{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:XVDH5PJOZL7GK27ADPBN6TTZDX","short_pith_number":"pith:XVDH5PJO","canonical_record":{"source":{"id":"0910.3296","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-10-19T13:01:14Z","cross_cats_sorted":[],"title_canon_sha256":"c9f7c98a3a66f38cef24c077089eabc27da9ce0f268e057715380f5311bc473a","abstract_canon_sha256":"c0fffa7f73c3d6643672b01e8c39b95f57fd29c59b6205c94229da9cb5235046"},"schema_version":"1.0"},"canonical_sha256":"bd467ebd2ecafe656be01bc2df4e791de81458f16bb0b84903ba0fb4fb166f88","source":{"kind":"arxiv","id":"0910.3296","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.3296","created_at":"2026-05-18T02:34:18Z"},{"alias_kind":"arxiv_version","alias_value":"0910.3296v1","created_at":"2026-05-18T02:34:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.3296","created_at":"2026-05-18T02:34:18Z"},{"alias_kind":"pith_short_12","alias_value":"XVDH5PJOZL7G","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"XVDH5PJOZL7GK27A","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"XVDH5PJO","created_at":"2026-05-18T12:26:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:XVDH5PJOZL7GK27ADPBN6TTZDX","target":"record","payload":{"canonical_record":{"source":{"id":"0910.3296","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-10-19T13:01:14Z","cross_cats_sorted":[],"title_canon_sha256":"c9f7c98a3a66f38cef24c077089eabc27da9ce0f268e057715380f5311bc473a","abstract_canon_sha256":"c0fffa7f73c3d6643672b01e8c39b95f57fd29c59b6205c94229da9cb5235046"},"schema_version":"1.0"},"canonical_sha256":"bd467ebd2ecafe656be01bc2df4e791de81458f16bb0b84903ba0fb4fb166f88","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:34:18.482666Z","signature_b64":"zxcPjDW/QYBCtIU6b6ARpIsBH0KdL9dWJcygLlRyIyMIslIOPSqfQyjShbVXAyIQlcWfR1gkvCsQNHtUOByHAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bd467ebd2ecafe656be01bc2df4e791de81458f16bb0b84903ba0fb4fb166f88","last_reissued_at":"2026-05-18T02:34:18.482197Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:34:18.482197Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0910.3296","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":"2026-05-18T02:34:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UuUryjmt6dCoWz3CdANnna+SL2v23pWgUgK9NnyHYG92Ml59VhHX7iTH58+rF4DFDbJETaGk5EIbnCRh/fEBAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T18:48:28.162041Z"},"content_sha256":"64229e11ad70bf00312f039409c568b7b9cceb762784109397153e3db0a6b176","schema_version":"1.0","event_id":"sha256:64229e11ad70bf00312f039409c568b7b9cceb762784109397153e3db0a6b176"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:XVDH5PJOZL7GK27ADPBN6TTZDX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Variable Stars in the Globular Cluster NGC 6752","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Ian B. Thompson, Janusz Kaluzny","submitted_at":"2009-10-19T13:01:14Z","abstract_excerpt":"We report time-series photometry for 16 variable stars located in the central part of the globular cluster NGC 6752. The sample includes 13 newly identified objects. The precision of our differential photometry ranges from 1 mmag at V=14.0 to 10 mmag at V=18.0. We detected 4 low amplitude variables located on the extended horizontal branch (EHB) of the cluster. They are candidate binary stars harboring sdB subdwarfs. A candidate degenerate binary was detected about 2 mag below the faint end of the EHB. The star is blue and its light curve is modulated with a period of 0.47 d. We argue that som"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.3296","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":"2026-05-18T02:34:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0eRixJVwwExxG8wKf7OuzfJajKBcg99ahwQsWkbZXX61qgKvqFJjBsoF3/cnEDpqxTUcVOrLs/Z1/1FISi68Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T18:48:28.162414Z"},"content_sha256":"c9c8aaa50c1362b4a70cb44000ad01a871e72dcd255545f22cf7cb6839064913","schema_version":"1.0","event_id":"sha256:c9c8aaa50c1362b4a70cb44000ad01a871e72dcd255545f22cf7cb6839064913"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XVDH5PJOZL7GK27ADPBN6TTZDX/bundle.json","state_url":"https://pith.science/pith/XVDH5PJOZL7GK27ADPBN6TTZDX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XVDH5PJOZL7GK27ADPBN6TTZDX/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":"2026-05-30T18:48:28Z","links":{"resolver":"https://pith.science/pith/XVDH5PJOZL7GK27ADPBN6TTZDX","bundle":"https://pith.science/pith/XVDH5PJOZL7GK27ADPBN6TTZDX/bundle.json","state":"https://pith.science/pith/XVDH5PJOZL7GK27ADPBN6TTZDX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XVDH5PJOZL7GK27ADPBN6TTZDX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:XVDH5PJOZL7GK27ADPBN6TTZDX","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":"c0fffa7f73c3d6643672b01e8c39b95f57fd29c59b6205c94229da9cb5235046","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-10-19T13:01:14Z","title_canon_sha256":"c9f7c98a3a66f38cef24c077089eabc27da9ce0f268e057715380f5311bc473a"},"schema_version":"1.0","source":{"id":"0910.3296","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.3296","created_at":"2026-05-18T02:34:18Z"},{"alias_kind":"arxiv_version","alias_value":"0910.3296v1","created_at":"2026-05-18T02:34:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.3296","created_at":"2026-05-18T02:34:18Z"},{"alias_kind":"pith_short_12","alias_value":"XVDH5PJOZL7G","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"XVDH5PJOZL7GK27A","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"XVDH5PJO","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:c9c8aaa50c1362b4a70cb44000ad01a871e72dcd255545f22cf7cb6839064913","target":"graph","created_at":"2026-05-18T02:34:18Z","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 report time-series photometry for 16 variable stars located in the central part of the globular cluster NGC 6752. The sample includes 13 newly identified objects. The precision of our differential photometry ranges from 1 mmag at V=14.0 to 10 mmag at V=18.0. We detected 4 low amplitude variables located on the extended horizontal branch (EHB) of the cluster. They are candidate binary stars harboring sdB subdwarfs. A candidate degenerate binary was detected about 2 mag below the faint end of the EHB. The star is blue and its light curve is modulated with a period of 0.47 d. We argue that som","authors_text":"Ian B. Thompson, Janusz Kaluzny","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-10-19T13:01:14Z","title":"Variable Stars in the Globular Cluster NGC 6752"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.3296","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":"sha256:64229e11ad70bf00312f039409c568b7b9cceb762784109397153e3db0a6b176","target":"record","created_at":"2026-05-18T02:34:18Z","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":"c0fffa7f73c3d6643672b01e8c39b95f57fd29c59b6205c94229da9cb5235046","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-10-19T13:01:14Z","title_canon_sha256":"c9f7c98a3a66f38cef24c077089eabc27da9ce0f268e057715380f5311bc473a"},"schema_version":"1.0","source":{"id":"0910.3296","kind":"arxiv","version":1}},"canonical_sha256":"bd467ebd2ecafe656be01bc2df4e791de81458f16bb0b84903ba0fb4fb166f88","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bd467ebd2ecafe656be01bc2df4e791de81458f16bb0b84903ba0fb4fb166f88","first_computed_at":"2026-05-18T02:34:18.482197Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:34:18.482197Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zxcPjDW/QYBCtIU6b6ARpIsBH0KdL9dWJcygLlRyIyMIslIOPSqfQyjShbVXAyIQlcWfR1gkvCsQNHtUOByHAA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:34:18.482666Z","signed_message":"canonical_sha256_bytes"},"source_id":"0910.3296","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:64229e11ad70bf00312f039409c568b7b9cceb762784109397153e3db0a6b176","sha256:c9c8aaa50c1362b4a70cb44000ad01a871e72dcd255545f22cf7cb6839064913"],"state_sha256":"ccf570c7a798983f13187b14ebbcec29f8cda29fbdba824e02eb6bf2396e5897"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a6ykYFsiyzxOBPnbNADvoaVWJTP89kYx9CJSpW+7CUQbFHef3Y4dEIl/tAPBtupybsBr4awFoLoA38AF2Ae/Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T18:48:28.164881Z","bundle_sha256":"ba1ab20b536a9378fa4866d0966c784ca13c0829936b3504d0ca87b23279b831"}}