{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:H6EEJPA3V4VMYEB4F4COYS5D3W","short_pith_number":"pith:H6EEJPA3","schema_version":"1.0","canonical_sha256":"3f8844bc1baf2acc103c2f04ec4ba3dd8a55df9de319b73b316d3c476f041ba1","source":{"kind":"arxiv","id":"1911.02123","version":1},"attestation_state":"computed","paper":{"title":"HIPPI-2: A Versatile High Precision Polarimeter","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.IM","authors_text":"Ain De Horta, Daniel V. Cotton, Darren Maybour, Jeremy Bailey, Lucyna Kedziora-Chudczer","submitted_at":"2019-11-05T22:51:01Z","abstract_excerpt":"We describe the High-Precision Polarimetric Instrument-2 (HIPPI-2) a highly versatile stellar polarimeter developed at the University of New South Wales (UNSW). Two copies of HIPPI-2 have been built and used on the 60-cm telescope at Western Sydney University's (WSU) Penrith Observatory, the 8.1-m Gemini North Telescope at Mauna Kea and extensively on the 3.9-m Anglo-Australian Telescope (AAT). The precision of polarimetry, measured from repeat observations of bright stars in the SDSS g' band, is better than 3.5 ppm (parts per million) on the 3.9-m AAT and better than 11 ppm on the 60-cm WSU t"},"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":"1911.02123","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-11-05T22:51:01Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"4cb780c6ee4ec208f3d8b609b169d8650b56b6c2ed2f6d5c41e4d0d81a21c0e3","abstract_canon_sha256":"fb5dc202cf53dc80c08a2a22b7f8a8d50dfbdc08cf5ab9cb81aa31979ed3d742"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:36:41.828310Z","signature_b64":"ZTBWnPllfoNQW2Jf8DclNtAnUqG31YUAozGHbbGL2cDO+NCb6FSxtNkgMwzA0UKNMPp9UwelgKYm/DNmrZZiCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3f8844bc1baf2acc103c2f04ec4ba3dd8a55df9de319b73b316d3c476f041ba1","last_reissued_at":"2026-07-05T00:36:41.827849Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:36:41.827849Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"HIPPI-2: A Versatile High Precision Polarimeter","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.IM","authors_text":"Ain De Horta, Daniel V. Cotton, Darren Maybour, Jeremy Bailey, Lucyna Kedziora-Chudczer","submitted_at":"2019-11-05T22:51:01Z","abstract_excerpt":"We describe the High-Precision Polarimetric Instrument-2 (HIPPI-2) a highly versatile stellar polarimeter developed at the University of New South Wales (UNSW). Two copies of HIPPI-2 have been built and used on the 60-cm telescope at Western Sydney University's (WSU) Penrith Observatory, the 8.1-m Gemini North Telescope at Mauna Kea and extensively on the 3.9-m Anglo-Australian Telescope (AAT). The precision of polarimetry, measured from repeat observations of bright stars in the SDSS g' band, is better than 3.5 ppm (parts per million) on the 3.9-m AAT and better than 11 ppm on the 60-cm WSU t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.02123","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1911.02123/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"1911.02123","created_at":"2026-07-05T00:36:41.827902+00:00"},{"alias_kind":"arxiv_version","alias_value":"1911.02123v1","created_at":"2026-07-05T00:36:41.827902+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.02123","created_at":"2026-07-05T00:36:41.827902+00:00"},{"alias_kind":"pith_short_12","alias_value":"H6EEJPA3V4VM","created_at":"2026-07-05T00:36:41.827902+00:00"},{"alias_kind":"pith_short_16","alias_value":"H6EEJPA3V4VMYEB4","created_at":"2026-07-05T00:36:41.827902+00:00"},{"alias_kind":"pith_short_8","alias_value":"H6EEJPA3","created_at":"2026-07-05T00:36:41.827902+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/H6EEJPA3V4VMYEB4F4COYS5D3W","json":"https://pith.science/pith/H6EEJPA3V4VMYEB4F4COYS5D3W.json","graph_json":"https://pith.science/api/pith-number/H6EEJPA3V4VMYEB4F4COYS5D3W/graph.json","events_json":"https://pith.science/api/pith-number/H6EEJPA3V4VMYEB4F4COYS5D3W/events.json","paper":"https://pith.science/paper/H6EEJPA3"},"agent_actions":{"view_html":"https://pith.science/pith/H6EEJPA3V4VMYEB4F4COYS5D3W","download_json":"https://pith.science/pith/H6EEJPA3V4VMYEB4F4COYS5D3W.json","view_paper":"https://pith.science/paper/H6EEJPA3","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1911.02123&json=true","fetch_graph":"https://pith.science/api/pith-number/H6EEJPA3V4VMYEB4F4COYS5D3W/graph.json","fetch_events":"https://pith.science/api/pith-number/H6EEJPA3V4VMYEB4F4COYS5D3W/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/H6EEJPA3V4VMYEB4F4COYS5D3W/action/timestamp_anchor","attest_storage":"https://pith.science/pith/H6EEJPA3V4VMYEB4F4COYS5D3W/action/storage_attestation","attest_author":"https://pith.science/pith/H6EEJPA3V4VMYEB4F4COYS5D3W/action/author_attestation","sign_citation":"https://pith.science/pith/H6EEJPA3V4VMYEB4F4COYS5D3W/action/citation_signature","submit_replication":"https://pith.science/pith/H6EEJPA3V4VMYEB4F4COYS5D3W/action/replication_record"}},"created_at":"2026-07-05T00:36:41.827902+00:00","updated_at":"2026-07-05T00:36:41.827902+00:00"}