{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:4QHP66SOUU7YWWOXC6Z5A7DHBE","short_pith_number":"pith:4QHP66SO","canonical_record":{"source":{"id":"1711.08652","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-11-23T11:19:12Z","cross_cats_sorted":[],"title_canon_sha256":"fd3a3026b9b0d80cee92205dbc5986f94a9b3967c320c268f26f830cc823b978","abstract_canon_sha256":"636f4544fee9aa439be1082e43aad9f2662d6a8782b967da8c5363c9ba6003a8"},"schema_version":"1.0"},"canonical_sha256":"e40eff7a4ea53f8b59d717b3d07c6709125b7a202e29ce1d9d78fa9fbbb70d33","source":{"kind":"arxiv","id":"1711.08652","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.08652","created_at":"2026-05-18T00:26:23Z"},{"alias_kind":"arxiv_version","alias_value":"1711.08652v1","created_at":"2026-05-18T00:26:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.08652","created_at":"2026-05-18T00:26:23Z"},{"alias_kind":"pith_short_12","alias_value":"4QHP66SOUU7Y","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_16","alias_value":"4QHP66SOUU7YWWOX","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_8","alias_value":"4QHP66SO","created_at":"2026-05-18T12:31:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:4QHP66SOUU7YWWOXC6Z5A7DHBE","target":"record","payload":{"canonical_record":{"source":{"id":"1711.08652","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-11-23T11:19:12Z","cross_cats_sorted":[],"title_canon_sha256":"fd3a3026b9b0d80cee92205dbc5986f94a9b3967c320c268f26f830cc823b978","abstract_canon_sha256":"636f4544fee9aa439be1082e43aad9f2662d6a8782b967da8c5363c9ba6003a8"},"schema_version":"1.0"},"canonical_sha256":"e40eff7a4ea53f8b59d717b3d07c6709125b7a202e29ce1d9d78fa9fbbb70d33","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:26:23.719411Z","signature_b64":"QPXumuXwqa8JumCSTiSs+9SA8/rMjbosRwdHNpbpC0QdZWep+RPPBu5toCRlaloM56yIWxh6xqfybsQTPNxbAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e40eff7a4ea53f8b59d717b3d07c6709125b7a202e29ce1d9d78fa9fbbb70d33","last_reissued_at":"2026-05-18T00:26:23.718817Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:26:23.718817Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1711.08652","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":"2026-05-18T00:26:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"86AefwE1sXHhGUtRH+CYUCNkLh5IUBqXcZISLs5S9biUvflAeocH+pxjHQsRtw0sV12gslGPFOtwqAoP6lZfAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T02:09:18.076335Z"},"content_sha256":"ad08572e06ee78b35bfff32b19bfda8459849553540bd57fb840b238fe06d2c2","schema_version":"1.0","event_id":"sha256:ad08572e06ee78b35bfff32b19bfda8459849553540bd57fb840b238fe06d2c2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:4QHP66SOUU7YWWOXC6Z5A7DHBE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Star-disk interactions in multi-band photometric monitoring of the classical T Tauri star GI Tau","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Angel Castro, Annapurni Subramaniam, Gang Li, Gregory J. Herczeg, Hubiao Niu, Huifang Xue, Jessy Jose, Jianning Fu, Jinzhong Liu, Konstantin Grankin, Liliana Altamirano, Nahiely Flores-Fajardo, Nikom Prasert, Po-Shih Chiang, Ram Kesh Yadav, Ra\\'ul Michel, Saurabh Sharma, Wen-Ping Chen, Zhen Guo","submitted_at":"2017-11-23T11:19:12Z","abstract_excerpt":"The variability of young stellar objects is mostly driven by star-disk interactions. In long-term photometric monitoring of the accreting T Tauri star GI Tau, we detect extinction events with typical depths of $\\Delta V \\sim 2.5$ mag that last for days-to-months and often appear to occur stochastically. In 2014 - 2015, extinctions that repeated with a quasi-period of 21 days over several months is the first empirical evidence of slow warps predicted from MHD simulations to form at a few stellar radii away from the central star. The reddening is consistent with $R_V=3.85\\pm0.5$ and, along with "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.08652","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":"2026-05-18T00:26:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EdNLLH25Jj8C5zSUROxTHMeIV1Pkx1MwqWKqpBNKr2o1BQ8YeaA+koSS77H3loGEhxdmpV2rEh7I3vabVdb9BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T02:09:18.076805Z"},"content_sha256":"fca77ffc26d450bee99256842c6f8f155683d77dd029f109b15183c4312acf6d","schema_version":"1.0","event_id":"sha256:fca77ffc26d450bee99256842c6f8f155683d77dd029f109b15183c4312acf6d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4QHP66SOUU7YWWOXC6Z5A7DHBE/bundle.json","state_url":"https://pith.science/pith/4QHP66SOUU7YWWOXC6Z5A7DHBE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4QHP66SOUU7YWWOXC6Z5A7DHBE/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":"2026-05-26T02:09:18Z","links":{"resolver":"https://pith.science/pith/4QHP66SOUU7YWWOXC6Z5A7DHBE","bundle":"https://pith.science/pith/4QHP66SOUU7YWWOXC6Z5A7DHBE/bundle.json","state":"https://pith.science/pith/4QHP66SOUU7YWWOXC6Z5A7DHBE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4QHP66SOUU7YWWOXC6Z5A7DHBE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:4QHP66SOUU7YWWOXC6Z5A7DHBE","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":"636f4544fee9aa439be1082e43aad9f2662d6a8782b967da8c5363c9ba6003a8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-11-23T11:19:12Z","title_canon_sha256":"fd3a3026b9b0d80cee92205dbc5986f94a9b3967c320c268f26f830cc823b978"},"schema_version":"1.0","source":{"id":"1711.08652","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.08652","created_at":"2026-05-18T00:26:23Z"},{"alias_kind":"arxiv_version","alias_value":"1711.08652v1","created_at":"2026-05-18T00:26:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.08652","created_at":"2026-05-18T00:26:23Z"},{"alias_kind":"pith_short_12","alias_value":"4QHP66SOUU7Y","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_16","alias_value":"4QHP66SOUU7YWWOX","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_8","alias_value":"4QHP66SO","created_at":"2026-05-18T12:31:00Z"}],"graph_snapshots":[{"event_id":"sha256:fca77ffc26d450bee99256842c6f8f155683d77dd029f109b15183c4312acf6d","target":"graph","created_at":"2026-05-18T00:26:23Z","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":"The variability of young stellar objects is mostly driven by star-disk interactions. In long-term photometric monitoring of the accreting T Tauri star GI Tau, we detect extinction events with typical depths of $\\Delta V \\sim 2.5$ mag that last for days-to-months and often appear to occur stochastically. In 2014 - 2015, extinctions that repeated with a quasi-period of 21 days over several months is the first empirical evidence of slow warps predicted from MHD simulations to form at a few stellar radii away from the central star. The reddening is consistent with $R_V=3.85\\pm0.5$ and, along with ","authors_text":"Angel Castro, Annapurni Subramaniam, Gang Li, Gregory J. Herczeg, Hubiao Niu, Huifang Xue, Jessy Jose, Jianning Fu, Jinzhong Liu, Konstantin Grankin, Liliana Altamirano, Nahiely Flores-Fajardo, Nikom Prasert, Po-Shih Chiang, Ram Kesh Yadav, Ra\\'ul Michel, Saurabh Sharma, Wen-Ping Chen, Zhen Guo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-11-23T11:19:12Z","title":"Star-disk interactions in multi-band photometric monitoring of the classical T Tauri star GI Tau"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.08652","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:ad08572e06ee78b35bfff32b19bfda8459849553540bd57fb840b238fe06d2c2","target":"record","created_at":"2026-05-18T00:26:23Z","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":"636f4544fee9aa439be1082e43aad9f2662d6a8782b967da8c5363c9ba6003a8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-11-23T11:19:12Z","title_canon_sha256":"fd3a3026b9b0d80cee92205dbc5986f94a9b3967c320c268f26f830cc823b978"},"schema_version":"1.0","source":{"id":"1711.08652","kind":"arxiv","version":1}},"canonical_sha256":"e40eff7a4ea53f8b59d717b3d07c6709125b7a202e29ce1d9d78fa9fbbb70d33","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e40eff7a4ea53f8b59d717b3d07c6709125b7a202e29ce1d9d78fa9fbbb70d33","first_computed_at":"2026-05-18T00:26:23.718817Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:26:23.718817Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QPXumuXwqa8JumCSTiSs+9SA8/rMjbosRwdHNpbpC0QdZWep+RPPBu5toCRlaloM56yIWxh6xqfybsQTPNxbAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:26:23.719411Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.08652","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ad08572e06ee78b35bfff32b19bfda8459849553540bd57fb840b238fe06d2c2","sha256:fca77ffc26d450bee99256842c6f8f155683d77dd029f109b15183c4312acf6d"],"state_sha256":"f4d8861b15b58d6f83498ef95914e65e2b53c6f9f548876acad16b7abdc4b861"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NVn2+deRKLBzaoB4AjSfSQKwfzGf+deo40/NPgP8+C5sqZjaWWsl5IWA9RWyUoq18Xkc5OikX21bKO5KcHZTCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T02:09:18.080145Z","bundle_sha256":"9307ca1e04f4e42ae5dbf6a5e061d2d651f8aaf2b0eabd0fa393fb40d755b9f2"}}