{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:XBXUUIZ52PXTN4XK4PICJHXDUS","short_pith_number":"pith:XBXUUIZ5","canonical_record":{"source":{"id":"1601.06801","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-01-25T21:07:18Z","cross_cats_sorted":[],"title_canon_sha256":"fb6acbce14771f265f6066c66d94a151814fe13840b2d2635d900a0c131def19","abstract_canon_sha256":"9a36f065a8af2e86fe622fc6bd092f4bc2063469eb58311d2f21c3fd971cf259"},"schema_version":"1.0"},"canonical_sha256":"b86f4a233dd3ef36f2eae3d0249ee3a4acfc72ef19f49eb0a9d4a45c24e77251","source":{"kind":"arxiv","id":"1601.06801","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.06801","created_at":"2026-05-18T01:19:24Z"},{"alias_kind":"arxiv_version","alias_value":"1601.06801v1","created_at":"2026-05-18T01:19:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.06801","created_at":"2026-05-18T01:19:24Z"},{"alias_kind":"pith_short_12","alias_value":"XBXUUIZ52PXT","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"XBXUUIZ52PXTN4XK","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"XBXUUIZ5","created_at":"2026-05-18T12:30:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:XBXUUIZ52PXTN4XK4PICJHXDUS","target":"record","payload":{"canonical_record":{"source":{"id":"1601.06801","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-01-25T21:07:18Z","cross_cats_sorted":[],"title_canon_sha256":"fb6acbce14771f265f6066c66d94a151814fe13840b2d2635d900a0c131def19","abstract_canon_sha256":"9a36f065a8af2e86fe622fc6bd092f4bc2063469eb58311d2f21c3fd971cf259"},"schema_version":"1.0"},"canonical_sha256":"b86f4a233dd3ef36f2eae3d0249ee3a4acfc72ef19f49eb0a9d4a45c24e77251","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:19:24.665056Z","signature_b64":"0rLDJGze/78+jHE/OrPBolx+Gwq6GwWBN6/1PU1NjXoAPhuNi+/e/8yRhpH9v4OYw1coQeI59Hnu1cXfOOZ4Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b86f4a233dd3ef36f2eae3d0249ee3a4acfc72ef19f49eb0a9d4a45c24e77251","last_reissued_at":"2026-05-18T01:19:24.664240Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:19:24.664240Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1601.06801","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":"2026-05-18T01:19:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lRdRo4pHXS8DymGq3Ov1TbI/QeqSCMPmB/Lq1QYTx1mbT6gHNir5+DiBWIEytZ2ddZpnd7i/6mY/K94HwiuGDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T13:05:53.770771Z"},"content_sha256":"c94e82e039a3341557358d9820e296aee9a087f97929996b49ed3cb7571871ce","schema_version":"1.0","event_id":"sha256:c94e82e039a3341557358d9820e296aee9a087f97929996b49ed3cb7571871ce"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:XBXUUIZ52PXTN4XK4PICJHXDUS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A ring-like concentration of mm-sized particles in Sz 91","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Hales, A. Hardy, C. Caceres, F. M\\'enard, H. Canovas, L. Cieza, M. R. Schreiber","submitted_at":"2016-01-25T21:07:18Z","abstract_excerpt":"Models of planet formation and disc evolution predict a variety of observables in the dust structure of protoplanetary discs. Here we present Atacama Large Millimeter/submillimeter Array (ALMA) Band-6 and Band-7 observations of the transition disc Sz\\,91 showing that the continuum emission at 870$\\mu$m, which is dominated by emission from large dust grains, is localized in an optically thin narrow ring. We find that most of the emission ($\\sim95\\%$) is concentrated in a ring located at 110 au from the central star that is only about 44 au wide. In contrast, the $^{12}\\mathrm{CO}$ (2-1) emissio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.06801","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":"2026-05-18T01:19:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Tz1RLSfmD8Dt7SzMmQsbRJIf5mFTsyYtsU3FuID8w6PgZ+WSWxm3TubxO8OXynczMVLbYH2ZleFVe97QeqTODA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T13:05:53.771486Z"},"content_sha256":"56b808a87b19a9b0c1840f3a1c940b3b627c9d231b6d06995f4305704958f6eb","schema_version":"1.0","event_id":"sha256:56b808a87b19a9b0c1840f3a1c940b3b627c9d231b6d06995f4305704958f6eb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XBXUUIZ52PXTN4XK4PICJHXDUS/bundle.json","state_url":"https://pith.science/pith/XBXUUIZ52PXTN4XK4PICJHXDUS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XBXUUIZ52PXTN4XK4PICJHXDUS/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":"2026-05-27T13:05:53Z","links":{"resolver":"https://pith.science/pith/XBXUUIZ52PXTN4XK4PICJHXDUS","bundle":"https://pith.science/pith/XBXUUIZ52PXTN4XK4PICJHXDUS/bundle.json","state":"https://pith.science/pith/XBXUUIZ52PXTN4XK4PICJHXDUS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XBXUUIZ52PXTN4XK4PICJHXDUS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:XBXUUIZ52PXTN4XK4PICJHXDUS","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":"9a36f065a8af2e86fe622fc6bd092f4bc2063469eb58311d2f21c3fd971cf259","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-01-25T21:07:18Z","title_canon_sha256":"fb6acbce14771f265f6066c66d94a151814fe13840b2d2635d900a0c131def19"},"schema_version":"1.0","source":{"id":"1601.06801","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.06801","created_at":"2026-05-18T01:19:24Z"},{"alias_kind":"arxiv_version","alias_value":"1601.06801v1","created_at":"2026-05-18T01:19:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.06801","created_at":"2026-05-18T01:19:24Z"},{"alias_kind":"pith_short_12","alias_value":"XBXUUIZ52PXT","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"XBXUUIZ52PXTN4XK","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"XBXUUIZ5","created_at":"2026-05-18T12:30:51Z"}],"graph_snapshots":[{"event_id":"sha256:56b808a87b19a9b0c1840f3a1c940b3b627c9d231b6d06995f4305704958f6eb","target":"graph","created_at":"2026-05-18T01:19:24Z","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":"Models of planet formation and disc evolution predict a variety of observables in the dust structure of protoplanetary discs. Here we present Atacama Large Millimeter/submillimeter Array (ALMA) Band-6 and Band-7 observations of the transition disc Sz\\,91 showing that the continuum emission at 870$\\mu$m, which is dominated by emission from large dust grains, is localized in an optically thin narrow ring. We find that most of the emission ($\\sim95\\%$) is concentrated in a ring located at 110 au from the central star that is only about 44 au wide. In contrast, the $^{12}\\mathrm{CO}$ (2-1) emissio","authors_text":"A. Hales, A. Hardy, C. Caceres, F. M\\'enard, H. Canovas, L. Cieza, M. R. Schreiber","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-01-25T21:07:18Z","title":"A ring-like concentration of mm-sized particles in Sz 91"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.06801","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:c94e82e039a3341557358d9820e296aee9a087f97929996b49ed3cb7571871ce","target":"record","created_at":"2026-05-18T01:19:24Z","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":"9a36f065a8af2e86fe622fc6bd092f4bc2063469eb58311d2f21c3fd971cf259","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-01-25T21:07:18Z","title_canon_sha256":"fb6acbce14771f265f6066c66d94a151814fe13840b2d2635d900a0c131def19"},"schema_version":"1.0","source":{"id":"1601.06801","kind":"arxiv","version":1}},"canonical_sha256":"b86f4a233dd3ef36f2eae3d0249ee3a4acfc72ef19f49eb0a9d4a45c24e77251","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b86f4a233dd3ef36f2eae3d0249ee3a4acfc72ef19f49eb0a9d4a45c24e77251","first_computed_at":"2026-05-18T01:19:24.664240Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:19:24.664240Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0rLDJGze/78+jHE/OrPBolx+Gwq6GwWBN6/1PU1NjXoAPhuNi+/e/8yRhpH9v4OYw1coQeI59Hnu1cXfOOZ4Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:19:24.665056Z","signed_message":"canonical_sha256_bytes"},"source_id":"1601.06801","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c94e82e039a3341557358d9820e296aee9a087f97929996b49ed3cb7571871ce","sha256:56b808a87b19a9b0c1840f3a1c940b3b627c9d231b6d06995f4305704958f6eb"],"state_sha256":"729fa123616220c7d88ad4bed0841710d3f9b08dab49ce599971f5adcb053c64"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p2eNbLpDw6/XT39s/P2M0orv47znKi5BBheYQmhCZFTQ07xmOCBuyTpk6q5FUDo6TYAyEnH2uYQ11c4L3ZuOAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T13:05:53.775157Z","bundle_sha256":"ca68d5770b944e2eed46dca8bc0d49a98b4d01d6d72d7a177db10777e037b13c"}}