:51:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2208.11201","created_at":"2026-07-05T04:51:12Z"},{"alias_kind":"pith_short_12","alias_value":"YVUIOYARUZGI","created_at":"2026-07-05T04:51:12Z"},{"alias_kind":"pith_short_16","alias_value":"YVUIOYARUZGID2B7","created_at":"2026-07-05T04:51:12Z"},{"alias_kind":"pith_short_8","alias_value":"YVUIOYAR","created_at":"2026-07-05T04:51:12Z"}],"graph_snapshots":[{"event_id":"sha256:7de2c9ac3f13195210767a6e6dba99b24e2d278115f89e24924667d48a809311","target":"graph","created_at":"2026-07-05T04:51:12Z","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/2208.11201/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The early lightcurves of Type Ia supernovae (SNe Ia) can be used to test predictions about their progenitor systems. If the progenitor system consists of a single white dwarf in a binary with a Roche-lobe-overflowing non-degenerate stellar companion, then the SN ejecta should collide with that companion soon after the explosion and get shock-heated, leaving an early UV excess in the lightcurve. This excess would only be observable for events with favorable viewing angles, $\\sim$10\\% of the time. We model the 2018 ZTF sample of 127 SNe Ia using companion shocking models, and recover an observed","authors_text":"D. A. Howell, D. J. Sand, G. Hosseinzadeh, J. Burke","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-08-23T21:32:55Z","title":"Companion Shocking Fits to the 2018 ZTF Sample of SNe Ia Are Consistent with Single-Degenerate Progenitor Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2208.11201","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":"sha256:2af2d695970ed0bc77434176dfec02cfbf6b4eeacd9933745589a940be614df2","target":"record","created_at":"2026-07-05T04:51:12Z","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":"1ee4356cf7b0f8a4f0895d6f266c25db1d18e74621102197c03959fea86d6f86","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-08-23T21:32:55Z","title_canon_sha256":"27eefb7cd8abc7a0a78217492374ab3033b6ed2b563ed18e222bf5bc6fb8da30"},"schema_version":"1.0","source":{"id":"2208.11201","kind":"arxiv","version":1}},"canonical_sha256":"c568876011a64c81e83f7002b0a5c85038594f04ccb4c8f4ab693358d327991b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c568876011a64c81e83f7002b0a5c85038594f04ccb4c8f4ab693358d327991b","first_computed_at":"2026-07-05T04:51:12.439361Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:51:12.439361Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WxrxGsc1xycpsGLowPIwoG9nZ7pt4KrnGaqPz8bzC9G2CFSPDAo1V7aMLX8tuRu68WsTE+gPafE0V8hqrSD3CA==","signature_status":"signed_v1","signed_at":"2026-07-05T04:51:12.439849Z","signed_message":"canonical_sha256_bytes"},"source_id":"2208.11201","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2af2d695970ed0bc77434176dfec02cfbf6b4eeacd9933745589a940be614df2","sha256:7de2c9ac3f13195210767a6e6dba99b24e2d278115f89e24924667d48a809311"],"state_sha256":"18a75dc44d6782f93bf178a482266a3b2ba8bde13fe9a7656adef82d0bd0ddc7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EG+f4BbrnzC5p2fggGYAcw/0iGLoIb1L3hBkM2n8xSZ7iuXCEozGMsF7Aw2dYCsVUofKzFfeVg5Wu+fwC0D4Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T03:34:12.936535Z","bundle_sha256":"b0464481454817282e8f275a607cccd83eb430353477f71d9fa03d9b02552204"}}