{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:IR4UMLILZ6OBXV77QUOOFEO5IP","short_pith_number":"pith:IR4UMLIL","canonical_record":{"source":{"id":"1505.01495","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-05-06T20:01:34Z","cross_cats_sorted":[],"title_canon_sha256":"cb030d0cef297ca63231f01765af0300aab8a5058b82175c0748537aa0c38328","abstract_canon_sha256":"4a2dac1192b177a1ae9bd5d76b586b928647af362e47c6b0a4d13caee4ee90da"},"schema_version":"1.0"},"canonical_sha256":"4479462d0bcf9c1bd7ff851ce291dd43dd7663eee639355bc58cf7b2b19b7a89","source":{"kind":"arxiv","id":"1505.01495","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.01495","created_at":"2026-05-18T01:30:24Z"},{"alias_kind":"arxiv_version","alias_value":"1505.01495v2","created_at":"2026-05-18T01:30:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.01495","created_at":"2026-05-18T01:30:24Z"},{"alias_kind":"pith_short_12","alias_value":"IR4UMLILZ6OB","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"IR4UMLILZ6OBXV77","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"IR4UMLIL","created_at":"2026-05-18T12:29:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:IR4UMLILZ6OBXV77QUOOFEO5IP","target":"record","payload":{"canonical_record":{"source":{"id":"1505.01495","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-05-06T20:01:34Z","cross_cats_sorted":[],"title_canon_sha256":"cb030d0cef297ca63231f01765af0300aab8a5058b82175c0748537aa0c38328","abstract_canon_sha256":"4a2dac1192b177a1ae9bd5d76b586b928647af362e47c6b0a4d13caee4ee90da"},"schema_version":"1.0"},"canonical_sha256":"4479462d0bcf9c1bd7ff851ce291dd43dd7663eee639355bc58cf7b2b19b7a89","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:30:24.536149Z","signature_b64":"iIJuSFcPGJZDxchtkkCtX8OCrX423zvRSNVY3xMqeWnPYaYnNYAijG9TagFwdDoFvcq6HaafvepA7gsDeOlOBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4479462d0bcf9c1bd7ff851ce291dd43dd7663eee639355bc58cf7b2b19b7a89","last_reissued_at":"2026-05-18T01:30:24.535342Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:30:24.535342Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1505.01495","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":"2026-05-18T01:30:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SR2LYkJlSMjLpc2kPpEQs6vCP0L72MurFCQW/o2r3GHcmw94qYzJIhNgF+5vyAUs13p2bY4+aA5nplawNpJrBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T20:49:05.359879Z"},"content_sha256":"ed4f6d506cb813625507af75f056132ff01b6df3288f11f0ec008bb46b93789e","schema_version":"1.0","event_id":"sha256:ed4f6d506cb813625507af75f056132ff01b6df3288f11f0ec008bb46b93789e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:IR4UMLILZ6OBXV77QUOOFEO5IP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Near-Infrared Variability in the Orion Nebula Cluster","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Bo Reipurth, Luiz Paulo Vaz, N. J. G. Cross, Scott J. Wolk, Thomas S. Rice","submitted_at":"2015-05-06T20:01:34Z","abstract_excerpt":"Using the United Kingdom Infrared Telescope on Mauna Kea, we have carried out a new near-infrared J, H, K monitoring survey of almost a square degree of the star-forming Orion Nebula Cluster with observations on 120 nights over three observing seasons, spanning a total of 894 days. We monitored ~15,000 stars down to J=20 using the WFCAM instrument, and have extracted 1203 significantly variable stars from our data. By studying variability in young stellar objects (YSOs) in the H-K, K color-magnitude diagram, we are able to distinguish between physical mechanisms of variability. Many variables "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.01495","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":""},"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":"2026-05-18T01:30:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VDVA3VDXDrsoJeuco3rliMFMj+AMkYUiIQecgAvKJKiD2TKZAE1SoW4k7qBMRfRjby+61gi3ofBsnxI4zdnPCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T20:49:05.360442Z"},"content_sha256":"77445ce3b95505c88ba3f2e30b20edf0e4cee37c4587a98fd1296a30397a6f3e","schema_version":"1.0","event_id":"sha256:77445ce3b95505c88ba3f2e30b20edf0e4cee37c4587a98fd1296a30397a6f3e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IR4UMLILZ6OBXV77QUOOFEO5IP/bundle.json","state_url":"https://pith.science/pith/IR4UMLILZ6OBXV77QUOOFEO5IP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IR4UMLILZ6OBXV77QUOOFEO5IP/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":"2026-07-04T20:49:05Z","links":{"resolver":"https://pith.science/pith/IR4UMLILZ6OBXV77QUOOFEO5IP","bundle":"https://pith.science/pith/IR4UMLILZ6OBXV77QUOOFEO5IP/bundle.json","state":"https://pith.science/pith/IR4UMLILZ6OBXV77QUOOFEO5IP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IR4UMLILZ6OBXV77QUOOFEO5IP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:IR4UMLILZ6OBXV77QUOOFEO5IP","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":"4a2dac1192b177a1ae9bd5d76b586b928647af362e47c6b0a4d13caee4ee90da","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-05-06T20:01:34Z","title_canon_sha256":"cb030d0cef297ca63231f01765af0300aab8a5058b82175c0748537aa0c38328"},"schema_version":"1.0","source":{"id":"1505.01495","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.01495","created_at":"2026-05-18T01:30:24Z"},{"alias_kind":"arxiv_version","alias_value":"1505.01495v2","created_at":"2026-05-18T01:30:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.01495","created_at":"2026-05-18T01:30:24Z"},{"alias_kind":"pith_short_12","alias_value":"IR4UMLILZ6OB","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"IR4UMLILZ6OBXV77","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"IR4UMLIL","created_at":"2026-05-18T12:29:25Z"}],"graph_snapshots":[{"event_id":"sha256:77445ce3b95505c88ba3f2e30b20edf0e4cee37c4587a98fd1296a30397a6f3e","target":"graph","created_at":"2026-05-18T01:30:24Z","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":"Using the United Kingdom Infrared Telescope on Mauna Kea, we have carried out a new near-infrared J, H, K monitoring survey of almost a square degree of the star-forming Orion Nebula Cluster with observations on 120 nights over three observing seasons, spanning a total of 894 days. We monitored ~15,000 stars down to J=20 using the WFCAM instrument, and have extracted 1203 significantly variable stars from our data. By studying variability in young stellar objects (YSOs) in the H-K, K color-magnitude diagram, we are able to distinguish between physical mechanisms of variability. Many variables ","authors_text":"Bo Reipurth, Luiz Paulo Vaz, N. J. G. Cross, Scott J. Wolk, Thomas S. Rice","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-05-06T20:01:34Z","title":"Near-Infrared Variability in the Orion Nebula Cluster"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.01495","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:ed4f6d506cb813625507af75f056132ff01b6df3288f11f0ec008bb46b93789e","target":"record","created_at":"2026-05-18T01:30:24Z","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":"4a2dac1192b177a1ae9bd5d76b586b928647af362e47c6b0a4d13caee4ee90da","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-05-06T20:01:34Z","title_canon_sha256":"cb030d0cef297ca63231f01765af0300aab8a5058b82175c0748537aa0c38328"},"schema_version":"1.0","source":{"id":"1505.01495","kind":"arxiv","version":2}},"canonical_sha256":"4479462d0bcf9c1bd7ff851ce291dd43dd7663eee639355bc58cf7b2b19b7a89","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4479462d0bcf9c1bd7ff851ce291dd43dd7663eee639355bc58cf7b2b19b7a89","first_computed_at":"2026-05-18T01:30:24.535342Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:30:24.535342Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iIJuSFcPGJZDxchtkkCtX8OCrX423zvRSNVY3xMqeWnPYaYnNYAijG9TagFwdDoFvcq6HaafvepA7gsDeOlOBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:30:24.536149Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.01495","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ed4f6d506cb813625507af75f056132ff01b6df3288f11f0ec008bb46b93789e","sha256:77445ce3b95505c88ba3f2e30b20edf0e4cee37c4587a98fd1296a30397a6f3e"],"state_sha256":"5f35a6039dcf099efd96d5cf2a5f3747370de9f7579d983091264eba484b1ebf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wa3JmpZpXkJVxIY9jZoBmZitf8Bza9ukWlyvi7AQowDgGBdZB975jMTSbYkwQ/w5eZ7DqK3OOFKy8aMwGPF8BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-04T20:49:05.363352Z","bundle_sha256":"a92eb5529c900c44f820fd6419e3663f1ee8e7ed2ed38e70b70d93f711712faa"}}