{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:JKW5R2SZAQATCDHMBB5UEYXMUB","short_pith_number":"pith:JKW5R2SZ","canonical_record":{"source":{"id":"2208.12862","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-08-26T20:40:10Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"beac78fd7f3e4a0a4e48b1b05512935e1946a393f02e45abc30e47adcf0160af","abstract_canon_sha256":"820797f1a9564d8cda74f3c026987045c513875a43b52209c9c5deaa389c82b5"},"schema_version":"1.0"},"canonical_sha256":"4aadd8ea590401310cec087b4262eca04be0daa9b1eabc4621da15aa39f0f813","source":{"kind":"arxiv","id":"2208.12862","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2208.12862","created_at":"2026-07-05T04:51:59Z"},{"alias_kind":"arxiv_version","alias_value":"2208.12862v1","created_at":"2026-07-05T04:51:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2208.12862","created_at":"2026-07-05T04:51:59Z"},{"alias_kind":"pith_short_12","alias_value":"JKW5R2SZAQAT","created_at":"2026-07-05T04:51:59Z"},{"alias_kind":"pith_short_16","alias_value":"JKW5R2SZAQATCDHM","created_at":"2026-07-05T04:51:59Z"},{"alias_kind":"pith_short_8","alias_value":"JKW5R2SZ","created_at":"2026-07-05T04:51:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:JKW5R2SZAQATCDHMBB5UEYXMUB","target":"record","payload":{"canonical_record":{"source":{"id":"2208.12862","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-08-26T20:40:10Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"beac78fd7f3e4a0a4e48b1b05512935e1946a393f02e45abc30e47adcf0160af","abstract_canon_sha256":"820797f1a9564d8cda74f3c026987045c513875a43b52209c9c5deaa389c82b5"},"schema_version":"1.0"},"canonical_sha256":"4aadd8ea590401310cec087b4262eca04be0daa9b1eabc4621da15aa39f0f813","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:51:59.966616Z","signature_b64":"BMc8hUoPR2nhWIDlyrkvZ7qgk64TWeyOMhUq8VWnfgg2KNsVHVgKcxi3TN9TGLIkqKfnkBs70xExXoH1uT0jCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4aadd8ea590401310cec087b4262eca04be0daa9b1eabc4621da15aa39f0f813","last_reissued_at":"2026-07-05T04:51:59.966136Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:51:59.966136Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2208.12862","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":"2026-07-05T04:51:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XL0L5Q/n1OKPg0VyRX5r3/Prw6b7wLFVFwC23ZrXoxdSAz6u1OOSvhJS/2dEPX8RU8JFhY4Zg4oYKVM7Mq5PBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T13:51:04.516237Z"},"content_sha256":"3c9c05baa6009e277224e441329f077f349f884b8475a5f95c1783dba7138c6f","schema_version":"1.0","event_id":"sha256:3c9c05baa6009e277224e441329f077f349f884b8475a5f95c1783dba7138c6f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:JKW5R2SZAQATCDHMBB5UEYXMUB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spectropolarimetry of the Thermonuclear Supernova 2021rhu: High Calcium Polarization 79 Days After Peak Luminosity","license":"http://creativecommons.org/licenses/by-sa/4.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"(10) UCLA, (11) Virginia Tech, (12) ICE-CSIC, (13) Konkoly Observatory, 14, (14) E\\\"otv\\\"os Lor\\'and University, 15) ((1) UC Berkeley, (15) University of Szeged), (2) DESY, 3), (3) University of Potsdam, (4) Texas A&M University, (5) UT Austin, 6), (6) ESO, (7) University of Sheffield, (8) Florida State University, (9) Yale, Aleksandar Cikota (6), Alexei V. Filippenko (1), Chris Ashall (11), Dakotah B. Tyler (10), Dietrich Baade (6), Divya Mishra (4, Ferdinando Patat (6), Howard Isaacson (1), Huirong Yan (2, J. Craig Wheeler (5), Jozsef Vink\\'o (13, Justyn R. Maund (7), Kishore C. Patra (1), Lifan Wang (4), Ll\\'ius Galbany (12), Malena Rice (9), Melissa Shahbandeh (8), Peter Hoeflich (8), Sergiy S. Vasylyev (1), Steven Giacalone (1), Thomas G. Brink (1), Yi Yang (1)","submitted_at":"2022-08-26T20:40:10Z","abstract_excerpt":"We report spectropolarimetric observations of the Type Ia supernova (SN) 2021rhu at four epochs: $-$7, +0, +36, and +79 days relative to its $B$-band maximum luminosity. A wavelength-dependent continuum polarization peaking at $3890 \\pm 93$ Angstroms and reaching a level of $p_{\\rm max}=1.78% \\pm 0.02$% was found. The peak of the polarization curve is bluer than is typical in the Milky Way, indicating a larger proportion of small dust grains along the sightline to the SN. After removing the interstellar polarization, we found a pronounced increase of the polarization in the CaII near-infrared "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2208.12862","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/2208.12862/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T04:51:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B6LTRx442xjFSdcsD9WeXxeq/yJBMuww//kzi991BIDTUMrr114JswyXzHozYoy3xdmbW2BQvT5wvcZPkL22DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T13:51:04.517164Z"},"content_sha256":"4fb9b87b684887bf31f71bff1aea2a15042bb708ecf7e19c69e1fa8fb3dbc977","schema_version":"1.0","event_id":"sha256:4fb9b87b684887bf31f71bff1aea2a15042bb708ecf7e19c69e1fa8fb3dbc977"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JKW5R2SZAQATCDHMBB5UEYXMUB/bundle.json","state_url":"https://pith.science/pith/JKW5R2SZAQATCDHMBB5UEYXMUB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JKW5R2SZAQATCDHMBB5UEYXMUB/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":"2026-08-06T13:51:04Z","links":{"resolver":"https://pith.science/pith/JKW5R2SZAQATCDHMBB5UEYXMUB","bundle":"https://pith.science/pith/JKW5R2SZAQATCDHMBB5UEYXMUB/bundle.json","state":"https://pith.science/pith/JKW5R2SZAQATCDHMBB5UEYXMUB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JKW5R2SZAQATCDHMBB5UEYXMUB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:JKW5R2SZAQATCDHMBB5UEYXMUB","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":"820797f1a9564d8cda74f3c026987045c513875a43b52209c9c5deaa389c82b5","cross_cats_sorted":["astro-ph.SR"],"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-08-26T20:40:10Z","title_canon_sha256":"beac78fd7f3e4a0a4e48b1b05512935e1946a393f02e45abc30e47adcf0160af"},"schema_version":"1.0","source":{"id":"2208.12862","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2208.12862","created_at":"2026-07-05T04:51:59Z"},{"alias_kind":"arxiv_version","alias_value":"2208.12862v1","created_at":"2026-07-05T04:51:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2208.12862","created_at":"2026-07-05T04:51:59Z"},{"alias_kind":"pith_short_12","alias_value":"JKW5R2SZAQAT","created_at":"2026-07-05T04:51:59Z"},{"alias_kind":"pith_short_16","alias_value":"JKW5R2SZAQATCDHM","created_at":"2026-07-05T04:51:59Z"},{"alias_kind":"pith_short_8","alias_value":"JKW5R2SZ","created_at":"2026-07-05T04:51:59Z"}],"graph_snapshots":[{"event_id":"sha256:4fb9b87b684887bf31f71bff1aea2a15042bb708ecf7e19c69e1fa8fb3dbc977","target":"graph","created_at":"2026-07-05T04:51:59Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2208.12862/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report spectropolarimetric observations of the Type Ia supernova (SN) 2021rhu at four epochs: $-$7, +0, +36, and +79 days relative to its $B$-band maximum luminosity. A wavelength-dependent continuum polarization peaking at $3890 \\pm 93$ Angstroms and reaching a level of $p_{\\rm max}=1.78% \\pm 0.02$% was found. The peak of the polarization curve is bluer than is typical in the Milky Way, indicating a larger proportion of small dust grains along the sightline to the SN. After removing the interstellar polarization, we found a pronounced increase of the polarization in the CaII near-infrared ","authors_text":"(10) UCLA, (11) Virginia Tech, (12) ICE-CSIC, (13) Konkoly Observatory, 14, (14) E\\\"otv\\\"os Lor\\'and University, 15) ((1) UC Berkeley, (15) University of Szeged), (2) DESY, 3), (3) University of Potsdam, (4) Texas A&M University, (5) UT Austin, 6), (6) ESO, (7) University of Sheffield, (8) Florida State University, (9) Yale, Aleksandar Cikota (6), Alexei V. Filippenko (1), Chris Ashall (11), Dakotah B. Tyler (10), Dietrich Baade (6), Divya Mishra (4, Ferdinando Patat (6), Howard Isaacson (1), Huirong Yan (2, J. Craig Wheeler (5), Jozsef Vink\\'o (13, Justyn R. Maund (7), Kishore C. Patra (1), Lifan Wang (4), Ll\\'ius Galbany (12), Malena Rice (9), Melissa Shahbandeh (8), Peter Hoeflich (8), Sergiy S. Vasylyev (1), Steven Giacalone (1), Thomas G. Brink (1), Yi Yang (1)","cross_cats":["astro-ph.SR"],"headline":"","license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-08-26T20:40:10Z","title":"Spectropolarimetry of the Thermonuclear Supernova 2021rhu: High Calcium Polarization 79 Days After Peak Luminosity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2208.12862","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":"sha256:3c9c05baa6009e277224e441329f077f349f884b8475a5f95c1783dba7138c6f","target":"record","created_at":"2026-07-05T04:51:59Z","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":"820797f1a9564d8cda74f3c026987045c513875a43b52209c9c5deaa389c82b5","cross_cats_sorted":["astro-ph.SR"],"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-08-26T20:40:10Z","title_canon_sha256":"beac78fd7f3e4a0a4e48b1b05512935e1946a393f02e45abc30e47adcf0160af"},"schema_version":"1.0","source":{"id":"2208.12862","kind":"arxiv","version":1}},"canonical_sha256":"4aadd8ea590401310cec087b4262eca04be0daa9b1eabc4621da15aa39f0f813","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4aadd8ea590401310cec087b4262eca04be0daa9b1eabc4621da15aa39f0f813","first_computed_at":"2026-07-05T04:51:59.966136Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:51:59.966136Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BMc8hUoPR2nhWIDlyrkvZ7qgk64TWeyOMhUq8VWnfgg2KNsVHVgKcxi3TN9TGLIkqKfnkBs70xExXoH1uT0jCw==","signature_status":"signed_v1","signed_at":"2026-07-05T04:51:59.966616Z","signed_message":"canonical_sha256_bytes"},"source_id":"2208.12862","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3c9c05baa6009e277224e441329f077f349f884b8475a5f95c1783dba7138c6f","sha256:4fb9b87b684887bf31f71bff1aea2a15042bb708ecf7e19c69e1fa8fb3dbc977"],"state_sha256":"66bd7a2b3595b6989a9053ebb20e16da0b1a47ca45d50ecb4a97fa70c6bb3a5a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"E8vkFe7niVS8GjtsJD43jKLo4hk1Sb7IxGi1MeVMR3YbyT+OQlkxTlhnPaP9dPnbXB8M2kcevKOypCptAn/9BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T13:51:04.522261Z","bundle_sha256":"f63c0cfe73d0415b9a5b751b91c8c1b3eb4f1acd3731a68a82eeed5af93784af"}}