{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:7ZANIZT7ASCHXVKJPPWJQKJGH3","short_pith_number":"pith:7ZANIZT7","canonical_record":{"source":{"id":"0810.1092","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-07T03:20:45Z","cross_cats_sorted":[],"title_canon_sha256":"778c996f6a3d14986f59ccf9f3f00038e852a07f86e949269b2ed1a64a23e12d","abstract_canon_sha256":"38dc01ef0e557c877013d398b1b2bf0df4e1a3f3ee68cfe52cb2ab268c56d0c3"},"schema_version":"1.0"},"canonical_sha256":"fe40d4667f04847bd5497bec9829263efe3898bb067d4122f140ed9d0526b6ba","source":{"kind":"arxiv","id":"0810.1092","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0810.1092","created_at":"2026-07-04T17:13:06Z"},{"alias_kind":"arxiv_version","alias_value":"0810.1092v1","created_at":"2026-07-04T17:13:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.1092","created_at":"2026-07-04T17:13:06Z"},{"alias_kind":"pith_short_12","alias_value":"7ZANIZT7ASCH","created_at":"2026-07-04T17:13:06Z"},{"alias_kind":"pith_short_16","alias_value":"7ZANIZT7ASCHXVKJ","created_at":"2026-07-04T17:13:06Z"},{"alias_kind":"pith_short_8","alias_value":"7ZANIZT7","created_at":"2026-07-04T17:13:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:7ZANIZT7ASCHXVKJPPWJQKJGH3","target":"record","payload":{"canonical_record":{"source":{"id":"0810.1092","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-07T03:20:45Z","cross_cats_sorted":[],"title_canon_sha256":"778c996f6a3d14986f59ccf9f3f00038e852a07f86e949269b2ed1a64a23e12d","abstract_canon_sha256":"38dc01ef0e557c877013d398b1b2bf0df4e1a3f3ee68cfe52cb2ab268c56d0c3"},"schema_version":"1.0"},"canonical_sha256":"fe40d4667f04847bd5497bec9829263efe3898bb067d4122f140ed9d0526b6ba","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:13:06.030723Z","signature_b64":"ox3wfuooMQHYlHg23yjZvMrQnsknz5OQHOftHTlCHJ77dC+l/QkoVTAkzMUQwQZu1m5Uxf0UWijBs95h4wyBCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fe40d4667f04847bd5497bec9829263efe3898bb067d4122f140ed9d0526b6ba","last_reissued_at":"2026-07-04T17:13:06.030307Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:13:06.030307Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0810.1092","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":"2026-07-04T17:13:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WhFMk4VB85k2rXnM4Ruy04KrfOqjBN1XagBqUCHzescvkmzH3CXs8/0kRvxquIGHYH4LNrRVZpBHfpO73sBHAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T11:49:32.944703Z"},"content_sha256":"f51ad858b48e9e640e5562d2a391e75999a20fb16732ede63eb828d61c56758e","schema_version":"1.0","event_id":"sha256:f51ad858b48e9e640e5562d2a391e75999a20fb16732ede63eb828d61c56758e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:7ZANIZT7ASCHXVKJPPWJQKJGH3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A microlensing study of the accretion disc in the quasar MG 0414+0534","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"D. J. E. Floyd, J. S. B. Wyithe, N. F. Bate, R. L. Webster","submitted_at":"2008-10-07T03:20:45Z","abstract_excerpt":"Observations of gravitational microlensing in multiply imaged quasars currently provide the only direct probe of quasar emission region structure on sub-microarcsecond scales. Analyses of microlensing variability are observationally expensive, requiring long-term monitoring of lensed systems. Here we demonstrate a technique for constraining the size of the quasar continuum emission region as a function of wavelength using single-epoch multi-band imaging. We have obtained images of the lensed quasar MG 0414+0534 in five wavelength bands using the Magellan 6.5-metre Baade telescope at Las Campan"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.1092","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/0810.1092/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":"2026-07-04T17:13:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nU+/vAdOd41d2fB5sIVF60H1K10W5vFZPTWdIWhC+Isp/j1vgy6OfOzA/kWLrChp9xYsBVaW43AkBXH6MmGgBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T11:49:32.945630Z"},"content_sha256":"cd6de204d75ca6b1931cd992ba3c87cba96bb7b8c93774b901374a5652f57d4c","schema_version":"1.0","event_id":"sha256:cd6de204d75ca6b1931cd992ba3c87cba96bb7b8c93774b901374a5652f57d4c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7ZANIZT7ASCHXVKJPPWJQKJGH3/bundle.json","state_url":"https://pith.science/pith/7ZANIZT7ASCHXVKJPPWJQKJGH3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7ZANIZT7ASCHXVKJPPWJQKJGH3/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":"2026-08-20T11:49:32Z","links":{"resolver":"https://pith.science/pith/7ZANIZT7ASCHXVKJPPWJQKJGH3","bundle":"https://pith.science/pith/7ZANIZT7ASCHXVKJPPWJQKJGH3/bundle.json","state":"https://pith.science/pith/7ZANIZT7ASCHXVKJPPWJQKJGH3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7ZANIZT7ASCHXVKJPPWJQKJGH3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:7ZANIZT7ASCHXVKJPPWJQKJGH3","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":"38dc01ef0e557c877013d398b1b2bf0df4e1a3f3ee68cfe52cb2ab268c56d0c3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-07T03:20:45Z","title_canon_sha256":"778c996f6a3d14986f59ccf9f3f00038e852a07f86e949269b2ed1a64a23e12d"},"schema_version":"1.0","source":{"id":"0810.1092","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0810.1092","created_at":"2026-07-04T17:13:06Z"},{"alias_kind":"arxiv_version","alias_value":"0810.1092v1","created_at":"2026-07-04T17:13:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.1092","created_at":"2026-07-04T17:13:06Z"},{"alias_kind":"pith_short_12","alias_value":"7ZANIZT7ASCH","created_at":"2026-07-04T17:13:06Z"},{"alias_kind":"pith_short_16","alias_value":"7ZANIZT7ASCHXVKJ","created_at":"2026-07-04T17:13:06Z"},{"alias_kind":"pith_short_8","alias_value":"7ZANIZT7","created_at":"2026-07-04T17:13:06Z"}],"graph_snapshots":[{"event_id":"sha256:cd6de204d75ca6b1931cd992ba3c87cba96bb7b8c93774b901374a5652f57d4c","target":"graph","created_at":"2026-07-04T17:13:06Z","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/0810.1092/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Observations of gravitational microlensing in multiply imaged quasars currently provide the only direct probe of quasar emission region structure on sub-microarcsecond scales. Analyses of microlensing variability are observationally expensive, requiring long-term monitoring of lensed systems. Here we demonstrate a technique for constraining the size of the quasar continuum emission region as a function of wavelength using single-epoch multi-band imaging. We have obtained images of the lensed quasar MG 0414+0534 in five wavelength bands using the Magellan 6.5-metre Baade telescope at Las Campan","authors_text":"D. J. E. Floyd, J. S. B. Wyithe, N. F. Bate, R. L. Webster","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-07T03:20:45Z","title":"A microlensing study of the accretion disc in the quasar MG 0414+0534"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.1092","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:f51ad858b48e9e640e5562d2a391e75999a20fb16732ede63eb828d61c56758e","target":"record","created_at":"2026-07-04T17:13:06Z","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":"38dc01ef0e557c877013d398b1b2bf0df4e1a3f3ee68cfe52cb2ab268c56d0c3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-07T03:20:45Z","title_canon_sha256":"778c996f6a3d14986f59ccf9f3f00038e852a07f86e949269b2ed1a64a23e12d"},"schema_version":"1.0","source":{"id":"0810.1092","kind":"arxiv","version":1}},"canonical_sha256":"fe40d4667f04847bd5497bec9829263efe3898bb067d4122f140ed9d0526b6ba","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fe40d4667f04847bd5497bec9829263efe3898bb067d4122f140ed9d0526b6ba","first_computed_at":"2026-07-04T17:13:06.030307Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:13:06.030307Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ox3wfuooMQHYlHg23yjZvMrQnsknz5OQHOftHTlCHJ77dC+l/QkoVTAkzMUQwQZu1m5Uxf0UWijBs95h4wyBCg==","signature_status":"signed_v1","signed_at":"2026-07-04T17:13:06.030723Z","signed_message":"canonical_sha256_bytes"},"source_id":"0810.1092","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f51ad858b48e9e640e5562d2a391e75999a20fb16732ede63eb828d61c56758e","sha256:cd6de204d75ca6b1931cd992ba3c87cba96bb7b8c93774b901374a5652f57d4c"],"state_sha256":"af79543c33606efaf57f5cf6baa886a840761f995e6a2cc985537329329af04a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xjrMUkEY6IYygG0O/gBsLdj7QuQnojugIWaBzyn+m+M9XFVWsAKPrK5iXunz5iRz0Pv9dDSQCVYVCrI2zmtdCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-20T11:49:32.954898Z","bundle_sha256":"d7f84f5279e1c91cb0c798760f54ee2be8b565f2a5d5ab15cd96a5e538961d89"}}