{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:XMAD7D2HCF3TM4CPKHOK6HSX2O","short_pith_number":"pith:XMAD7D2H","canonical_record":{"source":{"id":"2104.08379","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-04-16T21:30:16Z","cross_cats_sorted":[],"title_canon_sha256":"ee07a69046c13fbf0d6ab86263028d0d31f670dc009a78e0784de0f8f58f8528","abstract_canon_sha256":"8c033757776f8d1868e91639be6142959daeca34e9d04ff805c5fcdee965e15f"},"schema_version":"1.0"},"canonical_sha256":"bb003f8f47117736704f51dcaf1e57d3946d5e978ecd9f3a7482a84c904ca242","source":{"kind":"arxiv","id":"2104.08379","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.08379","created_at":"2026-07-05T03:08:28Z"},{"alias_kind":"arxiv_version","alias_value":"2104.08379v3","created_at":"2026-07-05T03:08:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.08379","created_at":"2026-07-05T03:08:28Z"},{"alias_kind":"pith_short_12","alias_value":"XMAD7D2HCF3T","created_at":"2026-07-05T03:08:28Z"},{"alias_kind":"pith_short_16","alias_value":"XMAD7D2HCF3TM4CP","created_at":"2026-07-05T03:08:28Z"},{"alias_kind":"pith_short_8","alias_value":"XMAD7D2H","created_at":"2026-07-05T03:08:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:XMAD7D2HCF3TM4CPKHOK6HSX2O","target":"record","payload":{"canonical_record":{"source":{"id":"2104.08379","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-04-16T21:30:16Z","cross_cats_sorted":[],"title_canon_sha256":"ee07a69046c13fbf0d6ab86263028d0d31f670dc009a78e0784de0f8f58f8528","abstract_canon_sha256":"8c033757776f8d1868e91639be6142959daeca34e9d04ff805c5fcdee965e15f"},"schema_version":"1.0"},"canonical_sha256":"bb003f8f47117736704f51dcaf1e57d3946d5e978ecd9f3a7482a84c904ca242","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:08:28.267856Z","signature_b64":"tXxq2woUbb9EUveEAbJibqqNlt25iSJRCHOSc3GjRP8Xk2d41vHOblMqsWx9cZA7kRXBopDu5mKUj+0vUS8UAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bb003f8f47117736704f51dcaf1e57d3946d5e978ecd9f3a7482a84c904ca242","last_reissued_at":"2026-07-05T03:08:28.267295Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:08:28.267295Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2104.08379","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:08:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cpiaGkn1A/iuGMnQQOf9IuH9y8xMP4HTIq1O2kfXXGF4Lq0O0pClDkAFLwe4CMz919xajCh6EFtkRq8x/kfIBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T14:40:48.155362Z"},"content_sha256":"4ee0d293b8692cd9b861ba47dc7ee962cf8a36c810eed4a1e3be242aaa9092e0","schema_version":"1.0","event_id":"sha256:4ee0d293b8692cd9b861ba47dc7ee962cf8a36c810eed4a1e3be242aaa9092e0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:XMAD7D2HCF3TM4CPKHOK6HSX2O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A dusty filament and turbulent CO spirals in HD135344B-SAO206462","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Andres Jordan, Barbara Ercolano, Carla Arce-Tord, Christian Flores, Christophe Pinte, Clement Baruteau, Daniel Price, Ewine van Dishoeck, Lucas Cieza, Maddalena Reggiani, Miguel Carcamo, Nienke van der Marel, Olivier Absil, Philipp Weber, Ruobing Dong, Sebastian Perez, Simon Casassus, Valentin Christiaens, Virginie Faramaz","submitted_at":"2021-04-16T21:30:16Z","abstract_excerpt":"Planet-disc interactions build up local pressure maxima that may halt the radial drift of protoplanetary dust, and pile it up in rings and crescents. ALMA observations of the HD135344B disc revealed two rings in the thermal continuum stemming from ~mm-sized dust. At higher frequencies the inner ring is brighter relative to the outer ring, which is also shaped as a crescent rather than a full ring. In near-IR scattered light images, the disc is modulated by a 2-armed grand-design spiral originating inside the ALMA inner ring. Such structures may be induced by a massive companion evacuating the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.08379","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2104.08379/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T03:08:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LpSGppZfctlwLqCxSWvQ1krYM+OLrKh5GFJOow5IFHRQJxa8UP0+x0CoLrrUubPeVcOS3W9AOXMiaH12otn4Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T14:40:48.155752Z"},"content_sha256":"b765f98e84aa13e943db7d50862967f25fe47e1918fc6698aefccf830e7ea764","schema_version":"1.0","event_id":"sha256:b765f98e84aa13e943db7d50862967f25fe47e1918fc6698aefccf830e7ea764"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XMAD7D2HCF3TM4CPKHOK6HSX2O/bundle.json","state_url":"https://pith.science/pith/XMAD7D2HCF3TM4CPKHOK6HSX2O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XMAD7D2HCF3TM4CPKHOK6HSX2O/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":"2026-07-07T14:40:48Z","links":{"resolver":"https://pith.science/pith/XMAD7D2HCF3TM4CPKHOK6HSX2O","bundle":"https://pith.science/pith/XMAD7D2HCF3TM4CPKHOK6HSX2O/bundle.json","state":"https://pith.science/pith/XMAD7D2HCF3TM4CPKHOK6HSX2O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XMAD7D2HCF3TM4CPKHOK6HSX2O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:XMAD7D2HCF3TM4CPKHOK6HSX2O","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":"8c033757776f8d1868e91639be6142959daeca34e9d04ff805c5fcdee965e15f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-04-16T21:30:16Z","title_canon_sha256":"ee07a69046c13fbf0d6ab86263028d0d31f670dc009a78e0784de0f8f58f8528"},"schema_version":"1.0","source":{"id":"2104.08379","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.08379","created_at":"2026-07-05T03:08:28Z"},{"alias_kind":"arxiv_version","alias_value":"2104.08379v3","created_at":"2026-07-05T03:08:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.08379","created_at":"2026-07-05T03:08:28Z"},{"alias_kind":"pith_short_12","alias_value":"XMAD7D2HCF3T","created_at":"2026-07-05T03:08:28Z"},{"alias_kind":"pith_short_16","alias_value":"XMAD7D2HCF3TM4CP","created_at":"2026-07-05T03:08:28Z"},{"alias_kind":"pith_short_8","alias_value":"XMAD7D2H","created_at":"2026-07-05T03:08:28Z"}],"graph_snapshots":[{"event_id":"sha256:b765f98e84aa13e943db7d50862967f25fe47e1918fc6698aefccf830e7ea764","target":"graph","created_at":"2026-07-05T03:08:28Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2104.08379/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Planet-disc interactions build up local pressure maxima that may halt the radial drift of protoplanetary dust, and pile it up in rings and crescents. ALMA observations of the HD135344B disc revealed two rings in the thermal continuum stemming from ~mm-sized dust. At higher frequencies the inner ring is brighter relative to the outer ring, which is also shaped as a crescent rather than a full ring. In near-IR scattered light images, the disc is modulated by a 2-armed grand-design spiral originating inside the ALMA inner ring. Such structures may be induced by a massive companion evacuating the ","authors_text":"Andres Jordan, Barbara Ercolano, Carla Arce-Tord, Christian Flores, Christophe Pinte, Clement Baruteau, Daniel Price, Ewine van Dishoeck, Lucas Cieza, Maddalena Reggiani, Miguel Carcamo, Nienke van der Marel, Olivier Absil, Philipp Weber, Ruobing Dong, Sebastian Perez, Simon Casassus, Valentin Christiaens, Virginie Faramaz","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-04-16T21:30:16Z","title":"A dusty filament and turbulent CO spirals in HD135344B-SAO206462"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.08379","kind":"arxiv","version":3},"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":"sha256:4ee0d293b8692cd9b861ba47dc7ee962cf8a36c810eed4a1e3be242aaa9092e0","target":"record","created_at":"2026-07-05T03:08:28Z","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":"8c033757776f8d1868e91639be6142959daeca34e9d04ff805c5fcdee965e15f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-04-16T21:30:16Z","title_canon_sha256":"ee07a69046c13fbf0d6ab86263028d0d31f670dc009a78e0784de0f8f58f8528"},"schema_version":"1.0","source":{"id":"2104.08379","kind":"arxiv","version":3}},"canonical_sha256":"bb003f8f47117736704f51dcaf1e57d3946d5e978ecd9f3a7482a84c904ca242","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bb003f8f47117736704f51dcaf1e57d3946d5e978ecd9f3a7482a84c904ca242","first_computed_at":"2026-07-05T03:08:28.267295Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:08:28.267295Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tXxq2woUbb9EUveEAbJibqqNlt25iSJRCHOSc3GjRP8Xk2d41vHOblMqsWx9cZA7kRXBopDu5mKUj+0vUS8UAg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:08:28.267856Z","signed_message":"canonical_sha256_bytes"},"source_id":"2104.08379","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4ee0d293b8692cd9b861ba47dc7ee962cf8a36c810eed4a1e3be242aaa9092e0","sha256:b765f98e84aa13e943db7d50862967f25fe47e1918fc6698aefccf830e7ea764"],"state_sha256":"52283cbc04305ef1b8c069783bff1295a3fe9ed1f363d303ca6d4b605e693cde"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Lgw0Nv7LrIOkoWEQ0bhmZxe/qM+7BMHdN6pSyABIN2DZMFysXKsUVUbqj4kADmW7K7Mj9k6sEdTOUtu7nYlGDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T14:40:48.157656Z","bundle_sha256":"f91d7a2b2e9953ab918af4aabb8f3a5ff22e2f38f22e5571cdd929cbe4a8c0dd"}}