{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:LQOIDMOUIYAK4UNGK6AXGEAZ5Z","short_pith_number":"pith:LQOIDMOU","canonical_record":{"source":{"id":"1412.6481","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-12-19T18:44:57Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"8e07dbef2d57ec5c98bec5e0833a60fdbcfa07e109d529c5d39039507ca6cd38","abstract_canon_sha256":"6b5359b46024e3f7a6715d63143aabe75961cdfcc2c7f13d5dd0cf1dce748793"},"schema_version":"1.0"},"canonical_sha256":"5c1c81b1d44600ae51a65781731019ee6a7a046934ebf6c14652af4976eb7c9c","source":{"kind":"arxiv","id":"1412.6481","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.6481","created_at":"2026-05-18T02:30:48Z"},{"alias_kind":"arxiv_version","alias_value":"1412.6481v1","created_at":"2026-05-18T02:30:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.6481","created_at":"2026-05-18T02:30:48Z"},{"alias_kind":"pith_short_12","alias_value":"LQOIDMOUIYAK","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_16","alias_value":"LQOIDMOUIYAK4UNG","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_8","alias_value":"LQOIDMOU","created_at":"2026-05-18T12:28:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:LQOIDMOUIYAK4UNGK6AXGEAZ5Z","target":"record","payload":{"canonical_record":{"source":{"id":"1412.6481","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-12-19T18:44:57Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"8e07dbef2d57ec5c98bec5e0833a60fdbcfa07e109d529c5d39039507ca6cd38","abstract_canon_sha256":"6b5359b46024e3f7a6715d63143aabe75961cdfcc2c7f13d5dd0cf1dce748793"},"schema_version":"1.0"},"canonical_sha256":"5c1c81b1d44600ae51a65781731019ee6a7a046934ebf6c14652af4976eb7c9c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:30:48.280684Z","signature_b64":"AbcJTt6ibZPel1fY29ENlQa3VATYIkgVVNWkGh25oM/uCbh/KI9T8+0Ebga4cC0RzmA2kQ8rSwhvLYq4WUmbAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5c1c81b1d44600ae51a65781731019ee6a7a046934ebf6c14652af4976eb7c9c","last_reissued_at":"2026-05-18T02:30:48.280213Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:30:48.280213Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1412.6481","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":"2026-05-18T02:30:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7M4WhTd+Cso7PaxVmOftu+4Slx0HcStC8Umy/eQXm48VqtmAoakwDwqJyQCHEh5WfukyT1QvDhQuutsl/MdnBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T08:28:41.242942Z"},"content_sha256":"487c5cb1b39ff0630480db73555feaf567fd9f45d734444a6f44a9cbe7af03b6","schema_version":"1.0","event_id":"sha256:487c5cb1b39ff0630480db73555feaf567fd9f45d734444a6f44a9cbe7af03b6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:LQOIDMOUIYAK4UNGK6AXGEAZ5Z","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Tomography of Galactic star-forming regions and spiral arms with the Square Kilometer Array","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Amy J. Mioduszewski (NRAO Socorro), Andreas Brunthaler (MPIfR Bonn), Gisela N. Ortiz-Leon (CRyA-UNAM), Huib Jan van Langevelde (JIVE/Sterrewacht Leiden), James A. Green (SKA Organisation), Jan Forbrich (University of Vienna), Kazi L.J. Rygl (ESA-ESTEC Noordwijk), Laurent Loinard (CRyA-UNAM), Luis F. Rodriguez (CRyA-UNAM), Mark Thompson (University of Hertfordshire), Melvin Hoare (Leeds University), Rosa M. Torres-Lopez (U. Guadalajara), Sergio A. Dzib (MPIfR Bonn), Simon Ellingsen (University of Tasmania), Tyler L. Bourke (SKA Organisation)","submitted_at":"2014-12-19T18:44:57Z","abstract_excerpt":"Very Long Baseline Interferometry (VLBI) at radio wavelengths can provide astrometry accurate to 10 micro-arcseconds or better (i.e. better than the target GAIA accuracy) without being limited by dust obscuration. This means that unlike GAIA, VLBI can be applied to star-forming regions independently of their internal and line-of-sight extinction. Low-mass young stellar objects (particularly T Tauri stars) are often non-thermal compact radio emitters, ideal for astrometric VLBI radio continuum experiments. Existing observations for nearby regions (e.g. Taurus, Ophiuchus, or Orion) demonstrate t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.6481","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":"2026-05-18T02:30:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fFBV01txffV6y3QifjWD24XYdOm3iUschJ3K4mUdcr1DD9JjPhUHWJaDu/U91z3oj/PO9R65hU6NEM3NXeIxBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T08:28:41.243297Z"},"content_sha256":"05b8be8717241bd86e049db22d3f182d62452b56ba993e9fa10d6e92c93953c8","schema_version":"1.0","event_id":"sha256:05b8be8717241bd86e049db22d3f182d62452b56ba993e9fa10d6e92c93953c8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LQOIDMOUIYAK4UNGK6AXGEAZ5Z/bundle.json","state_url":"https://pith.science/pith/LQOIDMOUIYAK4UNGK6AXGEAZ5Z/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LQOIDMOUIYAK4UNGK6AXGEAZ5Z/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":"2026-06-25T08:28:41Z","links":{"resolver":"https://pith.science/pith/LQOIDMOUIYAK4UNGK6AXGEAZ5Z","bundle":"https://pith.science/pith/LQOIDMOUIYAK4UNGK6AXGEAZ5Z/bundle.json","state":"https://pith.science/pith/LQOIDMOUIYAK4UNGK6AXGEAZ5Z/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LQOIDMOUIYAK4UNGK6AXGEAZ5Z/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:LQOIDMOUIYAK4UNGK6AXGEAZ5Z","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":"6b5359b46024e3f7a6715d63143aabe75961cdfcc2c7f13d5dd0cf1dce748793","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-12-19T18:44:57Z","title_canon_sha256":"8e07dbef2d57ec5c98bec5e0833a60fdbcfa07e109d529c5d39039507ca6cd38"},"schema_version":"1.0","source":{"id":"1412.6481","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.6481","created_at":"2026-05-18T02:30:48Z"},{"alias_kind":"arxiv_version","alias_value":"1412.6481v1","created_at":"2026-05-18T02:30:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.6481","created_at":"2026-05-18T02:30:48Z"},{"alias_kind":"pith_short_12","alias_value":"LQOIDMOUIYAK","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_16","alias_value":"LQOIDMOUIYAK4UNG","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_8","alias_value":"LQOIDMOU","created_at":"2026-05-18T12:28:38Z"}],"graph_snapshots":[{"event_id":"sha256:05b8be8717241bd86e049db22d3f182d62452b56ba993e9fa10d6e92c93953c8","target":"graph","created_at":"2026-05-18T02:30:48Z","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":"Very Long Baseline Interferometry (VLBI) at radio wavelengths can provide astrometry accurate to 10 micro-arcseconds or better (i.e. better than the target GAIA accuracy) without being limited by dust obscuration. This means that unlike GAIA, VLBI can be applied to star-forming regions independently of their internal and line-of-sight extinction. Low-mass young stellar objects (particularly T Tauri stars) are often non-thermal compact radio emitters, ideal for astrometric VLBI radio continuum experiments. Existing observations for nearby regions (e.g. Taurus, Ophiuchus, or Orion) demonstrate t","authors_text":"Amy J. Mioduszewski (NRAO Socorro), Andreas Brunthaler (MPIfR Bonn), Gisela N. Ortiz-Leon (CRyA-UNAM), Huib Jan van Langevelde (JIVE/Sterrewacht Leiden), James A. Green (SKA Organisation), Jan Forbrich (University of Vienna), Kazi L.J. Rygl (ESA-ESTEC Noordwijk), Laurent Loinard (CRyA-UNAM), Luis F. Rodriguez (CRyA-UNAM), Mark Thompson (University of Hertfordshire), Melvin Hoare (Leeds University), Rosa M. Torres-Lopez (U. Guadalajara), Sergio A. Dzib (MPIfR Bonn), Simon Ellingsen (University of Tasmania), Tyler L. Bourke (SKA Organisation)","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-12-19T18:44:57Z","title":"Tomography of Galactic star-forming regions and spiral arms with the Square Kilometer Array"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.6481","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":"sha256:487c5cb1b39ff0630480db73555feaf567fd9f45d734444a6f44a9cbe7af03b6","target":"record","created_at":"2026-05-18T02:30:48Z","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":"6b5359b46024e3f7a6715d63143aabe75961cdfcc2c7f13d5dd0cf1dce748793","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-12-19T18:44:57Z","title_canon_sha256":"8e07dbef2d57ec5c98bec5e0833a60fdbcfa07e109d529c5d39039507ca6cd38"},"schema_version":"1.0","source":{"id":"1412.6481","kind":"arxiv","version":1}},"canonical_sha256":"5c1c81b1d44600ae51a65781731019ee6a7a046934ebf6c14652af4976eb7c9c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5c1c81b1d44600ae51a65781731019ee6a7a046934ebf6c14652af4976eb7c9c","first_computed_at":"2026-05-18T02:30:48.280213Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:30:48.280213Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AbcJTt6ibZPel1fY29ENlQa3VATYIkgVVNWkGh25oM/uCbh/KI9T8+0Ebga4cC0RzmA2kQ8rSwhvLYq4WUmbAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:30:48.280684Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.6481","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:487c5cb1b39ff0630480db73555feaf567fd9f45d734444a6f44a9cbe7af03b6","sha256:05b8be8717241bd86e049db22d3f182d62452b56ba993e9fa10d6e92c93953c8"],"state_sha256":"0e7b68ea68725594f09de7ec27d3926593b1a71475f9a5e487c092fc6e025747"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"i9gH2V7haQSgxezphhva1vagW96VJzejWvHzUehiUVjZiP0E2NtHD4nCaRB8lCj4dQ+19iCv1oqthhMa/SEtCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-25T08:28:41.245265Z","bundle_sha256":"0e3f2e7390966803e08b5f2d5d6ac2e0561b506dbcb970ab51a862c68658b407"}}