{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:QR2G57METV2O74ILHDWPWKHD46","short_pith_number":"pith:QR2G57ME","canonical_record":{"source":{"id":"2006.14993","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-06-26T14:02:21Z","cross_cats_sorted":[],"title_canon_sha256":"d43a269ae4e72492ed5a5c38cd118c849e26869b2820b0cc4184da2ab8927a7a","abstract_canon_sha256":"610604ce9005b6c79422497b34304883ea43021e11f11a103ab6a37780b4f53a"},"schema_version":"1.0"},"canonical_sha256":"84746efd849d74eff10b38ecfb28e3e788773566d76b3b06c8e053de7c7c379f","source":{"kind":"arxiv","id":"2006.14993","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2006.14993","created_at":"2026-07-05T01:32:09Z"},{"alias_kind":"arxiv_version","alias_value":"2006.14993v1","created_at":"2026-07-05T01:32:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2006.14993","created_at":"2026-07-05T01:32:09Z"},{"alias_kind":"pith_short_12","alias_value":"QR2G57METV2O","created_at":"2026-07-05T01:32:09Z"},{"alias_kind":"pith_short_16","alias_value":"QR2G57METV2O74IL","created_at":"2026-07-05T01:32:09Z"},{"alias_kind":"pith_short_8","alias_value":"QR2G57ME","created_at":"2026-07-05T01:32:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:QR2G57METV2O74ILHDWPWKHD46","target":"record","payload":{"canonical_record":{"source":{"id":"2006.14993","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-06-26T14:02:21Z","cross_cats_sorted":[],"title_canon_sha256":"d43a269ae4e72492ed5a5c38cd118c849e26869b2820b0cc4184da2ab8927a7a","abstract_canon_sha256":"610604ce9005b6c79422497b34304883ea43021e11f11a103ab6a37780b4f53a"},"schema_version":"1.0"},"canonical_sha256":"84746efd849d74eff10b38ecfb28e3e788773566d76b3b06c8e053de7c7c379f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:32:09.474961Z","signature_b64":"3mpswwZvSVfsw/qW1JbwZSoiv9DQDMNg0yti2ePVewsCyZfHCQmNoEJbVqSnqHspkFijl4guRqkcJqpZwxplBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"84746efd849d74eff10b38ecfb28e3e788773566d76b3b06c8e053de7c7c379f","last_reissued_at":"2026-07-05T01:32:09.474490Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:32:09.474490Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2006.14993","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":"2026-07-05T01:32:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PhqcnvWDj99EYCkw2sufVRId3JWlQ5T+U1UbtGNAWKQHTcpTm5xsN2rgTJmXIwapU33dPyVFGhrGMsZQVGUNDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T13:23:54.627565Z"},"content_sha256":"be49c659179e3d631936a299aface597dbb4f103b0020a1240d7aa4bd5104c63","schema_version":"1.0","event_id":"sha256:be49c659179e3d631936a299aface597dbb4f103b0020a1240d7aa4bd5104c63"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:QR2G57METV2O74ILHDWPWKHD46","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Near-infrared time-series photometry in the field of Cygnus OB2 association II. Mapping the variability of candidate members","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"B. Reipurth, J. Bouvier, J. Roquette, M.G. Guarcello, S. H. P. Alencar","submitted_at":"2020-06-26T14:02:21Z","abstract_excerpt":"We present the results of a J, H, and K photometric variability survey of the central 0.78 square degrees of the young OB association Cygnus OB2. We used data observed with the Wide-Field CAMera at the United Kingdom Infrared Telescope in 2007 (spanning 217 days) to investigate the light curves of 5083 low mass candidate members in the association and explore the occurrence and main characteristics of their near-infrared variability. We identified 2529 stars ($\\sim$50$\\%$ of the sample) with significant variability with time-scales ranging from days to months. We classified the variable stars "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2006.14993","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2006.14993/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":"2026-07-05T01:32:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z8JNoqtzaZIUipskX2m0Rb2lZR9gPb4cxTIDAxfCDMABMP1q8BD++0jroVoV4pQ3F4h+egj9SWrXnaOKbp4TCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T13:23:54.628424Z"},"content_sha256":"5191d5d1cd6a5fba80d71f758eb2c4f5672ef535a03a4b607cb0472b439802e9","schema_version":"1.0","event_id":"sha256:5191d5d1cd6a5fba80d71f758eb2c4f5672ef535a03a4b607cb0472b439802e9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QR2G57METV2O74ILHDWPWKHD46/bundle.json","state_url":"https://pith.science/pith/QR2G57METV2O74ILHDWPWKHD46/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QR2G57METV2O74ILHDWPWKHD46/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":"2026-08-06T13:23:54Z","links":{"resolver":"https://pith.science/pith/QR2G57METV2O74ILHDWPWKHD46","bundle":"https://pith.science/pith/QR2G57METV2O74ILHDWPWKHD46/bundle.json","state":"https://pith.science/pith/QR2G57METV2O74ILHDWPWKHD46/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QR2G57METV2O74ILHDWPWKHD46/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:QR2G57METV2O74ILHDWPWKHD46","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":"610604ce9005b6c79422497b34304883ea43021e11f11a103ab6a37780b4f53a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-06-26T14:02:21Z","title_canon_sha256":"d43a269ae4e72492ed5a5c38cd118c849e26869b2820b0cc4184da2ab8927a7a"},"schema_version":"1.0","source":{"id":"2006.14993","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2006.14993","created_at":"2026-07-05T01:32:09Z"},{"alias_kind":"arxiv_version","alias_value":"2006.14993v1","created_at":"2026-07-05T01:32:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2006.14993","created_at":"2026-07-05T01:32:09Z"},{"alias_kind":"pith_short_12","alias_value":"QR2G57METV2O","created_at":"2026-07-05T01:32:09Z"},{"alias_kind":"pith_short_16","alias_value":"QR2G57METV2O74IL","created_at":"2026-07-05T01:32:09Z"},{"alias_kind":"pith_short_8","alias_value":"QR2G57ME","created_at":"2026-07-05T01:32:09Z"}],"graph_snapshots":[{"event_id":"sha256:5191d5d1cd6a5fba80d71f758eb2c4f5672ef535a03a4b607cb0472b439802e9","target":"graph","created_at":"2026-07-05T01:32:09Z","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/2006.14993/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present the results of a J, H, and K photometric variability survey of the central 0.78 square degrees of the young OB association Cygnus OB2. We used data observed with the Wide-Field CAMera at the United Kingdom Infrared Telescope in 2007 (spanning 217 days) to investigate the light curves of 5083 low mass candidate members in the association and explore the occurrence and main characteristics of their near-infrared variability. We identified 2529 stars ($\\sim$50$\\%$ of the sample) with significant variability with time-scales ranging from days to months. We classified the variable stars ","authors_text":"B. Reipurth, J. Bouvier, J. Roquette, M.G. Guarcello, S. H. P. Alencar","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-06-26T14:02:21Z","title":"Near-infrared time-series photometry in the field of Cygnus OB2 association II. Mapping the variability of candidate members"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2006.14993","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:be49c659179e3d631936a299aface597dbb4f103b0020a1240d7aa4bd5104c63","target":"record","created_at":"2026-07-05T01:32:09Z","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":"610604ce9005b6c79422497b34304883ea43021e11f11a103ab6a37780b4f53a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-06-26T14:02:21Z","title_canon_sha256":"d43a269ae4e72492ed5a5c38cd118c849e26869b2820b0cc4184da2ab8927a7a"},"schema_version":"1.0","source":{"id":"2006.14993","kind":"arxiv","version":1}},"canonical_sha256":"84746efd849d74eff10b38ecfb28e3e788773566d76b3b06c8e053de7c7c379f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"84746efd849d74eff10b38ecfb28e3e788773566d76b3b06c8e053de7c7c379f","first_computed_at":"2026-07-05T01:32:09.474490Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:32:09.474490Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3mpswwZvSVfsw/qW1JbwZSoiv9DQDMNg0yti2ePVewsCyZfHCQmNoEJbVqSnqHspkFijl4guRqkcJqpZwxplBw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:32:09.474961Z","signed_message":"canonical_sha256_bytes"},"source_id":"2006.14993","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:be49c659179e3d631936a299aface597dbb4f103b0020a1240d7aa4bd5104c63","sha256:5191d5d1cd6a5fba80d71f758eb2c4f5672ef535a03a4b607cb0472b439802e9"],"state_sha256":"adef37f9e02184a43b036e7c72bc1062951c16759a3514f82c11f2e8980077bf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yEJkaQI0YrAuag7y9DAZMrMi+BIYo6/mKQ+xJdS6/dsG0z+GeTNWJnosDmevbzXUZfyIe5y6aG7sVvdiOaKcAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T13:23:54.633451Z","bundle_sha256":"f3448aec799a42af1627845dd3544255e1ccab75724739ee9357391cbde2e016"}}