{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2006:KPCLNUA7KXMHSKP4TLFQGGEYGR","short_pith_number":"pith:KPCLNUA7","canonical_record":{"source":{"id":"astro-ph/0606337","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-06-14T04:57:24Z","cross_cats_sorted":[],"title_canon_sha256":"9fe8322546d1aefe9f15ce79615c39bf0f3bd9bb6a8a6cad121d41358bf836be","abstract_canon_sha256":"3435f000f8fa23e2f7efc2a7435f06d11993b5d723e0e175bc1f373355a84162"},"schema_version":"1.0"},"canonical_sha256":"53c4b6d01f55d87929fc9acb031898344ba7adc8e466492fa28b8c3aafb03643","source":{"kind":"arxiv","id":"astro-ph/0606337","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0606337","created_at":"2026-07-04T15:25:48Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0606337v2","created_at":"2026-07-04T15:25:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0606337","created_at":"2026-07-04T15:25:48Z"},{"alias_kind":"pith_short_12","alias_value":"KPCLNUA7KXMH","created_at":"2026-07-04T15:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"KPCLNUA7KXMHSKP4","created_at":"2026-07-04T15:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"KPCLNUA7","created_at":"2026-07-04T15:25:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2006:KPCLNUA7KXMHSKP4TLFQGGEYGR","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0606337","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-06-14T04:57:24Z","cross_cats_sorted":[],"title_canon_sha256":"9fe8322546d1aefe9f15ce79615c39bf0f3bd9bb6a8a6cad121d41358bf836be","abstract_canon_sha256":"3435f000f8fa23e2f7efc2a7435f06d11993b5d723e0e175bc1f373355a84162"},"schema_version":"1.0"},"canonical_sha256":"53c4b6d01f55d87929fc9acb031898344ba7adc8e466492fa28b8c3aafb03643","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:25:48.910264Z","signature_b64":"NTxeLROq5sspHlhHlzFdUNdfCNT1iJCSN24oatBL1k5oFk0xGSG/pTtHKGPSlYn/CCSA+ANv2+ihcInooHSbAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"53c4b6d01f55d87929fc9acb031898344ba7adc8e466492fa28b8c3aafb03643","last_reissued_at":"2026-07-04T15:25:48.909766Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:25:48.909766Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0606337","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T15:25:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4duiElUpIuU+yX4nvxIKARUXvBlhVJ1lG07L2pFjX+wcU08FJQrjIZ5AsQAmEC8eq/m72Vv1SlPXNSV2BHlsBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T00:23:51.614445Z"},"content_sha256":"7933613fb1368f406c621666307fd24f144120217b702e370e45e23c0c84d4a2","schema_version":"1.0","event_id":"sha256:7933613fb1368f406c621666307fd24f144120217b702e370e45e23c0c84d4a2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2006:KPCLNUA7KXMHSKP4TLFQGGEYGR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"HST/ACS Wide-Field Photometry of the Sombrero Galaxy Globular Cluster System","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"D. A. Forbes, J. P. Brodie, J. Strader, L. R. Spitler, M. A. Beasley, S. S. Larsen","submitted_at":"2006-06-14T04:57:24Z","abstract_excerpt":"A detailed imaging analysis of the globular cluster (GC) system of the Sombrero galaxy (NGC 4594) has been accomplished using a six-image mosaic from the Hubble Space Telescope Advanced Camera for Surveys. The quality of the data is such that contamination by foreground stars and background galaxies is negligible for all but the faintest 5% of the GC luminosity function (GCLF). This enables the study of an effectively pure sample of 659 GCs until ~2 mags fainter than the turnover magnitude, which occurs at M_V=-7.60+/-0.06 for an assumed m-M=29.77. Two GC metallicity subpopulations are easily "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0606337","kind":"arxiv","version":2},"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/astro-ph/0606337/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":"2026-07-04T15:25:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zxwj2YGTIsnZZskE9J8ZbgpzBH7O1YbLPe9DHbPeLLWbKrW1KbW1LjMjUKiIBHTlP4DkqYwMNxfk+WFmyTHHBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T00:23:51.614831Z"},"content_sha256":"6d0b053033d27cc1f772ee43e904f77c7a280cae5200919f05b8081b13f20c53","schema_version":"1.0","event_id":"sha256:6d0b053033d27cc1f772ee43e904f77c7a280cae5200919f05b8081b13f20c53"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KPCLNUA7KXMHSKP4TLFQGGEYGR/bundle.json","state_url":"https://pith.science/pith/KPCLNUA7KXMHSKP4TLFQGGEYGR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KPCLNUA7KXMHSKP4TLFQGGEYGR/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":"2026-07-05T00:23:51Z","links":{"resolver":"https://pith.science/pith/KPCLNUA7KXMHSKP4TLFQGGEYGR","bundle":"https://pith.science/pith/KPCLNUA7KXMHSKP4TLFQGGEYGR/bundle.json","state":"https://pith.science/pith/KPCLNUA7KXMHSKP4TLFQGGEYGR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KPCLNUA7KXMHSKP4TLFQGGEYGR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:KPCLNUA7KXMHSKP4TLFQGGEYGR","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":"3435f000f8fa23e2f7efc2a7435f06d11993b5d723e0e175bc1f373355a84162","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-06-14T04:57:24Z","title_canon_sha256":"9fe8322546d1aefe9f15ce79615c39bf0f3bd9bb6a8a6cad121d41358bf836be"},"schema_version":"1.0","source":{"id":"astro-ph/0606337","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0606337","created_at":"2026-07-04T15:25:48Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0606337v2","created_at":"2026-07-04T15:25:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0606337","created_at":"2026-07-04T15:25:48Z"},{"alias_kind":"pith_short_12","alias_value":"KPCLNUA7KXMH","created_at":"2026-07-04T15:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"KPCLNUA7KXMHSKP4","created_at":"2026-07-04T15:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"KPCLNUA7","created_at":"2026-07-04T15:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:6d0b053033d27cc1f772ee43e904f77c7a280cae5200919f05b8081b13f20c53","target":"graph","created_at":"2026-07-04T15:25:48Z","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/astro-ph/0606337/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A detailed imaging analysis of the globular cluster (GC) system of the Sombrero galaxy (NGC 4594) has been accomplished using a six-image mosaic from the Hubble Space Telescope Advanced Camera for Surveys. The quality of the data is such that contamination by foreground stars and background galaxies is negligible for all but the faintest 5% of the GC luminosity function (GCLF). This enables the study of an effectively pure sample of 659 GCs until ~2 mags fainter than the turnover magnitude, which occurs at M_V=-7.60+/-0.06 for an assumed m-M=29.77. Two GC metallicity subpopulations are easily ","authors_text":"D. A. Forbes, J. P. Brodie, J. Strader, L. R. Spitler, M. A. Beasley, S. S. Larsen","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2006-06-14T04:57:24Z","title":"HST/ACS Wide-Field Photometry of the Sombrero Galaxy Globular Cluster System"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0606337","kind":"arxiv","version":2},"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":"sha256:7933613fb1368f406c621666307fd24f144120217b702e370e45e23c0c84d4a2","target":"record","created_at":"2026-07-04T15:25:48Z","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":"3435f000f8fa23e2f7efc2a7435f06d11993b5d723e0e175bc1f373355a84162","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-06-14T04:57:24Z","title_canon_sha256":"9fe8322546d1aefe9f15ce79615c39bf0f3bd9bb6a8a6cad121d41358bf836be"},"schema_version":"1.0","source":{"id":"astro-ph/0606337","kind":"arxiv","version":2}},"canonical_sha256":"53c4b6d01f55d87929fc9acb031898344ba7adc8e466492fa28b8c3aafb03643","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"53c4b6d01f55d87929fc9acb031898344ba7adc8e466492fa28b8c3aafb03643","first_computed_at":"2026-07-04T15:25:48.909766Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:25:48.909766Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NTxeLROq5sspHlhHlzFdUNdfCNT1iJCSN24oatBL1k5oFk0xGSG/pTtHKGPSlYn/CCSA+ANv2+ihcInooHSbAw==","signature_status":"signed_v1","signed_at":"2026-07-04T15:25:48.910264Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0606337","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7933613fb1368f406c621666307fd24f144120217b702e370e45e23c0c84d4a2","sha256:6d0b053033d27cc1f772ee43e904f77c7a280cae5200919f05b8081b13f20c53"],"state_sha256":"45dc4ab00cda7b3b469404a1a9134430a2d994721f14566282b31fac8759f6b7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gOa8d/M7r2eIUlQ9p2FSRcAO1g+J7Zo91HORzc6WuQa99Vuv93kq2uk3w6GOApFdPE398a0/93vWApBHI2/WAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T00:23:51.616981Z","bundle_sha256":"12ebf0d2d042eec7d01d057a0e21e89fe5fd49e8b04f3530393186d98fc90a6c"}}