{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:JNR64JYJ4DE4CWH6KEEHWJJKJR","short_pith_number":"pith:JNR64JYJ","canonical_record":{"source":{"id":"1605.03583","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-05-11T20:00:02Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"bd682c5b37bca30da93cd5853567bda69ec6c892b3077536a7fe1cfc1f584a81","abstract_canon_sha256":"71b7d03e039c4069babc2ffe577b1cf1a22f79d55b1150f424b29b44f719bb7c"},"schema_version":"1.0"},"canonical_sha256":"4b63ee2709e0c9c158fe51087b252a4c7d1f93ea11cb169e85cb9f7d474f346d","source":{"kind":"arxiv","id":"1605.03583","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.03583","created_at":"2026-05-18T01:10:29Z"},{"alias_kind":"arxiv_version","alias_value":"1605.03583v1","created_at":"2026-05-18T01:10:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.03583","created_at":"2026-05-18T01:10:29Z"},{"alias_kind":"pith_short_12","alias_value":"JNR64JYJ4DE4","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"JNR64JYJ4DE4CWH6","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"JNR64JYJ","created_at":"2026-05-18T12:30:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:JNR64JYJ4DE4CWH6KEEHWJJKJR","target":"record","payload":{"canonical_record":{"source":{"id":"1605.03583","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-05-11T20:00:02Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"bd682c5b37bca30da93cd5853567bda69ec6c892b3077536a7fe1cfc1f584a81","abstract_canon_sha256":"71b7d03e039c4069babc2ffe577b1cf1a22f79d55b1150f424b29b44f719bb7c"},"schema_version":"1.0"},"canonical_sha256":"4b63ee2709e0c9c158fe51087b252a4c7d1f93ea11cb169e85cb9f7d474f346d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:10:29.853384Z","signature_b64":"0XQndfsZPgZlaBVuTxY5Hf0l1deU8ao+oZ+hdcWFqADZ1VvNYRdX4NlZvgtLu4OtmmaujthibzRxEIrdDEIUCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4b63ee2709e0c9c158fe51087b252a4c7d1f93ea11cb169e85cb9f7d474f346d","last_reissued_at":"2026-05-18T01:10:29.852745Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:10:29.852745Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1605.03583","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":"2026-05-18T01:10:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jfQz52vyW4doBwu/50vn/PVkSA5prUP+Ga3L5PRHBtHkQ7n9RZdSq0w31s4R/P4cf6JLDO/PiS4/emiHmBFCAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T03:32:35.649513Z"},"content_sha256":"36d1110a7b1b03544b8769efd8b01ee3eb25f8a7cab1488c7f7162f6fa50d1f7","schema_version":"1.0","event_id":"sha256:36d1110a7b1b03544b8769efd8b01ee3eb25f8a7cab1488c7f7162f6fa50d1f7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:JNR64JYJ4DE4CWH6KEEHWJJKJR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cygnus OB2 DANCe: A high precision proper motion study of the Cygnus OB2 association","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"David Barrado, Emmanuel Bertin, Herve Bouy, Janet E. Drew, Jean-Charles Cuillandre, Luis Manuel Sarro, Nicholas J. Wright","submitted_at":"2016-05-11T20:00:02Z","abstract_excerpt":"We present a high-precision proper motion study of 873 X-ray and spectroscopically selected stars in the massive OB association Cygnus OB2 as part of the DANCe project. These were calculated from images spanning a 15 year baseline and have typical precisions < 1 mas/yr. We calculate the velocity dispersion in the two axes to be $\\sigma_\\alpha(c) = 13.0^{+0.8}_{-0.7}$ and $\\sigma_\\delta(c) = 9.1^{+0.5}_{-0.5}$ km/s, using a 2-component, 2-dimensional model that takes into account the uncertainties on the measurements. This gives a 3-dimensional velocity dispersion of $\\sigma_{3D} = 17.8 \\pm 0.6"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.03583","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":"2026-05-18T01:10:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nN3ALIdgZMYydE20yp5osUYmIS59WIyBQ0jmy6gNrZHHcAeabVxBY+gPyBZL5Yp874pT0KDWMmYyuEx7U9/WAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T03:32:35.650196Z"},"content_sha256":"66658cddb835d0541ab38a9734e1e229e946782b9eb5d3124626719de6893de7","schema_version":"1.0","event_id":"sha256:66658cddb835d0541ab38a9734e1e229e946782b9eb5d3124626719de6893de7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JNR64JYJ4DE4CWH6KEEHWJJKJR/bundle.json","state_url":"https://pith.science/pith/JNR64JYJ4DE4CWH6KEEHWJJKJR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JNR64JYJ4DE4CWH6KEEHWJJKJR/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":"2026-06-11T03:32:35Z","links":{"resolver":"https://pith.science/pith/JNR64JYJ4DE4CWH6KEEHWJJKJR","bundle":"https://pith.science/pith/JNR64JYJ4DE4CWH6KEEHWJJKJR/bundle.json","state":"https://pith.science/pith/JNR64JYJ4DE4CWH6KEEHWJJKJR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JNR64JYJ4DE4CWH6KEEHWJJKJR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:JNR64JYJ4DE4CWH6KEEHWJJKJR","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":"71b7d03e039c4069babc2ffe577b1cf1a22f79d55b1150f424b29b44f719bb7c","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-05-11T20:00:02Z","title_canon_sha256":"bd682c5b37bca30da93cd5853567bda69ec6c892b3077536a7fe1cfc1f584a81"},"schema_version":"1.0","source":{"id":"1605.03583","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.03583","created_at":"2026-05-18T01:10:29Z"},{"alias_kind":"arxiv_version","alias_value":"1605.03583v1","created_at":"2026-05-18T01:10:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.03583","created_at":"2026-05-18T01:10:29Z"},{"alias_kind":"pith_short_12","alias_value":"JNR64JYJ4DE4","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"JNR64JYJ4DE4CWH6","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"JNR64JYJ","created_at":"2026-05-18T12:30:25Z"}],"graph_snapshots":[{"event_id":"sha256:66658cddb835d0541ab38a9734e1e229e946782b9eb5d3124626719de6893de7","target":"graph","created_at":"2026-05-18T01:10:29Z","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 present a high-precision proper motion study of 873 X-ray and spectroscopically selected stars in the massive OB association Cygnus OB2 as part of the DANCe project. These were calculated from images spanning a 15 year baseline and have typical precisions < 1 mas/yr. We calculate the velocity dispersion in the two axes to be $\\sigma_\\alpha(c) = 13.0^{+0.8}_{-0.7}$ and $\\sigma_\\delta(c) = 9.1^{+0.5}_{-0.5}$ km/s, using a 2-component, 2-dimensional model that takes into account the uncertainties on the measurements. This gives a 3-dimensional velocity dispersion of $\\sigma_{3D} = 17.8 \\pm 0.6","authors_text":"David Barrado, Emmanuel Bertin, Herve Bouy, Janet E. Drew, Jean-Charles Cuillandre, Luis Manuel Sarro, Nicholas J. Wright","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-05-11T20:00:02Z","title":"Cygnus OB2 DANCe: A high precision proper motion study of the Cygnus OB2 association"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.03583","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":"sha256:36d1110a7b1b03544b8769efd8b01ee3eb25f8a7cab1488c7f7162f6fa50d1f7","target":"record","created_at":"2026-05-18T01:10:29Z","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":"71b7d03e039c4069babc2ffe577b1cf1a22f79d55b1150f424b29b44f719bb7c","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-05-11T20:00:02Z","title_canon_sha256":"bd682c5b37bca30da93cd5853567bda69ec6c892b3077536a7fe1cfc1f584a81"},"schema_version":"1.0","source":{"id":"1605.03583","kind":"arxiv","version":1}},"canonical_sha256":"4b63ee2709e0c9c158fe51087b252a4c7d1f93ea11cb169e85cb9f7d474f346d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4b63ee2709e0c9c158fe51087b252a4c7d1f93ea11cb169e85cb9f7d474f346d","first_computed_at":"2026-05-18T01:10:29.852745Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:10:29.852745Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0XQndfsZPgZlaBVuTxY5Hf0l1deU8ao+oZ+hdcWFqADZ1VvNYRdX4NlZvgtLu4OtmmaujthibzRxEIrdDEIUCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:10:29.853384Z","signed_message":"canonical_sha256_bytes"},"source_id":"1605.03583","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:36d1110a7b1b03544b8769efd8b01ee3eb25f8a7cab1488c7f7162f6fa50d1f7","sha256:66658cddb835d0541ab38a9734e1e229e946782b9eb5d3124626719de6893de7"],"state_sha256":"f06863784e1c899e9a61083c3b05492c1cd13b5d741a01fcb9cdf1bc509980e9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FeQ54UC9+LOa+SNo5LaOWuQ04/5XKtKpkqIuKchRB4NgxnEqf/M7ZpQdsSKxUpTZHbUMcy70/I5262y086qKCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T03:32:35.653159Z","bundle_sha256":"dfbad4c07846763dc8f0cba345c8591f1bfd4cdc0ae57fba1723d4afcd00d630"}}