{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1997:VKGHR5DJGQCQBKODY3JK7XTAKJ","short_pith_number":"pith:VKGHR5DJ","canonical_record":{"source":{"id":"astro-ph/9708218","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1997-08-24T00:24:59Z","cross_cats_sorted":[],"title_canon_sha256":"529330ff58c70ae91c892910ddc06059ab3dc9acb05f7c34bac3c04504a11ca3","abstract_canon_sha256":"435f46a6484cdc3c84840d9d194fa6a565e241c08237fdd5748d8f6f5a5171e2"},"schema_version":"1.0"},"canonical_sha256":"aa8c78f469340500a9c3c6d2afde60525bd4f9566229c77696024dd38df889ca","source":{"kind":"arxiv","id":"astro-ph/9708218","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9708218","created_at":"2026-05-18T01:40:16Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9708218v1","created_at":"2026-05-18T01:40:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9708218","created_at":"2026-05-18T01:40:16Z"},{"alias_kind":"pith_short_12","alias_value":"VKGHR5DJGQCQ","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"VKGHR5DJGQCQBKOD","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"VKGHR5DJ","created_at":"2026-05-18T12:25:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1997:VKGHR5DJGQCQBKODY3JK7XTAKJ","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9708218","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1997-08-24T00:24:59Z","cross_cats_sorted":[],"title_canon_sha256":"529330ff58c70ae91c892910ddc06059ab3dc9acb05f7c34bac3c04504a11ca3","abstract_canon_sha256":"435f46a6484cdc3c84840d9d194fa6a565e241c08237fdd5748d8f6f5a5171e2"},"schema_version":"1.0"},"canonical_sha256":"aa8c78f469340500a9c3c6d2afde60525bd4f9566229c77696024dd38df889ca","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:16.814530Z","signature_b64":"5LTnREiaDYXi/BrkicTMm/qMtCstvYzwUHKThsH9+7VQDeVkRVH7I1kU77B7PMLNiL0lGqAVnvz5HPxD6wzaAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"aa8c78f469340500a9c3c6d2afde60525bd4f9566229c77696024dd38df889ca","last_reissued_at":"2026-05-18T01:40:16.813812Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:16.813812Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9708218","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":"2026-05-18T01:40:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PZ4HTAxco+v0S22IfyqnCcXOS8mTxUuJ92RHiUZJKL0076IoX+vuGRnr15D0s8aa8MiYvd0ytlWu6b2xP8u/Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T03:00:52.503746Z"},"content_sha256":"db88332873916f1781f2448c3e9a602c2346828b40f8cb7b283d57fc6f051bad","schema_version":"1.0","event_id":"sha256:db88332873916f1781f2448c3e9a602c2346828b40f8cb7b283d57fc6f051bad"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1997:VKGHR5DJGQCQBKODY3JK7XTAKJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Data-Mining a Large Digital Sky Survey: From the Challenges to the Scientific Results","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"(2) Jet Propulsion Laboratory, 3), (3) Observatorio Nacional CNPq, A. Gray (2) ((1) Palomar Observatory, J. Roden (2), P. Stolorz (2), Rio de Janeiro), R. R. de Carvalho (1, R. R. Gal (1), S. C. Odewahn (1), S. G. Djorgovski (1)","submitted_at":"1997-08-24T00:24:59Z","abstract_excerpt":"The analysis and an efficient scientific exploration of the Digital Palomar Observatory Sky Survey (DPOSS) represents a major technical challenge. The input data set consists of 3 Terabytes of pixel information, and contains a few billion sources. We describe some of the specific scientific problems posed by the data, including searches for distant quasars and clusters of galaxies, and the data-mining techniques we are exploring in addressing them. Machine-assisted discovery methods may become essential for the analysis of such multi-Terabyte data sets. New and future approaches involve unsupe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9708218","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":"2026-05-18T01:40:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+shW/M1Ypvp0f5dvQS8/u2v06gmX4p+Q6FVHW91jDsNrEmiFeNDS0LrpAV7KU7+Xc6t5+wzcBHVeiXjj2OhFBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T03:00:52.504415Z"},"content_sha256":"a66717fe74b2879453a62c4064422bdbd968ef2bd5ebda1fbfa8c13a5eb3564f","schema_version":"1.0","event_id":"sha256:a66717fe74b2879453a62c4064422bdbd968ef2bd5ebda1fbfa8c13a5eb3564f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VKGHR5DJGQCQBKODY3JK7XTAKJ/bundle.json","state_url":"https://pith.science/pith/VKGHR5DJGQCQBKODY3JK7XTAKJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VKGHR5DJGQCQBKODY3JK7XTAKJ/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":"2026-06-04T03:00:52Z","links":{"resolver":"https://pith.science/pith/VKGHR5DJGQCQBKODY3JK7XTAKJ","bundle":"https://pith.science/pith/VKGHR5DJGQCQBKODY3JK7XTAKJ/bundle.json","state":"https://pith.science/pith/VKGHR5DJGQCQBKODY3JK7XTAKJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VKGHR5DJGQCQBKODY3JK7XTAKJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:VKGHR5DJGQCQBKODY3JK7XTAKJ","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":"435f46a6484cdc3c84840d9d194fa6a565e241c08237fdd5748d8f6f5a5171e2","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1997-08-24T00:24:59Z","title_canon_sha256":"529330ff58c70ae91c892910ddc06059ab3dc9acb05f7c34bac3c04504a11ca3"},"schema_version":"1.0","source":{"id":"astro-ph/9708218","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9708218","created_at":"2026-05-18T01:40:16Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9708218v1","created_at":"2026-05-18T01:40:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9708218","created_at":"2026-05-18T01:40:16Z"},{"alias_kind":"pith_short_12","alias_value":"VKGHR5DJGQCQ","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"VKGHR5DJGQCQBKOD","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"VKGHR5DJ","created_at":"2026-05-18T12:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:a66717fe74b2879453a62c4064422bdbd968ef2bd5ebda1fbfa8c13a5eb3564f","target":"graph","created_at":"2026-05-18T01:40:16Z","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 analysis and an efficient scientific exploration of the Digital Palomar Observatory Sky Survey (DPOSS) represents a major technical challenge. The input data set consists of 3 Terabytes of pixel information, and contains a few billion sources. We describe some of the specific scientific problems posed by the data, including searches for distant quasars and clusters of galaxies, and the data-mining techniques we are exploring in addressing them. Machine-assisted discovery methods may become essential for the analysis of such multi-Terabyte data sets. New and future approaches involve unsupe","authors_text":"(2) Jet Propulsion Laboratory, 3), (3) Observatorio Nacional CNPq, A. Gray (2) ((1) Palomar Observatory, J. Roden (2), P. Stolorz (2), Rio de Janeiro), R. R. de Carvalho (1, R. R. Gal (1), S. C. Odewahn (1), S. G. Djorgovski (1)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1997-08-24T00:24:59Z","title":"Data-Mining a Large Digital Sky Survey: From the Challenges to the Scientific Results"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9708218","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:db88332873916f1781f2448c3e9a602c2346828b40f8cb7b283d57fc6f051bad","target":"record","created_at":"2026-05-18T01:40:16Z","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":"435f46a6484cdc3c84840d9d194fa6a565e241c08237fdd5748d8f6f5a5171e2","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1997-08-24T00:24:59Z","title_canon_sha256":"529330ff58c70ae91c892910ddc06059ab3dc9acb05f7c34bac3c04504a11ca3"},"schema_version":"1.0","source":{"id":"astro-ph/9708218","kind":"arxiv","version":1}},"canonical_sha256":"aa8c78f469340500a9c3c6d2afde60525bd4f9566229c77696024dd38df889ca","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aa8c78f469340500a9c3c6d2afde60525bd4f9566229c77696024dd38df889ca","first_computed_at":"2026-05-18T01:40:16.813812Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:16.813812Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5LTnREiaDYXi/BrkicTMm/qMtCstvYzwUHKThsH9+7VQDeVkRVH7I1kU77B7PMLNiL0lGqAVnvz5HPxD6wzaAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:16.814530Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9708218","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:db88332873916f1781f2448c3e9a602c2346828b40f8cb7b283d57fc6f051bad","sha256:a66717fe74b2879453a62c4064422bdbd968ef2bd5ebda1fbfa8c13a5eb3564f"],"state_sha256":"1aa3d6b7934090f1b2af23793da2ad874deab23463010dc546e28e1e1323e683"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"H7/ZGF0BWFdPB2fMpOiYmFRkPPHXfXagT+L+WTPUSEOfRkfFONTTYKT5k4sdUvd5c8igX8PWWt7Yn3aljSLmDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T03:00:52.507576Z","bundle_sha256":"409752949c9783fc7edc1575d9b09fd9b74b58118a7b68cf42ed8d97e6b64f91"}}