{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:QTGF6EAUOMDOYZP2FWZ7KRSM5O","short_pith_number":"pith:QTGF6EAU","canonical_record":{"source":{"id":"1905.12566","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-05-29T16:17:10Z","cross_cats_sorted":[],"title_canon_sha256":"989f5e22348917a1006cc1177fae236af6ad701f33e9e00e2c9331851a7c5642","abstract_canon_sha256":"7a56467ffad17457a10a668603899ac763459b3baf7a27acb7a614078e7deb44"},"schema_version":"1.0"},"canonical_sha256":"84cc5f10147306ec65fa2db3f5464cebb71cf2242a7cfa92121b0797c2417f6b","source":{"kind":"arxiv","id":"1905.12566","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.12566","created_at":"2026-05-17T23:40:31Z"},{"alias_kind":"arxiv_version","alias_value":"1905.12566v1","created_at":"2026-05-17T23:40:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.12566","created_at":"2026-05-17T23:40:31Z"},{"alias_kind":"pith_short_12","alias_value":"QTGF6EAUOMDO","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"QTGF6EAUOMDOYZP2","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"QTGF6EAU","created_at":"2026-05-18T12:33:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:QTGF6EAUOMDOYZP2FWZ7KRSM5O","target":"record","payload":{"canonical_record":{"source":{"id":"1905.12566","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-05-29T16:17:10Z","cross_cats_sorted":[],"title_canon_sha256":"989f5e22348917a1006cc1177fae236af6ad701f33e9e00e2c9331851a7c5642","abstract_canon_sha256":"7a56467ffad17457a10a668603899ac763459b3baf7a27acb7a614078e7deb44"},"schema_version":"1.0"},"canonical_sha256":"84cc5f10147306ec65fa2db3f5464cebb71cf2242a7cfa92121b0797c2417f6b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:40:31.684074Z","signature_b64":"dUN/N74RuwdIlGBIykr9CEWp3PYEAQxtwaJQzfFWXrzFO95OQYCmC5Fc9zonTAvvew90MiFMrZbdjP8FIQtkCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"84cc5f10147306ec65fa2db3f5464cebb71cf2242a7cfa92121b0797c2417f6b","last_reissued_at":"2026-05-17T23:40:31.683640Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:40:31.683640Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1905.12566","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":"2026-05-17T23:40:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"H2jktSp4jDDOFwtfPQuQ5gaHGAIZIuJCmygiT5/KLO52u7d3IloZLRZ5zX5EQwf7AYgy4c0vdht3vbffSqFJAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T23:12:24.681439Z"},"content_sha256":"c6d551d80c737010fda91461f52f9df7b624638414cafc1beb51fd3a44bb8894","schema_version":"1.0","event_id":"sha256:c6d551d80c737010fda91461f52f9df7b624638414cafc1beb51fd3a44bb8894"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:QTGF6EAUOMDOYZP2FWZ7KRSM5O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Thermal Emission from the Uranian Ring System","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Edward M. Molter, Imke de Pater, Leigh N. Fletcher, Michael T. Roman","submitted_at":"2019-05-29T16:17:10Z","abstract_excerpt":"The narrow main rings of Uranus are composed of almost exclusively centimeter- to meter-sized particles, with a very small or nonexistent dust component; however, the filling factor, composition, thickness, mass, and detailed particle size distribution of these rings remain poorly constrained. Using millimeter (1.3 - 3.1 mm) imaging from the Atacama Large (sub-)Millimeter Array and mid-infrared (18.7 $\\mu$m) imaging from the Very Large Telescope VISIR instrument, we observed the thermal component of the Uranian ring system for the first time. The $\\epsilon$ ring is detected strongly and can be"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.12566","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":"2026-05-17T23:40:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7O8yeDLstt97mXaLJQzQXmEHec7tWf+fv8dAMKYRjNKfRVlEXyZfL2vZnv9n1UGeuiSDhaZyBJ87sn6QE4XLDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T23:12:24.681796Z"},"content_sha256":"396b9b94d7197ebd16c724d4c761071a1a942fde44558d3ef04d48edd212d2fa","schema_version":"1.0","event_id":"sha256:396b9b94d7197ebd16c724d4c761071a1a942fde44558d3ef04d48edd212d2fa"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QTGF6EAUOMDOYZP2FWZ7KRSM5O/bundle.json","state_url":"https://pith.science/pith/QTGF6EAUOMDOYZP2FWZ7KRSM5O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QTGF6EAUOMDOYZP2FWZ7KRSM5O/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":"2026-06-24T23:12:24Z","links":{"resolver":"https://pith.science/pith/QTGF6EAUOMDOYZP2FWZ7KRSM5O","bundle":"https://pith.science/pith/QTGF6EAUOMDOYZP2FWZ7KRSM5O/bundle.json","state":"https://pith.science/pith/QTGF6EAUOMDOYZP2FWZ7KRSM5O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QTGF6EAUOMDOYZP2FWZ7KRSM5O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:QTGF6EAUOMDOYZP2FWZ7KRSM5O","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":"7a56467ffad17457a10a668603899ac763459b3baf7a27acb7a614078e7deb44","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-05-29T16:17:10Z","title_canon_sha256":"989f5e22348917a1006cc1177fae236af6ad701f33e9e00e2c9331851a7c5642"},"schema_version":"1.0","source":{"id":"1905.12566","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.12566","created_at":"2026-05-17T23:40:31Z"},{"alias_kind":"arxiv_version","alias_value":"1905.12566v1","created_at":"2026-05-17T23:40:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.12566","created_at":"2026-05-17T23:40:31Z"},{"alias_kind":"pith_short_12","alias_value":"QTGF6EAUOMDO","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"QTGF6EAUOMDOYZP2","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"QTGF6EAU","created_at":"2026-05-18T12:33:27Z"}],"graph_snapshots":[{"event_id":"sha256:396b9b94d7197ebd16c724d4c761071a1a942fde44558d3ef04d48edd212d2fa","target":"graph","created_at":"2026-05-17T23:40:31Z","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":"The narrow main rings of Uranus are composed of almost exclusively centimeter- to meter-sized particles, with a very small or nonexistent dust component; however, the filling factor, composition, thickness, mass, and detailed particle size distribution of these rings remain poorly constrained. Using millimeter (1.3 - 3.1 mm) imaging from the Atacama Large (sub-)Millimeter Array and mid-infrared (18.7 $\\mu$m) imaging from the Very Large Telescope VISIR instrument, we observed the thermal component of the Uranian ring system for the first time. The $\\epsilon$ ring is detected strongly and can be","authors_text":"Edward M. Molter, Imke de Pater, Leigh N. Fletcher, Michael T. Roman","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-05-29T16:17:10Z","title":"Thermal Emission from the Uranian Ring System"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.12566","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:c6d551d80c737010fda91461f52f9df7b624638414cafc1beb51fd3a44bb8894","target":"record","created_at":"2026-05-17T23:40:31Z","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":"7a56467ffad17457a10a668603899ac763459b3baf7a27acb7a614078e7deb44","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-05-29T16:17:10Z","title_canon_sha256":"989f5e22348917a1006cc1177fae236af6ad701f33e9e00e2c9331851a7c5642"},"schema_version":"1.0","source":{"id":"1905.12566","kind":"arxiv","version":1}},"canonical_sha256":"84cc5f10147306ec65fa2db3f5464cebb71cf2242a7cfa92121b0797c2417f6b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"84cc5f10147306ec65fa2db3f5464cebb71cf2242a7cfa92121b0797c2417f6b","first_computed_at":"2026-05-17T23:40:31.683640Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:40:31.683640Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dUN/N74RuwdIlGBIykr9CEWp3PYEAQxtwaJQzfFWXrzFO95OQYCmC5Fc9zonTAvvew90MiFMrZbdjP8FIQtkCg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:40:31.684074Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.12566","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c6d551d80c737010fda91461f52f9df7b624638414cafc1beb51fd3a44bb8894","sha256:396b9b94d7197ebd16c724d4c761071a1a942fde44558d3ef04d48edd212d2fa"],"state_sha256":"d2010c457210b9c57d5b57670377cac06b7b3a4f8bc6ed51a432aed6b121a1b9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"unI0gukyYB9vNTCkXeeICsvhS5hwYNE0f/Fx+YLXBnED1yV1up9FIMmdhgAYlyPTmzupsWDMH565hq6H3GlXAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T23:12:24.683772Z","bundle_sha256":"b658daace4c99b944c0a82aa0479bd2d6867c88ec6b6b83f6b4077734f9168a1"}}