{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:4LVJTW57BK4EWIGL4KI63H5OHA","short_pith_number":"pith:4LVJTW57","canonical_record":{"source":{"id":"1103.1763","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-03-09T11:50:19Z","cross_cats_sorted":[],"title_canon_sha256":"56d1463d4d25cf345229c035e0ce056fdc74d3c18727b1ca73289fbc99fe900b","abstract_canon_sha256":"57a3a1773fc93b134e72d1ee4b1e8354a64e4dc556ae600f424caf252fd64d67"},"schema_version":"1.0"},"canonical_sha256":"e2ea99dbbf0ab84b20cbe291ed9fae380541b64af074da43c1b59afe32abda1f","source":{"kind":"arxiv","id":"1103.1763","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1103.1763","created_at":"2026-05-18T02:02:55Z"},{"alias_kind":"arxiv_version","alias_value":"1103.1763v2","created_at":"2026-05-18T02:02:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1103.1763","created_at":"2026-05-18T02:02:55Z"},{"alias_kind":"pith_short_12","alias_value":"4LVJTW57BK4E","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"4LVJTW57BK4EWIGL","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"4LVJTW57","created_at":"2026-05-18T12:26:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:4LVJTW57BK4EWIGL4KI63H5OHA","target":"record","payload":{"canonical_record":{"source":{"id":"1103.1763","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-03-09T11:50:19Z","cross_cats_sorted":[],"title_canon_sha256":"56d1463d4d25cf345229c035e0ce056fdc74d3c18727b1ca73289fbc99fe900b","abstract_canon_sha256":"57a3a1773fc93b134e72d1ee4b1e8354a64e4dc556ae600f424caf252fd64d67"},"schema_version":"1.0"},"canonical_sha256":"e2ea99dbbf0ab84b20cbe291ed9fae380541b64af074da43c1b59afe32abda1f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:02:55.823013Z","signature_b64":"OVd1ezZwh080qz3DiFbTvE3v3Ibdvcu/Rm8fDvuxnxFq0DIFuEC2fRlQOzuMnlMTjyLIqEKWUcXbsvhhDWLLBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e2ea99dbbf0ab84b20cbe291ed9fae380541b64af074da43c1b59afe32abda1f","last_reissued_at":"2026-05-18T02:02:55.822418Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:02:55.822418Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1103.1763","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":"2026-05-18T02:02:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/5k0h391FAvhPgPDNIufSz9jKzaYdpAtf6IkajwA3A7B5q0so/VuiO/MqYcahJYFttSYhd9Uo+CWBJ5yVFiBDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T16:26:21.837236Z"},"content_sha256":"bd42778365961c77e87cea6dc61ca645527ff211c284937eb079e9f388bf3a2c","schema_version":"1.0","event_id":"sha256:bd42778365961c77e87cea6dc61ca645527ff211c284937eb079e9f388bf3a2c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:4LVJTW57BK4EWIGL4KI63H5OHA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"High-resolution optical spectroscopy of V838 Monocerotis in 2009","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"M. Schmidt, R. Kurtev, R. Tylenda, T. Kami\\'nski, T. Tomov","submitted_at":"2011-03-09T11:50:19Z","abstract_excerpt":"V838 Mon erupted at the beginning of 2002. In the course of the outburst the object evolved to low effective temperatures and declined as a very late M-type supergiant. Among various scenarios proposed to explain the nature of the outburst, the most promising is a stellar merger event. We aim at studying the structure and evolution of the object in the decline from the 2002 eruption. We obtained spectroscopic observations of V838 Mon in January--March 2009 with UVES/VLT. The results are analysed and compared with similar observations obtained in October 2005 with HIRES/Keck. The most striking "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.1763","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":"2026-05-18T02:02:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k48W3e4xjVSRB0lZfNBVC54aUkWTB3PeNcjooKvtpqnHzGgoFGJjrqM7ec/+sSJo4AFUOHCMQ9MBnDQPy66wAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T16:26:21.837907Z"},"content_sha256":"4b97bde374bb3bccf6dccfd9e8f8b54fb48a7d0e5a0ff34eccf5445c18782a0c","schema_version":"1.0","event_id":"sha256:4b97bde374bb3bccf6dccfd9e8f8b54fb48a7d0e5a0ff34eccf5445c18782a0c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4LVJTW57BK4EWIGL4KI63H5OHA/bundle.json","state_url":"https://pith.science/pith/4LVJTW57BK4EWIGL4KI63H5OHA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4LVJTW57BK4EWIGL4KI63H5OHA/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":"2026-06-07T16:26:21Z","links":{"resolver":"https://pith.science/pith/4LVJTW57BK4EWIGL4KI63H5OHA","bundle":"https://pith.science/pith/4LVJTW57BK4EWIGL4KI63H5OHA/bundle.json","state":"https://pith.science/pith/4LVJTW57BK4EWIGL4KI63H5OHA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4LVJTW57BK4EWIGL4KI63H5OHA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:4LVJTW57BK4EWIGL4KI63H5OHA","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":"57a3a1773fc93b134e72d1ee4b1e8354a64e4dc556ae600f424caf252fd64d67","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-03-09T11:50:19Z","title_canon_sha256":"56d1463d4d25cf345229c035e0ce056fdc74d3c18727b1ca73289fbc99fe900b"},"schema_version":"1.0","source":{"id":"1103.1763","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1103.1763","created_at":"2026-05-18T02:02:55Z"},{"alias_kind":"arxiv_version","alias_value":"1103.1763v2","created_at":"2026-05-18T02:02:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1103.1763","created_at":"2026-05-18T02:02:55Z"},{"alias_kind":"pith_short_12","alias_value":"4LVJTW57BK4E","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"4LVJTW57BK4EWIGL","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"4LVJTW57","created_at":"2026-05-18T12:26:20Z"}],"graph_snapshots":[{"event_id":"sha256:4b97bde374bb3bccf6dccfd9e8f8b54fb48a7d0e5a0ff34eccf5445c18782a0c","target":"graph","created_at":"2026-05-18T02:02:55Z","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":"V838 Mon erupted at the beginning of 2002. In the course of the outburst the object evolved to low effective temperatures and declined as a very late M-type supergiant. Among various scenarios proposed to explain the nature of the outburst, the most promising is a stellar merger event. We aim at studying the structure and evolution of the object in the decline from the 2002 eruption. We obtained spectroscopic observations of V838 Mon in January--March 2009 with UVES/VLT. The results are analysed and compared with similar observations obtained in October 2005 with HIRES/Keck. The most striking ","authors_text":"M. Schmidt, R. Kurtev, R. Tylenda, T. Kami\\'nski, T. Tomov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-03-09T11:50:19Z","title":"High-resolution optical spectroscopy of V838 Monocerotis in 2009"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.1763","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:bd42778365961c77e87cea6dc61ca645527ff211c284937eb079e9f388bf3a2c","target":"record","created_at":"2026-05-18T02:02:55Z","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":"57a3a1773fc93b134e72d1ee4b1e8354a64e4dc556ae600f424caf252fd64d67","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-03-09T11:50:19Z","title_canon_sha256":"56d1463d4d25cf345229c035e0ce056fdc74d3c18727b1ca73289fbc99fe900b"},"schema_version":"1.0","source":{"id":"1103.1763","kind":"arxiv","version":2}},"canonical_sha256":"e2ea99dbbf0ab84b20cbe291ed9fae380541b64af074da43c1b59afe32abda1f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e2ea99dbbf0ab84b20cbe291ed9fae380541b64af074da43c1b59afe32abda1f","first_computed_at":"2026-05-18T02:02:55.822418Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:02:55.822418Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OVd1ezZwh080qz3DiFbTvE3v3Ibdvcu/Rm8fDvuxnxFq0DIFuEC2fRlQOzuMnlMTjyLIqEKWUcXbsvhhDWLLBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:02:55.823013Z","signed_message":"canonical_sha256_bytes"},"source_id":"1103.1763","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bd42778365961c77e87cea6dc61ca645527ff211c284937eb079e9f388bf3a2c","sha256:4b97bde374bb3bccf6dccfd9e8f8b54fb48a7d0e5a0ff34eccf5445c18782a0c"],"state_sha256":"fefe4fa42a9d28c51147b4aac27cabe2bd75a2db438a9560d55c797c9a6bbba0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oNfsE0k2ee7yK0VAAtRUVI5ZU8f7J6TTIRSjUcyTQUSKRfTc4/IzClgTOFEYP+i0r9XxsJxxAyoXXe6yYowaCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T16:26:21.841954Z","bundle_sha256":"3ef35346db4e4df84edd416a064b94a1a20b47b17a5d35ab2b8a9248bb6132ee"}}