{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1996:LLBMXKG2IVHA4ZIBXDBXCI6LL2","short_pith_number":"pith:LLBMXKG2","canonical_record":{"source":{"id":"astro-ph/9601164","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1996-01-29T20:21:00Z","cross_cats_sorted":[],"title_canon_sha256":"b148f939fe2572c7f0c1355da00bf7f0f50560d0155ccf0a73491e21a0a6a061","abstract_canon_sha256":"3e5002f09b41aa6437fc96b4cddadbe2eee2e7a5f7ed8aaae65268e0a8a3ebb9"},"schema_version":"1.0"},"canonical_sha256":"5ac2cba8da454e0e6501b8c37123cb5e9325841b589165938a0aef41566328d9","source":{"kind":"arxiv","id":"astro-ph/9601164","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9601164","created_at":"2026-05-18T01:40:21Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9601164v1","created_at":"2026-05-18T01:40:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9601164","created_at":"2026-05-18T01:40:21Z"},{"alias_kind":"pith_short_12","alias_value":"LLBMXKG2IVHA","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"LLBMXKG2IVHA4ZIB","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"LLBMXKG2","created_at":"2026-05-18T12:25:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1996:LLBMXKG2IVHA4ZIBXDBXCI6LL2","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9601164","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1996-01-29T20:21:00Z","cross_cats_sorted":[],"title_canon_sha256":"b148f939fe2572c7f0c1355da00bf7f0f50560d0155ccf0a73491e21a0a6a061","abstract_canon_sha256":"3e5002f09b41aa6437fc96b4cddadbe2eee2e7a5f7ed8aaae65268e0a8a3ebb9"},"schema_version":"1.0"},"canonical_sha256":"5ac2cba8da454e0e6501b8c37123cb5e9325841b589165938a0aef41566328d9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:21.893046Z","signature_b64":"acSZWsoO5z4OnSLuuPkMD4R0Skbiaqox4ENeExmauNyqi1PQX1ZVcIvl/bR3XHpsYW04vK+Jpa/Hvp7EGtmdAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5ac2cba8da454e0e6501b8c37123cb5e9325841b589165938a0aef41566328d9","last_reissued_at":"2026-05-18T01:40:21.892529Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:21.892529Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9601164","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":"2026-05-18T01:40:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8O4UwFKEFIJWj6Vs/42oe8dE/AB5DCTXgMAZRa5Ht5QpMp1+8wfw/S7tI3au4y4ygCWyfFe2rra4QKgcCZUZCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T22:44:10.363929Z"},"content_sha256":"2b34daba530a5fc28ff75e5f87287a9cb433ed2e260ac8fd9844376a3471565f","schema_version":"1.0","event_id":"sha256:2b34daba530a5fc28ff75e5f87287a9cb433ed2e260ac8fd9844376a3471565f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1996:LLBMXKG2IVHA4ZIBXDBXCI6LL2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The lightcurve reconstruction method for measuring the time delay of gravitational lens systems","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Bernhard Geiger, Peter Schneider (Max-Planck-Institut fuer Astrophysik)","submitted_at":"1996-01-29T20:21:00Z","abstract_excerpt":"We propose a new technique to measure the time delay of radio-loud gravitational lens systems, which does not rely on the excessive use of interferometric observations. Instead, the method is based on single-dish flux density monitoring of the (unresolved) lens system's total lightcurve, combined with additional interferometric measurements of the flux density ratio at a few epochs during that monitoring period. The basic idea of the method is to reconstruct the individual image lightcurves from the observed total lightcurve by assuming a range of potential values for the time delay and the ma"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9601164","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":"2026-05-18T01:40:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q1P3uMdJhKxi7K46op4RJ56syvC6QuClSb1VF70EvR8Rd/GdW+qggYgD1GHPosF5KQMFgu/JMtGSW+6e1HUyAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T22:44:10.364330Z"},"content_sha256":"c6fcbeab0a25151d92c3a89b32559cae3e5257cb9b61c3778346872cd91bd5e3","schema_version":"1.0","event_id":"sha256:c6fcbeab0a25151d92c3a89b32559cae3e5257cb9b61c3778346872cd91bd5e3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LLBMXKG2IVHA4ZIBXDBXCI6LL2/bundle.json","state_url":"https://pith.science/pith/LLBMXKG2IVHA4ZIBXDBXCI6LL2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LLBMXKG2IVHA4ZIBXDBXCI6LL2/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":"2026-06-29T22:44:10Z","links":{"resolver":"https://pith.science/pith/LLBMXKG2IVHA4ZIBXDBXCI6LL2","bundle":"https://pith.science/pith/LLBMXKG2IVHA4ZIBXDBXCI6LL2/bundle.json","state":"https://pith.science/pith/LLBMXKG2IVHA4ZIBXDBXCI6LL2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LLBMXKG2IVHA4ZIBXDBXCI6LL2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1996:LLBMXKG2IVHA4ZIBXDBXCI6LL2","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":"3e5002f09b41aa6437fc96b4cddadbe2eee2e7a5f7ed8aaae65268e0a8a3ebb9","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1996-01-29T20:21:00Z","title_canon_sha256":"b148f939fe2572c7f0c1355da00bf7f0f50560d0155ccf0a73491e21a0a6a061"},"schema_version":"1.0","source":{"id":"astro-ph/9601164","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9601164","created_at":"2026-05-18T01:40:21Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9601164v1","created_at":"2026-05-18T01:40:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9601164","created_at":"2026-05-18T01:40:21Z"},{"alias_kind":"pith_short_12","alias_value":"LLBMXKG2IVHA","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"LLBMXKG2IVHA4ZIB","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"LLBMXKG2","created_at":"2026-05-18T12:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:c6fcbeab0a25151d92c3a89b32559cae3e5257cb9b61c3778346872cd91bd5e3","target":"graph","created_at":"2026-05-18T01:40:21Z","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 propose a new technique to measure the time delay of radio-loud gravitational lens systems, which does not rely on the excessive use of interferometric observations. Instead, the method is based on single-dish flux density monitoring of the (unresolved) lens system's total lightcurve, combined with additional interferometric measurements of the flux density ratio at a few epochs during that monitoring period. The basic idea of the method is to reconstruct the individual image lightcurves from the observed total lightcurve by assuming a range of potential values for the time delay and the ma","authors_text":"Bernhard Geiger, Peter Schneider (Max-Planck-Institut fuer Astrophysik)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1996-01-29T20:21:00Z","title":"The lightcurve reconstruction method for measuring the time delay of gravitational lens systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9601164","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":"sha256:2b34daba530a5fc28ff75e5f87287a9cb433ed2e260ac8fd9844376a3471565f","target":"record","created_at":"2026-05-18T01:40:21Z","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":"3e5002f09b41aa6437fc96b4cddadbe2eee2e7a5f7ed8aaae65268e0a8a3ebb9","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1996-01-29T20:21:00Z","title_canon_sha256":"b148f939fe2572c7f0c1355da00bf7f0f50560d0155ccf0a73491e21a0a6a061"},"schema_version":"1.0","source":{"id":"astro-ph/9601164","kind":"arxiv","version":1}},"canonical_sha256":"5ac2cba8da454e0e6501b8c37123cb5e9325841b589165938a0aef41566328d9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5ac2cba8da454e0e6501b8c37123cb5e9325841b589165938a0aef41566328d9","first_computed_at":"2026-05-18T01:40:21.892529Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:21.892529Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"acSZWsoO5z4OnSLuuPkMD4R0Skbiaqox4ENeExmauNyqi1PQX1ZVcIvl/bR3XHpsYW04vK+Jpa/Hvp7EGtmdAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:21.893046Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9601164","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2b34daba530a5fc28ff75e5f87287a9cb433ed2e260ac8fd9844376a3471565f","sha256:c6fcbeab0a25151d92c3a89b32559cae3e5257cb9b61c3778346872cd91bd5e3"],"state_sha256":"c9900895f252039fa0f240a868d30799d8c21a28a9293b7099d7a360cac12786"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"t5VmqaPQse/7MixgBTMVWQCCsoLrtWlmo38cQNMZKrJLXqoOTirI7g1CFGvW0Rp1504csr4ah0Neal681OAuAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-29T22:44:10.366417Z","bundle_sha256":"e633f7bcc46bf616781c21826812cdbc4b353465f241d1463f5a918f4908d26a"}}