{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:ZZGKCAD43EWOUANL2QA3ASBAOR","short_pith_number":"pith:ZZGKCAD4","canonical_record":{"source":{"id":"1602.02090","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-02-05T16:42:57Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"dfaea01330c7b758b896ba7e7f0c0322b11d6aa3f77bff3ffcd34ea5a69ce322","abstract_canon_sha256":"36984e87292f68511cbfa30fca714ce9a42a0b8f9134b83fe23e8548a0cc0363"},"schema_version":"1.0"},"canonical_sha256":"ce4ca1007cd92cea01abd401b04820747c09c163d3fba5a78f08cf80bb657e4c","source":{"kind":"arxiv","id":"1602.02090","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.02090","created_at":"2026-05-18T01:19:01Z"},{"alias_kind":"arxiv_version","alias_value":"1602.02090v1","created_at":"2026-05-18T01:19:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.02090","created_at":"2026-05-18T01:19:01Z"},{"alias_kind":"pith_short_12","alias_value":"ZZGKCAD43EWO","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"ZZGKCAD43EWOUANL","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"ZZGKCAD4","created_at":"2026-05-18T12:30:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:ZZGKCAD43EWOUANL2QA3ASBAOR","target":"record","payload":{"canonical_record":{"source":{"id":"1602.02090","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-02-05T16:42:57Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"dfaea01330c7b758b896ba7e7f0c0322b11d6aa3f77bff3ffcd34ea5a69ce322","abstract_canon_sha256":"36984e87292f68511cbfa30fca714ce9a42a0b8f9134b83fe23e8548a0cc0363"},"schema_version":"1.0"},"canonical_sha256":"ce4ca1007cd92cea01abd401b04820747c09c163d3fba5a78f08cf80bb657e4c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:19:01.068383Z","signature_b64":"AdfiR8s/D6MyZna0Y/GX4WWww1Ex5jc5kSDEHJwwR2I01u6bU9CKZSHH58SmtT24WuT7axJ4384njB+RqwGHBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ce4ca1007cd92cea01abd401b04820747c09c163d3fba5a78f08cf80bb657e4c","last_reissued_at":"2026-05-18T01:19:01.067993Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:19:01.067993Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1602.02090","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":"2026-05-18T01:19:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZJNsxBISyFeEfqAhj8auOaI1lZG2BokG18Hz1prnF4eyysA+/nLojSlAS4NvBVQ0NzDBys4NGjL0svHjjumMDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T05:52:21.295870Z"},"content_sha256":"61c45ad02d82b479a981b64e43cea2336f6702c3154f016697fcaee675bdad1a","schema_version":"1.0","event_id":"sha256:61c45ad02d82b479a981b64e43cea2336f6702c3154f016697fcaee675bdad1a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:ZZGKCAD43EWOUANL2QA3ASBAOR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The inner structure of the TW Hya Disk as revealed in scattered light","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.SR","authors_text":"G. Schneider, H. Jang-Condell, J. H. Debes","submitted_at":"2016-02-05T16:42:57Z","abstract_excerpt":"We observe a significant change in the TW Hya disk interior to 40~AU via archival unpolarized multi-wavelength Hubble Space Telescope/STIS and NICMOS images with an inner working angle (IWA) of 0\\farcs4 (22~AU). Our images show the outer edge of a clearing at every wavelength with similar behavior, demonstrating that the feature is structural, rather than due to some property of polarized light in the disk. We compare our observations to those taken by Akiyama et al. (2015) and Rapson et al. (2015), and discuss the spectral evolution of the disk interior to 80~AU. We construct a model with two"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.02090","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":"2026-05-18T01:19:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XBLLP7j6qfHylZtSVW4oEWX5EIaXsyx6N9zpGcDwYr7/s9QFkhx3tGFa3nt5AzQW8eMwy0QWeKoe6QCJb148CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T05:52:21.296488Z"},"content_sha256":"a41bb4812066aa4a4f95f774ba4d11fdcfd8e6c40fdf56a1778d79eb68d8eb2e","schema_version":"1.0","event_id":"sha256:a41bb4812066aa4a4f95f774ba4d11fdcfd8e6c40fdf56a1778d79eb68d8eb2e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZZGKCAD43EWOUANL2QA3ASBAOR/bundle.json","state_url":"https://pith.science/pith/ZZGKCAD43EWOUANL2QA3ASBAOR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZZGKCAD43EWOUANL2QA3ASBAOR/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":"2026-05-26T05:52:21Z","links":{"resolver":"https://pith.science/pith/ZZGKCAD43EWOUANL2QA3ASBAOR","bundle":"https://pith.science/pith/ZZGKCAD43EWOUANL2QA3ASBAOR/bundle.json","state":"https://pith.science/pith/ZZGKCAD43EWOUANL2QA3ASBAOR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZZGKCAD43EWOUANL2QA3ASBAOR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:ZZGKCAD43EWOUANL2QA3ASBAOR","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":"36984e87292f68511cbfa30fca714ce9a42a0b8f9134b83fe23e8548a0cc0363","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-02-05T16:42:57Z","title_canon_sha256":"dfaea01330c7b758b896ba7e7f0c0322b11d6aa3f77bff3ffcd34ea5a69ce322"},"schema_version":"1.0","source":{"id":"1602.02090","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.02090","created_at":"2026-05-18T01:19:01Z"},{"alias_kind":"arxiv_version","alias_value":"1602.02090v1","created_at":"2026-05-18T01:19:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.02090","created_at":"2026-05-18T01:19:01Z"},{"alias_kind":"pith_short_12","alias_value":"ZZGKCAD43EWO","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"ZZGKCAD43EWOUANL","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"ZZGKCAD4","created_at":"2026-05-18T12:30:55Z"}],"graph_snapshots":[{"event_id":"sha256:a41bb4812066aa4a4f95f774ba4d11fdcfd8e6c40fdf56a1778d79eb68d8eb2e","target":"graph","created_at":"2026-05-18T01:19:01Z","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 observe a significant change in the TW Hya disk interior to 40~AU via archival unpolarized multi-wavelength Hubble Space Telescope/STIS and NICMOS images with an inner working angle (IWA) of 0\\farcs4 (22~AU). Our images show the outer edge of a clearing at every wavelength with similar behavior, demonstrating that the feature is structural, rather than due to some property of polarized light in the disk. We compare our observations to those taken by Akiyama et al. (2015) and Rapson et al. (2015), and discuss the spectral evolution of the disk interior to 80~AU. We construct a model with two","authors_text":"G. Schneider, H. Jang-Condell, J. H. Debes","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-02-05T16:42:57Z","title":"The inner structure of the TW Hya Disk as revealed in scattered light"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.02090","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":"sha256:61c45ad02d82b479a981b64e43cea2336f6702c3154f016697fcaee675bdad1a","target":"record","created_at":"2026-05-18T01:19:01Z","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":"36984e87292f68511cbfa30fca714ce9a42a0b8f9134b83fe23e8548a0cc0363","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-02-05T16:42:57Z","title_canon_sha256":"dfaea01330c7b758b896ba7e7f0c0322b11d6aa3f77bff3ffcd34ea5a69ce322"},"schema_version":"1.0","source":{"id":"1602.02090","kind":"arxiv","version":1}},"canonical_sha256":"ce4ca1007cd92cea01abd401b04820747c09c163d3fba5a78f08cf80bb657e4c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ce4ca1007cd92cea01abd401b04820747c09c163d3fba5a78f08cf80bb657e4c","first_computed_at":"2026-05-18T01:19:01.067993Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:19:01.067993Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AdfiR8s/D6MyZna0Y/GX4WWww1Ex5jc5kSDEHJwwR2I01u6bU9CKZSHH58SmtT24WuT7axJ4384njB+RqwGHBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:19:01.068383Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.02090","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:61c45ad02d82b479a981b64e43cea2336f6702c3154f016697fcaee675bdad1a","sha256:a41bb4812066aa4a4f95f774ba4d11fdcfd8e6c40fdf56a1778d79eb68d8eb2e"],"state_sha256":"a75d8a93bd29e24f8b9a1bfab2ada2637a1862113c850264dfe1178a8d783c94"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5/45ymB8lFAtGL2B1VIs2wcqHBZc4HzdeebgYke6hYTrC9HZ61N5993Tao0w6nU2+ofBM9ohaVXelYFrNLBDAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T05:52:21.299270Z","bundle_sha256":"d4d5c455848f292e82d260399ccee7fe6e203d06efc9fc64453d2477c551a96a"}}