{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:QS45TQ4ESV7SXFKTUEVA6QYNRV","short_pith_number":"pith:QS45TQ4E","canonical_record":{"source":{"id":"1506.03391","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-06-10T16:51:29Z","cross_cats_sorted":[],"title_canon_sha256":"5971c91453e9c3de8324f2359ae6ae8b7d475c479ded888b772446eea41aab1b","abstract_canon_sha256":"bf35d80b7d102bd70e2df5ff547aaff07030f7204b692cb860d229222ccd93c8"},"schema_version":"1.0"},"canonical_sha256":"84b9d9c384957f2b9553a12a0f430d8d75f3e3bc4784688d2907967cf1b25acf","source":{"kind":"arxiv","id":"1506.03391","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.03391","created_at":"2026-05-18T01:35:47Z"},{"alias_kind":"arxiv_version","alias_value":"1506.03391v1","created_at":"2026-05-18T01:35:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.03391","created_at":"2026-05-18T01:35:47Z"},{"alias_kind":"pith_short_12","alias_value":"QS45TQ4ESV7S","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"QS45TQ4ESV7SXFKT","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"QS45TQ4E","created_at":"2026-05-18T12:29:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:QS45TQ4ESV7SXFKTUEVA6QYNRV","target":"record","payload":{"canonical_record":{"source":{"id":"1506.03391","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-06-10T16:51:29Z","cross_cats_sorted":[],"title_canon_sha256":"5971c91453e9c3de8324f2359ae6ae8b7d475c479ded888b772446eea41aab1b","abstract_canon_sha256":"bf35d80b7d102bd70e2df5ff547aaff07030f7204b692cb860d229222ccd93c8"},"schema_version":"1.0"},"canonical_sha256":"84b9d9c384957f2b9553a12a0f430d8d75f3e3bc4784688d2907967cf1b25acf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:35:47.080694Z","signature_b64":"uF0ylGB07mBm/szCG8K51LU7pfIOLWdtUyrHhMoUnP7zF3u+aDD8NZvZqkRK4nbTxvwFacZ913/T0vRYk/GBBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"84b9d9c384957f2b9553a12a0f430d8d75f3e3bc4784688d2907967cf1b25acf","last_reissued_at":"2026-05-18T01:35:47.079998Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:35:47.079998Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1506.03391","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":"2026-05-18T01:35:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JQ/kUzg78OkPm2GSjMgBCL1A86lE9LV+k7XKE7L8X3RQA0RUUM3QM1oBOMqIu8pIQg5RD3WMRwTlHdzKBQt1Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T06:29:07.142403Z"},"content_sha256":"0d4be8ec6e71f9bca870d00d2c49cd4ce01ae05493915f127964ee9bc8439beb","schema_version":"1.0","event_id":"sha256:0d4be8ec6e71f9bca870d00d2c49cd4ce01ae05493915f127964ee9bc8439beb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:QS45TQ4ESV7SXFKTUEVA6QYNRV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"ALMA Observations of the Largest Proto-Planetary Disk in the Orion Nebula, 114-426: A CO Silhouette","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Brenda Matthews, Doug Johnstone, James Di Francesco, John Bally, Jonathan P. Williams, Josh Eisner, Luca Ricci, Meredith Hughes, Rita K. Mann, Sean M. Andrews","submitted_at":"2015-06-10T16:51:29Z","abstract_excerpt":"We present ALMA observations of the largest protoplanetary disk in the Orion Nebula, 114-426. Detectable 345 GHz (856 micron) dust continuum is produced only in the 350 AU central region of the ~1000 AU diameter silhouette seen against the bright H-alpha background in HST images. Assuming optically thin dust emission at 345 GHz, a gas-to-dust ratio of 100, and a grain temperature of 20 K, the disk gas-mass is estimated to be 3.1 +/- 0.6 Jupiter masses. If most solids and ices have have been incorporated into large grains, however, this value is a lower limit. The disk is not detected in dense-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.03391","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":"2026-05-18T01:35:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OxqMvXvrS1XaPjrex9dwV4Z4//ApDPsoMVta91qu+gwibMmnS8hI6ExM3xsdW8PkkSZonpG5h965DnCOazwjCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T06:29:07.143096Z"},"content_sha256":"f8a2ea3aced2a65b1fe65b6a8cd95e1fa89b9b863eca4e3d016f7eeea7550672","schema_version":"1.0","event_id":"sha256:f8a2ea3aced2a65b1fe65b6a8cd95e1fa89b9b863eca4e3d016f7eeea7550672"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QS45TQ4ESV7SXFKTUEVA6QYNRV/bundle.json","state_url":"https://pith.science/pith/QS45TQ4ESV7SXFKTUEVA6QYNRV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QS45TQ4ESV7SXFKTUEVA6QYNRV/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":"2026-06-06T06:29:07Z","links":{"resolver":"https://pith.science/pith/QS45TQ4ESV7SXFKTUEVA6QYNRV","bundle":"https://pith.science/pith/QS45TQ4ESV7SXFKTUEVA6QYNRV/bundle.json","state":"https://pith.science/pith/QS45TQ4ESV7SXFKTUEVA6QYNRV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QS45TQ4ESV7SXFKTUEVA6QYNRV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:QS45TQ4ESV7SXFKTUEVA6QYNRV","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":"bf35d80b7d102bd70e2df5ff547aaff07030f7204b692cb860d229222ccd93c8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-06-10T16:51:29Z","title_canon_sha256":"5971c91453e9c3de8324f2359ae6ae8b7d475c479ded888b772446eea41aab1b"},"schema_version":"1.0","source":{"id":"1506.03391","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.03391","created_at":"2026-05-18T01:35:47Z"},{"alias_kind":"arxiv_version","alias_value":"1506.03391v1","created_at":"2026-05-18T01:35:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.03391","created_at":"2026-05-18T01:35:47Z"},{"alias_kind":"pith_short_12","alias_value":"QS45TQ4ESV7S","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"QS45TQ4ESV7SXFKT","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"QS45TQ4E","created_at":"2026-05-18T12:29:37Z"}],"graph_snapshots":[{"event_id":"sha256:f8a2ea3aced2a65b1fe65b6a8cd95e1fa89b9b863eca4e3d016f7eeea7550672","target":"graph","created_at":"2026-05-18T01:35:47Z","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 present ALMA observations of the largest protoplanetary disk in the Orion Nebula, 114-426. Detectable 345 GHz (856 micron) dust continuum is produced only in the 350 AU central region of the ~1000 AU diameter silhouette seen against the bright H-alpha background in HST images. Assuming optically thin dust emission at 345 GHz, a gas-to-dust ratio of 100, and a grain temperature of 20 K, the disk gas-mass is estimated to be 3.1 +/- 0.6 Jupiter masses. If most solids and ices have have been incorporated into large grains, however, this value is a lower limit. The disk is not detected in dense-","authors_text":"Brenda Matthews, Doug Johnstone, James Di Francesco, John Bally, Jonathan P. Williams, Josh Eisner, Luca Ricci, Meredith Hughes, Rita K. Mann, Sean M. Andrews","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-06-10T16:51:29Z","title":"ALMA Observations of the Largest Proto-Planetary Disk in the Orion Nebula, 114-426: A CO Silhouette"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.03391","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":"sha256:0d4be8ec6e71f9bca870d00d2c49cd4ce01ae05493915f127964ee9bc8439beb","target":"record","created_at":"2026-05-18T01:35:47Z","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":"bf35d80b7d102bd70e2df5ff547aaff07030f7204b692cb860d229222ccd93c8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-06-10T16:51:29Z","title_canon_sha256":"5971c91453e9c3de8324f2359ae6ae8b7d475c479ded888b772446eea41aab1b"},"schema_version":"1.0","source":{"id":"1506.03391","kind":"arxiv","version":1}},"canonical_sha256":"84b9d9c384957f2b9553a12a0f430d8d75f3e3bc4784688d2907967cf1b25acf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"84b9d9c384957f2b9553a12a0f430d8d75f3e3bc4784688d2907967cf1b25acf","first_computed_at":"2026-05-18T01:35:47.079998Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:35:47.079998Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uF0ylGB07mBm/szCG8K51LU7pfIOLWdtUyrHhMoUnP7zF3u+aDD8NZvZqkRK4nbTxvwFacZ913/T0vRYk/GBBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:35:47.080694Z","signed_message":"canonical_sha256_bytes"},"source_id":"1506.03391","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0d4be8ec6e71f9bca870d00d2c49cd4ce01ae05493915f127964ee9bc8439beb","sha256:f8a2ea3aced2a65b1fe65b6a8cd95e1fa89b9b863eca4e3d016f7eeea7550672"],"state_sha256":"53724f21afce7dcdff3c10c77e678876a5b7746d34773972098563b314212ffd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mAFDl+wsjRmFRJ5Odqu2BgLmQ89tE9j9Em2k3ZtQZg4JAyFfSFx++A58OoDJyrnf1LohOcrzGj+DWLEeQdUBCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T06:29:07.146670Z","bundle_sha256":"fc5f30dd200d8638ff387aab3e3930261f90f3a6cae2500227634b077989b660"}}