{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:IV57AZSD7YECHQ3D7UDR42OQE5","short_pith_number":"pith:IV57AZSD","canonical_record":{"source":{"id":"1707.03656","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-07-12T11:32:59Z","cross_cats_sorted":[],"title_canon_sha256":"ac78d47912b1b3af26494e61c7c879fa038ce3e22575b93b308f795c8cbf7b44","abstract_canon_sha256":"d4e22b3c61f16a5f50a2d06f439802a723bf1b8556752e3e3cccf08661a9de63"},"schema_version":"1.0"},"canonical_sha256":"457bf06643fe0823c363fd071e69d0275235b3aabe0c91ddf5034e174ea5132f","source":{"kind":"arxiv","id":"1707.03656","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.03656","created_at":"2026-05-18T00:40:25Z"},{"alias_kind":"arxiv_version","alias_value":"1707.03656v1","created_at":"2026-05-18T00:40:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.03656","created_at":"2026-05-18T00:40:25Z"},{"alias_kind":"pith_short_12","alias_value":"IV57AZSD7YEC","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_16","alias_value":"IV57AZSD7YECHQ3D","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_8","alias_value":"IV57AZSD","created_at":"2026-05-18T12:31:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:IV57AZSD7YECHQ3D7UDR42OQE5","target":"record","payload":{"canonical_record":{"source":{"id":"1707.03656","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-07-12T11:32:59Z","cross_cats_sorted":[],"title_canon_sha256":"ac78d47912b1b3af26494e61c7c879fa038ce3e22575b93b308f795c8cbf7b44","abstract_canon_sha256":"d4e22b3c61f16a5f50a2d06f439802a723bf1b8556752e3e3cccf08661a9de63"},"schema_version":"1.0"},"canonical_sha256":"457bf06643fe0823c363fd071e69d0275235b3aabe0c91ddf5034e174ea5132f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:40:25.382423Z","signature_b64":"0903ASubxmDol8tvwo8hJf4s+9duo8USI8btVrfyY9NOZbLu8XyZ1DJVW3BMUaEfeXzsAO2GamHc51bPw/nwBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"457bf06643fe0823c363fd071e69d0275235b3aabe0c91ddf5034e174ea5132f","last_reissued_at":"2026-05-18T00:40:25.381912Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:40:25.381912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1707.03656","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":"2026-05-18T00:40:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EFwfNOJJrV9za2uDC5wHTDBnq2GUKjbM14YE31qzXcEtK7jnZA4zd/tivvcsnmnTZjzhvcBKvfRYFdv06kVYCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T15:02:48.287790Z"},"content_sha256":"fb644607e2f79e5af542a17fc2c8b2905b3e246943e4ed610811fc4c43ba7ade","schema_version":"1.0","event_id":"sha256:fb644607e2f79e5af542a17fc2c8b2905b3e246943e4ed610811fc4c43ba7ade"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:IV57AZSD7YECHQ3D7UDR42OQE5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A search for peculiar stars in the open cluster Hogg 16","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Ernst Paunzen, L\\'ydia \\v{S}tofanov\\'a, Martin Netopil, Naira M. Azatyan, Olga I. Pintado, Petr Kurf\\\"urst, Stefano Cariddi, Yael J. Aidelman","submitted_at":"2017-07-12T11:32:59Z","abstract_excerpt":"The study of chemically peculiar (CP) stars in open clusters provides valuable information about their evolutionary status. Their detection can be performed using the $\\Delta a$ photometric system, which maps a characteristic flux depression at $\\lambda \\sim 5200$ \\AA. This paper aims at studying the occurrence of CP stars in the earliest stages of evolution of a stellar population by applying this technique to Hogg 16, a very young Galactic open cluster (about 25 Myr). We identified several peculiar candidates: two B-type stars with a negative $\\Delta a$ index (CD-60 4701, CPD-60 4706) are li"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.03656","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":"2026-05-18T00:40:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a4K0iRaWWPMYJzzh7syxHBftxEMy94Kj/fKvNBa2DvVurnN7g7HNDbJol/YyPKYQe4XEt7Cy4J5wantFuGV2CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T15:02:48.288478Z"},"content_sha256":"3289b42fbd51fa289997b788be58cb10b9a2c6a9307a5a60177474485d9f5013","schema_version":"1.0","event_id":"sha256:3289b42fbd51fa289997b788be58cb10b9a2c6a9307a5a60177474485d9f5013"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IV57AZSD7YECHQ3D7UDR42OQE5/bundle.json","state_url":"https://pith.science/pith/IV57AZSD7YECHQ3D7UDR42OQE5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IV57AZSD7YECHQ3D7UDR42OQE5/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":"2026-05-28T15:02:48Z","links":{"resolver":"https://pith.science/pith/IV57AZSD7YECHQ3D7UDR42OQE5","bundle":"https://pith.science/pith/IV57AZSD7YECHQ3D7UDR42OQE5/bundle.json","state":"https://pith.science/pith/IV57AZSD7YECHQ3D7UDR42OQE5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IV57AZSD7YECHQ3D7UDR42OQE5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:IV57AZSD7YECHQ3D7UDR42OQE5","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":"d4e22b3c61f16a5f50a2d06f439802a723bf1b8556752e3e3cccf08661a9de63","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-07-12T11:32:59Z","title_canon_sha256":"ac78d47912b1b3af26494e61c7c879fa038ce3e22575b93b308f795c8cbf7b44"},"schema_version":"1.0","source":{"id":"1707.03656","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.03656","created_at":"2026-05-18T00:40:25Z"},{"alias_kind":"arxiv_version","alias_value":"1707.03656v1","created_at":"2026-05-18T00:40:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.03656","created_at":"2026-05-18T00:40:25Z"},{"alias_kind":"pith_short_12","alias_value":"IV57AZSD7YEC","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_16","alias_value":"IV57AZSD7YECHQ3D","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_8","alias_value":"IV57AZSD","created_at":"2026-05-18T12:31:21Z"}],"graph_snapshots":[{"event_id":"sha256:3289b42fbd51fa289997b788be58cb10b9a2c6a9307a5a60177474485d9f5013","target":"graph","created_at":"2026-05-18T00:40:25Z","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 study of chemically peculiar (CP) stars in open clusters provides valuable information about their evolutionary status. Their detection can be performed using the $\\Delta a$ photometric system, which maps a characteristic flux depression at $\\lambda \\sim 5200$ \\AA. This paper aims at studying the occurrence of CP stars in the earliest stages of evolution of a stellar population by applying this technique to Hogg 16, a very young Galactic open cluster (about 25 Myr). We identified several peculiar candidates: two B-type stars with a negative $\\Delta a$ index (CD-60 4701, CPD-60 4706) are li","authors_text":"Ernst Paunzen, L\\'ydia \\v{S}tofanov\\'a, Martin Netopil, Naira M. Azatyan, Olga I. Pintado, Petr Kurf\\\"urst, Stefano Cariddi, Yael J. Aidelman","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-07-12T11:32:59Z","title":"A search for peculiar stars in the open cluster Hogg 16"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.03656","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:fb644607e2f79e5af542a17fc2c8b2905b3e246943e4ed610811fc4c43ba7ade","target":"record","created_at":"2026-05-18T00:40:25Z","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":"d4e22b3c61f16a5f50a2d06f439802a723bf1b8556752e3e3cccf08661a9de63","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-07-12T11:32:59Z","title_canon_sha256":"ac78d47912b1b3af26494e61c7c879fa038ce3e22575b93b308f795c8cbf7b44"},"schema_version":"1.0","source":{"id":"1707.03656","kind":"arxiv","version":1}},"canonical_sha256":"457bf06643fe0823c363fd071e69d0275235b3aabe0c91ddf5034e174ea5132f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"457bf06643fe0823c363fd071e69d0275235b3aabe0c91ddf5034e174ea5132f","first_computed_at":"2026-05-18T00:40:25.381912Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:40:25.381912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0903ASubxmDol8tvwo8hJf4s+9duo8USI8btVrfyY9NOZbLu8XyZ1DJVW3BMUaEfeXzsAO2GamHc51bPw/nwBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:40:25.382423Z","signed_message":"canonical_sha256_bytes"},"source_id":"1707.03656","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fb644607e2f79e5af542a17fc2c8b2905b3e246943e4ed610811fc4c43ba7ade","sha256:3289b42fbd51fa289997b788be58cb10b9a2c6a9307a5a60177474485d9f5013"],"state_sha256":"4b7c31a9e6a3541d54a2f79979e1166a1e8fd00345625413759fb914bcbb910c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Q2Oat56gATGABz9XqymQqwWOZ4Qr3zmbdtp/DsHFp8mwFjfEKSIC7BGab3dPBX6Y3+TEtTUhqk6o/79wOfEiBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T15:02:48.291531Z","bundle_sha256":"91292a081e1c4a36a835c51f1b9190c11394de5243c4057b788b32ba262fe77c"}}