{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:PLZWNM42PNZ6BK33DMUXMIPGMG","short_pith_number":"pith:PLZWNM42","canonical_record":{"source":{"id":"2303.02745","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-03-05T18:37:13Z","cross_cats_sorted":[],"title_canon_sha256":"cd2b817838f7f35c956052e8c813e46d1101140c7ef24583ab6aa2058ef25ca1","abstract_canon_sha256":"4361c78f241f44cc8e3603e76da575d0ee19b95a7cff82cb5073cbcd97eb506f"},"schema_version":"1.0"},"canonical_sha256":"7af366b39a7b73e0ab7b1b297621e661a7da4616ae8518b26d38005612e1ea46","source":{"kind":"arxiv","id":"2303.02745","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.02745","created_at":"2026-07-05T06:20:32Z"},{"alias_kind":"arxiv_version","alias_value":"2303.02745v2","created_at":"2026-07-05T06:20:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.02745","created_at":"2026-07-05T06:20:32Z"},{"alias_kind":"pith_short_12","alias_value":"PLZWNM42PNZ6","created_at":"2026-07-05T06:20:32Z"},{"alias_kind":"pith_short_16","alias_value":"PLZWNM42PNZ6BK33","created_at":"2026-07-05T06:20:32Z"},{"alias_kind":"pith_short_8","alias_value":"PLZWNM42","created_at":"2026-07-05T06:20:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:PLZWNM42PNZ6BK33DMUXMIPGMG","target":"record","payload":{"canonical_record":{"source":{"id":"2303.02745","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-03-05T18:37:13Z","cross_cats_sorted":[],"title_canon_sha256":"cd2b817838f7f35c956052e8c813e46d1101140c7ef24583ab6aa2058ef25ca1","abstract_canon_sha256":"4361c78f241f44cc8e3603e76da575d0ee19b95a7cff82cb5073cbcd97eb506f"},"schema_version":"1.0"},"canonical_sha256":"7af366b39a7b73e0ab7b1b297621e661a7da4616ae8518b26d38005612e1ea46","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:20:32.110310Z","signature_b64":"hIZhjwJlMxrPP5kX6tMZK1/GBgiNKQ3PprlQpd0KUF16n8w1pASv/O2o/KmHOtcd14jAnLgb8nxnFM62bK+tBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7af366b39a7b73e0ab7b1b297621e661a7da4616ae8518b26d38005612e1ea46","last_reissued_at":"2026-07-05T06:20:32.109895Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:20:32.109895Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2303.02745","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T06:20:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w2jSoChVR4FKHHFjWe7XRUyyDkEisd7SDobQFPrjBbBBZZIvhfKrVjFcCJTvaocI8SkhnM4aVx0M5r6ZpOolAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T06:46:50.016618Z"},"content_sha256":"59a1a5a486dfb396986ffadc7e525f44d628e58b19ebf7ce964dc02532bfa36e","schema_version":"1.0","event_id":"sha256:59a1a5a486dfb396986ffadc7e525f44d628e58b19ebf7ce964dc02532bfa36e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:PLZWNM42PNZ6BK33DMUXMIPGMG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Detection of X-ray polarized emission and accretion-disk winds with IXPE and NICER in the black-hole X-ray binary 4U 1630-47","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Akash Garg, Divya Rawat, Mariano M\\'endez","submitted_at":"2023-03-05T18:37:13Z","abstract_excerpt":"We detect a high level of polarization in the X-ray emission of the black-hole binary 4U 1630-47 in an observation with the Imaging X-ray Polarimetry Explorer. The 2-8 keV polarization degree is 8 % at a position angle of $18^\\circ$, with the polarization degree increasing significantly with energy, from ~6 % at ~2 keV to ~ 11 % at ~8 keV. The continuum emission in the spectrum of simultaneous observations with the Neutron Star Interior Composition Explorer, NICER, is well described with only a thermal disc spectrum, with stringent upper limits to any Comptonized emission from the corona. Toge"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.02745","kind":"arxiv","version":2},"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/2303.02745/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":"2026-07-05T06:20:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Pj48rVUfAQB2O3dcq/S+dsgeFkYJK0n/dHfY+RUBROUsMuDuz0TJajFBcOO0/0kIb5Mrn3d9/028U6e8vZMaBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T06:46:50.017143Z"},"content_sha256":"50b592ebc4ce9d8184e95eb64807998183adeeff0297d37e2dfe44146d55ca0f","schema_version":"1.0","event_id":"sha256:50b592ebc4ce9d8184e95eb64807998183adeeff0297d37e2dfe44146d55ca0f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PLZWNM42PNZ6BK33DMUXMIPGMG/bundle.json","state_url":"https://pith.science/pith/PLZWNM42PNZ6BK33DMUXMIPGMG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PLZWNM42PNZ6BK33DMUXMIPGMG/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":"2026-08-12T06:46:50Z","links":{"resolver":"https://pith.science/pith/PLZWNM42PNZ6BK33DMUXMIPGMG","bundle":"https://pith.science/pith/PLZWNM42PNZ6BK33DMUXMIPGMG/bundle.json","state":"https://pith.science/pith/PLZWNM42PNZ6BK33DMUXMIPGMG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PLZWNM42PNZ6BK33DMUXMIPGMG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:PLZWNM42PNZ6BK33DMUXMIPGMG","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":"4361c78f241f44cc8e3603e76da575d0ee19b95a7cff82cb5073cbcd97eb506f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-03-05T18:37:13Z","title_canon_sha256":"cd2b817838f7f35c956052e8c813e46d1101140c7ef24583ab6aa2058ef25ca1"},"schema_version":"1.0","source":{"id":"2303.02745","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.02745","created_at":"2026-07-05T06:20:32Z"},{"alias_kind":"arxiv_version","alias_value":"2303.02745v2","created_at":"2026-07-05T06:20:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.02745","created_at":"2026-07-05T06:20:32Z"},{"alias_kind":"pith_short_12","alias_value":"PLZWNM42PNZ6","created_at":"2026-07-05T06:20:32Z"},{"alias_kind":"pith_short_16","alias_value":"PLZWNM42PNZ6BK33","created_at":"2026-07-05T06:20:32Z"},{"alias_kind":"pith_short_8","alias_value":"PLZWNM42","created_at":"2026-07-05T06:20:32Z"}],"graph_snapshots":[{"event_id":"sha256:50b592ebc4ce9d8184e95eb64807998183adeeff0297d37e2dfe44146d55ca0f","target":"graph","created_at":"2026-07-05T06:20:32Z","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/2303.02745/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We detect a high level of polarization in the X-ray emission of the black-hole binary 4U 1630-47 in an observation with the Imaging X-ray Polarimetry Explorer. The 2-8 keV polarization degree is 8 % at a position angle of $18^\\circ$, with the polarization degree increasing significantly with energy, from ~6 % at ~2 keV to ~ 11 % at ~8 keV. The continuum emission in the spectrum of simultaneous observations with the Neutron Star Interior Composition Explorer, NICER, is well described with only a thermal disc spectrum, with stringent upper limits to any Comptonized emission from the corona. Toge","authors_text":"Akash Garg, Divya Rawat, Mariano M\\'endez","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-03-05T18:37:13Z","title":"Detection of X-ray polarized emission and accretion-disk winds with IXPE and NICER in the black-hole X-ray binary 4U 1630-47"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.02745","kind":"arxiv","version":2},"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":"sha256:59a1a5a486dfb396986ffadc7e525f44d628e58b19ebf7ce964dc02532bfa36e","target":"record","created_at":"2026-07-05T06:20:32Z","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":"4361c78f241f44cc8e3603e76da575d0ee19b95a7cff82cb5073cbcd97eb506f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-03-05T18:37:13Z","title_canon_sha256":"cd2b817838f7f35c956052e8c813e46d1101140c7ef24583ab6aa2058ef25ca1"},"schema_version":"1.0","source":{"id":"2303.02745","kind":"arxiv","version":2}},"canonical_sha256":"7af366b39a7b73e0ab7b1b297621e661a7da4616ae8518b26d38005612e1ea46","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7af366b39a7b73e0ab7b1b297621e661a7da4616ae8518b26d38005612e1ea46","first_computed_at":"2026-07-05T06:20:32.109895Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:20:32.109895Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hIZhjwJlMxrPP5kX6tMZK1/GBgiNKQ3PprlQpd0KUF16n8w1pASv/O2o/KmHOtcd14jAnLgb8nxnFM62bK+tBw==","signature_status":"signed_v1","signed_at":"2026-07-05T06:20:32.110310Z","signed_message":"canonical_sha256_bytes"},"source_id":"2303.02745","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:59a1a5a486dfb396986ffadc7e525f44d628e58b19ebf7ce964dc02532bfa36e","sha256:50b592ebc4ce9d8184e95eb64807998183adeeff0297d37e2dfe44146d55ca0f"],"state_sha256":"bd67cc73c38f5e85a656cf6b2e296a35c4dd817bb2dce2b15d32de0e65386de5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IC83sQaS2a8Zf9FSU4Ilru3GflbmJ/QlQrMpDnI3fJHeKKcAvndqDBhLhjDvAaKF470HOf6FoMy/89lo7pzTDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T06:46:50.022158Z","bundle_sha256":"4e60027968364250ff30d2928f4752b093870e43c7605f45a2470d5a4d1d26d3"}}