{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:VNARBIOHYSYQDS274IZGNUD6GI","short_pith_number":"pith:VNARBIOH","canonical_record":{"source":{"id":"2207.08587","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2022-07-18T13:26:38Z","cross_cats_sorted":[],"title_canon_sha256":"fd99d5ecd775ce5d44d8e0a02479c3dcb5ee185ec4ec7eb4f97bfcff3ee46582","abstract_canon_sha256":"f0f2c72c862f4f9cc674e2a641636a73a262c2c986cefbbabd759e4ac336e19a"},"schema_version":"1.0"},"canonical_sha256":"ab4110a1c7c4b101cb5fe23266d07e3235426cefd16f829109bae383f49e10f2","source":{"kind":"arxiv","id":"2207.08587","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2207.08587","created_at":"2026-07-05T04:44:46Z"},{"alias_kind":"arxiv_version","alias_value":"2207.08587v2","created_at":"2026-07-05T04:44:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2207.08587","created_at":"2026-07-05T04:44:46Z"},{"alias_kind":"pith_short_12","alias_value":"VNARBIOHYSYQ","created_at":"2026-07-05T04:44:46Z"},{"alias_kind":"pith_short_16","alias_value":"VNARBIOHYSYQDS27","created_at":"2026-07-05T04:44:46Z"},{"alias_kind":"pith_short_8","alias_value":"VNARBIOH","created_at":"2026-07-05T04:44:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:VNARBIOHYSYQDS274IZGNUD6GI","target":"record","payload":{"canonical_record":{"source":{"id":"2207.08587","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2022-07-18T13:26:38Z","cross_cats_sorted":[],"title_canon_sha256":"fd99d5ecd775ce5d44d8e0a02479c3dcb5ee185ec4ec7eb4f97bfcff3ee46582","abstract_canon_sha256":"f0f2c72c862f4f9cc674e2a641636a73a262c2c986cefbbabd759e4ac336e19a"},"schema_version":"1.0"},"canonical_sha256":"ab4110a1c7c4b101cb5fe23266d07e3235426cefd16f829109bae383f49e10f2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:44:46.001240Z","signature_b64":"WXu38rvnArrlJp3evV+iDawpBGfXvCuYXJPWW+L7Ij7vftmcARUhjM+/mnh4pUehXHnQQXGGml4uhWbIvgu4Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ab4110a1c7c4b101cb5fe23266d07e3235426cefd16f829109bae383f49e10f2","last_reissued_at":"2026-07-05T04:44:46.000756Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:44:46.000756Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2207.08587","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T04:44:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ySPNHeff0QTTGEvkY2jbwzOlusEKEyMo6Z7LmFQ09xqrp4iQ8zmYLd9dw0PWAOgD0g1/+j0OD4+yUAOu5NWtDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T05:42:53.813407Z"},"content_sha256":"ec131e3a3db01871031f115c065fa0da1063a5944f417b15555904ddf43e8467","schema_version":"1.0","event_id":"sha256:ec131e3a3db01871031f115c065fa0da1063a5944f417b15555904ddf43e8467"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:VNARBIOHYSYQDS274IZGNUD6GI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"External or internal companion exciting the spiral arms in CQ Tau?","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Christophe Pinte, Claudia Toci, Daniel J. Price, Davide Fedele, Giuseppe Lodato, Iain Hammond, Jennifer Baird, Josh Calcino, Leonardo Testi, Maria Giulia Ubeira-Gabellini, Myriam Benisty, Valentin Christiaens","submitted_at":"2022-07-18T13:26:38Z","abstract_excerpt":"We present new high-contrast images in near-infrared wavelengths ($\\lambda$ = 1.04, 1.24, 1.62, 2.18 and 3.78$\\mu$m) of the young variable star CQ Tau, aiming to constrain the presence of companions in the protoplanetary disc. We reached a Ks-band contrast of 14 magnitudes with SPHERE/IRDIS at separations greater than 0.\"4 from the star. Our mass sensitivity curve rules out giant planets above 4 M$_{\\rm Jup}$ immediately outside the spiral arms at $\\sim$60 au and above 2-3 M$_{\\rm Jup}$ beyond 100 au to 5$\\sigma$ confidence assuming hot-start models. We do, however, detect four spiral arms, a "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2207.08587","kind":"arxiv","version":2},"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/2207.08587/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":"2026-07-05T04:44:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Bk+tViiBKixWe6PMqpbB/9TtnU2mNPuX0K1gnaMZvdZYNMfrIj+dFYaP7/ncxjt3ww3MdApcKLFPTDFbaL+kAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T05:42:53.813930Z"},"content_sha256":"a6edf1be32a984c81e56fbcfa6d03539384c37fa28a24a2131b872f1a4821666","schema_version":"1.0","event_id":"sha256:a6edf1be32a984c81e56fbcfa6d03539384c37fa28a24a2131b872f1a4821666"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VNARBIOHYSYQDS274IZGNUD6GI/bundle.json","state_url":"https://pith.science/pith/VNARBIOHYSYQDS274IZGNUD6GI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VNARBIOHYSYQDS274IZGNUD6GI/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":"2026-08-18T05:42:53Z","links":{"resolver":"https://pith.science/pith/VNARBIOHYSYQDS274IZGNUD6GI","bundle":"https://pith.science/pith/VNARBIOHYSYQDS274IZGNUD6GI/bundle.json","state":"https://pith.science/pith/VNARBIOHYSYQDS274IZGNUD6GI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VNARBIOHYSYQDS274IZGNUD6GI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:VNARBIOHYSYQDS274IZGNUD6GI","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":"f0f2c72c862f4f9cc674e2a641636a73a262c2c986cefbbabd759e4ac336e19a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2022-07-18T13:26:38Z","title_canon_sha256":"fd99d5ecd775ce5d44d8e0a02479c3dcb5ee185ec4ec7eb4f97bfcff3ee46582"},"schema_version":"1.0","source":{"id":"2207.08587","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2207.08587","created_at":"2026-07-05T04:44:46Z"},{"alias_kind":"arxiv_version","alias_value":"2207.08587v2","created_at":"2026-07-05T04:44:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2207.08587","created_at":"2026-07-05T04:44:46Z"},{"alias_kind":"pith_short_12","alias_value":"VNARBIOHYSYQ","created_at":"2026-07-05T04:44:46Z"},{"alias_kind":"pith_short_16","alias_value":"VNARBIOHYSYQDS27","created_at":"2026-07-05T04:44:46Z"},{"alias_kind":"pith_short_8","alias_value":"VNARBIOH","created_at":"2026-07-05T04:44:46Z"}],"graph_snapshots":[{"event_id":"sha256:a6edf1be32a984c81e56fbcfa6d03539384c37fa28a24a2131b872f1a4821666","target":"graph","created_at":"2026-07-05T04:44:46Z","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/2207.08587/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present new high-contrast images in near-infrared wavelengths ($\\lambda$ = 1.04, 1.24, 1.62, 2.18 and 3.78$\\mu$m) of the young variable star CQ Tau, aiming to constrain the presence of companions in the protoplanetary disc. We reached a Ks-band contrast of 14 magnitudes with SPHERE/IRDIS at separations greater than 0.\"4 from the star. Our mass sensitivity curve rules out giant planets above 4 M$_{\\rm Jup}$ immediately outside the spiral arms at $\\sim$60 au and above 2-3 M$_{\\rm Jup}$ beyond 100 au to 5$\\sigma$ confidence assuming hot-start models. We do, however, detect four spiral arms, a ","authors_text":"Christophe Pinte, Claudia Toci, Daniel J. Price, Davide Fedele, Giuseppe Lodato, Iain Hammond, Jennifer Baird, Josh Calcino, Leonardo Testi, Maria Giulia Ubeira-Gabellini, Myriam Benisty, Valentin Christiaens","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2022-07-18T13:26:38Z","title":"External or internal companion exciting the spiral arms in CQ Tau?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2207.08587","kind":"arxiv","version":2},"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:ec131e3a3db01871031f115c065fa0da1063a5944f417b15555904ddf43e8467","target":"record","created_at":"2026-07-05T04:44:46Z","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":"f0f2c72c862f4f9cc674e2a641636a73a262c2c986cefbbabd759e4ac336e19a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2022-07-18T13:26:38Z","title_canon_sha256":"fd99d5ecd775ce5d44d8e0a02479c3dcb5ee185ec4ec7eb4f97bfcff3ee46582"},"schema_version":"1.0","source":{"id":"2207.08587","kind":"arxiv","version":2}},"canonical_sha256":"ab4110a1c7c4b101cb5fe23266d07e3235426cefd16f829109bae383f49e10f2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ab4110a1c7c4b101cb5fe23266d07e3235426cefd16f829109bae383f49e10f2","first_computed_at":"2026-07-05T04:44:46.000756Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:44:46.000756Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WXu38rvnArrlJp3evV+iDawpBGfXvCuYXJPWW+L7Ij7vftmcARUhjM+/mnh4pUehXHnQQXGGml4uhWbIvgu4Bw==","signature_status":"signed_v1","signed_at":"2026-07-05T04:44:46.001240Z","signed_message":"canonical_sha256_bytes"},"source_id":"2207.08587","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ec131e3a3db01871031f115c065fa0da1063a5944f417b15555904ddf43e8467","sha256:a6edf1be32a984c81e56fbcfa6d03539384c37fa28a24a2131b872f1a4821666"],"state_sha256":"5020f5856bcf0531f2236280eabffda66935e42b4d0d5c8b1070510888771b91"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZcWxP1RgwvQoHZsrkUWNxhXDyqvx5tCcCBuXC7lsZFd3eu1oi7WQ/PZthND8kZ/aMojXlhbceVqLS7UkFHW7CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T05:42:53.819235Z","bundle_sha256":"25a2f0753f5742859d006d920cfd6213a12ac65036f6a8458e5da03d5c1a5847"}}