{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:2YIBQKBM2HLUCMGE3CT2FUXOSK","short_pith_number":"pith:2YIBQKBM","canonical_record":{"source":{"id":"1907.08572","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-07-19T16:52:59Z","cross_cats_sorted":[],"title_canon_sha256":"e20d9921054f021ae928810c43b588c358e59c25087c69a8fb720cd83906c0e2","abstract_canon_sha256":"9953b33f053cae3d49794754083f8b2ca606f75c388d0b3d38f829af50b64c09"},"schema_version":"1.0"},"canonical_sha256":"d61018282cd1d74130c4d8a7a2d2ee92943a3a8591f4efd29db7ff2083588564","source":{"kind":"arxiv","id":"1907.08572","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.08572","created_at":"2026-05-17T23:40:09Z"},{"alias_kind":"arxiv_version","alias_value":"1907.08572v1","created_at":"2026-05-17T23:40:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.08572","created_at":"2026-05-17T23:40:09Z"},{"alias_kind":"pith_short_12","alias_value":"2YIBQKBM2HLU","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"2YIBQKBM2HLUCMGE","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"2YIBQKBM","created_at":"2026-05-18T12:33:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:2YIBQKBM2HLUCMGE3CT2FUXOSK","target":"record","payload":{"canonical_record":{"source":{"id":"1907.08572","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-07-19T16:52:59Z","cross_cats_sorted":[],"title_canon_sha256":"e20d9921054f021ae928810c43b588c358e59c25087c69a8fb720cd83906c0e2","abstract_canon_sha256":"9953b33f053cae3d49794754083f8b2ca606f75c388d0b3d38f829af50b64c09"},"schema_version":"1.0"},"canonical_sha256":"d61018282cd1d74130c4d8a7a2d2ee92943a3a8591f4efd29db7ff2083588564","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:40:09.402033Z","signature_b64":"xMEuhtedRniQY/1VwR95unKLOOiNS9UMeyu6erVXEOB5yaXmeCGo4Rzh+JpFsS2Tsd0A7A+dNH8rFFHQbzNFCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d61018282cd1d74130c4d8a7a2d2ee92943a3a8591f4efd29db7ff2083588564","last_reissued_at":"2026-05-17T23:40:09.401407Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:40:09.401407Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1907.08572","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":"2026-05-17T23:40:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YZ9pACz5eZyVZHKYadx54K/lYMNRJV+5RuaKubPVYDWO67VGzDUXIX+zV7XQU0I19e6UgShV+Nj6NIF5xQRoCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T00:37:35.163121Z"},"content_sha256":"1bb7465e10a15c819e71f00c127a1ef850556c6c90e42816a3bc06527b3c29e7","schema_version":"1.0","event_id":"sha256:1bb7465e10a15c819e71f00c127a1ef850556c6c90e42816a3bc06527b3c29e7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:2YIBQKBM2HLUCMGE3CT2FUXOSK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Modeling the non-thermal emission of the gamma Cygni Supernova Remnant up to the highest energies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Henrike Fleischhack (for the HAWC Collaboration)","submitted_at":"2019-07-19T16:52:59Z","abstract_excerpt":"The gamma Cygni supernova remnant (SNR) is a middle-aged, Sedov-phase SNR in the Cygnus region. It is a known source of non-thermal emission at radio, X-ray, and gamma-ray energies. Very-high energy (VHE, >100 GeV) gamma-ray emission from gamma Cygni was first detected by the VERITAS observatory and it has since been observed by other experiments. Observations so far indicate that there must be a population of non-thermal particles present in the remnant which produces the observed emission. However, it is not clear what kind of particles (protons/ions or electrons) are accelerated in the remn"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.08572","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":"2026-05-17T23:40:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VJp7igWTuFlhScU9J/3PDudtS3JpZuwzxMSZgSIfy3iGdkA0IrW6j3WuQLvv8lSSuHaKyN1fVqlAsBU+V+vtDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T00:37:35.163957Z"},"content_sha256":"e3e77a33aef07ded4a255d109bbd1d8bffd704db7c91fd0d3538b4ca6e2418a4","schema_version":"1.0","event_id":"sha256:e3e77a33aef07ded4a255d109bbd1d8bffd704db7c91fd0d3538b4ca6e2418a4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2YIBQKBM2HLUCMGE3CT2FUXOSK/bundle.json","state_url":"https://pith.science/pith/2YIBQKBM2HLUCMGE3CT2FUXOSK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2YIBQKBM2HLUCMGE3CT2FUXOSK/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":"2026-06-01T00:37:35Z","links":{"resolver":"https://pith.science/pith/2YIBQKBM2HLUCMGE3CT2FUXOSK","bundle":"https://pith.science/pith/2YIBQKBM2HLUCMGE3CT2FUXOSK/bundle.json","state":"https://pith.science/pith/2YIBQKBM2HLUCMGE3CT2FUXOSK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2YIBQKBM2HLUCMGE3CT2FUXOSK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:2YIBQKBM2HLUCMGE3CT2FUXOSK","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":"9953b33f053cae3d49794754083f8b2ca606f75c388d0b3d38f829af50b64c09","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-07-19T16:52:59Z","title_canon_sha256":"e20d9921054f021ae928810c43b588c358e59c25087c69a8fb720cd83906c0e2"},"schema_version":"1.0","source":{"id":"1907.08572","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.08572","created_at":"2026-05-17T23:40:09Z"},{"alias_kind":"arxiv_version","alias_value":"1907.08572v1","created_at":"2026-05-17T23:40:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.08572","created_at":"2026-05-17T23:40:09Z"},{"alias_kind":"pith_short_12","alias_value":"2YIBQKBM2HLU","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"2YIBQKBM2HLUCMGE","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"2YIBQKBM","created_at":"2026-05-18T12:33:07Z"}],"graph_snapshots":[{"event_id":"sha256:e3e77a33aef07ded4a255d109bbd1d8bffd704db7c91fd0d3538b4ca6e2418a4","target":"graph","created_at":"2026-05-17T23:40:09Z","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":"The gamma Cygni supernova remnant (SNR) is a middle-aged, Sedov-phase SNR in the Cygnus region. It is a known source of non-thermal emission at radio, X-ray, and gamma-ray energies. Very-high energy (VHE, >100 GeV) gamma-ray emission from gamma Cygni was first detected by the VERITAS observatory and it has since been observed by other experiments. Observations so far indicate that there must be a population of non-thermal particles present in the remnant which produces the observed emission. However, it is not clear what kind of particles (protons/ions or electrons) are accelerated in the remn","authors_text":"Henrike Fleischhack (for the HAWC Collaboration)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-07-19T16:52:59Z","title":"Modeling the non-thermal emission of the gamma Cygni Supernova Remnant up to the highest energies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.08572","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":"sha256:1bb7465e10a15c819e71f00c127a1ef850556c6c90e42816a3bc06527b3c29e7","target":"record","created_at":"2026-05-17T23:40:09Z","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":"9953b33f053cae3d49794754083f8b2ca606f75c388d0b3d38f829af50b64c09","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-07-19T16:52:59Z","title_canon_sha256":"e20d9921054f021ae928810c43b588c358e59c25087c69a8fb720cd83906c0e2"},"schema_version":"1.0","source":{"id":"1907.08572","kind":"arxiv","version":1}},"canonical_sha256":"d61018282cd1d74130c4d8a7a2d2ee92943a3a8591f4efd29db7ff2083588564","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d61018282cd1d74130c4d8a7a2d2ee92943a3a8591f4efd29db7ff2083588564","first_computed_at":"2026-05-17T23:40:09.401407Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:40:09.401407Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xMEuhtedRniQY/1VwR95unKLOOiNS9UMeyu6erVXEOB5yaXmeCGo4Rzh+JpFsS2Tsd0A7A+dNH8rFFHQbzNFCQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:40:09.402033Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.08572","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1bb7465e10a15c819e71f00c127a1ef850556c6c90e42816a3bc06527b3c29e7","sha256:e3e77a33aef07ded4a255d109bbd1d8bffd704db7c91fd0d3538b4ca6e2418a4"],"state_sha256":"1ac4374b53b2bc1a9c131f0deace78dc01784c185c71ddeb6d39d308caad0728"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A3ju6pnXZ7R+hE3hvBIIloHS7cpVcFilkcGQSGy3e5+FQ+Lx9L3vm/gGBqX31jhA2XIp4vE3gUhdRw1Yf4DLDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T00:37:35.168717Z","bundle_sha256":"88447fde966f6cb1e97884081bc8787697941dd1fa3d38cf9ff92c65e862b9bf"}}