{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2001:D3KUKTWZJKIYFDEP76JNDMX4PE","short_pith_number":"pith:D3KUKTWZ","canonical_record":{"source":{"id":"astro-ph/0104123","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-04-06T20:05:51Z","cross_cats_sorted":[],"title_canon_sha256":"c5869288abd19444b00eb70f4849443c9f9997af39aae8fc67a762949ee77876","abstract_canon_sha256":"54defaea1d1dcc7138f609764f10deb85ec8a2bf4e3c6c0457d80730d80b95f6"},"schema_version":"1.0"},"canonical_sha256":"1ed5454ed94a91828c8fff92d1b2fc791f2209e362b0b483813db00f576d772c","source":{"kind":"arxiv","id":"astro-ph/0104123","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0104123","created_at":"2026-07-04T16:23:00Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0104123v1","created_at":"2026-07-04T16:23:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0104123","created_at":"2026-07-04T16:23:00Z"},{"alias_kind":"pith_short_12","alias_value":"D3KUKTWZJKIY","created_at":"2026-07-04T16:23:00Z"},{"alias_kind":"pith_short_16","alias_value":"D3KUKTWZJKIYFDEP","created_at":"2026-07-04T16:23:00Z"},{"alias_kind":"pith_short_8","alias_value":"D3KUKTWZ","created_at":"2026-07-04T16:23:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2001:D3KUKTWZJKIYFDEP76JNDMX4PE","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0104123","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-04-06T20:05:51Z","cross_cats_sorted":[],"title_canon_sha256":"c5869288abd19444b00eb70f4849443c9f9997af39aae8fc67a762949ee77876","abstract_canon_sha256":"54defaea1d1dcc7138f609764f10deb85ec8a2bf4e3c6c0457d80730d80b95f6"},"schema_version":"1.0"},"canonical_sha256":"1ed5454ed94a91828c8fff92d1b2fc791f2209e362b0b483813db00f576d772c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:23:00.523513Z","signature_b64":"xIAQyXhEEXttOA2bNN55KoPnjMpBgmknFhI7CpxZsivPNTsfQaDTasc8gkXTGegIpIH886f4s7zy+7wDnc9XDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1ed5454ed94a91828c8fff92d1b2fc791f2209e362b0b483813db00f576d772c","last_reissued_at":"2026-07-04T16:23:00.523117Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:23:00.523117Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0104123","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":"2026-07-04T16:23:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q+CLDmXSdo12FMyJqALSltV8v26oypthysBeG/emk2uK6xe/wYaFGe8v8Pzwq7WQ3X0Xd6j4y9ZxK0F5B9xzCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T00:49:14.146332Z"},"content_sha256":"1969d8ce7861d28b449838a79661d3f1a01263f258bcd272edbabe7fd4fcf89f","schema_version":"1.0","event_id":"sha256:1969d8ce7861d28b449838a79661d3f1a01263f258bcd272edbabe7fd4fcf89f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2001:D3KUKTWZJKIYFDEP76JNDMX4PE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Investigation of Gravitational Lens Mass Models","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Adam Knudson, Kavan U. Ratnatunga, Richard E. Griffith (Carnegie Mellon University)","submitted_at":"2001-04-06T20:05:51Z","abstract_excerpt":"We have previously reported the discovery of strong gravitational lensing by faint elliptical galaxies using the WFPC2 on HST and here we investigate their potential usefulness in putting constraints on lens mass models. We compare various ellipsoidal surface mass distributions, including those with and without a core radius, as well as models in which the mass distributions are assumed to have the same axis ratio and orientation as the galaxy light. We also study models which use a spherical mass distribution having various profiles, both empirical and following those predicted by CDM simulat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0104123","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0104123/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":"2026-07-04T16:23:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wk7BR475J66rVm4JDqQOAKz2Y2mScqOo7Ju/Oev86RmpxEVnyY+SYpP1vgKBML85mfHupGLhZOv0zS1Yj+9mBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T00:49:14.146863Z"},"content_sha256":"7125e44ad275326a8c76992a2bc3404c5dea73bc20a615435e2658a38a0986e4","schema_version":"1.0","event_id":"sha256:7125e44ad275326a8c76992a2bc3404c5dea73bc20a615435e2658a38a0986e4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/D3KUKTWZJKIYFDEP76JNDMX4PE/bundle.json","state_url":"https://pith.science/pith/D3KUKTWZJKIYFDEP76JNDMX4PE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/D3KUKTWZJKIYFDEP76JNDMX4PE/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":"2026-08-13T00:49:14Z","links":{"resolver":"https://pith.science/pith/D3KUKTWZJKIYFDEP76JNDMX4PE","bundle":"https://pith.science/pith/D3KUKTWZJKIYFDEP76JNDMX4PE/bundle.json","state":"https://pith.science/pith/D3KUKTWZJKIYFDEP76JNDMX4PE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/D3KUKTWZJKIYFDEP76JNDMX4PE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:D3KUKTWZJKIYFDEP76JNDMX4PE","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":"54defaea1d1dcc7138f609764f10deb85ec8a2bf4e3c6c0457d80730d80b95f6","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-04-06T20:05:51Z","title_canon_sha256":"c5869288abd19444b00eb70f4849443c9f9997af39aae8fc67a762949ee77876"},"schema_version":"1.0","source":{"id":"astro-ph/0104123","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0104123","created_at":"2026-07-04T16:23:00Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0104123v1","created_at":"2026-07-04T16:23:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0104123","created_at":"2026-07-04T16:23:00Z"},{"alias_kind":"pith_short_12","alias_value":"D3KUKTWZJKIY","created_at":"2026-07-04T16:23:00Z"},{"alias_kind":"pith_short_16","alias_value":"D3KUKTWZJKIYFDEP","created_at":"2026-07-04T16:23:00Z"},{"alias_kind":"pith_short_8","alias_value":"D3KUKTWZ","created_at":"2026-07-04T16:23:00Z"}],"graph_snapshots":[{"event_id":"sha256:7125e44ad275326a8c76992a2bc3404c5dea73bc20a615435e2658a38a0986e4","target":"graph","created_at":"2026-07-04T16:23:00Z","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/0104123/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We have previously reported the discovery of strong gravitational lensing by faint elliptical galaxies using the WFPC2 on HST and here we investigate their potential usefulness in putting constraints on lens mass models. We compare various ellipsoidal surface mass distributions, including those with and without a core radius, as well as models in which the mass distributions are assumed to have the same axis ratio and orientation as the galaxy light. We also study models which use a spherical mass distribution having various profiles, both empirical and following those predicted by CDM simulat","authors_text":"Adam Knudson, Kavan U. Ratnatunga, Richard E. Griffith (Carnegie Mellon University)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2001-04-06T20:05:51Z","title":"Investigation of Gravitational Lens Mass Models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0104123","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":"sha256:1969d8ce7861d28b449838a79661d3f1a01263f258bcd272edbabe7fd4fcf89f","target":"record","created_at":"2026-07-04T16:23:00Z","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":"54defaea1d1dcc7138f609764f10deb85ec8a2bf4e3c6c0457d80730d80b95f6","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-04-06T20:05:51Z","title_canon_sha256":"c5869288abd19444b00eb70f4849443c9f9997af39aae8fc67a762949ee77876"},"schema_version":"1.0","source":{"id":"astro-ph/0104123","kind":"arxiv","version":1}},"canonical_sha256":"1ed5454ed94a91828c8fff92d1b2fc791f2209e362b0b483813db00f576d772c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1ed5454ed94a91828c8fff92d1b2fc791f2209e362b0b483813db00f576d772c","first_computed_at":"2026-07-04T16:23:00.523117Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:23:00.523117Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xIAQyXhEEXttOA2bNN55KoPnjMpBgmknFhI7CpxZsivPNTsfQaDTasc8gkXTGegIpIH886f4s7zy+7wDnc9XDQ==","signature_status":"signed_v1","signed_at":"2026-07-04T16:23:00.523513Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0104123","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1969d8ce7861d28b449838a79661d3f1a01263f258bcd272edbabe7fd4fcf89f","sha256:7125e44ad275326a8c76992a2bc3404c5dea73bc20a615435e2658a38a0986e4"],"state_sha256":"f3be140428ca7fb42ab6641bea854c01ac21e7e1528694c729b3b557660fdaba"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GLI9BfQ6T5+xRtOh6ylfJVuoqupfUMApcmtN5QJVycJXpJPJdliEBGcWR46dnsJ58cZfqrnwKI4SKhKrbEfCAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-13T00:49:14.160613Z","bundle_sha256":"f4b8a418398586f9e762731c10b677b9f7572e52f8ece7c192101678578814ba"}}