{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:UVGJWTPXLKDUSKNQ73RBMCMZUA","short_pith_number":"pith:UVGJWTPX","canonical_record":{"source":{"id":"2501.07443","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-01-13T16:11:32Z","cross_cats_sorted":[],"title_canon_sha256":"cde351005792750c1fdfff8d2818b7c7298b997a923c18323ca75c817425dfb5","abstract_canon_sha256":"d37db9f9fbb2939fe5a862c68bc7302d6e7d2ab879ebe5cc47292e94af03f6ab"},"schema_version":"1.0"},"canonical_sha256":"a54c9b4df75a874929b0fee2160999a01e94365c9f6186073f9527582a49fe1f","source":{"kind":"arxiv","id":"2501.07443","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.07443","created_at":"2026-07-05T10:00:28Z"},{"alias_kind":"arxiv_version","alias_value":"2501.07443v1","created_at":"2026-07-05T10:00:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.07443","created_at":"2026-07-05T10:00:28Z"},{"alias_kind":"pith_short_12","alias_value":"UVGJWTPXLKDU","created_at":"2026-07-05T10:00:28Z"},{"alias_kind":"pith_short_16","alias_value":"UVGJWTPXLKDUSKNQ","created_at":"2026-07-05T10:00:28Z"},{"alias_kind":"pith_short_8","alias_value":"UVGJWTPX","created_at":"2026-07-05T10:00:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:UVGJWTPXLKDUSKNQ73RBMCMZUA","target":"record","payload":{"canonical_record":{"source":{"id":"2501.07443","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-01-13T16:11:32Z","cross_cats_sorted":[],"title_canon_sha256":"cde351005792750c1fdfff8d2818b7c7298b997a923c18323ca75c817425dfb5","abstract_canon_sha256":"d37db9f9fbb2939fe5a862c68bc7302d6e7d2ab879ebe5cc47292e94af03f6ab"},"schema_version":"1.0"},"canonical_sha256":"a54c9b4df75a874929b0fee2160999a01e94365c9f6186073f9527582a49fe1f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:00:28.576760Z","signature_b64":"IIkOFPGA66sX/kzecdD4lh9JofPfI0RW5WHbTLrqeRyoykQPRzLg9FHm/gcPYueUDIN7QX2ROZMZ2RbfJNzvBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a54c9b4df75a874929b0fee2160999a01e94365c9f6186073f9527582a49fe1f","last_reissued_at":"2026-07-05T10:00:28.576117Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:00:28.576117Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2501.07443","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":"2026-07-05T10:00:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FnBHw7SNLkTcUddBGOGjvuRJkEZNdctTAASoqQ5aDUQ8GDJgwCjDwrgEpFxKI6ZMjtUkxKCFvwup1TV7S46mDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-08T07:39:20.269260Z"},"content_sha256":"7393d9bfafb2ce6ac3f9c342c58d7c6bd96277b6537007727b288b3c5b1b8cde","schema_version":"1.0","event_id":"sha256:7393d9bfafb2ce6ac3f9c342c58d7c6bd96277b6537007727b288b3c5b1b8cde"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:UVGJWTPXLKDUSKNQ73RBMCMZUA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Metal-THINGS: The Milky Way twin candidate NGC 3521","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"G. Tautvaisiene, G. Vale, I.A. Zinchenko, J. Zaragoza-Cardiel, L.R. Garduno, L.S. Pilyugin, M.A. Lara-Lopez, M.E. De Rossi, S. Dib","submitted_at":"2025-01-13T16:11:32Z","abstract_excerpt":"The 3D spectrophotometry measurements of the galaxy NGC~3521, a structural Milky Way analogue (sMWA), were carried out within the Metal-THINGS project. We found that the oxygen abundance in the inner part of NGC~3521 is at a nearly constant level and the O/H gradient is negative at larger radii. The change in the N/H with radius is similar to that for O/H. The radial distributions of the O/H, the gas mass fraction, and the effective oxygen yield in NGC~3521 are compared to that of the Milky Way (MW), with the aim of examining the similarity in their chemical evolutions. The O/H of two HII regi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.07443","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/2501.07443/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":"2026-07-05T10:00:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gaAnWhFgxrLbA90nmOyGmwS8UjBqzRWubqAwzE+7zw5kDkRba4zMx4A/zg1o2ip5tknlqguPqxvWat/6BZ8DAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-08T07:39:20.270217Z"},"content_sha256":"8ef747f28dd15511f219de219696ce0d17fdaf37ebede5c8ee0713335e24cff4","schema_version":"1.0","event_id":"sha256:8ef747f28dd15511f219de219696ce0d17fdaf37ebede5c8ee0713335e24cff4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UVGJWTPXLKDUSKNQ73RBMCMZUA/bundle.json","state_url":"https://pith.science/pith/UVGJWTPXLKDUSKNQ73RBMCMZUA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UVGJWTPXLKDUSKNQ73RBMCMZUA/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":"2026-07-08T07:39:20Z","links":{"resolver":"https://pith.science/pith/UVGJWTPXLKDUSKNQ73RBMCMZUA","bundle":"https://pith.science/pith/UVGJWTPXLKDUSKNQ73RBMCMZUA/bundle.json","state":"https://pith.science/pith/UVGJWTPXLKDUSKNQ73RBMCMZUA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UVGJWTPXLKDUSKNQ73RBMCMZUA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:UVGJWTPXLKDUSKNQ73RBMCMZUA","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":"d37db9f9fbb2939fe5a862c68bc7302d6e7d2ab879ebe5cc47292e94af03f6ab","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-01-13T16:11:32Z","title_canon_sha256":"cde351005792750c1fdfff8d2818b7c7298b997a923c18323ca75c817425dfb5"},"schema_version":"1.0","source":{"id":"2501.07443","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.07443","created_at":"2026-07-05T10:00:28Z"},{"alias_kind":"arxiv_version","alias_value":"2501.07443v1","created_at":"2026-07-05T10:00:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.07443","created_at":"2026-07-05T10:00:28Z"},{"alias_kind":"pith_short_12","alias_value":"UVGJWTPXLKDU","created_at":"2026-07-05T10:00:28Z"},{"alias_kind":"pith_short_16","alias_value":"UVGJWTPXLKDUSKNQ","created_at":"2026-07-05T10:00:28Z"},{"alias_kind":"pith_short_8","alias_value":"UVGJWTPX","created_at":"2026-07-05T10:00:28Z"}],"graph_snapshots":[{"event_id":"sha256:8ef747f28dd15511f219de219696ce0d17fdaf37ebede5c8ee0713335e24cff4","target":"graph","created_at":"2026-07-05T10:00:28Z","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/2501.07443/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The 3D spectrophotometry measurements of the galaxy NGC~3521, a structural Milky Way analogue (sMWA), were carried out within the Metal-THINGS project. We found that the oxygen abundance in the inner part of NGC~3521 is at a nearly constant level and the O/H gradient is negative at larger radii. The change in the N/H with radius is similar to that for O/H. The radial distributions of the O/H, the gas mass fraction, and the effective oxygen yield in NGC~3521 are compared to that of the Milky Way (MW), with the aim of examining the similarity in their chemical evolutions. The O/H of two HII regi","authors_text":"G. Tautvaisiene, G. Vale, I.A. Zinchenko, J. Zaragoza-Cardiel, L.R. Garduno, L.S. Pilyugin, M.A. Lara-Lopez, M.E. De Rossi, S. Dib","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-01-13T16:11:32Z","title":"Metal-THINGS: The Milky Way twin candidate NGC 3521"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.07443","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":"sha256:7393d9bfafb2ce6ac3f9c342c58d7c6bd96277b6537007727b288b3c5b1b8cde","target":"record","created_at":"2026-07-05T10:00:28Z","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":"d37db9f9fbb2939fe5a862c68bc7302d6e7d2ab879ebe5cc47292e94af03f6ab","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-01-13T16:11:32Z","title_canon_sha256":"cde351005792750c1fdfff8d2818b7c7298b997a923c18323ca75c817425dfb5"},"schema_version":"1.0","source":{"id":"2501.07443","kind":"arxiv","version":1}},"canonical_sha256":"a54c9b4df75a874929b0fee2160999a01e94365c9f6186073f9527582a49fe1f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a54c9b4df75a874929b0fee2160999a01e94365c9f6186073f9527582a49fe1f","first_computed_at":"2026-07-05T10:00:28.576117Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:00:28.576117Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IIkOFPGA66sX/kzecdD4lh9JofPfI0RW5WHbTLrqeRyoykQPRzLg9FHm/gcPYueUDIN7QX2ROZMZ2RbfJNzvBg==","signature_status":"signed_v1","signed_at":"2026-07-05T10:00:28.576760Z","signed_message":"canonical_sha256_bytes"},"source_id":"2501.07443","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7393d9bfafb2ce6ac3f9c342c58d7c6bd96277b6537007727b288b3c5b1b8cde","sha256:8ef747f28dd15511f219de219696ce0d17fdaf37ebede5c8ee0713335e24cff4"],"state_sha256":"b8205658087723d5d688ee38f9eef971ac5fdaaad8723aab0df9e1a124fcef3f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XOSmRhG5sDPpjHPcI1zqbMBLstJc+HJIMjaE60gv+ksfZJizIoZLTU5qucnpP76EFxy8zLrmsj3Y8rqxCQ5xAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-08T07:39:20.273932Z","bundle_sha256":"97a8278e063b215d02263bb0158e7d4a7991cdff4e484b5ed6ea45647a595f30"}}