{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:GHBY4Y4CBL5KV6B4IW3LWUBBLD","short_pith_number":"pith:GHBY4Y4C","canonical_record":{"source":{"id":"2406.00387","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2024-06-01T10:00:01Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"8298264a1137dfa4ea1bb3fb4e08eb5b0e6c874f7c956424fd90bdcec4c0e26b","abstract_canon_sha256":"091e40ee3a31f8ad766e40c65de89aacdf6f30ea5ff30b1304609a149462250f"},"schema_version":"1.0"},"canonical_sha256":"31c38e63820afaaaf83c45b6bb502158e1045878328329f3bc2fd9c1395738e0","source":{"kind":"arxiv","id":"2406.00387","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2406.00387","created_at":"2026-07-05T09:19:57Z"},{"alias_kind":"arxiv_version","alias_value":"2406.00387v2","created_at":"2026-07-05T09:19:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2406.00387","created_at":"2026-07-05T09:19:57Z"},{"alias_kind":"pith_short_12","alias_value":"GHBY4Y4CBL5K","created_at":"2026-07-05T09:19:57Z"},{"alias_kind":"pith_short_16","alias_value":"GHBY4Y4CBL5KV6B4","created_at":"2026-07-05T09:19:57Z"},{"alias_kind":"pith_short_8","alias_value":"GHBY4Y4C","created_at":"2026-07-05T09:19:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:GHBY4Y4CBL5KV6B4IW3LWUBBLD","target":"record","payload":{"canonical_record":{"source":{"id":"2406.00387","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2024-06-01T10:00:01Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"8298264a1137dfa4ea1bb3fb4e08eb5b0e6c874f7c956424fd90bdcec4c0e26b","abstract_canon_sha256":"091e40ee3a31f8ad766e40c65de89aacdf6f30ea5ff30b1304609a149462250f"},"schema_version":"1.0"},"canonical_sha256":"31c38e63820afaaaf83c45b6bb502158e1045878328329f3bc2fd9c1395738e0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:19:57.974681Z","signature_b64":"MJPT2UAFe10CtP70aJKEC0NQdgMk42hEkjgvyCBWK3ufq83a/7PmBnqar50nj4IwrEXcLtBjZkyIY6+V4MYmAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"31c38e63820afaaaf83c45b6bb502158e1045878328329f3bc2fd9c1395738e0","last_reissued_at":"2026-07-05T09:19:57.974214Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:19:57.974214Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2406.00387","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":"2026-07-05T09:19:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"APr/AYQj6+urpIYSeiYUnCpsXhzEzf5N/Ow2sAUi/tnkaF6CvaX1WAOxmUtzfuH79UK+auaT87x0NTU2mD71CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T05:59:41.486879Z"},"content_sha256":"9138205f7d64b915b727a29e5df1e8b8ef85ca57e8569620b77c6e9959698216","schema_version":"1.0","event_id":"sha256:9138205f7d64b915b727a29e5df1e8b8ef85ca57e8569620b77c6e9959698216"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:GHBY4Y4CBL5KV6B4IW3LWUBBLD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Upper limit on the axion-photon coupling from Markarian 421","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"hep-ph","authors_text":"Hai-Jun Li, Wei Chao, Yu-Feng Zhou","submitted_at":"2024-06-01T10:00:01Z","abstract_excerpt":"Markarian 421 is a well-known nearby BL Lac blazar at the redshift $z=0.031$. Many previous works were investigated to constrain the axion-photon coupling from its TeV gamma-ray observations, showing the upper limit on the coupling constant $g_{a\\gamma} \\lesssim 2.0\\times 10^{-11} \\rm \\, GeV^{-1}$ for the axion mass $[5.0\\times10^{-10} \\, {\\rm eV} \\lesssim m_a \\lesssim 5.0\\times10^{-7} \\, {\\rm eV}]$. While in this work, we obtain a more stringent upper limit on the axion-photon coupling from the 1038 days gamma-ray observations of the blazar Markarian 421. The long-term gamma-ray spectra are m"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2406.00387","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/2406.00387/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":"2026-07-05T09:19:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wO86Fv9aQq/ivxBhWUTfU1s2k/mJSZyO8lnGmzzPX01yvnZLx+XH2ykIu48UQycSe3JlOVvdgNv5vtS01xc+Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T05:59:41.487828Z"},"content_sha256":"6746954a1a8d7f7971bb34215f604fe7b0b5c83b4092912d40bf1f62021ba384","schema_version":"1.0","event_id":"sha256:6746954a1a8d7f7971bb34215f604fe7b0b5c83b4092912d40bf1f62021ba384"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GHBY4Y4CBL5KV6B4IW3LWUBBLD/bundle.json","state_url":"https://pith.science/pith/GHBY4Y4CBL5KV6B4IW3LWUBBLD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GHBY4Y4CBL5KV6B4IW3LWUBBLD/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":"2026-08-17T05:59:41Z","links":{"resolver":"https://pith.science/pith/GHBY4Y4CBL5KV6B4IW3LWUBBLD","bundle":"https://pith.science/pith/GHBY4Y4CBL5KV6B4IW3LWUBBLD/bundle.json","state":"https://pith.science/pith/GHBY4Y4CBL5KV6B4IW3LWUBBLD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GHBY4Y4CBL5KV6B4IW3LWUBBLD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:GHBY4Y4CBL5KV6B4IW3LWUBBLD","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":"091e40ee3a31f8ad766e40c65de89aacdf6f30ea5ff30b1304609a149462250f","cross_cats_sorted":["astro-ph.HE"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2024-06-01T10:00:01Z","title_canon_sha256":"8298264a1137dfa4ea1bb3fb4e08eb5b0e6c874f7c956424fd90bdcec4c0e26b"},"schema_version":"1.0","source":{"id":"2406.00387","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2406.00387","created_at":"2026-07-05T09:19:57Z"},{"alias_kind":"arxiv_version","alias_value":"2406.00387v2","created_at":"2026-07-05T09:19:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2406.00387","created_at":"2026-07-05T09:19:57Z"},{"alias_kind":"pith_short_12","alias_value":"GHBY4Y4CBL5K","created_at":"2026-07-05T09:19:57Z"},{"alias_kind":"pith_short_16","alias_value":"GHBY4Y4CBL5KV6B4","created_at":"2026-07-05T09:19:57Z"},{"alias_kind":"pith_short_8","alias_value":"GHBY4Y4C","created_at":"2026-07-05T09:19:57Z"}],"graph_snapshots":[{"event_id":"sha256:6746954a1a8d7f7971bb34215f604fe7b0b5c83b4092912d40bf1f62021ba384","target":"graph","created_at":"2026-07-05T09:19:57Z","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/2406.00387/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Markarian 421 is a well-known nearby BL Lac blazar at the redshift $z=0.031$. Many previous works were investigated to constrain the axion-photon coupling from its TeV gamma-ray observations, showing the upper limit on the coupling constant $g_{a\\gamma} \\lesssim 2.0\\times 10^{-11} \\rm \\, GeV^{-1}$ for the axion mass $[5.0\\times10^{-10} \\, {\\rm eV} \\lesssim m_a \\lesssim 5.0\\times10^{-7} \\, {\\rm eV}]$. While in this work, we obtain a more stringent upper limit on the axion-photon coupling from the 1038 days gamma-ray observations of the blazar Markarian 421. The long-term gamma-ray spectra are m","authors_text":"Hai-Jun Li, Wei Chao, Yu-Feng Zhou","cross_cats":["astro-ph.HE"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2024-06-01T10:00:01Z","title":"Upper limit on the axion-photon coupling from Markarian 421"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2406.00387","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":"sha256:9138205f7d64b915b727a29e5df1e8b8ef85ca57e8569620b77c6e9959698216","target":"record","created_at":"2026-07-05T09:19:57Z","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":"091e40ee3a31f8ad766e40c65de89aacdf6f30ea5ff30b1304609a149462250f","cross_cats_sorted":["astro-ph.HE"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2024-06-01T10:00:01Z","title_canon_sha256":"8298264a1137dfa4ea1bb3fb4e08eb5b0e6c874f7c956424fd90bdcec4c0e26b"},"schema_version":"1.0","source":{"id":"2406.00387","kind":"arxiv","version":2}},"canonical_sha256":"31c38e63820afaaaf83c45b6bb502158e1045878328329f3bc2fd9c1395738e0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"31c38e63820afaaaf83c45b6bb502158e1045878328329f3bc2fd9c1395738e0","first_computed_at":"2026-07-05T09:19:57.974214Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:19:57.974214Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MJPT2UAFe10CtP70aJKEC0NQdgMk42hEkjgvyCBWK3ufq83a/7PmBnqar50nj4IwrEXcLtBjZkyIY6+V4MYmAA==","signature_status":"signed_v1","signed_at":"2026-07-05T09:19:57.974681Z","signed_message":"canonical_sha256_bytes"},"source_id":"2406.00387","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9138205f7d64b915b727a29e5df1e8b8ef85ca57e8569620b77c6e9959698216","sha256:6746954a1a8d7f7971bb34215f604fe7b0b5c83b4092912d40bf1f62021ba384"],"state_sha256":"d25c4e0d5ced6bfd4c83d439fa31e93806f4fbcea5b6fd9be88c3ef585e1c44c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ukMqlB80Hyz9VXKXmmhZozWsEA5HNzijxQDRff5MhnwEfvOA8tu04RvEkJYF1KS0XtPkQFIvFxddpJtM6S+kDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T05:59:41.493706Z","bundle_sha256":"5c647a869ae6813a0353a166d5241a90c632066b14befe621cf41458d2b9ac47"}}