{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:PLAFOL2H4HIGOOEQXZ2I5FAOAW","short_pith_number":"pith:PLAFOL2H","canonical_record":{"source":{"id":"2404.19601","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-04-30T14:51:41Z","cross_cats_sorted":[],"title_canon_sha256":"f2bb5926763972dae7d56332a455c618712312466dda75bc94a1aa5d1ea27d20","abstract_canon_sha256":"581a108e25b872a2a6e510f7b5afb4228524c4cf3792828b3d111fdfd70f3d43"},"schema_version":"1.0"},"canonical_sha256":"7ac0572f47e1d0673890be748e940e0590ed05f9bdd8a798568ac24dad4a3792","source":{"kind":"arxiv","id":"2404.19601","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2404.19601","created_at":"2026-07-05T12:06:58Z"},{"alias_kind":"arxiv_version","alias_value":"2404.19601v3","created_at":"2026-07-05T12:06:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2404.19601","created_at":"2026-07-05T12:06:58Z"},{"alias_kind":"pith_short_12","alias_value":"PLAFOL2H4HIG","created_at":"2026-07-05T12:06:58Z"},{"alias_kind":"pith_short_16","alias_value":"PLAFOL2H4HIGOOEQ","created_at":"2026-07-05T12:06:58Z"},{"alias_kind":"pith_short_8","alias_value":"PLAFOL2H","created_at":"2026-07-05T12:06:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:PLAFOL2H4HIGOOEQXZ2I5FAOAW","target":"record","payload":{"canonical_record":{"source":{"id":"2404.19601","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-04-30T14:51:41Z","cross_cats_sorted":[],"title_canon_sha256":"f2bb5926763972dae7d56332a455c618712312466dda75bc94a1aa5d1ea27d20","abstract_canon_sha256":"581a108e25b872a2a6e510f7b5afb4228524c4cf3792828b3d111fdfd70f3d43"},"schema_version":"1.0"},"canonical_sha256":"7ac0572f47e1d0673890be748e940e0590ed05f9bdd8a798568ac24dad4a3792","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T12:06:58.984900Z","signature_b64":"gq42K8RAWwOOaU68pZQxK6y1VsxixNiduE8kRyhI4+hSIu9gNDy5nYRsQbVsmDypJyfjE1ALKCUF/2ymK/aiDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7ac0572f47e1d0673890be748e940e0590ed05f9bdd8a798568ac24dad4a3792","last_reissued_at":"2026-07-05T12:06:58.984334Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T12:06:58.984334Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2404.19601","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T12:06:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QP6ADTiSrUSshJE/Evet+ymv4LlNFN11Wf6P6WSlkyTO4i4Il7gZ9rcrS5pMsHBoEymz7pnZPsYlc3DUH3sMCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T21:34:13.155559Z"},"content_sha256":"5dc34c6058bb656fcdc82e93aaa79e5df47d5e6963b7d76edd3cd65c8e707546","schema_version":"1.0","event_id":"sha256:5dc34c6058bb656fcdc82e93aaa79e5df47d5e6963b7d76edd3cd65c8e707546"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:PLAFOL2H4HIGOOEQXZ2I5FAOAW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Recovery of the X-ray polarisation of Swift J1727.8$-$1613 after the soft-to-hard spectral transition","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Ingram, A. Ratheesh, A. Veledina, E. Egron, E. Nathan, F. Capitanio, F. Muleri, F. Tombesi, G. Mastroserio, G. Matt, H. Krawczynski, J. A. Garc\\'ia, J. F. Steiner, J. Podgorn\\'y, J. Poutanen, J. Svoboda, K. Hu, L. Marra, M. Brigitte, M. Dov\\v{c}iak, M. Negro, M. N. Iacolina, N. Bollemeijer, N. Castro Segura, N. Rodriguez Cavero, P. Kaaret, P.-O. Petrucci, R. Emami, R. Taverna, S. Bianchi, S. R. Datta, T. D. Russell, T. Mu\\~noz-Darias, V. Kravtsov, W. Zhang, Y. J. Yang, Y. Zhang","submitted_at":"2024-04-30T14:51:41Z","abstract_excerpt":"We report on the detection of X-ray polarisation in the black-hole X-ray binary Swift J1727.8$-$1613 during its dim hard spectral state by the Imaging X-ray Polarimetry Explorer (IXPE). This is the first detection of X-ray polarisation at the transition from the soft to the hard state in an X-ray binary. We find an averaged 2$-$8 keV polarisation degree of (3.3 ${\\pm}$ 0.4) % and a corresponding polarisation angle of 3{\\deg} ${\\pm}$ 4{\\deg}, which matches the polarisation detected during the rising stage of the outburst, in September$-$October 2023, within 1${\\sigma}$ uncertainty. The observat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2404.19601","kind":"arxiv","version":3},"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/2404.19601/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":"2026-07-05T12:06:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dKYzsCLZhMBZn19hmVptjMj3J5qnQxiwhjn9/yGY1PEZGerY0Iep7Jwd+OE2ev/9Xo5V1iaCcxU59BgJPyqxCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T21:34:13.156133Z"},"content_sha256":"758cce5bb7d4e6523d6ac0415e63bf5f9dc09e4a38b4770e4430c7f04d13cdc5","schema_version":"1.0","event_id":"sha256:758cce5bb7d4e6523d6ac0415e63bf5f9dc09e4a38b4770e4430c7f04d13cdc5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PLAFOL2H4HIGOOEQXZ2I5FAOAW/bundle.json","state_url":"https://pith.science/pith/PLAFOL2H4HIGOOEQXZ2I5FAOAW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PLAFOL2H4HIGOOEQXZ2I5FAOAW/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":"2026-08-10T21:34:13Z","links":{"resolver":"https://pith.science/pith/PLAFOL2H4HIGOOEQXZ2I5FAOAW","bundle":"https://pith.science/pith/PLAFOL2H4HIGOOEQXZ2I5FAOAW/bundle.json","state":"https://pith.science/pith/PLAFOL2H4HIGOOEQXZ2I5FAOAW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PLAFOL2H4HIGOOEQXZ2I5FAOAW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:PLAFOL2H4HIGOOEQXZ2I5FAOAW","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":"581a108e25b872a2a6e510f7b5afb4228524c4cf3792828b3d111fdfd70f3d43","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-04-30T14:51:41Z","title_canon_sha256":"f2bb5926763972dae7d56332a455c618712312466dda75bc94a1aa5d1ea27d20"},"schema_version":"1.0","source":{"id":"2404.19601","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2404.19601","created_at":"2026-07-05T12:06:58Z"},{"alias_kind":"arxiv_version","alias_value":"2404.19601v3","created_at":"2026-07-05T12:06:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2404.19601","created_at":"2026-07-05T12:06:58Z"},{"alias_kind":"pith_short_12","alias_value":"PLAFOL2H4HIG","created_at":"2026-07-05T12:06:58Z"},{"alias_kind":"pith_short_16","alias_value":"PLAFOL2H4HIGOOEQ","created_at":"2026-07-05T12:06:58Z"},{"alias_kind":"pith_short_8","alias_value":"PLAFOL2H","created_at":"2026-07-05T12:06:58Z"}],"graph_snapshots":[{"event_id":"sha256:758cce5bb7d4e6523d6ac0415e63bf5f9dc09e4a38b4770e4430c7f04d13cdc5","target":"graph","created_at":"2026-07-05T12:06:58Z","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/2404.19601/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report on the detection of X-ray polarisation in the black-hole X-ray binary Swift J1727.8$-$1613 during its dim hard spectral state by the Imaging X-ray Polarimetry Explorer (IXPE). This is the first detection of X-ray polarisation at the transition from the soft to the hard state in an X-ray binary. We find an averaged 2$-$8 keV polarisation degree of (3.3 ${\\pm}$ 0.4) % and a corresponding polarisation angle of 3{\\deg} ${\\pm}$ 4{\\deg}, which matches the polarisation detected during the rising stage of the outburst, in September$-$October 2023, within 1${\\sigma}$ uncertainty. The observat","authors_text":"A. Ingram, A. Ratheesh, A. Veledina, E. Egron, E. Nathan, F. Capitanio, F. Muleri, F. Tombesi, G. Mastroserio, G. Matt, H. Krawczynski, J. A. Garc\\'ia, J. F. Steiner, J. Podgorn\\'y, J. Poutanen, J. Svoboda, K. Hu, L. Marra, M. Brigitte, M. Dov\\v{c}iak, M. Negro, M. N. Iacolina, N. Bollemeijer, N. Castro Segura, N. Rodriguez Cavero, P. Kaaret, P.-O. Petrucci, R. Emami, R. Taverna, S. Bianchi, S. R. Datta, T. D. Russell, T. Mu\\~noz-Darias, V. Kravtsov, W. Zhang, Y. J. Yang, Y. Zhang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-04-30T14:51:41Z","title":"Recovery of the X-ray polarisation of Swift J1727.8$-$1613 after the soft-to-hard spectral transition"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2404.19601","kind":"arxiv","version":3},"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":"sha256:5dc34c6058bb656fcdc82e93aaa79e5df47d5e6963b7d76edd3cd65c8e707546","target":"record","created_at":"2026-07-05T12:06:58Z","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":"581a108e25b872a2a6e510f7b5afb4228524c4cf3792828b3d111fdfd70f3d43","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-04-30T14:51:41Z","title_canon_sha256":"f2bb5926763972dae7d56332a455c618712312466dda75bc94a1aa5d1ea27d20"},"schema_version":"1.0","source":{"id":"2404.19601","kind":"arxiv","version":3}},"canonical_sha256":"7ac0572f47e1d0673890be748e940e0590ed05f9bdd8a798568ac24dad4a3792","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7ac0572f47e1d0673890be748e940e0590ed05f9bdd8a798568ac24dad4a3792","first_computed_at":"2026-07-05T12:06:58.984334Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T12:06:58.984334Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gq42K8RAWwOOaU68pZQxK6y1VsxixNiduE8kRyhI4+hSIu9gNDy5nYRsQbVsmDypJyfjE1ALKCUF/2ymK/aiDg==","signature_status":"signed_v1","signed_at":"2026-07-05T12:06:58.984900Z","signed_message":"canonical_sha256_bytes"},"source_id":"2404.19601","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5dc34c6058bb656fcdc82e93aaa79e5df47d5e6963b7d76edd3cd65c8e707546","sha256:758cce5bb7d4e6523d6ac0415e63bf5f9dc09e4a38b4770e4430c7f04d13cdc5"],"state_sha256":"b6f4b21ba138e6f7a472f063a4fc2ddb9a8a479a15fbaba56e99104064bdb1ab"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sG5F2Y6+0da68tEvg25Kya2OgyviYbVEo6CZxY1qNsyeFa2nBp0e/lbaiJ6EnxWoweF/1+3EVZ3dqg+jKduqCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T21:34:13.160386Z","bundle_sha256":"1a767411d4267be639886b2892f04736e67795a2a72b0c016875a32777bfb735"}}