{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:DIBWO3FIUGEPCTUHX4XJ6VMMLH","short_pith_number":"pith:DIBWO3FI","canonical_record":{"source":{"id":"1106.0003","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-05-31T20:00:03Z","cross_cats_sorted":[],"title_canon_sha256":"a7ae64823f7801928c9ac6fbd08fc0f46b990e47213c1070f94866ac609ec292","abstract_canon_sha256":"577d3591743e1b173380adf086abe90ed1ac8697ed8ed08dd0d574f060d49c50"},"schema_version":"1.0"},"canonical_sha256":"1a03676ca8a188f14e87bf2e9f558c59e91f16b2bdd5c325a9f5cd55566d2f03","source":{"kind":"arxiv","id":"1106.0003","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.0003","created_at":"2026-05-18T02:01:45Z"},{"alias_kind":"arxiv_version","alias_value":"1106.0003v1","created_at":"2026-05-18T02:01:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.0003","created_at":"2026-05-18T02:01:45Z"},{"alias_kind":"pith_short_12","alias_value":"DIBWO3FIUGEP","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_16","alias_value":"DIBWO3FIUGEPCTUH","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_8","alias_value":"DIBWO3FI","created_at":"2026-05-18T12:26:26Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:DIBWO3FIUGEPCTUHX4XJ6VMMLH","target":"record","payload":{"canonical_record":{"source":{"id":"1106.0003","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-05-31T20:00:03Z","cross_cats_sorted":[],"title_canon_sha256":"a7ae64823f7801928c9ac6fbd08fc0f46b990e47213c1070f94866ac609ec292","abstract_canon_sha256":"577d3591743e1b173380adf086abe90ed1ac8697ed8ed08dd0d574f060d49c50"},"schema_version":"1.0"},"canonical_sha256":"1a03676ca8a188f14e87bf2e9f558c59e91f16b2bdd5c325a9f5cd55566d2f03","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:01:45.234849Z","signature_b64":"eG3J5LQqcd48aKULrDXLE+ZVV2wQCDqhRP/mp8aFn+0Aui2bq4CJhapjbLo7f4nCOoS4voanj6dW4olOeej0Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1a03676ca8a188f14e87bf2e9f558c59e91f16b2bdd5c325a9f5cd55566d2f03","last_reissued_at":"2026-05-18T02:01:45.233909Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:01:45.233909Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1106.0003","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":"2026-05-18T02:01:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S/MPt66qSU+96jjFUmDwaJjgz1RQ0N4tcLDWK24z5ELrN7KA+S8wG8jobLjZGpmX4v0C6Rn7BHMAWQIdiz+MDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T08:52:41.758136Z"},"content_sha256":"9a30a51f4bfa1fa369e763cf9e9f83c713ea998011c461dcf48ddaa2aefae18f","schema_version":"1.0","event_id":"sha256:9a30a51f4bfa1fa369e763cf9e9f83c713ea998011c461dcf48ddaa2aefae18f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:DIBWO3FIUGEPCTUHX4XJ6VMMLH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"DASCH on KU Cyg: a ~5 year dust accretion event in ~1900","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Edward Los, Jonathan Grindlay, Mathieu Servillat, Sumin Tang","submitted_at":"2011-05-31T20:00:03Z","abstract_excerpt":"KU Cyg is an eclipsing binary consisting of a F-type star accreting through a large accretion disk from a K5III red giant. Here we present the discovery of a 5-yr dip around 1900 found from its 100 yr DASCH (Digital Access to a Sky Century at Harvard) light curve. It showed a ~0.5 mag slow fading from 1899 to 1903, and brightened back around 1904 on a relatively shorter timescale. The light curve shape of the 1899-1904 fading-brightening event differs from the dust production and dispersion process observed in R Coronae Borealis (RCB) stars, which usually has a faster fading and slower recover"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.0003","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":"2026-05-18T02:01:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Vgh7pzP/nE/eRIYzCZ4M8qaLHnE0I8RBokpU2dcygzsyFR5+kVVnoc1hvIhxLxkPbTSwaQaMW36mKjx4UfT8DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T08:52:41.758863Z"},"content_sha256":"1683b5f133597e4f464fed9476ba183d1e988073555a946d927ac5c8574f5161","schema_version":"1.0","event_id":"sha256:1683b5f133597e4f464fed9476ba183d1e988073555a946d927ac5c8574f5161"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DIBWO3FIUGEPCTUHX4XJ6VMMLH/bundle.json","state_url":"https://pith.science/pith/DIBWO3FIUGEPCTUHX4XJ6VMMLH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DIBWO3FIUGEPCTUHX4XJ6VMMLH/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":"2026-05-25T08:52:41Z","links":{"resolver":"https://pith.science/pith/DIBWO3FIUGEPCTUHX4XJ6VMMLH","bundle":"https://pith.science/pith/DIBWO3FIUGEPCTUHX4XJ6VMMLH/bundle.json","state":"https://pith.science/pith/DIBWO3FIUGEPCTUHX4XJ6VMMLH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DIBWO3FIUGEPCTUHX4XJ6VMMLH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:DIBWO3FIUGEPCTUHX4XJ6VMMLH","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":"577d3591743e1b173380adf086abe90ed1ac8697ed8ed08dd0d574f060d49c50","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-05-31T20:00:03Z","title_canon_sha256":"a7ae64823f7801928c9ac6fbd08fc0f46b990e47213c1070f94866ac609ec292"},"schema_version":"1.0","source":{"id":"1106.0003","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.0003","created_at":"2026-05-18T02:01:45Z"},{"alias_kind":"arxiv_version","alias_value":"1106.0003v1","created_at":"2026-05-18T02:01:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.0003","created_at":"2026-05-18T02:01:45Z"},{"alias_kind":"pith_short_12","alias_value":"DIBWO3FIUGEP","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_16","alias_value":"DIBWO3FIUGEPCTUH","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_8","alias_value":"DIBWO3FI","created_at":"2026-05-18T12:26:26Z"}],"graph_snapshots":[{"event_id":"sha256:1683b5f133597e4f464fed9476ba183d1e988073555a946d927ac5c8574f5161","target":"graph","created_at":"2026-05-18T02:01:45Z","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":"KU Cyg is an eclipsing binary consisting of a F-type star accreting through a large accretion disk from a K5III red giant. Here we present the discovery of a 5-yr dip around 1900 found from its 100 yr DASCH (Digital Access to a Sky Century at Harvard) light curve. It showed a ~0.5 mag slow fading from 1899 to 1903, and brightened back around 1904 on a relatively shorter timescale. The light curve shape of the 1899-1904 fading-brightening event differs from the dust production and dispersion process observed in R Coronae Borealis (RCB) stars, which usually has a faster fading and slower recover","authors_text":"Edward Los, Jonathan Grindlay, Mathieu Servillat, Sumin Tang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-05-31T20:00:03Z","title":"DASCH on KU Cyg: a ~5 year dust accretion event in ~1900"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.0003","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":"sha256:9a30a51f4bfa1fa369e763cf9e9f83c713ea998011c461dcf48ddaa2aefae18f","target":"record","created_at":"2026-05-18T02:01:45Z","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":"577d3591743e1b173380adf086abe90ed1ac8697ed8ed08dd0d574f060d49c50","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-05-31T20:00:03Z","title_canon_sha256":"a7ae64823f7801928c9ac6fbd08fc0f46b990e47213c1070f94866ac609ec292"},"schema_version":"1.0","source":{"id":"1106.0003","kind":"arxiv","version":1}},"canonical_sha256":"1a03676ca8a188f14e87bf2e9f558c59e91f16b2bdd5c325a9f5cd55566d2f03","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1a03676ca8a188f14e87bf2e9f558c59e91f16b2bdd5c325a9f5cd55566d2f03","first_computed_at":"2026-05-18T02:01:45.233909Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:01:45.233909Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eG3J5LQqcd48aKULrDXLE+ZVV2wQCDqhRP/mp8aFn+0Aui2bq4CJhapjbLo7f4nCOoS4voanj6dW4olOeej0Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:01:45.234849Z","signed_message":"canonical_sha256_bytes"},"source_id":"1106.0003","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9a30a51f4bfa1fa369e763cf9e9f83c713ea998011c461dcf48ddaa2aefae18f","sha256:1683b5f133597e4f464fed9476ba183d1e988073555a946d927ac5c8574f5161"],"state_sha256":"c6e018485e97ddd1e08918a5f3f85d0319047008db3bb0a82af3be83d5def12f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7rmvDMW63uGYjNqJK/e2vw538OAqu4VoJ63u9xnLRNXOnTmuDYrRp6y0w5hiXpsg6WHm1ihDy5T8Iql0LzemCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T08:52:41.762593Z","bundle_sha256":"de578cdc57df2d21e267b29357a30ccef0b59ae8c67074f6f54143761d1b46e6"}}