{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:QPY4SLR2Y242OL34GSA66P2XAP","short_pith_number":"pith:QPY4SLR2","schema_version":"1.0","canonical_sha256":"83f1c92e3ac6b9a72f7c3481ef3f5703fa99a7ab3df5252eb44be296ab641621","source":{"kind":"arxiv","id":"1701.05846","version":1},"attestation_state":"computed","paper":{"title":"Proper Motions of Jets on the Kiloparsec Scale: New Results with HST","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Colin Norman, Eileen T. Meyer, Eric Perlman, Jay Anderson, John Biretta, Marco Chiaberge, Markos Georganopoulos, Roeland van der Marel, Sangmo T. Sohn, William B. Sparks","submitted_at":"2017-01-20T16:30:31Z","abstract_excerpt":"The Hubble Space Telescope recently celebrated 25 years of operation. Some of the first images of extragalactic optical jets were taken by HST in the mid-1990s; with time baselines on the order of 20 years and state-of-the-art astrometry techniques, we are now able to reach accuracies in proper-motion measurements on the order of a tenth of a milliarcsecond per year. We present the results of a recent HST program to measure the kiloparsec-scale proper motions of eleven nearby optical jets with Hubble, the first sample of its kind. When paired with VLBI proper-motion measurements on the parsec "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1701.05846","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-01-20T16:30:31Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"cb6be3e6ba90c15a5ce62dc5284f73edb83c8128c4a04fe4e445ebe3c0e3a127","abstract_canon_sha256":"e1227338f2886995058340aa159d7b8c3004aa1efc7bae47c214e31337b72ff1"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:52:24.556696Z","signature_b64":"lJbWgqmTvbhOXI1hTVzI06E51Qr7KaYnxuHUwQaUw+PLRS4zOX6SG5NHWt0CfJdi2cYTAK8nlo2rs++aIw6dBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"83f1c92e3ac6b9a72f7c3481ef3f5703fa99a7ab3df5252eb44be296ab641621","last_reissued_at":"2026-05-18T00:52:24.555907Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:52:24.555907Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Proper Motions of Jets on the Kiloparsec Scale: New Results with HST","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Colin Norman, Eileen T. Meyer, Eric Perlman, Jay Anderson, John Biretta, Marco Chiaberge, Markos Georganopoulos, Roeland van der Marel, Sangmo T. Sohn, William B. Sparks","submitted_at":"2017-01-20T16:30:31Z","abstract_excerpt":"The Hubble Space Telescope recently celebrated 25 years of operation. Some of the first images of extragalactic optical jets were taken by HST in the mid-1990s; with time baselines on the order of 20 years and state-of-the-art astrometry techniques, we are now able to reach accuracies in proper-motion measurements on the order of a tenth of a milliarcsecond per year. We present the results of a recent HST program to measure the kiloparsec-scale proper motions of eleven nearby optical jets with Hubble, the first sample of its kind. When paired with VLBI proper-motion measurements on the parsec "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.05846","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1701.05846","created_at":"2026-05-18T00:52:24.556046+00:00"},{"alias_kind":"arxiv_version","alias_value":"1701.05846v1","created_at":"2026-05-18T00:52:24.556046+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.05846","created_at":"2026-05-18T00:52:24.556046+00:00"},{"alias_kind":"pith_short_12","alias_value":"QPY4SLR2Y242","created_at":"2026-05-18T12:31:39.905425+00:00"},{"alias_kind":"pith_short_16","alias_value":"QPY4SLR2Y242OL34","created_at":"2026-05-18T12:31:39.905425+00:00"},{"alias_kind":"pith_short_8","alias_value":"QPY4SLR2","created_at":"2026-05-18T12:31:39.905425+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/QPY4SLR2Y242OL34GSA66P2XAP","json":"https://pith.science/pith/QPY4SLR2Y242OL34GSA66P2XAP.json","graph_json":"https://pith.science/api/pith-number/QPY4SLR2Y242OL34GSA66P2XAP/graph.json","events_json":"https://pith.science/api/pith-number/QPY4SLR2Y242OL34GSA66P2XAP/events.json","paper":"https://pith.science/paper/QPY4SLR2"},"agent_actions":{"view_html":"https://pith.science/pith/QPY4SLR2Y242OL34GSA66P2XAP","download_json":"https://pith.science/pith/QPY4SLR2Y242OL34GSA66P2XAP.json","view_paper":"https://pith.science/paper/QPY4SLR2","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1701.05846&json=true","fetch_graph":"https://pith.science/api/pith-number/QPY4SLR2Y242OL34GSA66P2XAP/graph.json","fetch_events":"https://pith.science/api/pith-number/QPY4SLR2Y242OL34GSA66P2XAP/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/QPY4SLR2Y242OL34GSA66P2XAP/action/timestamp_anchor","attest_storage":"https://pith.science/pith/QPY4SLR2Y242OL34GSA66P2XAP/action/storage_attestation","attest_author":"https://pith.science/pith/QPY4SLR2Y242OL34GSA66P2XAP/action/author_attestation","sign_citation":"https://pith.science/pith/QPY4SLR2Y242OL34GSA66P2XAP/action/citation_signature","submit_replication":"https://pith.science/pith/QPY4SLR2Y242OL34GSA66P2XAP/action/replication_record"}},"created_at":"2026-05-18T00:52:24.556046+00:00","updated_at":"2026-05-18T00:52:24.556046+00:00"}