{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:WKZYFPYESU6JKECTUTMJBY4HBX","short_pith_number":"pith:WKZYFPYE","canonical_record":{"source":{"id":"1812.01019","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-12-03T19:00:05Z","cross_cats_sorted":[],"title_canon_sha256":"a102e0ba36196c9e9395c5fa282c24d0f063c4230a02c35674eceef1a994cb19","abstract_canon_sha256":"522e568b66d8624c9b0934c563ac47a73826ac1e306fcbc592ab9e7fea5668ce"},"schema_version":"1.0"},"canonical_sha256":"b2b382bf04953c951053a4d890e3870dff67d6ec7b6529f92e32e8e480ab5ced","source":{"kind":"arxiv","id":"1812.01019","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.01019","created_at":"2026-05-17T23:43:37Z"},{"alias_kind":"arxiv_version","alias_value":"1812.01019v1","created_at":"2026-05-17T23:43:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.01019","created_at":"2026-05-17T23:43:37Z"},{"alias_kind":"pith_short_12","alias_value":"WKZYFPYESU6J","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"WKZYFPYESU6JKECT","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"WKZYFPYE","created_at":"2026-05-18T12:33:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:WKZYFPYESU6JKECTUTMJBY4HBX","target":"record","payload":{"canonical_record":{"source":{"id":"1812.01019","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-12-03T19:00:05Z","cross_cats_sorted":[],"title_canon_sha256":"a102e0ba36196c9e9395c5fa282c24d0f063c4230a02c35674eceef1a994cb19","abstract_canon_sha256":"522e568b66d8624c9b0934c563ac47a73826ac1e306fcbc592ab9e7fea5668ce"},"schema_version":"1.0"},"canonical_sha256":"b2b382bf04953c951053a4d890e3870dff67d6ec7b6529f92e32e8e480ab5ced","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:43:37.668566Z","signature_b64":"pDkEiLrpIJoWpbNHVONdEYq8qGl0edfTt/VD9GRyJsNTWKCOVF4T6yvtzkt2n6p7eI52OMVBVJGEByS5fXo0Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b2b382bf04953c951053a4d890e3870dff67d6ec7b6529f92e32e8e480ab5ced","last_reissued_at":"2026-05-17T23:43:37.667967Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:43:37.667967Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.01019","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":"2026-05-17T23:43:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NX9PlDSSnGrhTjJk195FfpuIEe7XckgrMaECSibWJqWo01mCYT8V7F0ibPZJarAGFciUC3Xg0WBnLFTMZ3jXBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T22:14:00.594923Z"},"content_sha256":"cf6f1a55fb55216dece6d20d7ae68eaa8aafa0985027a40bda2d4068d1235b1c","schema_version":"1.0","event_id":"sha256:cf6f1a55fb55216dece6d20d7ae68eaa8aafa0985027a40bda2d4068d1235b1c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:WKZYFPYESU6JKECTUTMJBY4HBX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Next Generation Virgo Cluster Survey. XXIII. Fundamentals of nuclear star clusters over seven decades in galaxy mass","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Boselli, A. Lan\\c{c}on, B. Miller, C. Liu, C. Spengler, E. Emsellem, E. Toloba, E.W. Peng, J.-C. Cuillandre, J.C. Mihos, J.P. Blakeslee, J. Roediger, J. Taylor, K.A. \\'Alamo-Mart\\'inez, L.A. MacArthur, L. Ferrarese, M. Cantiello, M. Powalka, P.-A. Duc, P. C\\^ot\\'e, P. Durrell, R. Mu\\~noz, R. S\\'anchez-Janssen, S. Gwyn, S. Lim, S. Mei, S. Paudel, T.H. Puzia","submitted_at":"2018-12-03T19:00:05Z","abstract_excerpt":"Using deep, high resolution optical imaging from the Next Generation Virgo Cluster Survey we study the properties of nuclear star clusters (NSCs) in a sample of nearly 400 quiescent galaxies in the core of Virgo with stellar masses $10^{5}\\lesssim M_{*}/M_{\\odot} \\lesssim10^{12}$. The nucleation fraction reaches a peak value $f_{n}\\approx90\\%$ for $M_{*} \\approx 10^{9} M_{\\odot}$ galaxies and declines for both higher and lower masses, but nuclei populate galaxies as small as $M_{*} \\approx5\\times10^{5} M_{\\odot}$. Comparison with literature data for nearby groups and clusters shows that at the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.01019","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":"2026-05-17T23:43:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xQJXAuW2G4cYbSvKKqw7Ogy3MM5HkU36iFFxE6d2/Zci9/bZho5TfJK0f1JPl17hMNJiEw56qVHmSz2TrNMbAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T22:14:00.595641Z"},"content_sha256":"6bd9d4f9994394785aff9b85a9a8c190b410a9d80489b3ed88cdbca7ba10fc18","schema_version":"1.0","event_id":"sha256:6bd9d4f9994394785aff9b85a9a8c190b410a9d80489b3ed88cdbca7ba10fc18"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WKZYFPYESU6JKECTUTMJBY4HBX/bundle.json","state_url":"https://pith.science/pith/WKZYFPYESU6JKECTUTMJBY4HBX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WKZYFPYESU6JKECTUTMJBY4HBX/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":"2026-05-31T22:14:00Z","links":{"resolver":"https://pith.science/pith/WKZYFPYESU6JKECTUTMJBY4HBX","bundle":"https://pith.science/pith/WKZYFPYESU6JKECTUTMJBY4HBX/bundle.json","state":"https://pith.science/pith/WKZYFPYESU6JKECTUTMJBY4HBX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WKZYFPYESU6JKECTUTMJBY4HBX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:WKZYFPYESU6JKECTUTMJBY4HBX","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":"522e568b66d8624c9b0934c563ac47a73826ac1e306fcbc592ab9e7fea5668ce","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-12-03T19:00:05Z","title_canon_sha256":"a102e0ba36196c9e9395c5fa282c24d0f063c4230a02c35674eceef1a994cb19"},"schema_version":"1.0","source":{"id":"1812.01019","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.01019","created_at":"2026-05-17T23:43:37Z"},{"alias_kind":"arxiv_version","alias_value":"1812.01019v1","created_at":"2026-05-17T23:43:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.01019","created_at":"2026-05-17T23:43:37Z"},{"alias_kind":"pith_short_12","alias_value":"WKZYFPYESU6J","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"WKZYFPYESU6JKECT","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"WKZYFPYE","created_at":"2026-05-18T12:33:01Z"}],"graph_snapshots":[{"event_id":"sha256:6bd9d4f9994394785aff9b85a9a8c190b410a9d80489b3ed88cdbca7ba10fc18","target":"graph","created_at":"2026-05-17T23:43:37Z","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":"Using deep, high resolution optical imaging from the Next Generation Virgo Cluster Survey we study the properties of nuclear star clusters (NSCs) in a sample of nearly 400 quiescent galaxies in the core of Virgo with stellar masses $10^{5}\\lesssim M_{*}/M_{\\odot} \\lesssim10^{12}$. The nucleation fraction reaches a peak value $f_{n}\\approx90\\%$ for $M_{*} \\approx 10^{9} M_{\\odot}$ galaxies and declines for both higher and lower masses, but nuclei populate galaxies as small as $M_{*} \\approx5\\times10^{5} M_{\\odot}$. Comparison with literature data for nearby groups and clusters shows that at the","authors_text":"A. Boselli, A. Lan\\c{c}on, B. Miller, C. Liu, C. Spengler, E. Emsellem, E. Toloba, E.W. Peng, J.-C. Cuillandre, J.C. Mihos, J.P. Blakeslee, J. Roediger, J. Taylor, K.A. \\'Alamo-Mart\\'inez, L.A. MacArthur, L. Ferrarese, M. Cantiello, M. Powalka, P.-A. Duc, P. C\\^ot\\'e, P. Durrell, R. Mu\\~noz, R. S\\'anchez-Janssen, S. Gwyn, S. Lim, S. Mei, S. Paudel, T.H. Puzia","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-12-03T19:00:05Z","title":"The Next Generation Virgo Cluster Survey. XXIII. Fundamentals of nuclear star clusters over seven decades in galaxy mass"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.01019","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:cf6f1a55fb55216dece6d20d7ae68eaa8aafa0985027a40bda2d4068d1235b1c","target":"record","created_at":"2026-05-17T23:43:37Z","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":"522e568b66d8624c9b0934c563ac47a73826ac1e306fcbc592ab9e7fea5668ce","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-12-03T19:00:05Z","title_canon_sha256":"a102e0ba36196c9e9395c5fa282c24d0f063c4230a02c35674eceef1a994cb19"},"schema_version":"1.0","source":{"id":"1812.01019","kind":"arxiv","version":1}},"canonical_sha256":"b2b382bf04953c951053a4d890e3870dff67d6ec7b6529f92e32e8e480ab5ced","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b2b382bf04953c951053a4d890e3870dff67d6ec7b6529f92e32e8e480ab5ced","first_computed_at":"2026-05-17T23:43:37.667967Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:37.667967Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pDkEiLrpIJoWpbNHVONdEYq8qGl0edfTt/VD9GRyJsNTWKCOVF4T6yvtzkt2n6p7eI52OMVBVJGEByS5fXo0Dw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:37.668566Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.01019","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cf6f1a55fb55216dece6d20d7ae68eaa8aafa0985027a40bda2d4068d1235b1c","sha256:6bd9d4f9994394785aff9b85a9a8c190b410a9d80489b3ed88cdbca7ba10fc18"],"state_sha256":"ca37aaee54824b3dcfa1ec235d804d2be89e7ebc62e6c2cf90ee376496f48d7b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z5q9bpXF5r4E2ApGA4WIWS2o1PXVv4xU6nM2qG9LH+e99kYHReyqQr2kD9Xp9aoM16mCCtc15Jt3yhsqgIW+DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T22:14:00.599037Z","bundle_sha256":"372bcfcb4790764b343163d9261d369efc484ccfe45ff0d851457d923ec16771"}}