{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:OFP73HL5ZYHTPRJS2FVWLGEPTG","short_pith_number":"pith:OFP73HL5","canonical_record":{"source":{"id":"1712.01284","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-12-04T19:00:01Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"8a8369551c155f61059c6ef0700df8d6571da5149c5589e6b7e8eeb04c36307c","abstract_canon_sha256":"fc42ecf98244d82722bdcad6600a74ef90f66d0d7e6edeb75a8e0e0fb3c0e33c"},"schema_version":"1.0"},"canonical_sha256":"715ffd9d7dce0f37c532d16b65988f99a47cf0c8068c10a245ade146500391d4","source":{"kind":"arxiv","id":"1712.01284","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.01284","created_at":"2026-05-18T00:28:51Z"},{"alias_kind":"arxiv_version","alias_value":"1712.01284v1","created_at":"2026-05-18T00:28:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.01284","created_at":"2026-05-18T00:28:51Z"},{"alias_kind":"pith_short_12","alias_value":"OFP73HL5ZYHT","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"OFP73HL5ZYHTPRJS","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"OFP73HL5","created_at":"2026-05-18T12:31:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:OFP73HL5ZYHTPRJS2FVWLGEPTG","target":"record","payload":{"canonical_record":{"source":{"id":"1712.01284","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-12-04T19:00:01Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"8a8369551c155f61059c6ef0700df8d6571da5149c5589e6b7e8eeb04c36307c","abstract_canon_sha256":"fc42ecf98244d82722bdcad6600a74ef90f66d0d7e6edeb75a8e0e0fb3c0e33c"},"schema_version":"1.0"},"canonical_sha256":"715ffd9d7dce0f37c532d16b65988f99a47cf0c8068c10a245ade146500391d4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:28:51.201602Z","signature_b64":"aT8BJN9rQJOuXAP6In2x6yVON2UqZNrk/tK5jl+VkOCpmdOVZU8tC+o1pz4c2xdpJbizEV/B4fNQ6J74Ty+NBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"715ffd9d7dce0f37c532d16b65988f99a47cf0c8068c10a245ade146500391d4","last_reissued_at":"2026-05-18T00:28:51.200977Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:28:51.200977Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1712.01284","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":"2026-05-18T00:28:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qFQ7/trBVHja2T9Lc7uSLAHzT5mGdhN3rHmG6HAjlAG7S+BLTDcBOtDdKGlHG7MYtbEKkZXQzKG3EkPl4FyYAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T04:00:09.014328Z"},"content_sha256":"1e65bfc4f92424162bece49c827d3dda40a03530abd5dfe885318982ae0ea9d3","schema_version":"1.0","event_id":"sha256:1e65bfc4f92424162bece49c827d3dda40a03530abd5dfe885318982ae0ea9d3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:OFP73HL5ZYHTPRJS2FVWLGEPTG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"M13 multiple stellar populations seen with the eyes of Str\\\"omgren photometry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"A. Bragaglia, A. Savino, D. Massari, E. Dalessandro, E. Tolstoy","submitted_at":"2017-12-04T19:00:01Z","abstract_excerpt":"We present a photometric study of M13 multiple stellar populations over a wide field of view, covering approximately 6.5 half-light radii, using archival Isaac Newton Telescope observations to build an accurate multi-band Str\\\"omgren catalogue. The use of the Str\\\"omgren index $c_{y}$ permits us to separate the multiple populations of M13 on the basis of their position on the red giant branch. The comparison with medium and high resolution spectroscopic analysis confirms the robustness of our selection criterion. To determine the radial distribution of stars in M13, we complemented our dataset"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.01284","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":"2026-05-18T00:28:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uzjIsTasiy6RzKDGU3kJhoNkYBDTiElBgtfwNujlp3d3xLWJHvKWvEYOuTN2Ea7viJpgXk0UKo66UN6rmftfDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T04:00:09.014933Z"},"content_sha256":"e34ca77e2d1e5089ff26cd987684894d54b7e0bae7a1c11edb36c4f6a7892713","schema_version":"1.0","event_id":"sha256:e34ca77e2d1e5089ff26cd987684894d54b7e0bae7a1c11edb36c4f6a7892713"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OFP73HL5ZYHTPRJS2FVWLGEPTG/bundle.json","state_url":"https://pith.science/pith/OFP73HL5ZYHTPRJS2FVWLGEPTG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OFP73HL5ZYHTPRJS2FVWLGEPTG/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":"2026-06-07T04:00:09Z","links":{"resolver":"https://pith.science/pith/OFP73HL5ZYHTPRJS2FVWLGEPTG","bundle":"https://pith.science/pith/OFP73HL5ZYHTPRJS2FVWLGEPTG/bundle.json","state":"https://pith.science/pith/OFP73HL5ZYHTPRJS2FVWLGEPTG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OFP73HL5ZYHTPRJS2FVWLGEPTG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:OFP73HL5ZYHTPRJS2FVWLGEPTG","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":"fc42ecf98244d82722bdcad6600a74ef90f66d0d7e6edeb75a8e0e0fb3c0e33c","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-12-04T19:00:01Z","title_canon_sha256":"8a8369551c155f61059c6ef0700df8d6571da5149c5589e6b7e8eeb04c36307c"},"schema_version":"1.0","source":{"id":"1712.01284","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.01284","created_at":"2026-05-18T00:28:51Z"},{"alias_kind":"arxiv_version","alias_value":"1712.01284v1","created_at":"2026-05-18T00:28:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.01284","created_at":"2026-05-18T00:28:51Z"},{"alias_kind":"pith_short_12","alias_value":"OFP73HL5ZYHT","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"OFP73HL5ZYHTPRJS","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"OFP73HL5","created_at":"2026-05-18T12:31:34Z"}],"graph_snapshots":[{"event_id":"sha256:e34ca77e2d1e5089ff26cd987684894d54b7e0bae7a1c11edb36c4f6a7892713","target":"graph","created_at":"2026-05-18T00:28:51Z","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":"We present a photometric study of M13 multiple stellar populations over a wide field of view, covering approximately 6.5 half-light radii, using archival Isaac Newton Telescope observations to build an accurate multi-band Str\\\"omgren catalogue. The use of the Str\\\"omgren index $c_{y}$ permits us to separate the multiple populations of M13 on the basis of their position on the red giant branch. The comparison with medium and high resolution spectroscopic analysis confirms the robustness of our selection criterion. To determine the radial distribution of stars in M13, we complemented our dataset","authors_text":"A. Bragaglia, A. Savino, D. Massari, E. Dalessandro, E. Tolstoy","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-12-04T19:00:01Z","title":"M13 multiple stellar populations seen with the eyes of Str\\\"omgren photometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.01284","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":"sha256:1e65bfc4f92424162bece49c827d3dda40a03530abd5dfe885318982ae0ea9d3","target":"record","created_at":"2026-05-18T00:28:51Z","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":"fc42ecf98244d82722bdcad6600a74ef90f66d0d7e6edeb75a8e0e0fb3c0e33c","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-12-04T19:00:01Z","title_canon_sha256":"8a8369551c155f61059c6ef0700df8d6571da5149c5589e6b7e8eeb04c36307c"},"schema_version":"1.0","source":{"id":"1712.01284","kind":"arxiv","version":1}},"canonical_sha256":"715ffd9d7dce0f37c532d16b65988f99a47cf0c8068c10a245ade146500391d4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"715ffd9d7dce0f37c532d16b65988f99a47cf0c8068c10a245ade146500391d4","first_computed_at":"2026-05-18T00:28:51.200977Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:28:51.200977Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aT8BJN9rQJOuXAP6In2x6yVON2UqZNrk/tK5jl+VkOCpmdOVZU8tC+o1pz4c2xdpJbizEV/B4fNQ6J74Ty+NBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:28:51.201602Z","signed_message":"canonical_sha256_bytes"},"source_id":"1712.01284","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1e65bfc4f92424162bece49c827d3dda40a03530abd5dfe885318982ae0ea9d3","sha256:e34ca77e2d1e5089ff26cd987684894d54b7e0bae7a1c11edb36c4f6a7892713"],"state_sha256":"b930bbd339c5a34560a87caa2647a58b11066e5dbaea52ae7c69c01ae1fa227f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8G0dN3cfzWrQHJ/KlVLSb6ADFqAqrZ6yK6ZVvhxayWUfW/RFZ/L6t+ZxcLqusSV7JOvOhljdmiwa3ZI76LHMBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T04:00:09.017777Z","bundle_sha256":"c3692c943a17efb3f780c838f51f5fe90040129822d496af004fb0187277e757"}}