{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:NDFIRSUCCIEILX2KIGTWQL5DTG","short_pith_number":"pith:NDFIRSUC","canonical_record":{"source":{"id":"2111.00719","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-11-01T06:15:42Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"ca3c2df0094bfc534bbada47ca5947536b45168bba2ea933a4106f78e3f0e930","abstract_canon_sha256":"308b445067d304315bfe3f0c95ab4a5b0aa255f668f63fb5b23649a1a8506c0e"},"schema_version":"1.0"},"canonical_sha256":"68ca88ca82120885df4a41a7682fa3998c5671426e1d4ea11f65ea10c2688bc2","source":{"kind":"arxiv","id":"2111.00719","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.00719","created_at":"2026-07-05T04:08:26Z"},{"alias_kind":"arxiv_version","alias_value":"2111.00719v3","created_at":"2026-07-05T04:08:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.00719","created_at":"2026-07-05T04:08:26Z"},{"alias_kind":"pith_short_12","alias_value":"NDFIRSUCCIEI","created_at":"2026-07-05T04:08:26Z"},{"alias_kind":"pith_short_16","alias_value":"NDFIRSUCCIEILX2K","created_at":"2026-07-05T04:08:26Z"},{"alias_kind":"pith_short_8","alias_value":"NDFIRSUC","created_at":"2026-07-05T04:08:26Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:NDFIRSUCCIEILX2KIGTWQL5DTG","target":"record","payload":{"canonical_record":{"source":{"id":"2111.00719","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-11-01T06:15:42Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"ca3c2df0094bfc534bbada47ca5947536b45168bba2ea933a4106f78e3f0e930","abstract_canon_sha256":"308b445067d304315bfe3f0c95ab4a5b0aa255f668f63fb5b23649a1a8506c0e"},"schema_version":"1.0"},"canonical_sha256":"68ca88ca82120885df4a41a7682fa3998c5671426e1d4ea11f65ea10c2688bc2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:08:26.946369Z","signature_b64":"H+QE86P7+hX8f5x5WUuvzvTF5lQNqdlOwJWw0XhwlpgaIxRRTHOgE/aLBSJeRP+3840j6Ddr26rndl7xZQVqBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"68ca88ca82120885df4a41a7682fa3998c5671426e1d4ea11f65ea10c2688bc2","last_reissued_at":"2026-07-05T04:08:26.945968Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:08:26.945968Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2111.00719","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":"2026-07-05T04:08:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w/zcf9FklGH8vk4jMOxUYz2VtonosyuvnGnz0ZnunbqNgg8cZqdxh27Renjx9pWObpR7sJQ3/RyKhtkmFAQIDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T21:51:41.760770Z"},"content_sha256":"89fb9495579c0895cbe17e9906616da19e7afe5a7587e4afb1bcc2fe87976a32","schema_version":"1.0","event_id":"sha256:89fb9495579c0895cbe17e9906616da19e7afe5a7587e4afb1bcc2fe87976a32"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:NDFIRSUCCIEILX2KIGTWQL5DTG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The spins of the Galactic black holes in MAXI J1535-571 and 4U 1630-472 from Insight-HXMT","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.HE","authors_text":"Cosimo Bambi, Honghui Liu, Long Ji, Qichun Liu","submitted_at":"2021-11-01T06:15:42Z","abstract_excerpt":"Insight-HXMT is the first Chinese X-ray astronomical mission. With a 1-250 keV bandpass, an energy resolution of 150 eV at 6 keV, and without being subject to pile-up distortions, it is suitable to study bright X-ray sources like Galactic black holes. In the present paper, we study Insight-HXMT observations of the X-ray binaries MAXI J1535-571 and 4U 1630-472 during their outbursts in 2017 and 2020, respectively. From the analysis of the reflection features, we are able to infer the black hole spin parameter in the two sources. For MAXI J1535-571, we find a spin parameter very close to 1, $a_*"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.00719","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/2111.00719/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":"2026-07-05T04:08:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jQeeI1I9f47HBTieISz4nJwJbbzIEKJ+5U3uVv6b58t985YGwoKbGQYY7vFwICzux3UoBz7y8h/pL3z4YE/QAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T21:51:41.761289Z"},"content_sha256":"75c6101930246628c1cfe623aadd35c83e3b0b29dc7fc3d764d336e48bd4be78","schema_version":"1.0","event_id":"sha256:75c6101930246628c1cfe623aadd35c83e3b0b29dc7fc3d764d336e48bd4be78"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NDFIRSUCCIEILX2KIGTWQL5DTG/bundle.json","state_url":"https://pith.science/pith/NDFIRSUCCIEILX2KIGTWQL5DTG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NDFIRSUCCIEILX2KIGTWQL5DTG/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":"2026-08-06T21:51:41Z","links":{"resolver":"https://pith.science/pith/NDFIRSUCCIEILX2KIGTWQL5DTG","bundle":"https://pith.science/pith/NDFIRSUCCIEILX2KIGTWQL5DTG/bundle.json","state":"https://pith.science/pith/NDFIRSUCCIEILX2KIGTWQL5DTG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NDFIRSUCCIEILX2KIGTWQL5DTG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:NDFIRSUCCIEILX2KIGTWQL5DTG","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":"308b445067d304315bfe3f0c95ab4a5b0aa255f668f63fb5b23649a1a8506c0e","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-11-01T06:15:42Z","title_canon_sha256":"ca3c2df0094bfc534bbada47ca5947536b45168bba2ea933a4106f78e3f0e930"},"schema_version":"1.0","source":{"id":"2111.00719","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.00719","created_at":"2026-07-05T04:08:26Z"},{"alias_kind":"arxiv_version","alias_value":"2111.00719v3","created_at":"2026-07-05T04:08:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.00719","created_at":"2026-07-05T04:08:26Z"},{"alias_kind":"pith_short_12","alias_value":"NDFIRSUCCIEI","created_at":"2026-07-05T04:08:26Z"},{"alias_kind":"pith_short_16","alias_value":"NDFIRSUCCIEILX2K","created_at":"2026-07-05T04:08:26Z"},{"alias_kind":"pith_short_8","alias_value":"NDFIRSUC","created_at":"2026-07-05T04:08:26Z"}],"graph_snapshots":[{"event_id":"sha256:75c6101930246628c1cfe623aadd35c83e3b0b29dc7fc3d764d336e48bd4be78","target":"graph","created_at":"2026-07-05T04:08:26Z","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/2111.00719/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Insight-HXMT is the first Chinese X-ray astronomical mission. With a 1-250 keV bandpass, an energy resolution of 150 eV at 6 keV, and without being subject to pile-up distortions, it is suitable to study bright X-ray sources like Galactic black holes. In the present paper, we study Insight-HXMT observations of the X-ray binaries MAXI J1535-571 and 4U 1630-472 during their outbursts in 2017 and 2020, respectively. From the analysis of the reflection features, we are able to infer the black hole spin parameter in the two sources. For MAXI J1535-571, we find a spin parameter very close to 1, $a_*","authors_text":"Cosimo Bambi, Honghui Liu, Long Ji, Qichun Liu","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-11-01T06:15:42Z","title":"The spins of the Galactic black holes in MAXI J1535-571 and 4U 1630-472 from Insight-HXMT"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.00719","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":"sha256:89fb9495579c0895cbe17e9906616da19e7afe5a7587e4afb1bcc2fe87976a32","target":"record","created_at":"2026-07-05T04:08:26Z","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":"308b445067d304315bfe3f0c95ab4a5b0aa255f668f63fb5b23649a1a8506c0e","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-11-01T06:15:42Z","title_canon_sha256":"ca3c2df0094bfc534bbada47ca5947536b45168bba2ea933a4106f78e3f0e930"},"schema_version":"1.0","source":{"id":"2111.00719","kind":"arxiv","version":3}},"canonical_sha256":"68ca88ca82120885df4a41a7682fa3998c5671426e1d4ea11f65ea10c2688bc2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"68ca88ca82120885df4a41a7682fa3998c5671426e1d4ea11f65ea10c2688bc2","first_computed_at":"2026-07-05T04:08:26.945968Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:08:26.945968Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"H+QE86P7+hX8f5x5WUuvzvTF5lQNqdlOwJWw0XhwlpgaIxRRTHOgE/aLBSJeRP+3840j6Ddr26rndl7xZQVqBg==","signature_status":"signed_v1","signed_at":"2026-07-05T04:08:26.946369Z","signed_message":"canonical_sha256_bytes"},"source_id":"2111.00719","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:89fb9495579c0895cbe17e9906616da19e7afe5a7587e4afb1bcc2fe87976a32","sha256:75c6101930246628c1cfe623aadd35c83e3b0b29dc7fc3d764d336e48bd4be78"],"state_sha256":"f7d122bc1eb1340d51d4ab209132b63c38ee8b9ba74f7e9b212e6d299d5680e3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xmFCdMuMGc/nXj+nuaPLUu7BW3HIaUqQLPPewC6I3I0i6qHrc4oAlkPxlTzCtpHYLLyA/ptn6hfkk0Iw5ioBBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T21:51:41.764931Z","bundle_sha256":"4a1cb7f1606b9342bccccd9c37571b1db0068d00920846a98f4e05cf455ea19e"}}