{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:IE4M34YLLCR3LYLUAZSAEGTAKG","short_pith_number":"pith:IE4M34YL","canonical_record":{"source":{"id":"1802.05133","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-02-14T14:54:06Z","cross_cats_sorted":[],"title_canon_sha256":"d473fc13ece9bb48db7c17735c5cd75739204b3d528147796e2b3479f241fe11","abstract_canon_sha256":"bffa40bde580f8879d6f72f89fbd25bb42b89116bf21c54b10906b3fbbd82807"},"schema_version":"1.0"},"canonical_sha256":"4138cdf30b58a3b5e1740664021a60518ff1c4df7c05110b1afe477e2813f762","source":{"kind":"arxiv","id":"1802.05133","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.05133","created_at":"2026-05-18T00:07:40Z"},{"alias_kind":"arxiv_version","alias_value":"1802.05133v1","created_at":"2026-05-18T00:07:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.05133","created_at":"2026-05-18T00:07:40Z"},{"alias_kind":"pith_short_12","alias_value":"IE4M34YLLCR3","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"IE4M34YLLCR3LYLU","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"IE4M34YL","created_at":"2026-05-18T12:32:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:IE4M34YLLCR3LYLUAZSAEGTAKG","target":"record","payload":{"canonical_record":{"source":{"id":"1802.05133","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-02-14T14:54:06Z","cross_cats_sorted":[],"title_canon_sha256":"d473fc13ece9bb48db7c17735c5cd75739204b3d528147796e2b3479f241fe11","abstract_canon_sha256":"bffa40bde580f8879d6f72f89fbd25bb42b89116bf21c54b10906b3fbbd82807"},"schema_version":"1.0"},"canonical_sha256":"4138cdf30b58a3b5e1740664021a60518ff1c4df7c05110b1afe477e2813f762","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:07:40.824153Z","signature_b64":"1GFwORT0RgmGg5xIC6IQtjPCNjd/ngeLD2EOGhImJBaZW2bs1wprJRFo5bZ/xKmYA9vYQvQCqS1D0IFWdDdLDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4138cdf30b58a3b5e1740664021a60518ff1c4df7c05110b1afe477e2813f762","last_reissued_at":"2026-05-18T00:07:40.823426Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:07:40.823426Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.05133","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":"2026-05-18T00:07:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ug7pwFXgVIPkIyUNUeiSjHNDnl4N3Lc7IBUFBqmmqgKzPYtyZT5wPLyw6p71fOmrwzRFJ1I8ctVxG8thwCZECg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T06:58:47.695732Z"},"content_sha256":"cff1a247137f4eb420baa6f9fd081f11294af8092c118c975813f8953cedc445","schema_version":"1.0","event_id":"sha256:cff1a247137f4eb420baa6f9fd081f11294af8092c118c975813f8953cedc445"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:IE4M34YLLCR3LYLUAZSAEGTAKG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"RadioAstron space-VLBI project: studies of masers in star forming regions of our Galaxy and megamasers in external galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. M. Sobolev, A. V. Alakoz, N. N. Shakhvorostova, W. A. Baan","submitted_at":"2018-02-14T14:54:06Z","abstract_excerpt":"Observations of the masers in the course of RadioAstron mission yielded detections of fringes for a number of sources in both water and hydroxyl maser transitions. Several sources display numerous ultra-compact details. This proves that implementation of the space VLBI technique for maser studies is possible technically and is not always prevented by the interstellar scattering, maser beaming and other effects related to formation, transfer, and detection of the cosmic maser emission. For the first time, cosmic water maser emission was detected with projected baselines exceeding Earth Diameter"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.05133","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":"2026-05-18T00:07:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dAQzKVZ1vI4M/fsIR1NWPtsvIcGi5k74bJM237Ox8YRUN93xmot+BOqqbuC5gmktSltZ4lhsFXqIr4lyTODNCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T06:58:47.696092Z"},"content_sha256":"a010f937796868addb441d72cf740733df23fbf2c351a64ce9d7d8b6a610dc12","schema_version":"1.0","event_id":"sha256:a010f937796868addb441d72cf740733df23fbf2c351a64ce9d7d8b6a610dc12"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IE4M34YLLCR3LYLUAZSAEGTAKG/bundle.json","state_url":"https://pith.science/pith/IE4M34YLLCR3LYLUAZSAEGTAKG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IE4M34YLLCR3LYLUAZSAEGTAKG/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":"2026-06-28T06:58:47Z","links":{"resolver":"https://pith.science/pith/IE4M34YLLCR3LYLUAZSAEGTAKG","bundle":"https://pith.science/pith/IE4M34YLLCR3LYLUAZSAEGTAKG/bundle.json","state":"https://pith.science/pith/IE4M34YLLCR3LYLUAZSAEGTAKG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IE4M34YLLCR3LYLUAZSAEGTAKG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:IE4M34YLLCR3LYLUAZSAEGTAKG","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":"bffa40bde580f8879d6f72f89fbd25bb42b89116bf21c54b10906b3fbbd82807","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-02-14T14:54:06Z","title_canon_sha256":"d473fc13ece9bb48db7c17735c5cd75739204b3d528147796e2b3479f241fe11"},"schema_version":"1.0","source":{"id":"1802.05133","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.05133","created_at":"2026-05-18T00:07:40Z"},{"alias_kind":"arxiv_version","alias_value":"1802.05133v1","created_at":"2026-05-18T00:07:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.05133","created_at":"2026-05-18T00:07:40Z"},{"alias_kind":"pith_short_12","alias_value":"IE4M34YLLCR3","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"IE4M34YLLCR3LYLU","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"IE4M34YL","created_at":"2026-05-18T12:32:28Z"}],"graph_snapshots":[{"event_id":"sha256:a010f937796868addb441d72cf740733df23fbf2c351a64ce9d7d8b6a610dc12","target":"graph","created_at":"2026-05-18T00:07:40Z","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":"Observations of the masers in the course of RadioAstron mission yielded detections of fringes for a number of sources in both water and hydroxyl maser transitions. Several sources display numerous ultra-compact details. This proves that implementation of the space VLBI technique for maser studies is possible technically and is not always prevented by the interstellar scattering, maser beaming and other effects related to formation, transfer, and detection of the cosmic maser emission. For the first time, cosmic water maser emission was detected with projected baselines exceeding Earth Diameter","authors_text":"A. M. Sobolev, A. V. Alakoz, N. N. Shakhvorostova, W. A. Baan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-02-14T14:54:06Z","title":"RadioAstron space-VLBI project: studies of masers in star forming regions of our Galaxy and megamasers in external galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.05133","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:cff1a247137f4eb420baa6f9fd081f11294af8092c118c975813f8953cedc445","target":"record","created_at":"2026-05-18T00:07:40Z","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":"bffa40bde580f8879d6f72f89fbd25bb42b89116bf21c54b10906b3fbbd82807","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-02-14T14:54:06Z","title_canon_sha256":"d473fc13ece9bb48db7c17735c5cd75739204b3d528147796e2b3479f241fe11"},"schema_version":"1.0","source":{"id":"1802.05133","kind":"arxiv","version":1}},"canonical_sha256":"4138cdf30b58a3b5e1740664021a60518ff1c4df7c05110b1afe477e2813f762","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4138cdf30b58a3b5e1740664021a60518ff1c4df7c05110b1afe477e2813f762","first_computed_at":"2026-05-18T00:07:40.823426Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:07:40.823426Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1GFwORT0RgmGg5xIC6IQtjPCNjd/ngeLD2EOGhImJBaZW2bs1wprJRFo5bZ/xKmYA9vYQvQCqS1D0IFWdDdLDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:07:40.824153Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.05133","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cff1a247137f4eb420baa6f9fd081f11294af8092c118c975813f8953cedc445","sha256:a010f937796868addb441d72cf740733df23fbf2c351a64ce9d7d8b6a610dc12"],"state_sha256":"d6d8e0f5ff7a7a9642b1aee8d836d352d73470dbd0c9a0c7f2cfa43e58ed0eaa"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MeSwFk7OpJ9aCVMqWUegF1lc1Ga3WCHttvfB7vOj/bCRsqFKc5tPnlK1kksMJd43wyFns6mKveF08UkDk1yoBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-28T06:58:47.698048Z","bundle_sha256":"11bd5194b7246f75ade53873375328c51b3e274078d6c85282e1a49923a1a69a"}}