{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:4NWX43BCWGIGT3U2XBK3TKPQOP","short_pith_number":"pith:4NWX43BC","canonical_record":{"source":{"id":"1107.2122","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-07-11T20:01:16Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"b943cd6881998f0f34b6327b509be9397b309dd56ad4498b872ad321f149b703","abstract_canon_sha256":"e43764b1e5fbf5e2c4a9d1d20028db518057c029f9930a75bf7ba289b04089f7"},"schema_version":"1.0"},"canonical_sha256":"e36d7e6c22b19069ee9ab855b9a9f073e610900ec57593f76ba6af0fddb58e84","source":{"kind":"arxiv","id":"1107.2122","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.2122","created_at":"2026-05-18T03:07:55Z"},{"alias_kind":"arxiv_version","alias_value":"1107.2122v1","created_at":"2026-05-18T03:07:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.2122","created_at":"2026-05-18T03:07:55Z"},{"alias_kind":"pith_short_12","alias_value":"4NWX43BCWGIG","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"4NWX43BCWGIGT3U2","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"4NWX43BC","created_at":"2026-05-18T12:26:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:4NWX43BCWGIGT3U2XBK3TKPQOP","target":"record","payload":{"canonical_record":{"source":{"id":"1107.2122","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-07-11T20:01:16Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"b943cd6881998f0f34b6327b509be9397b309dd56ad4498b872ad321f149b703","abstract_canon_sha256":"e43764b1e5fbf5e2c4a9d1d20028db518057c029f9930a75bf7ba289b04089f7"},"schema_version":"1.0"},"canonical_sha256":"e36d7e6c22b19069ee9ab855b9a9f073e610900ec57593f76ba6af0fddb58e84","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:07:55.105597Z","signature_b64":"a5eI5n8WSFZgwJYE9J3GdVWpyXhCcQO2d6faGU7Z7+bviVet6HSFdSOFsNo/9gHVT4zsTadUJUCJU2TS+PyUDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e36d7e6c22b19069ee9ab855b9a9f073e610900ec57593f76ba6af0fddb58e84","last_reissued_at":"2026-05-18T03:07:55.104838Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:07:55.104838Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1107.2122","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":"2026-05-18T03:07:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AdD56xpJjRD9NOKPMl4DxB60bZJ964Bc6zZgW77U8r/3e6Qh91BxY+5RXdrlG3zOfoCOdO6dbMleQ1+VMEzEAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T13:22:04.526945Z"},"content_sha256":"d749ba0aa81439411b2baa43937ca2299f5e29ca4ba7b3858000eb9bfbcc9782","schema_version":"1.0","event_id":"sha256:d749ba0aa81439411b2baa43937ca2299f5e29ca4ba7b3858000eb9bfbcc9782"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:4NWX43BCWGIGT3U2XBK3TKPQOP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Searching for Saturn's Dust Swarm: Limits on the size distribution of Irregular Satellites from km to micron sizes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.EP","authors_text":"Grant M. Kennedy, John A. Stansberry, Kate Y. L. Su, Mark C. Wyatt","submitted_at":"2011-07-11T20:01:16Z","abstract_excerpt":"We describe a search for dust created in collisions between the Saturnian irregular satellites using archival \\emph{Spitzer} MIPS observations. Although we detected a degree scale Saturn-centric excess that might be attributed to an irregular satellite dust cloud, we attribute it to the far-field wings of the PSF due to nearby Saturn. The Spitzer PSF is poorly characterised at such radial distances, and we expect PSF characterisation to be the main issue for future observations that aim to detect such dust. The observations place an upper limit on the level of dust in the outer reaches of the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.2122","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":"2026-05-18T03:07:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6UWkSqeldTFSZEOgaiSHYZjeH3ogTkVrxOoUNp/DPjuZ/2pMFqQCurpESLcfZYY/w2QSMD9TyhjBl0I8VYbiDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T13:22:04.527329Z"},"content_sha256":"68f6ef45cb2432a050dff2614316b35f2a7c5e274feb667dbf8d97d5e646efd2","schema_version":"1.0","event_id":"sha256:68f6ef45cb2432a050dff2614316b35f2a7c5e274feb667dbf8d97d5e646efd2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4NWX43BCWGIGT3U2XBK3TKPQOP/bundle.json","state_url":"https://pith.science/pith/4NWX43BCWGIGT3U2XBK3TKPQOP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4NWX43BCWGIGT3U2XBK3TKPQOP/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":"2026-05-30T13:22:04Z","links":{"resolver":"https://pith.science/pith/4NWX43BCWGIGT3U2XBK3TKPQOP","bundle":"https://pith.science/pith/4NWX43BCWGIGT3U2XBK3TKPQOP/bundle.json","state":"https://pith.science/pith/4NWX43BCWGIGT3U2XBK3TKPQOP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4NWX43BCWGIGT3U2XBK3TKPQOP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:4NWX43BCWGIGT3U2XBK3TKPQOP","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":"e43764b1e5fbf5e2c4a9d1d20028db518057c029f9930a75bf7ba289b04089f7","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-07-11T20:01:16Z","title_canon_sha256":"b943cd6881998f0f34b6327b509be9397b309dd56ad4498b872ad321f149b703"},"schema_version":"1.0","source":{"id":"1107.2122","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.2122","created_at":"2026-05-18T03:07:55Z"},{"alias_kind":"arxiv_version","alias_value":"1107.2122v1","created_at":"2026-05-18T03:07:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.2122","created_at":"2026-05-18T03:07:55Z"},{"alias_kind":"pith_short_12","alias_value":"4NWX43BCWGIG","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"4NWX43BCWGIGT3U2","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"4NWX43BC","created_at":"2026-05-18T12:26:20Z"}],"graph_snapshots":[{"event_id":"sha256:68f6ef45cb2432a050dff2614316b35f2a7c5e274feb667dbf8d97d5e646efd2","target":"graph","created_at":"2026-05-18T03:07:55Z","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 describe a search for dust created in collisions between the Saturnian irregular satellites using archival \\emph{Spitzer} MIPS observations. Although we detected a degree scale Saturn-centric excess that might be attributed to an irregular satellite dust cloud, we attribute it to the far-field wings of the PSF due to nearby Saturn. The Spitzer PSF is poorly characterised at such radial distances, and we expect PSF characterisation to be the main issue for future observations that aim to detect such dust. The observations place an upper limit on the level of dust in the outer reaches of the ","authors_text":"Grant M. Kennedy, John A. Stansberry, Kate Y. L. Su, Mark C. Wyatt","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-07-11T20:01:16Z","title":"Searching for Saturn's Dust Swarm: Limits on the size distribution of Irregular Satellites from km to micron sizes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.2122","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:d749ba0aa81439411b2baa43937ca2299f5e29ca4ba7b3858000eb9bfbcc9782","target":"record","created_at":"2026-05-18T03:07:55Z","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":"e43764b1e5fbf5e2c4a9d1d20028db518057c029f9930a75bf7ba289b04089f7","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-07-11T20:01:16Z","title_canon_sha256":"b943cd6881998f0f34b6327b509be9397b309dd56ad4498b872ad321f149b703"},"schema_version":"1.0","source":{"id":"1107.2122","kind":"arxiv","version":1}},"canonical_sha256":"e36d7e6c22b19069ee9ab855b9a9f073e610900ec57593f76ba6af0fddb58e84","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e36d7e6c22b19069ee9ab855b9a9f073e610900ec57593f76ba6af0fddb58e84","first_computed_at":"2026-05-18T03:07:55.104838Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:07:55.104838Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"a5eI5n8WSFZgwJYE9J3GdVWpyXhCcQO2d6faGU7Z7+bviVet6HSFdSOFsNo/9gHVT4zsTadUJUCJU2TS+PyUDw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:07:55.105597Z","signed_message":"canonical_sha256_bytes"},"source_id":"1107.2122","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d749ba0aa81439411b2baa43937ca2299f5e29ca4ba7b3858000eb9bfbcc9782","sha256:68f6ef45cb2432a050dff2614316b35f2a7c5e274feb667dbf8d97d5e646efd2"],"state_sha256":"b5a70f673382026d253820516c09c842637744ef0488eb26b5380c4c0d80276f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CQsYBrqbKRciFofbVj7fVbiERfzWViXkHCWHNBh7ryyirCbHAkuodRphS21tErZVIjGDIUTiReAY9+BfOTydDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T13:22:04.529415Z","bundle_sha256":"5459de886ee162f7b6ec04511987801f4c1187a668da5c438e8fa049528c9089"}}