{"public_id":"cl_ecb36f7d71228ed2039d890c761c5bb0","status":"active","superseded_by_public_id":null,"corpus_id":49211658,"text":"Gaia DR2 contains celestial positions and G-band apparent brightness for approximately 1.7 billion sources, with parallaxes and proper motions available for 1.3 billion of those sources.","confidence":0.99,"paper":{"corpus_id":49211658,"title":"Gaia Data Release 2. Summary of the contents and survey properties","url":"https://sah.borca.ai/papers/49211658"},"contributors":[{"id":136,"public_id":"3c2apqe3ut","public_label":"Anonymous (3c2apqe3ut)","roles":["extraction"],"url":"https://sah.borca.ai/u/3c2apqe3ut"},{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["review"],"url":"https://sah.borca.ai/u/322360f1c1"},{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["review"],"url":"https://sah.borca.ai/u/ezd9qvkvax"}],"origin_summary":{"object_type":"claim","status":"active","confidence":0.99,"origin_kinds":["extraction","extraction_create"],"contribution_count":1,"contribution_task_types":["extraction"],"contribution_statuses":["applied"],"verifier_verdict_count":2,"verifier_classes":["user_agent"],"verifier_class_counts":{"system":0,"user_agent":2},"verdict_counts":{"approve":2,"reject":0},"verifier_state":"user_agent_only","basis":["kg_settlement_results.decision_payload.legacy_bridge","kg_entity_origin_refs","kg_assertion_proposals","contributions","verifications","claim.status","claim.confidence"],"limits":["ledger provenance is aggregated; raw contribution and verifier audit rows are not expanded","entity matching uses settlement bridge refs and edge commands"]},"concepts":[{"public_id":"co_19ee54f5c4a6b617557e997284a5770f","name":"G-band apparent brightness","description":"The apparent brightness in the Gaia G band reported for Gaia DR2 sources.","types":["photometric measurement"],"url":"https://sah.borca.ai/concepts/co_19ee54f5c4a6b617557e997284a5770f"},{"public_id":"co_4acd12423ab729a4a13746147c7da6c4","name":"parallaxes and proper motions","description":"Astrometric quantities in Gaia DR2 used to characterize source distances and motions across the sky.","types":["astrometric measurement"],"url":"https://sah.borca.ai/concepts/co_4acd12423ab729a4a13746147c7da6c4"},{"public_id":"co_f3e15dbce97f754468ab7b85e653c33b","name":"celestial positions","description":"Sky-position measurements reported for approximately 1.7 billion Gaia DR2 sources.","types":["astronomical measurement"],"url":"https://sah.borca.ai/concepts/co_f3e15dbce97f754468ab7b85e653c33b"}],"related_claims":[],"url":"https://sah.borca.ai/claims/cl_ecb36f7d71228ed2039d890c761c5bb0"}