{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:2LIVSL3VLC5UA3N4HK45DEPYI7","short_pith_number":"pith:2LIVSL3V","canonical_record":{"source":{"id":"1807.10332","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-07-26T19:26:03Z","cross_cats_sorted":[],"title_canon_sha256":"356ff61ca65a80afa3aa2e022c4df21bf4004fabad3825d735bf5b7d046acfa6","abstract_canon_sha256":"d81763603bb6b23fda49e79e25f0f586baca1e0f5abdab465824b510d36fd3ba"},"schema_version":"1.0"},"canonical_sha256":"d2d1592f7558bb406dbc3ab9d191f847d7351a43d9b29f6e2882b9e63dee595b","source":{"kind":"arxiv","id":"1807.10332","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.10332","created_at":"2026-05-18T00:09:40Z"},{"alias_kind":"arxiv_version","alias_value":"1807.10332v1","created_at":"2026-05-18T00:09:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.10332","created_at":"2026-05-18T00:09:40Z"},{"alias_kind":"pith_short_12","alias_value":"2LIVSL3VLC5U","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"2LIVSL3VLC5UA3N4","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"2LIVSL3V","created_at":"2026-05-18T12:32:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:2LIVSL3VLC5UA3N4HK45DEPYI7","target":"record","payload":{"canonical_record":{"source":{"id":"1807.10332","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-07-26T19:26:03Z","cross_cats_sorted":[],"title_canon_sha256":"356ff61ca65a80afa3aa2e022c4df21bf4004fabad3825d735bf5b7d046acfa6","abstract_canon_sha256":"d81763603bb6b23fda49e79e25f0f586baca1e0f5abdab465824b510d36fd3ba"},"schema_version":"1.0"},"canonical_sha256":"d2d1592f7558bb406dbc3ab9d191f847d7351a43d9b29f6e2882b9e63dee595b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:09:40.913352Z","signature_b64":"Iw8RZFiRb1EgUIg9U85/3SrYDzGfWvLzdca4JK0h+KoukdQlet+ujOalEF5G4TUeppukJkGqhYCUpUZHrr/0AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d2d1592f7558bb406dbc3ab9d191f847d7351a43d9b29f6e2882b9e63dee595b","last_reissued_at":"2026-05-18T00:09:40.912614Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:09:40.912614Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.10332","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":"2026-05-18T00:09:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ktfYrF5gr/SsM9Pjlh5s/vNqEkN7xEwffJ5DYRiI7pjl2e1c3sgR2dGZwGyibekZOVj3coGQDhk4fg6krdKZCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T07:14:06.847224Z"},"content_sha256":"56bcaa77d2f620712a9260a87116c95d79d5a7182934b5bf6368fe96ddb1adc4","schema_version":"1.0","event_id":"sha256:56bcaa77d2f620712a9260a87116c95d79d5a7182934b5bf6368fe96ddb1adc4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:2LIVSL3VLC5UA3N4HK45DEPYI7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Constraining Theories of SiO Maser Polarization: Analysis of a $pi$/2 EVPA Change","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Athol Kemball, Malcolm Gray, Taylor Tobin","submitted_at":"2018-07-26T19:26:03Z","abstract_excerpt":"The full theory of polarized SiO maser emission from the near-circumstellar environment of Asymptotic Giant Branch stars has been the subject of debate, with theories ranging from classical Zeeman origins to predominantly non-Zeeman anisotropic excitation or propagation effects. Features with an internal electric vector position angle (EVPA) rotation of $\\sim \\pi /2$ offer unique constraints on theoretical models. In this work, results are presented for one such feature that persisted across five epochs of SiO $\\nu=1, J=1-0$ VLBA observations of TX Cam. We examine the fit to the predicted depe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.10332","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":"2026-05-18T00:09:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eNixrnVYa1ivPCumxTfhWNl7bQGqHUiJ77GWR7vhbg/9Es2z00S0dnD5eogixUpJpkiPfZm+sjvO1c/bS417Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T07:14:06.847881Z"},"content_sha256":"b2c87c9a4d64e128df60903108039936892025d5203fd0e2a2869416baa1ee38","schema_version":"1.0","event_id":"sha256:b2c87c9a4d64e128df60903108039936892025d5203fd0e2a2869416baa1ee38"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2LIVSL3VLC5UA3N4HK45DEPYI7/bundle.json","state_url":"https://pith.science/pith/2LIVSL3VLC5UA3N4HK45DEPYI7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2LIVSL3VLC5UA3N4HK45DEPYI7/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":"2026-05-31T07:14:06Z","links":{"resolver":"https://pith.science/pith/2LIVSL3VLC5UA3N4HK45DEPYI7","bundle":"https://pith.science/pith/2LIVSL3VLC5UA3N4HK45DEPYI7/bundle.json","state":"https://pith.science/pith/2LIVSL3VLC5UA3N4HK45DEPYI7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2LIVSL3VLC5UA3N4HK45DEPYI7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:2LIVSL3VLC5UA3N4HK45DEPYI7","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":"d81763603bb6b23fda49e79e25f0f586baca1e0f5abdab465824b510d36fd3ba","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-07-26T19:26:03Z","title_canon_sha256":"356ff61ca65a80afa3aa2e022c4df21bf4004fabad3825d735bf5b7d046acfa6"},"schema_version":"1.0","source":{"id":"1807.10332","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.10332","created_at":"2026-05-18T00:09:40Z"},{"alias_kind":"arxiv_version","alias_value":"1807.10332v1","created_at":"2026-05-18T00:09:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.10332","created_at":"2026-05-18T00:09:40Z"},{"alias_kind":"pith_short_12","alias_value":"2LIVSL3VLC5U","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"2LIVSL3VLC5UA3N4","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"2LIVSL3V","created_at":"2026-05-18T12:32:02Z"}],"graph_snapshots":[{"event_id":"sha256:b2c87c9a4d64e128df60903108039936892025d5203fd0e2a2869416baa1ee38","target":"graph","created_at":"2026-05-18T00:09:40Z","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":"The full theory of polarized SiO maser emission from the near-circumstellar environment of Asymptotic Giant Branch stars has been the subject of debate, with theories ranging from classical Zeeman origins to predominantly non-Zeeman anisotropic excitation or propagation effects. Features with an internal electric vector position angle (EVPA) rotation of $\\sim \\pi /2$ offer unique constraints on theoretical models. In this work, results are presented for one such feature that persisted across five epochs of SiO $\\nu=1, J=1-0$ VLBA observations of TX Cam. We examine the fit to the predicted depe","authors_text":"Athol Kemball, Malcolm Gray, Taylor Tobin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-07-26T19:26:03Z","title":"Constraining Theories of SiO Maser Polarization: Analysis of a $pi$/2 EVPA Change"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.10332","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":"sha256:56bcaa77d2f620712a9260a87116c95d79d5a7182934b5bf6368fe96ddb1adc4","target":"record","created_at":"2026-05-18T00:09:40Z","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":"d81763603bb6b23fda49e79e25f0f586baca1e0f5abdab465824b510d36fd3ba","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-07-26T19:26:03Z","title_canon_sha256":"356ff61ca65a80afa3aa2e022c4df21bf4004fabad3825d735bf5b7d046acfa6"},"schema_version":"1.0","source":{"id":"1807.10332","kind":"arxiv","version":1}},"canonical_sha256":"d2d1592f7558bb406dbc3ab9d191f847d7351a43d9b29f6e2882b9e63dee595b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d2d1592f7558bb406dbc3ab9d191f847d7351a43d9b29f6e2882b9e63dee595b","first_computed_at":"2026-05-18T00:09:40.912614Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:09:40.912614Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Iw8RZFiRb1EgUIg9U85/3SrYDzGfWvLzdca4JK0h+KoukdQlet+ujOalEF5G4TUeppukJkGqhYCUpUZHrr/0AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:09:40.913352Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.10332","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:56bcaa77d2f620712a9260a87116c95d79d5a7182934b5bf6368fe96ddb1adc4","sha256:b2c87c9a4d64e128df60903108039936892025d5203fd0e2a2869416baa1ee38"],"state_sha256":"5aed181219025d25abc5b57b346fd713e20cf200870de05a4f29151b7bdabb33"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PMB6Ismwg6Ia79NZwJ8Ao51QMzrTbROS1aL3F2b7p6OT8pm0jFCxwPrQPcFiUkFloDrvxKZ6yKeif83dpAF9Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T07:14:06.850400Z","bundle_sha256":"e27b6fd0ad22af91dee5314ca6ac2747a10e0d4b127fc6645609dbef48783e7c"}}