{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:CULLFTBXBUTIBXK3J3II4D7YTS","short_pith_number":"pith:CULLFTBX","canonical_record":{"source":{"id":"1906.08219","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-06-19T16:50:54Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"4717bc290c73e81b6b2a66e3ecf98f368a012efb8413e75d3d4afb97fae193fa","abstract_canon_sha256":"1c941460168be8dfcfa8f131a2fe88a086da246c781ba95a15e4e5530ace0b88"},"schema_version":"1.0"},"canonical_sha256":"1516b2cc370d2680dd5b4ed08e0ff89cac4a2860c14843407e06badedb62f991","source":{"kind":"arxiv","id":"1906.08219","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.08219","created_at":"2026-07-05T00:06:46Z"},{"alias_kind":"arxiv_version","alias_value":"1906.08219v2","created_at":"2026-07-05T00:06:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.08219","created_at":"2026-07-05T00:06:46Z"},{"alias_kind":"pith_short_12","alias_value":"CULLFTBXBUTI","created_at":"2026-07-05T00:06:46Z"},{"alias_kind":"pith_short_16","alias_value":"CULLFTBXBUTIBXK3","created_at":"2026-07-05T00:06:46Z"},{"alias_kind":"pith_short_8","alias_value":"CULLFTBX","created_at":"2026-07-05T00:06:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:CULLFTBXBUTIBXK3J3II4D7YTS","target":"record","payload":{"canonical_record":{"source":{"id":"1906.08219","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-06-19T16:50:54Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"4717bc290c73e81b6b2a66e3ecf98f368a012efb8413e75d3d4afb97fae193fa","abstract_canon_sha256":"1c941460168be8dfcfa8f131a2fe88a086da246c781ba95a15e4e5530ace0b88"},"schema_version":"1.0"},"canonical_sha256":"1516b2cc370d2680dd5b4ed08e0ff89cac4a2860c14843407e06badedb62f991","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:06:46.561093Z","signature_b64":"w6vps7acjNdzQsbuhnvyNnADvw8oDNfhmMPvClvJ9V/w710lQk4ID7GGB4BQU0bYY83qEO8cRTwBHoDwq/wMBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1516b2cc370d2680dd5b4ed08e0ff89cac4a2860c14843407e06badedb62f991","last_reissued_at":"2026-07-05T00:06:46.560485Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:06:46.560485Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.08219","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":"2026-07-05T00:06:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BWnGkvKDcrXV88Ym/T+NKn9YYo9hTkG4i7bes72YIWZ4kbZLBYdlzIiJ5Ys8qsqJ8xrhFgpJKLc3Mx/IiDgpDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T06:48:55.832034Z"},"content_sha256":"a248a2a8b9b23b9e72f3f836500e75c97e11330d2000834dcd1490383aacdfcf","schema_version":"1.0","event_id":"sha256:a248a2a8b9b23b9e72f3f836500e75c97e11330d2000834dcd1490383aacdfcf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:CULLFTBXBUTIBXK3J3II4D7YTS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"NGTS-7Ab: An ultra-short period brown dwarf transiting a tidally-locked and active M dwarf","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.SR","authors_text":"Alexander Chaushev, Alexis M. S. Smith, Anders Erikson, Boris T. G\\\"ansicke, Christopher A. Watson, Claudia Belardi, Dan Bayliss, David R. Anderson, Didier Queloz, Don Pollacco, Edward Gillen, Edward M. Bryant, Fran\\c{c}ois Bouchy, Heike Rauer, Ian P. Braker, James A. G. Jackman, James McCormac, James S. Jenkins, Jean C. Costes, Jose I. Vines, Joshua T. Briegal, Juan Cabrera, Katja Poppenhaeger, Liam Raynard, Louise D. Nielsen, Matthew R. Burleigh, Maximilian N. G\\\"unther, Maximiliano Moyano, Michael R. Goad, Oliver Turner, Peter J. Wheatley, Philipp Eigm\\\"uller, Richard G. West, Samuel Gill, Sarah L. Casewell, Simon T. Hodgkin, St\\'ephane Udry, Szilard Csizmadia, Tom Louden","submitted_at":"2019-06-19T16:50:54Z","abstract_excerpt":"We present the discovery of NGTS-7Ab, a high mass brown dwarf transiting an M dwarf with a period of 16.2 hours, discovered as part of the Next Generation Transit Survey (NGTS). This is the shortest period transiting brown dwarf around a main or pre-main sequence star to date. The M star host (NGTS-7A) has an age of roughly 55 Myr and is in a state of spin-orbit synchronisation, which we attribute to tidal interaction with the brown dwarf acting to spin up the star. The host star is magnetically active and shows multiple flares across the NGTS and follow up lightcurves, which we use to probe t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.08219","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/1906.08219/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":"2026-07-05T00:06:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Hes+rzcyOCZ7XmcQLcesY3OqeZ4TzKnsCmY9oXCAdaPjJURN23mZfut3P83438dGtKuPZ6Z3yvMza7tbk3hBCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T06:48:55.832434Z"},"content_sha256":"c6cb6e6568247e6a1904ce3fff6bf498f19189e0c08a44b1bdfee822853c9dc1","schema_version":"1.0","event_id":"sha256:c6cb6e6568247e6a1904ce3fff6bf498f19189e0c08a44b1bdfee822853c9dc1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CULLFTBXBUTIBXK3J3II4D7YTS/bundle.json","state_url":"https://pith.science/pith/CULLFTBXBUTIBXK3J3II4D7YTS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CULLFTBXBUTIBXK3J3II4D7YTS/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":"2026-07-07T06:48:55Z","links":{"resolver":"https://pith.science/pith/CULLFTBXBUTIBXK3J3II4D7YTS","bundle":"https://pith.science/pith/CULLFTBXBUTIBXK3J3II4D7YTS/bundle.json","state":"https://pith.science/pith/CULLFTBXBUTIBXK3J3II4D7YTS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CULLFTBXBUTIBXK3J3II4D7YTS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:CULLFTBXBUTIBXK3J3II4D7YTS","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":"1c941460168be8dfcfa8f131a2fe88a086da246c781ba95a15e4e5530ace0b88","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-06-19T16:50:54Z","title_canon_sha256":"4717bc290c73e81b6b2a66e3ecf98f368a012efb8413e75d3d4afb97fae193fa"},"schema_version":"1.0","source":{"id":"1906.08219","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.08219","created_at":"2026-07-05T00:06:46Z"},{"alias_kind":"arxiv_version","alias_value":"1906.08219v2","created_at":"2026-07-05T00:06:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.08219","created_at":"2026-07-05T00:06:46Z"},{"alias_kind":"pith_short_12","alias_value":"CULLFTBXBUTI","created_at":"2026-07-05T00:06:46Z"},{"alias_kind":"pith_short_16","alias_value":"CULLFTBXBUTIBXK3","created_at":"2026-07-05T00:06:46Z"},{"alias_kind":"pith_short_8","alias_value":"CULLFTBX","created_at":"2026-07-05T00:06:46Z"}],"graph_snapshots":[{"event_id":"sha256:c6cb6e6568247e6a1904ce3fff6bf498f19189e0c08a44b1bdfee822853c9dc1","target":"graph","created_at":"2026-07-05T00:06:46Z","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/1906.08219/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present the discovery of NGTS-7Ab, a high mass brown dwarf transiting an M dwarf with a period of 16.2 hours, discovered as part of the Next Generation Transit Survey (NGTS). This is the shortest period transiting brown dwarf around a main or pre-main sequence star to date. The M star host (NGTS-7A) has an age of roughly 55 Myr and is in a state of spin-orbit synchronisation, which we attribute to tidal interaction with the brown dwarf acting to spin up the star. The host star is magnetically active and shows multiple flares across the NGTS and follow up lightcurves, which we use to probe t","authors_text":"Alexander Chaushev, Alexis M. S. Smith, Anders Erikson, Boris T. G\\\"ansicke, Christopher A. Watson, Claudia Belardi, Dan Bayliss, David R. Anderson, Didier Queloz, Don Pollacco, Edward Gillen, Edward M. Bryant, Fran\\c{c}ois Bouchy, Heike Rauer, Ian P. Braker, James A. G. Jackman, James McCormac, James S. Jenkins, Jean C. Costes, Jose I. Vines, Joshua T. Briegal, Juan Cabrera, Katja Poppenhaeger, Liam Raynard, Louise D. Nielsen, Matthew R. Burleigh, Maximilian N. G\\\"unther, Maximiliano Moyano, Michael R. Goad, Oliver Turner, Peter J. Wheatley, Philipp Eigm\\\"uller, Richard G. West, Samuel Gill, Sarah L. Casewell, Simon T. Hodgkin, St\\'ephane Udry, Szilard Csizmadia, Tom Louden","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-06-19T16:50:54Z","title":"NGTS-7Ab: An ultra-short period brown dwarf transiting a tidally-locked and active M dwarf"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.08219","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:a248a2a8b9b23b9e72f3f836500e75c97e11330d2000834dcd1490383aacdfcf","target":"record","created_at":"2026-07-05T00:06:46Z","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":"1c941460168be8dfcfa8f131a2fe88a086da246c781ba95a15e4e5530ace0b88","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-06-19T16:50:54Z","title_canon_sha256":"4717bc290c73e81b6b2a66e3ecf98f368a012efb8413e75d3d4afb97fae193fa"},"schema_version":"1.0","source":{"id":"1906.08219","kind":"arxiv","version":2}},"canonical_sha256":"1516b2cc370d2680dd5b4ed08e0ff89cac4a2860c14843407e06badedb62f991","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1516b2cc370d2680dd5b4ed08e0ff89cac4a2860c14843407e06badedb62f991","first_computed_at":"2026-07-05T00:06:46.560485Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:06:46.560485Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"w6vps7acjNdzQsbuhnvyNnADvw8oDNfhmMPvClvJ9V/w710lQk4ID7GGB4BQU0bYY83qEO8cRTwBHoDwq/wMBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:06:46.561093Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.08219","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a248a2a8b9b23b9e72f3f836500e75c97e11330d2000834dcd1490383aacdfcf","sha256:c6cb6e6568247e6a1904ce3fff6bf498f19189e0c08a44b1bdfee822853c9dc1"],"state_sha256":"3e4099dd34a885ea44eebdbed77bcb42646845589c739772f77b07bc937576d9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7VDCyiZKPqGxlTgw1hHXYHo0r2zDFSTO0k+3xmS0E39cc3M0ecEmYZlgtxlV3QU0uwuE1MV/Ezp7xWYItzbCCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T06:48:55.834758Z","bundle_sha256":"ed6ead2e5c2152ff13a821ef6b05ee2fbd626ae489541dadda15fdfe2f534ab8"}}