{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:2WEOH4HT6TSFMA7ISA46PU6VF6","short_pith_number":"pith:2WEOH4HT","canonical_record":{"source":{"id":"2012.01112","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-12-02T12:02:00Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"95427e0b00ce9b36de4665bd113f0c770f1b51b1fa4f3f841d6611733aa5415f","abstract_canon_sha256":"5ac62ec1864f3bb501de24266a5b8a573b07f20288281e7957256c097c79e49d"},"schema_version":"1.0"},"canonical_sha256":"d588e3f0f3f4e45603e89039e7d3d52f95b2a9dd532e68955e5caa78eb6726bd","source":{"kind":"arxiv","id":"2012.01112","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.01112","created_at":"2026-07-05T02:10:41Z"},{"alias_kind":"arxiv_version","alias_value":"2012.01112v2","created_at":"2026-07-05T02:10:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.01112","created_at":"2026-07-05T02:10:41Z"},{"alias_kind":"pith_short_12","alias_value":"2WEOH4HT6TSF","created_at":"2026-07-05T02:10:41Z"},{"alias_kind":"pith_short_16","alias_value":"2WEOH4HT6TSFMA7I","created_at":"2026-07-05T02:10:41Z"},{"alias_kind":"pith_short_8","alias_value":"2WEOH4HT","created_at":"2026-07-05T02:10:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:2WEOH4HT6TSFMA7ISA46PU6VF6","target":"record","payload":{"canonical_record":{"source":{"id":"2012.01112","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-12-02T12:02:00Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"95427e0b00ce9b36de4665bd113f0c770f1b51b1fa4f3f841d6611733aa5415f","abstract_canon_sha256":"5ac62ec1864f3bb501de24266a5b8a573b07f20288281e7957256c097c79e49d"},"schema_version":"1.0"},"canonical_sha256":"d588e3f0f3f4e45603e89039e7d3d52f95b2a9dd532e68955e5caa78eb6726bd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:10:41.250263Z","signature_b64":"+0yf4auQL5wkZev2iOEK4EpAmiFelCT9WBcgKdciwxmToTDPp/XPCjZcXX3SpXnNZ9c60mqSDzsZ/KVrv8ccAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d588e3f0f3f4e45603e89039e7d3d52f95b2a9dd532e68955e5caa78eb6726bd","last_reissued_at":"2026-07-05T02:10:41.249842Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:10:41.249842Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2012.01112","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":"2026-07-05T02:10:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IZoEsh/9dH5lF2OiWYxQNjyiqlnBj0EfaEZkebi2phOLchywKl3GRPLK9FgaRwcbso6++EDxIqjaqUuP09WnAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T12:39:24.644896Z"},"content_sha256":"f9ce90ac5f1616efea7a5b5684ffd09bdb7f46346ae135a74877d7b7b8e6ea5f","schema_version":"1.0","event_id":"sha256:f9ce90ac5f1616efea7a5b5684ffd09bdb7f46346ae135a74877d7b7b8e6ea5f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:2WEOH4HT6TSFMA7ISA46PU6VF6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Probing the near-horizon region of Cygnus X-1 with Suzaku and NuSTAR","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.HE","authors_text":"Askar B. Abdikamalov, Cosimo Bambi, Dimitry Ayzenberg, Honghui Liu, Menglei Zhou, Zuobin Zhang","submitted_at":"2020-12-02T12:02:00Z","abstract_excerpt":"Astrophysical black holes are ideal laboratories for testing Einstein's theory of general relativity in the strong field regime. In this manuscript, we present an analysis of Suzaku and NuSTAR spectra of the black hole binary Cygnus X-1 using RELXILL_NK. Unlike our previous study on Cygnus X-1 with NuSTAR data, here we are able to constrain the Johannsen deformation parameter $\\alpha_{13}$. However, despite the high energy resolution near the iron line provided by Suzaku, our constraints on the Kerr metric from Cygnus X-1 are not very stringent in comparison with those that have been obtained "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.01112","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/2012.01112/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":"2026-07-05T02:10:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p00zdUk4/SMHcGkg/DrwWjJa/lU4Jx3Sdo3EZb3O7BqUtg4c/4tEPlguPrX0Itf9YzBU7lkh0cCw44+63vzpDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T12:39:24.645871Z"},"content_sha256":"93be6b625cc6e8ec3558ad916bd53ff03741f9eba5096254a49af9473fd141f3","schema_version":"1.0","event_id":"sha256:93be6b625cc6e8ec3558ad916bd53ff03741f9eba5096254a49af9473fd141f3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2WEOH4HT6TSFMA7ISA46PU6VF6/bundle.json","state_url":"https://pith.science/pith/2WEOH4HT6TSFMA7ISA46PU6VF6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2WEOH4HT6TSFMA7ISA46PU6VF6/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":"2026-08-06T12:39:24Z","links":{"resolver":"https://pith.science/pith/2WEOH4HT6TSFMA7ISA46PU6VF6","bundle":"https://pith.science/pith/2WEOH4HT6TSFMA7ISA46PU6VF6/bundle.json","state":"https://pith.science/pith/2WEOH4HT6TSFMA7ISA46PU6VF6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2WEOH4HT6TSFMA7ISA46PU6VF6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:2WEOH4HT6TSFMA7ISA46PU6VF6","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":"5ac62ec1864f3bb501de24266a5b8a573b07f20288281e7957256c097c79e49d","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-12-02T12:02:00Z","title_canon_sha256":"95427e0b00ce9b36de4665bd113f0c770f1b51b1fa4f3f841d6611733aa5415f"},"schema_version":"1.0","source":{"id":"2012.01112","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.01112","created_at":"2026-07-05T02:10:41Z"},{"alias_kind":"arxiv_version","alias_value":"2012.01112v2","created_at":"2026-07-05T02:10:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.01112","created_at":"2026-07-05T02:10:41Z"},{"alias_kind":"pith_short_12","alias_value":"2WEOH4HT6TSF","created_at":"2026-07-05T02:10:41Z"},{"alias_kind":"pith_short_16","alias_value":"2WEOH4HT6TSFMA7I","created_at":"2026-07-05T02:10:41Z"},{"alias_kind":"pith_short_8","alias_value":"2WEOH4HT","created_at":"2026-07-05T02:10:41Z"}],"graph_snapshots":[{"event_id":"sha256:93be6b625cc6e8ec3558ad916bd53ff03741f9eba5096254a49af9473fd141f3","target":"graph","created_at":"2026-07-05T02:10:41Z","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/2012.01112/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Astrophysical black holes are ideal laboratories for testing Einstein's theory of general relativity in the strong field regime. In this manuscript, we present an analysis of Suzaku and NuSTAR spectra of the black hole binary Cygnus X-1 using RELXILL_NK. Unlike our previous study on Cygnus X-1 with NuSTAR data, here we are able to constrain the Johannsen deformation parameter $\\alpha_{13}$. However, despite the high energy resolution near the iron line provided by Suzaku, our constraints on the Kerr metric from Cygnus X-1 are not very stringent in comparison with those that have been obtained ","authors_text":"Askar B. Abdikamalov, Cosimo Bambi, Dimitry Ayzenberg, Honghui Liu, Menglei Zhou, Zuobin Zhang","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-12-02T12:02:00Z","title":"Probing the near-horizon region of Cygnus X-1 with Suzaku and NuSTAR"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.01112","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:f9ce90ac5f1616efea7a5b5684ffd09bdb7f46346ae135a74877d7b7b8e6ea5f","target":"record","created_at":"2026-07-05T02:10:41Z","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":"5ac62ec1864f3bb501de24266a5b8a573b07f20288281e7957256c097c79e49d","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-12-02T12:02:00Z","title_canon_sha256":"95427e0b00ce9b36de4665bd113f0c770f1b51b1fa4f3f841d6611733aa5415f"},"schema_version":"1.0","source":{"id":"2012.01112","kind":"arxiv","version":2}},"canonical_sha256":"d588e3f0f3f4e45603e89039e7d3d52f95b2a9dd532e68955e5caa78eb6726bd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d588e3f0f3f4e45603e89039e7d3d52f95b2a9dd532e68955e5caa78eb6726bd","first_computed_at":"2026-07-05T02:10:41.249842Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:10:41.249842Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+0yf4auQL5wkZev2iOEK4EpAmiFelCT9WBcgKdciwxmToTDPp/XPCjZcXX3SpXnNZ9c60mqSDzsZ/KVrv8ccAg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:10:41.250263Z","signed_message":"canonical_sha256_bytes"},"source_id":"2012.01112","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f9ce90ac5f1616efea7a5b5684ffd09bdb7f46346ae135a74877d7b7b8e6ea5f","sha256:93be6b625cc6e8ec3558ad916bd53ff03741f9eba5096254a49af9473fd141f3"],"state_sha256":"d3f876bbf751189fe531a33c88e13b99d03c6f1088561938e1faada8f2aefa83"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tRhqRbt55Hf/Hl4urptlkbIs+rwe0ZvKtAqAIYw1yztk7vB+PqA/hZ/ImX0RO6m13BiHwarbM3Padwp5u1QyAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T12:39:24.664375Z","bundle_sha256":"d579cd5ef24a5a4283d5bc8c00917dfd93e85da19efd04a5831fec6974d206cf"}}