{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:5GUJNQ6MW4COYHCTP2AJEHWU63","short_pith_number":"pith:5GUJNQ6M","canonical_record":{"source":{"id":"0911.5522","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2009-11-29T22:26:43Z","cross_cats_sorted":[],"title_canon_sha256":"ae70ae0ba1e0685f90f208a79c61fa9631ddcc91b7f4470a2855ec955418db08","abstract_canon_sha256":"a8139275f6f767cda89d1b74e21de9e0ddd545b6dbd1670801b0dee8ee928fc3"},"schema_version":"1.0"},"canonical_sha256":"e9a896c3ccb704ec1c537e80921ed4f6edd8db159fe0486667e2a4fc7f2faf72","source":{"kind":"arxiv","id":"0911.5522","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.5522","created_at":"2026-05-18T02:10:35Z"},{"alias_kind":"arxiv_version","alias_value":"0911.5522v1","created_at":"2026-05-18T02:10:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.5522","created_at":"2026-05-18T02:10:35Z"},{"alias_kind":"pith_short_12","alias_value":"5GUJNQ6MW4CO","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"5GUJNQ6MW4COYHCT","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"5GUJNQ6M","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:5GUJNQ6MW4COYHCTP2AJEHWU63","target":"record","payload":{"canonical_record":{"source":{"id":"0911.5522","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2009-11-29T22:26:43Z","cross_cats_sorted":[],"title_canon_sha256":"ae70ae0ba1e0685f90f208a79c61fa9631ddcc91b7f4470a2855ec955418db08","abstract_canon_sha256":"a8139275f6f767cda89d1b74e21de9e0ddd545b6dbd1670801b0dee8ee928fc3"},"schema_version":"1.0"},"canonical_sha256":"e9a896c3ccb704ec1c537e80921ed4f6edd8db159fe0486667e2a4fc7f2faf72","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:10:35.836674Z","signature_b64":"On1QHkA5584O7zpz4L6VbLEKd7pa0nU4RxeRHeHAbVNdOI+zJ9YzPdTxEjJabGL3YowoH0j70ARxnOSC6A7NAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e9a896c3ccb704ec1c537e80921ed4f6edd8db159fe0486667e2a4fc7f2faf72","last_reissued_at":"2026-05-18T02:10:35.835932Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:10:35.835932Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0911.5522","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":"2026-05-18T02:10:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"76NVpJ6zt+l50HnEyjUr6SyrPoEYpb5bjmO8DAJiOe8IiDIxi1VsAdO5EhXqSJut7c+V6AyC4OU3jclr7fRuBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T14:02:15.167998Z"},"content_sha256":"398d80f5091a5f618b353ef2e92ba87b8b48a383788cb36a15d2ed6919072305","schema_version":"1.0","event_id":"sha256:398d80f5091a5f618b353ef2e92ba87b8b48a383788cb36a15d2ed6919072305"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:5GUJNQ6MW4COYHCTP2AJEHWU63","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Return of Activity in Main-Belt Comet 133P/Elst-Pizarro","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"(2) UCLA, (3) University of Kent, (4) Max Planck Inst. for Solar System Research), Colin Snodgrass (4) ((1) Queen's University Belfast, David Jewitt (2), Henry H. Hsieh (1), Pedro Lacerda (1), Stephen C. Lowry (3)","submitted_at":"2009-11-29T22:26:43Z","abstract_excerpt":"Comet 133P/Elst-Pizarro is the first-known and currently best-characterised member of the main-belt comets, a recently-identified class of objects that exhibit cometary activity but which are dynamically indistinguishable from main-belt asteroids. We report here on the results of a multi-year monitoring campaign from 2003 to 2008, and present observations of the return of activity in 2007. We find a pattern of activity consistent with the seasonal activity modulation hypothesis proposed by Hsieh et al. (2004, AJ, 127, 2997). Additionally, recomputation of phase function parameters using data i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.5522","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":"2026-05-18T02:10:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wvX6zZz+lz0uWzZL3/YfEZYlxrRdBDOWOcUbqzKBYwqB7Sb3qO/2vy1ttG3ghqF5IYxXqtlocQc+3o5NfKApAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T14:02:15.168674Z"},"content_sha256":"d884efd45b29eff2224b7f26e1cae90d1c9812fccc06aed7f1a09ebf7cfcdae9","schema_version":"1.0","event_id":"sha256:d884efd45b29eff2224b7f26e1cae90d1c9812fccc06aed7f1a09ebf7cfcdae9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5GUJNQ6MW4COYHCTP2AJEHWU63/bundle.json","state_url":"https://pith.science/pith/5GUJNQ6MW4COYHCTP2AJEHWU63/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5GUJNQ6MW4COYHCTP2AJEHWU63/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":"2026-06-08T14:02:15Z","links":{"resolver":"https://pith.science/pith/5GUJNQ6MW4COYHCTP2AJEHWU63","bundle":"https://pith.science/pith/5GUJNQ6MW4COYHCTP2AJEHWU63/bundle.json","state":"https://pith.science/pith/5GUJNQ6MW4COYHCTP2AJEHWU63/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5GUJNQ6MW4COYHCTP2AJEHWU63/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:5GUJNQ6MW4COYHCTP2AJEHWU63","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":"a8139275f6f767cda89d1b74e21de9e0ddd545b6dbd1670801b0dee8ee928fc3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2009-11-29T22:26:43Z","title_canon_sha256":"ae70ae0ba1e0685f90f208a79c61fa9631ddcc91b7f4470a2855ec955418db08"},"schema_version":"1.0","source":{"id":"0911.5522","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.5522","created_at":"2026-05-18T02:10:35Z"},{"alias_kind":"arxiv_version","alias_value":"0911.5522v1","created_at":"2026-05-18T02:10:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.5522","created_at":"2026-05-18T02:10:35Z"},{"alias_kind":"pith_short_12","alias_value":"5GUJNQ6MW4CO","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"5GUJNQ6MW4COYHCT","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"5GUJNQ6M","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:d884efd45b29eff2224b7f26e1cae90d1c9812fccc06aed7f1a09ebf7cfcdae9","target":"graph","created_at":"2026-05-18T02:10:35Z","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":"Comet 133P/Elst-Pizarro is the first-known and currently best-characterised member of the main-belt comets, a recently-identified class of objects that exhibit cometary activity but which are dynamically indistinguishable from main-belt asteroids. We report here on the results of a multi-year monitoring campaign from 2003 to 2008, and present observations of the return of activity in 2007. We find a pattern of activity consistent with the seasonal activity modulation hypothesis proposed by Hsieh et al. (2004, AJ, 127, 2997). Additionally, recomputation of phase function parameters using data i","authors_text":"(2) UCLA, (3) University of Kent, (4) Max Planck Inst. for Solar System Research), Colin Snodgrass (4) ((1) Queen's University Belfast, David Jewitt (2), Henry H. Hsieh (1), Pedro Lacerda (1), Stephen C. Lowry (3)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2009-11-29T22:26:43Z","title":"The Return of Activity in Main-Belt Comet 133P/Elst-Pizarro"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.5522","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":"sha256:398d80f5091a5f618b353ef2e92ba87b8b48a383788cb36a15d2ed6919072305","target":"record","created_at":"2026-05-18T02:10:35Z","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":"a8139275f6f767cda89d1b74e21de9e0ddd545b6dbd1670801b0dee8ee928fc3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2009-11-29T22:26:43Z","title_canon_sha256":"ae70ae0ba1e0685f90f208a79c61fa9631ddcc91b7f4470a2855ec955418db08"},"schema_version":"1.0","source":{"id":"0911.5522","kind":"arxiv","version":1}},"canonical_sha256":"e9a896c3ccb704ec1c537e80921ed4f6edd8db159fe0486667e2a4fc7f2faf72","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e9a896c3ccb704ec1c537e80921ed4f6edd8db159fe0486667e2a4fc7f2faf72","first_computed_at":"2026-05-18T02:10:35.835932Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:10:35.835932Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"On1QHkA5584O7zpz4L6VbLEKd7pa0nU4RxeRHeHAbVNdOI+zJ9YzPdTxEjJabGL3YowoH0j70ARxnOSC6A7NAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:10:35.836674Z","signed_message":"canonical_sha256_bytes"},"source_id":"0911.5522","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:398d80f5091a5f618b353ef2e92ba87b8b48a383788cb36a15d2ed6919072305","sha256:d884efd45b29eff2224b7f26e1cae90d1c9812fccc06aed7f1a09ebf7cfcdae9"],"state_sha256":"eb9c86d2b6ee64686dad37b4e5b619422dd165f9a18ecfcb046e635972a6b922"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IjHbp0EnEXJg8H54uxRY4GIqKhk0zt1pyI1aazfvEs6AOcXyk+17HcFR9R00hdIjMpIqSM4UJ7mVwF0OTUQxAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T14:02:15.172080Z","bundle_sha256":"82693a2729cbead2f37b68125ae3603e76d0de793f3c9faa50f31d3d80ecc0e7"}}