{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:T4N5XW5XCSZWGUGBJ7CA57W5VF","short_pith_number":"pith:T4N5XW5X","canonical_record":{"source":{"id":"1912.00729","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-12-02T12:57:25Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"0bc90af2a131a409f82826f3c5189ecd30cbce1ba69b16f2fe549168c08834df","abstract_canon_sha256":"dbe3f089997eb7bd039b3b0e182f1ea5f2f6840f0e72aa857f4f3e7fb8724a1e"},"schema_version":"1.0"},"canonical_sha256":"9f1bdbdbb714b36350c14fc40efedda97b314ef4cd070b9af9823600d0669ec2","source":{"kind":"arxiv","id":"1912.00729","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1912.00729","created_at":"2026-07-05T00:23:16Z"},{"alias_kind":"arxiv_version","alias_value":"1912.00729v1","created_at":"2026-07-05T00:23:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1912.00729","created_at":"2026-07-05T00:23:16Z"},{"alias_kind":"pith_short_12","alias_value":"T4N5XW5XCSZW","created_at":"2026-07-05T00:23:16Z"},{"alias_kind":"pith_short_16","alias_value":"T4N5XW5XCSZWGUGB","created_at":"2026-07-05T00:23:16Z"},{"alias_kind":"pith_short_8","alias_value":"T4N5XW5X","created_at":"2026-07-05T00:23:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:T4N5XW5XCSZWGUGBJ7CA57W5VF","target":"record","payload":{"canonical_record":{"source":{"id":"1912.00729","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-12-02T12:57:25Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"0bc90af2a131a409f82826f3c5189ecd30cbce1ba69b16f2fe549168c08834df","abstract_canon_sha256":"dbe3f089997eb7bd039b3b0e182f1ea5f2f6840f0e72aa857f4f3e7fb8724a1e"},"schema_version":"1.0"},"canonical_sha256":"9f1bdbdbb714b36350c14fc40efedda97b314ef4cd070b9af9823600d0669ec2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:23:16.218689Z","signature_b64":"zKGpSgZfGEPQmsyoGV8yNs0AyP4b5E7i4JHYkG555zJrZZPUJqsV59waa7lH7Fv17i4lQXbf+9HId56xkd0iDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9f1bdbdbb714b36350c14fc40efedda97b314ef4cd070b9af9823600d0669ec2","last_reissued_at":"2026-07-05T00:23:16.218345Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:23:16.218345Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1912.00729","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":"2026-07-05T00:23:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8DAAuSh3cZGcQ4QETpgKaQgKXtGNxvA6rr235lo3yyVF2ndaQF4pl/3YDodTHk8Z62IEmkvaqzQylJaPJgMcDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T03:04:52.677997Z"},"content_sha256":"394345cbfac78926b46804ac0a06ddc68f09d3ffcfffcfbc7add083207606834","schema_version":"1.0","event_id":"sha256:394345cbfac78926b46804ac0a06ddc68f09d3ffcfffcfbc7add083207606834"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:T4N5XW5XCSZWGUGBJ7CA57W5VF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Short and long term near-infrared spectroscopic variability of eruptive protostars from VVV","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"A. Caratti o Garatti, C. Contreras Pe\\~na, D. Froebrich, D. Minniti, J. Alonso-Garc\\'ia, J. Borissova, L. C. Smith, P. W. Lucas, R. G. Kurtev, Zhen Guo","submitted_at":"2019-12-02T12:57:25Z","abstract_excerpt":"Numerous eruptive variable young stellar objects (YSOs), mostly Class I systems, were recently detected by the near-infrared Vista Variables in the Via Lactea (VVV) survey. We present an exploratory near-infrared spectroscopic variability study of 14 eruptive YSOs. The variations were sampled over 1-day and 1 to 2-year intervals and analysed in combination with VVV light curves. CO overtone absorption features are observed on 3 objects with FUor-like spectra: all show deeper absorption when they are brighter. This implies stronger emission from the circumstellar disc with a steeper vertical te"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.00729","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/1912.00729/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":"2026-07-05T00:23:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c0TUlbPMlimBlHOftx2O7a92eyNFF9YX9HKJZW95izq9oFZ/UvdoojRtIMEfGHxuTevU140g1RSa9vbgpFLQDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T03:04:52.678506Z"},"content_sha256":"313b9e928f628ec692da67db5eac6a7a0bb4f38e2704328dd019274093544dcd","schema_version":"1.0","event_id":"sha256:313b9e928f628ec692da67db5eac6a7a0bb4f38e2704328dd019274093544dcd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T4N5XW5XCSZWGUGBJ7CA57W5VF/bundle.json","state_url":"https://pith.science/pith/T4N5XW5XCSZWGUGBJ7CA57W5VF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T4N5XW5XCSZWGUGBJ7CA57W5VF/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":"2026-08-16T03:04:52Z","links":{"resolver":"https://pith.science/pith/T4N5XW5XCSZWGUGBJ7CA57W5VF","bundle":"https://pith.science/pith/T4N5XW5XCSZWGUGBJ7CA57W5VF/bundle.json","state":"https://pith.science/pith/T4N5XW5XCSZWGUGBJ7CA57W5VF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T4N5XW5XCSZWGUGBJ7CA57W5VF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:T4N5XW5XCSZWGUGBJ7CA57W5VF","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":"dbe3f089997eb7bd039b3b0e182f1ea5f2f6840f0e72aa857f4f3e7fb8724a1e","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-12-02T12:57:25Z","title_canon_sha256":"0bc90af2a131a409f82826f3c5189ecd30cbce1ba69b16f2fe549168c08834df"},"schema_version":"1.0","source":{"id":"1912.00729","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1912.00729","created_at":"2026-07-05T00:23:16Z"},{"alias_kind":"arxiv_version","alias_value":"1912.00729v1","created_at":"2026-07-05T00:23:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1912.00729","created_at":"2026-07-05T00:23:16Z"},{"alias_kind":"pith_short_12","alias_value":"T4N5XW5XCSZW","created_at":"2026-07-05T00:23:16Z"},{"alias_kind":"pith_short_16","alias_value":"T4N5XW5XCSZWGUGB","created_at":"2026-07-05T00:23:16Z"},{"alias_kind":"pith_short_8","alias_value":"T4N5XW5X","created_at":"2026-07-05T00:23:16Z"}],"graph_snapshots":[{"event_id":"sha256:313b9e928f628ec692da67db5eac6a7a0bb4f38e2704328dd019274093544dcd","target":"graph","created_at":"2026-07-05T00:23:16Z","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/1912.00729/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Numerous eruptive variable young stellar objects (YSOs), mostly Class I systems, were recently detected by the near-infrared Vista Variables in the Via Lactea (VVV) survey. We present an exploratory near-infrared spectroscopic variability study of 14 eruptive YSOs. The variations were sampled over 1-day and 1 to 2-year intervals and analysed in combination with VVV light curves. CO overtone absorption features are observed on 3 objects with FUor-like spectra: all show deeper absorption when they are brighter. This implies stronger emission from the circumstellar disc with a steeper vertical te","authors_text":"A. Caratti o Garatti, C. Contreras Pe\\~na, D. Froebrich, D. Minniti, J. Alonso-Garc\\'ia, J. Borissova, L. C. Smith, P. W. Lucas, R. G. Kurtev, Zhen Guo","cross_cats":["astro-ph.GA"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-12-02T12:57:25Z","title":"Short and long term near-infrared spectroscopic variability of eruptive protostars from VVV"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.00729","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":"sha256:394345cbfac78926b46804ac0a06ddc68f09d3ffcfffcfbc7add083207606834","target":"record","created_at":"2026-07-05T00:23:16Z","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":"dbe3f089997eb7bd039b3b0e182f1ea5f2f6840f0e72aa857f4f3e7fb8724a1e","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-12-02T12:57:25Z","title_canon_sha256":"0bc90af2a131a409f82826f3c5189ecd30cbce1ba69b16f2fe549168c08834df"},"schema_version":"1.0","source":{"id":"1912.00729","kind":"arxiv","version":1}},"canonical_sha256":"9f1bdbdbb714b36350c14fc40efedda97b314ef4cd070b9af9823600d0669ec2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9f1bdbdbb714b36350c14fc40efedda97b314ef4cd070b9af9823600d0669ec2","first_computed_at":"2026-07-05T00:23:16.218345Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:23:16.218345Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zKGpSgZfGEPQmsyoGV8yNs0AyP4b5E7i4JHYkG555zJrZZPUJqsV59waa7lH7Fv17i4lQXbf+9HId56xkd0iDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:23:16.218689Z","signed_message":"canonical_sha256_bytes"},"source_id":"1912.00729","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:394345cbfac78926b46804ac0a06ddc68f09d3ffcfffcfbc7add083207606834","sha256:313b9e928f628ec692da67db5eac6a7a0bb4f38e2704328dd019274093544dcd"],"state_sha256":"0d4780dd09a3bc9acc717fa01de38a69eb2438cc86ab1bc93a8985cfa46cdfe7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Lv1zzoNzgNVvPcivJkvPTYTsPaSu64DjyxXlMv1JKTqMntUjXhHSUMaPC6ulV4cUXq7kvAR/imEZr5usSpe5CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T03:04:52.683082Z","bundle_sha256":"519b47f785df1eba06f187c0f03d80a1c4b083e06d8cc06c407e2751d72a427e"}}