{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:66MSAIBCM3HWGHWUXGWFWH4AZ3","short_pith_number":"pith:66MSAIBC","canonical_record":{"source":{"id":"1801.03900","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-11T17:53:42Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"99b26455ad1e7a7ffbfdaa4ef668bacb3002ccc8cc7c2cc28ca402626944da7e","abstract_canon_sha256":"c2f11f09da2c72d75388b796c713b9f581130ade7486b822dc604aec242cd6b6"},"schema_version":"1.0"},"canonical_sha256":"f79920202266cf631ed4b9ac5b1f80ceee9faa0ce7c9d0fdb1b725554f729c42","source":{"kind":"arxiv","id":"1801.03900","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.03900","created_at":"2026-05-18T00:22:23Z"},{"alias_kind":"arxiv_version","alias_value":"1801.03900v1","created_at":"2026-05-18T00:22:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.03900","created_at":"2026-05-18T00:22:23Z"},{"alias_kind":"pith_short_12","alias_value":"66MSAIBCM3HW","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"66MSAIBCM3HWGHWU","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"66MSAIBC","created_at":"2026-05-18T12:32:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:66MSAIBCM3HWGHWUXGWFWH4AZ3","target":"record","payload":{"canonical_record":{"source":{"id":"1801.03900","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-11T17:53:42Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"99b26455ad1e7a7ffbfdaa4ef668bacb3002ccc8cc7c2cc28ca402626944da7e","abstract_canon_sha256":"c2f11f09da2c72d75388b796c713b9f581130ade7486b822dc604aec242cd6b6"},"schema_version":"1.0"},"canonical_sha256":"f79920202266cf631ed4b9ac5b1f80ceee9faa0ce7c9d0fdb1b725554f729c42","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:22:23.255796Z","signature_b64":"XcgL0njC1vfsnRtJufvXT/vB/giOCbPccOhCyNTpBV4nsIxy6Ep0nZdgbAGNYImjMnmQNZJ6RyiZd9LTEdhbBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f79920202266cf631ed4b9ac5b1f80ceee9faa0ce7c9d0fdb1b725554f729c42","last_reissued_at":"2026-05-18T00:22:23.255230Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:22:23.255230Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1801.03900","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":"2026-05-18T00:22:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YIk+1aJOqex75EEyfB7wTmHUiWFfrHMHfcaOfHE8KTduIFG/+UnN87FyjEDa40Sy0TJ9as7vffsIdzjCN531Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T12:47:01.932297Z"},"content_sha256":"7f10a73088ee28a6123d242242581b92b680678e8a223252886f48bc0f4bf496","schema_version":"1.0","event_id":"sha256:7f10a73088ee28a6123d242242581b92b680678e8a223252886f48bc0f4bf496"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:66MSAIBCM3HWGHWUXGWFWH4AZ3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Orbit of the Companion to HD 100453A: Binary-Driven Spiral Arms in a Protoplanetary Disk","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.SR","authors_text":"Daniel Apai, Jared Males, Jeffrey Fung, Katie M. Morzinski, Kevin Wagner, Laird Close, Markus Kasper, Melissa McClure, Patrick Sheehan, Phil Hinz, Ruobing Dong, Sascha P. Quanz","submitted_at":"2018-01-11T17:53:42Z","abstract_excerpt":"HD 100453AB is a 10+/-2 Myr old binary whose protoplanetary disk was recently revealed to host a global two-armed spiral structure. Given the relatively small projected separation of the binary (1.05\", or ~108 au), gravitational perturbations by the binary seemed to be a likely driving force behind the formation of the spiral arms. However, the orbit of these stars remained poorly understood, which prevented a proper treatment of the dynamical influence of the companion on the disk. We observed HD 100453AB between 2015-2017 utilizing extreme adaptive optics systems on the Very Large Telescope "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.03900","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":"2026-05-18T00:22:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uby4cGVeb9FwPbiwmrD/C0pf05An/mlF/xWCpe2MPdoJBuemdia0XbAmBK3rByr0iO9bIfHCuqq7LIe3RncEBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T12:47:01.932682Z"},"content_sha256":"3350ef5cdc0f121f884f25f8777a5f1c6c2d44b776f4ff8a9d012c793d2721c3","schema_version":"1.0","event_id":"sha256:3350ef5cdc0f121f884f25f8777a5f1c6c2d44b776f4ff8a9d012c793d2721c3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/66MSAIBCM3HWGHWUXGWFWH4AZ3/bundle.json","state_url":"https://pith.science/pith/66MSAIBCM3HWGHWUXGWFWH4AZ3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/66MSAIBCM3HWGHWUXGWFWH4AZ3/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":"2026-05-31T12:47:01Z","links":{"resolver":"https://pith.science/pith/66MSAIBCM3HWGHWUXGWFWH4AZ3","bundle":"https://pith.science/pith/66MSAIBCM3HWGHWUXGWFWH4AZ3/bundle.json","state":"https://pith.science/pith/66MSAIBCM3HWGHWUXGWFWH4AZ3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/66MSAIBCM3HWGHWUXGWFWH4AZ3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:66MSAIBCM3HWGHWUXGWFWH4AZ3","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":"c2f11f09da2c72d75388b796c713b9f581130ade7486b822dc604aec242cd6b6","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-11T17:53:42Z","title_canon_sha256":"99b26455ad1e7a7ffbfdaa4ef668bacb3002ccc8cc7c2cc28ca402626944da7e"},"schema_version":"1.0","source":{"id":"1801.03900","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.03900","created_at":"2026-05-18T00:22:23Z"},{"alias_kind":"arxiv_version","alias_value":"1801.03900v1","created_at":"2026-05-18T00:22:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.03900","created_at":"2026-05-18T00:22:23Z"},{"alias_kind":"pith_short_12","alias_value":"66MSAIBCM3HW","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"66MSAIBCM3HWGHWU","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"66MSAIBC","created_at":"2026-05-18T12:32:08Z"}],"graph_snapshots":[{"event_id":"sha256:3350ef5cdc0f121f884f25f8777a5f1c6c2d44b776f4ff8a9d012c793d2721c3","target":"graph","created_at":"2026-05-18T00:22:23Z","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":"HD 100453AB is a 10+/-2 Myr old binary whose protoplanetary disk was recently revealed to host a global two-armed spiral structure. Given the relatively small projected separation of the binary (1.05\", or ~108 au), gravitational perturbations by the binary seemed to be a likely driving force behind the formation of the spiral arms. However, the orbit of these stars remained poorly understood, which prevented a proper treatment of the dynamical influence of the companion on the disk. We observed HD 100453AB between 2015-2017 utilizing extreme adaptive optics systems on the Very Large Telescope ","authors_text":"Daniel Apai, Jared Males, Jeffrey Fung, Katie M. Morzinski, Kevin Wagner, Laird Close, Markus Kasper, Melissa McClure, Patrick Sheehan, Phil Hinz, Ruobing Dong, Sascha P. Quanz","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-11T17:53:42Z","title":"The Orbit of the Companion to HD 100453A: Binary-Driven Spiral Arms in a Protoplanetary Disk"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.03900","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":"sha256:7f10a73088ee28a6123d242242581b92b680678e8a223252886f48bc0f4bf496","target":"record","created_at":"2026-05-18T00:22:23Z","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":"c2f11f09da2c72d75388b796c713b9f581130ade7486b822dc604aec242cd6b6","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-11T17:53:42Z","title_canon_sha256":"99b26455ad1e7a7ffbfdaa4ef668bacb3002ccc8cc7c2cc28ca402626944da7e"},"schema_version":"1.0","source":{"id":"1801.03900","kind":"arxiv","version":1}},"canonical_sha256":"f79920202266cf631ed4b9ac5b1f80ceee9faa0ce7c9d0fdb1b725554f729c42","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f79920202266cf631ed4b9ac5b1f80ceee9faa0ce7c9d0fdb1b725554f729c42","first_computed_at":"2026-05-18T00:22:23.255230Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:22:23.255230Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XcgL0njC1vfsnRtJufvXT/vB/giOCbPccOhCyNTpBV4nsIxy6Ep0nZdgbAGNYImjMnmQNZJ6RyiZd9LTEdhbBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:22:23.255796Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.03900","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7f10a73088ee28a6123d242242581b92b680678e8a223252886f48bc0f4bf496","sha256:3350ef5cdc0f121f884f25f8777a5f1c6c2d44b776f4ff8a9d012c793d2721c3"],"state_sha256":"407d52584fd3290fd49a4f4fab750fcc4bd1be1e5419ef6434dfda1a9c89c614"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TTS0fecDgc3DtaU7VR1V+Awa0BL7uwySpk9WOtbp+Nz5NcenN5A7j9qFYD1m66gZU0XK7ltr5fnNey+PTikmBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T12:47:01.935392Z","bundle_sha256":"56f24dc958ab7c1b12ebc86a5d0ad365330d90737e91f9b8934094c5f18066d4"}}