{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:QRZDXO4ZWZTHRFT5PZWDJR5YGK","short_pith_number":"pith:QRZDXO4Z","canonical_record":{"source":{"id":"1711.07598","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-11-21T01:38:05Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"b0d6c74cd1e2916483e5e96c27e6327c6bf81e827b2b6e18ed971bdade148180","abstract_canon_sha256":"025c220536c3596b3360dd1a6073b42880c1595b1b127d451bee1999befed313"},"schema_version":"1.0"},"canonical_sha256":"84723bbb99b66678967d7e6c34c7b832a3ddaf85a99bed4b745c00d9c20c7bf9","source":{"kind":"arxiv","id":"1711.07598","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.07598","created_at":"2026-05-18T00:27:17Z"},{"alias_kind":"arxiv_version","alias_value":"1711.07598v1","created_at":"2026-05-18T00:27:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.07598","created_at":"2026-05-18T00:27:17Z"},{"alias_kind":"pith_short_12","alias_value":"QRZDXO4ZWZTH","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_16","alias_value":"QRZDXO4ZWZTHRFT5","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_8","alias_value":"QRZDXO4Z","created_at":"2026-05-18T12:31:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:QRZDXO4ZWZTHRFT5PZWDJR5YGK","target":"record","payload":{"canonical_record":{"source":{"id":"1711.07598","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-11-21T01:38:05Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"b0d6c74cd1e2916483e5e96c27e6327c6bf81e827b2b6e18ed971bdade148180","abstract_canon_sha256":"025c220536c3596b3360dd1a6073b42880c1595b1b127d451bee1999befed313"},"schema_version":"1.0"},"canonical_sha256":"84723bbb99b66678967d7e6c34c7b832a3ddaf85a99bed4b745c00d9c20c7bf9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:27:17.767258Z","signature_b64":"EJ5h3k2dONUbBqZ/vJtIkYHwKrgIeuw36B1pipnkOQxEfwziY+73NkGYzhGkeyjMAkNeOBBsxUmVWeF/bDAZAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"84723bbb99b66678967d7e6c34c7b832a3ddaf85a99bed4b745c00d9c20c7bf9","last_reissued_at":"2026-05-18T00:27:17.766880Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:27:17.766880Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1711.07598","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":"2026-05-18T00:27:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g+shgUzXxmaRW37wpQMYuwKI8fNiWwxYeVnAbvRt5LIYg73eCdqSgAaqBR9SH6zOQSg3BJBJsFBqePRmtJHtAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T11:56:06.283221Z"},"content_sha256":"54cab5527abb3cf593c28b930afea3127a644bf3df8dd9d374542a0de02c4ea4","schema_version":"1.0","event_id":"sha256:54cab5527abb3cf593c28b930afea3127a644bf3df8dd9d374542a0de02c4ea4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:QRZDXO4ZWZTHRFT5PZWDJR5YGK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Revisiting LS I +61 303 with VLBI astrometry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"B. Zhang, G. Torricelli-Ciamponi, L. Shao, M. J. Reid, M. Massi, X. W. Zheng, Y. W. Wu","submitted_at":"2017-11-21T01:38:05Z","abstract_excerpt":"We conducted multi-epoch VLBA phase reference observations of LS I +61 303 in order to study its precessing radio jet. Compared to similar observations in 2006, we find that the observed elliptical trajectory of emission at 8.4 GHz repeats after the 9-year gap. The accurate alignment of the emission patterns yields a precession period of 26.926 +- 0.005 d, which is consistent with that determined by Lomb-Scargle analysis of the radio light curve. We analytically model the projection on the sky plane of the peak position of a precessing, synchrotron-emitting jet, which traces an elliptical traj"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.07598","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":"2026-05-18T00:27:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GhguXqkdMsjPOJKg6Ef7eB6Tikx7J9uKXo4KOwBciM0voig3//mbd/yifDcwrd4o5+1VSTPYrzntMnOxepO8CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T11:56:06.283928Z"},"content_sha256":"863bc28ed71c9d6023c63202ee83440c99c3d28e0fbbb6e76d8ddf5a979559ff","schema_version":"1.0","event_id":"sha256:863bc28ed71c9d6023c63202ee83440c99c3d28e0fbbb6e76d8ddf5a979559ff"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QRZDXO4ZWZTHRFT5PZWDJR5YGK/bundle.json","state_url":"https://pith.science/pith/QRZDXO4ZWZTHRFT5PZWDJR5YGK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QRZDXO4ZWZTHRFT5PZWDJR5YGK/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":"2026-05-22T11:56:06Z","links":{"resolver":"https://pith.science/pith/QRZDXO4ZWZTHRFT5PZWDJR5YGK","bundle":"https://pith.science/pith/QRZDXO4ZWZTHRFT5PZWDJR5YGK/bundle.json","state":"https://pith.science/pith/QRZDXO4ZWZTHRFT5PZWDJR5YGK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QRZDXO4ZWZTHRFT5PZWDJR5YGK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:QRZDXO4ZWZTHRFT5PZWDJR5YGK","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":"025c220536c3596b3360dd1a6073b42880c1595b1b127d451bee1999befed313","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-11-21T01:38:05Z","title_canon_sha256":"b0d6c74cd1e2916483e5e96c27e6327c6bf81e827b2b6e18ed971bdade148180"},"schema_version":"1.0","source":{"id":"1711.07598","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.07598","created_at":"2026-05-18T00:27:17Z"},{"alias_kind":"arxiv_version","alias_value":"1711.07598v1","created_at":"2026-05-18T00:27:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.07598","created_at":"2026-05-18T00:27:17Z"},{"alias_kind":"pith_short_12","alias_value":"QRZDXO4ZWZTH","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_16","alias_value":"QRZDXO4ZWZTHRFT5","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_8","alias_value":"QRZDXO4Z","created_at":"2026-05-18T12:31:39Z"}],"graph_snapshots":[{"event_id":"sha256:863bc28ed71c9d6023c63202ee83440c99c3d28e0fbbb6e76d8ddf5a979559ff","target":"graph","created_at":"2026-05-18T00:27:17Z","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":"We conducted multi-epoch VLBA phase reference observations of LS I +61 303 in order to study its precessing radio jet. Compared to similar observations in 2006, we find that the observed elliptical trajectory of emission at 8.4 GHz repeats after the 9-year gap. The accurate alignment of the emission patterns yields a precession period of 26.926 +- 0.005 d, which is consistent with that determined by Lomb-Scargle analysis of the radio light curve. We analytically model the projection on the sky plane of the peak position of a precessing, synchrotron-emitting jet, which traces an elliptical traj","authors_text":"B. Zhang, G. Torricelli-Ciamponi, L. Shao, M. J. Reid, M. Massi, X. W. Zheng, Y. W. Wu","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-11-21T01:38:05Z","title":"Revisiting LS I +61 303 with VLBI astrometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.07598","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":"sha256:54cab5527abb3cf593c28b930afea3127a644bf3df8dd9d374542a0de02c4ea4","target":"record","created_at":"2026-05-18T00:27:17Z","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":"025c220536c3596b3360dd1a6073b42880c1595b1b127d451bee1999befed313","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-11-21T01:38:05Z","title_canon_sha256":"b0d6c74cd1e2916483e5e96c27e6327c6bf81e827b2b6e18ed971bdade148180"},"schema_version":"1.0","source":{"id":"1711.07598","kind":"arxiv","version":1}},"canonical_sha256":"84723bbb99b66678967d7e6c34c7b832a3ddaf85a99bed4b745c00d9c20c7bf9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"84723bbb99b66678967d7e6c34c7b832a3ddaf85a99bed4b745c00d9c20c7bf9","first_computed_at":"2026-05-18T00:27:17.766880Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:27:17.766880Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EJ5h3k2dONUbBqZ/vJtIkYHwKrgIeuw36B1pipnkOQxEfwziY+73NkGYzhGkeyjMAkNeOBBsxUmVWeF/bDAZAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:27:17.767258Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.07598","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:54cab5527abb3cf593c28b930afea3127a644bf3df8dd9d374542a0de02c4ea4","sha256:863bc28ed71c9d6023c63202ee83440c99c3d28e0fbbb6e76d8ddf5a979559ff"],"state_sha256":"842c279fc8c3a042a272bb034f0f0185b7492cebf8926d70d2d9d017d88db23d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aAxcvNFCEdf4DCqj561BliFDu4OXq6MULMyyi/0qvNa2Cg8VpuET4+BZApNqDAvxZ0qhcXIUJiNV0xUXYd6MAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-22T11:56:06.287472Z","bundle_sha256":"3172896e213efd08263ea3f84b923507e3043adfa6c7aff70c9e2e3ec45def62"}}