{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:6GOR3GIFWIEZR2YLF4SFEO35ND","short_pith_number":"pith:6GOR3GIF","canonical_record":{"source":{"id":"1503.04241","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-03-13T22:51:12Z","cross_cats_sorted":[],"title_canon_sha256":"6f7b8c9371cab61fc074d116972556964ff9511c8e05c05491aad62f3226862f","abstract_canon_sha256":"41b37fdd099aed12793cfbbb2d481ca901ee0bc906c0cca219ac55124d88a859"},"schema_version":"1.0"},"canonical_sha256":"f19d1d9905b20998eb0b2f24523b7d68eb8726d387419938630f9cde5ae03ff9","source":{"kind":"arxiv","id":"1503.04241","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.04241","created_at":"2026-05-18T02:03:33Z"},{"alias_kind":"arxiv_version","alias_value":"1503.04241v1","created_at":"2026-05-18T02:03:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.04241","created_at":"2026-05-18T02:03:33Z"},{"alias_kind":"pith_short_12","alias_value":"6GOR3GIFWIEZ","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_16","alias_value":"6GOR3GIFWIEZR2YL","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_8","alias_value":"6GOR3GIF","created_at":"2026-05-18T12:29:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:6GOR3GIFWIEZR2YLF4SFEO35ND","target":"record","payload":{"canonical_record":{"source":{"id":"1503.04241","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-03-13T22:51:12Z","cross_cats_sorted":[],"title_canon_sha256":"6f7b8c9371cab61fc074d116972556964ff9511c8e05c05491aad62f3226862f","abstract_canon_sha256":"41b37fdd099aed12793cfbbb2d481ca901ee0bc906c0cca219ac55124d88a859"},"schema_version":"1.0"},"canonical_sha256":"f19d1d9905b20998eb0b2f24523b7d68eb8726d387419938630f9cde5ae03ff9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:03:33.775229Z","signature_b64":"Nw8CHzNNCCpBQd5gLyZkopmyxaXNFirAd2wYP4wgKHT1NuE9njC7X+fi9dZNdI6png5RBs8ri74W/NLJNRWfDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f19d1d9905b20998eb0b2f24523b7d68eb8726d387419938630f9cde5ae03ff9","last_reissued_at":"2026-05-18T02:03:33.774627Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:03:33.774627Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1503.04241","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":"2026-05-18T02:03:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iDneV5f3Cji9N4ZKaOxdCk1uGovKufcl4Yj5PdcjXqirsTz+1pZ/YwCbBjAcDPXDnAlx96jpPhNymc0Fv+TgBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T18:53:48.087180Z"},"content_sha256":"caf127174a64f6710f47a290ae075c60d78e44710cb8a9441ea5ca03d2a5da79","schema_version":"1.0","event_id":"sha256:caf127174a64f6710f47a290ae075c60d78e44710cb8a9441ea5ca03d2a5da79"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:6GOR3GIFWIEZR2YLF4SFEO35ND","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Brightening of Re50N: Accretion Event or Dust Clearing?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Bo Reipurth, Hsin-Fang Chiang, Josh Walawender, Martin Paegert, Michael S. Connelley, Peter Pessev, Tom R. Geballe, William M. J. Best","submitted_at":"2015-03-13T22:51:12Z","abstract_excerpt":"The luminous Class I protostar HBC 494, embedded in the Orion A cloud, is associated with a pair of reflection nebulae, Re50 and Re50N, which appeared sometime between 1955 and 1979. We have found that a dramatic brightening of Re50N has taken place sometime between 2006 and 2014. This could result if the embedded source is undergoing a FUor eruption. However, the near-infrared spectrum shows a featureless very red continuum, in contrast to the strong CO bandhead absorption displayed by FUors. Such heavy veiling, and the high luminosity of the protostar, is indicative of strong accretion but s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.04241","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":"2026-05-18T02:03:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ciHCBO63gVZN2GYsfzXiaGrluG8/2W4XtZTqeMaY6dPDRsvPjYHYndXVnX2lo33JTCE2XxDklqLhEJi+XiHvDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T18:53:48.087775Z"},"content_sha256":"3e291993254433770d64ad06e8d5155785c4ee09694e31a3f6f7d46ace16d3fc","schema_version":"1.0","event_id":"sha256:3e291993254433770d64ad06e8d5155785c4ee09694e31a3f6f7d46ace16d3fc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6GOR3GIFWIEZR2YLF4SFEO35ND/bundle.json","state_url":"https://pith.science/pith/6GOR3GIFWIEZR2YLF4SFEO35ND/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6GOR3GIFWIEZR2YLF4SFEO35ND/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":"2026-05-26T18:53:48Z","links":{"resolver":"https://pith.science/pith/6GOR3GIFWIEZR2YLF4SFEO35ND","bundle":"https://pith.science/pith/6GOR3GIFWIEZR2YLF4SFEO35ND/bundle.json","state":"https://pith.science/pith/6GOR3GIFWIEZR2YLF4SFEO35ND/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6GOR3GIFWIEZR2YLF4SFEO35ND/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:6GOR3GIFWIEZR2YLF4SFEO35ND","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":"41b37fdd099aed12793cfbbb2d481ca901ee0bc906c0cca219ac55124d88a859","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-03-13T22:51:12Z","title_canon_sha256":"6f7b8c9371cab61fc074d116972556964ff9511c8e05c05491aad62f3226862f"},"schema_version":"1.0","source":{"id":"1503.04241","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.04241","created_at":"2026-05-18T02:03:33Z"},{"alias_kind":"arxiv_version","alias_value":"1503.04241v1","created_at":"2026-05-18T02:03:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.04241","created_at":"2026-05-18T02:03:33Z"},{"alias_kind":"pith_short_12","alias_value":"6GOR3GIFWIEZ","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_16","alias_value":"6GOR3GIFWIEZR2YL","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_8","alias_value":"6GOR3GIF","created_at":"2026-05-18T12:29:07Z"}],"graph_snapshots":[{"event_id":"sha256:3e291993254433770d64ad06e8d5155785c4ee09694e31a3f6f7d46ace16d3fc","target":"graph","created_at":"2026-05-18T02:03:33Z","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":"The luminous Class I protostar HBC 494, embedded in the Orion A cloud, is associated with a pair of reflection nebulae, Re50 and Re50N, which appeared sometime between 1955 and 1979. We have found that a dramatic brightening of Re50N has taken place sometime between 2006 and 2014. This could result if the embedded source is undergoing a FUor eruption. However, the near-infrared spectrum shows a featureless very red continuum, in contrast to the strong CO bandhead absorption displayed by FUors. Such heavy veiling, and the high luminosity of the protostar, is indicative of strong accretion but s","authors_text":"Bo Reipurth, Hsin-Fang Chiang, Josh Walawender, Martin Paegert, Michael S. Connelley, Peter Pessev, Tom R. Geballe, William M. J. Best","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-03-13T22:51:12Z","title":"The Brightening of Re50N: Accretion Event or Dust Clearing?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.04241","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:caf127174a64f6710f47a290ae075c60d78e44710cb8a9441ea5ca03d2a5da79","target":"record","created_at":"2026-05-18T02:03:33Z","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":"41b37fdd099aed12793cfbbb2d481ca901ee0bc906c0cca219ac55124d88a859","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-03-13T22:51:12Z","title_canon_sha256":"6f7b8c9371cab61fc074d116972556964ff9511c8e05c05491aad62f3226862f"},"schema_version":"1.0","source":{"id":"1503.04241","kind":"arxiv","version":1}},"canonical_sha256":"f19d1d9905b20998eb0b2f24523b7d68eb8726d387419938630f9cde5ae03ff9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f19d1d9905b20998eb0b2f24523b7d68eb8726d387419938630f9cde5ae03ff9","first_computed_at":"2026-05-18T02:03:33.774627Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:03:33.774627Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Nw8CHzNNCCpBQd5gLyZkopmyxaXNFirAd2wYP4wgKHT1NuE9njC7X+fi9dZNdI6png5RBs8ri74W/NLJNRWfDw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:03:33.775229Z","signed_message":"canonical_sha256_bytes"},"source_id":"1503.04241","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:caf127174a64f6710f47a290ae075c60d78e44710cb8a9441ea5ca03d2a5da79","sha256:3e291993254433770d64ad06e8d5155785c4ee09694e31a3f6f7d46ace16d3fc"],"state_sha256":"3e2dd69d12f1bf6595e27103ff950f8c407746bd8d5a87bdb1afda6707a059fb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MGKfQJgAhCNeT9kG/MwE/bwaBsX+Ptc1z0eleofUp7oUIBdjjNYhCIracWfnqgrHsm+1bQm+GjJ8FlpagSxBDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T18:53:48.091203Z","bundle_sha256":"024fbf04b3b35abb25eed79e8d295049738e9495955c8ceab34bd2a616347019"}}