{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:HG5FLTQQED2CX4DNJW2CRXRMXO","short_pith_number":"pith:HG5FLTQQ","canonical_record":{"source":{"id":"0706.2137","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-06-14T14:48:10Z","cross_cats_sorted":[],"title_canon_sha256":"bb03840af9459c4b1b598b9259b3ad01e947db942a3995cc309e936f8ff29b65","abstract_canon_sha256":"88050cc50e37833c4ea17b6c1f90bd04d6080bed4590a39a1021c4a47dd26a05"},"schema_version":"1.0"},"canonical_sha256":"39ba55ce1020f42bf06d4db428de2cbb9e9dafc484c52b5b84f4ce617c03336d","source":{"kind":"arxiv","id":"0706.2137","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0706.2137","created_at":"2026-07-04T15:02:14Z"},{"alias_kind":"arxiv_version","alias_value":"0706.2137v1","created_at":"2026-07-04T15:02:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0706.2137","created_at":"2026-07-04T15:02:14Z"},{"alias_kind":"pith_short_12","alias_value":"HG5FLTQQED2C","created_at":"2026-07-04T15:02:14Z"},{"alias_kind":"pith_short_16","alias_value":"HG5FLTQQED2CX4DN","created_at":"2026-07-04T15:02:14Z"},{"alias_kind":"pith_short_8","alias_value":"HG5FLTQQ","created_at":"2026-07-04T15:02:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:HG5FLTQQED2CX4DNJW2CRXRMXO","target":"record","payload":{"canonical_record":{"source":{"id":"0706.2137","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-06-14T14:48:10Z","cross_cats_sorted":[],"title_canon_sha256":"bb03840af9459c4b1b598b9259b3ad01e947db942a3995cc309e936f8ff29b65","abstract_canon_sha256":"88050cc50e37833c4ea17b6c1f90bd04d6080bed4590a39a1021c4a47dd26a05"},"schema_version":"1.0"},"canonical_sha256":"39ba55ce1020f42bf06d4db428de2cbb9e9dafc484c52b5b84f4ce617c03336d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:02:14.905605Z","signature_b64":"dLrqoPXVEiJOP0oQPkJDty7+VCcpXhwktEONgCGhK0sTvqL2iaMjiPosWvncRlN1ukX5kMbMURyFwa3X6ir1Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"39ba55ce1020f42bf06d4db428de2cbb9e9dafc484c52b5b84f4ce617c03336d","last_reissued_at":"2026-07-04T15:02:14.905243Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:02:14.905243Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0706.2137","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":"2026-07-04T15:02:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cYFy8Bmgp6jT8DmK7f6dP7wsts/bq9lIyb+brRptKRwTxQKBwZaFCBfpG6gZS+JzruDri1pVdP5o9qDKWYO8BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T14:58:41.759241Z"},"content_sha256":"9472f1b85ec39ff22e69b27a9dcd18d280adc6f989c5b5755bd3481e2a9ffe00","schema_version":"1.0","event_id":"sha256:9472f1b85ec39ff22e69b27a9dcd18d280adc6f989c5b5755bd3481e2a9ffe00"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:HG5FLTQQED2CX4DNJW2CRXRMXO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The broadband spectrum of Cygnus X-1","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Santangelo, E. Kendziorra, I. Kreykenbohm, J. Wilms, K. Pottschmidt, M. A. Nowak, M. G. Kirsch, S. Fritz","submitted_at":"2007-06-14T14:48:10Z","abstract_excerpt":"The Black Hole (BH) binary Cygnus X-1 has been observed simultaneously by INTEGRAL, RXTE, and XMM-Newton for four times in November and December 2004, when Cyg X-1 became first observable with XMM-Newton. During these observations the source was found in one of its transitional states between the hard state and the soft state. We obtained a high signal to noise spectrum of Cyg X-1 from 3 keV to 1 MeV which allows us to put constraints on the nature of the Comptonizing plasma by modeling the continuum with Comptonization models as eqpair (Coppi 1992). Using XMM-Newton we were also able to confi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0706.2137","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/0706.2137/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":"2026-07-04T15:02:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Px6WNf+vEyXecJdPWSJuM0CAlUZ2n5E/X3baivSaf7as+NdpuYqAgpzsFaJ1/f4jSAFsZLJJv1Tvx6l8WTqiAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T14:58:41.759727Z"},"content_sha256":"4ff94d620f36a5ef56cb91e11d4e4724a1590f4c48ac3e205c5adb656181319e","schema_version":"1.0","event_id":"sha256:4ff94d620f36a5ef56cb91e11d4e4724a1590f4c48ac3e205c5adb656181319e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HG5FLTQQED2CX4DNJW2CRXRMXO/bundle.json","state_url":"https://pith.science/pith/HG5FLTQQED2CX4DNJW2CRXRMXO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HG5FLTQQED2CX4DNJW2CRXRMXO/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":"2026-08-05T14:58:41Z","links":{"resolver":"https://pith.science/pith/HG5FLTQQED2CX4DNJW2CRXRMXO","bundle":"https://pith.science/pith/HG5FLTQQED2CX4DNJW2CRXRMXO/bundle.json","state":"https://pith.science/pith/HG5FLTQQED2CX4DNJW2CRXRMXO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HG5FLTQQED2CX4DNJW2CRXRMXO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:HG5FLTQQED2CX4DNJW2CRXRMXO","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":"88050cc50e37833c4ea17b6c1f90bd04d6080bed4590a39a1021c4a47dd26a05","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-06-14T14:48:10Z","title_canon_sha256":"bb03840af9459c4b1b598b9259b3ad01e947db942a3995cc309e936f8ff29b65"},"schema_version":"1.0","source":{"id":"0706.2137","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0706.2137","created_at":"2026-07-04T15:02:14Z"},{"alias_kind":"arxiv_version","alias_value":"0706.2137v1","created_at":"2026-07-04T15:02:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0706.2137","created_at":"2026-07-04T15:02:14Z"},{"alias_kind":"pith_short_12","alias_value":"HG5FLTQQED2C","created_at":"2026-07-04T15:02:14Z"},{"alias_kind":"pith_short_16","alias_value":"HG5FLTQQED2CX4DN","created_at":"2026-07-04T15:02:14Z"},{"alias_kind":"pith_short_8","alias_value":"HG5FLTQQ","created_at":"2026-07-04T15:02:14Z"}],"graph_snapshots":[{"event_id":"sha256:4ff94d620f36a5ef56cb91e11d4e4724a1590f4c48ac3e205c5adb656181319e","target":"graph","created_at":"2026-07-04T15:02:14Z","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/0706.2137/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Black Hole (BH) binary Cygnus X-1 has been observed simultaneously by INTEGRAL, RXTE, and XMM-Newton for four times in November and December 2004, when Cyg X-1 became first observable with XMM-Newton. During these observations the source was found in one of its transitional states between the hard state and the soft state. We obtained a high signal to noise spectrum of Cyg X-1 from 3 keV to 1 MeV which allows us to put constraints on the nature of the Comptonizing plasma by modeling the continuum with Comptonization models as eqpair (Coppi 1992). Using XMM-Newton we were also able to confi","authors_text":"A. Santangelo, E. Kendziorra, I. Kreykenbohm, J. Wilms, K. Pottschmidt, M. A. Nowak, M. G. Kirsch, S. Fritz","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-06-14T14:48:10Z","title":"The broadband spectrum of Cygnus X-1"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0706.2137","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":"sha256:9472f1b85ec39ff22e69b27a9dcd18d280adc6f989c5b5755bd3481e2a9ffe00","target":"record","created_at":"2026-07-04T15:02:14Z","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":"88050cc50e37833c4ea17b6c1f90bd04d6080bed4590a39a1021c4a47dd26a05","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-06-14T14:48:10Z","title_canon_sha256":"bb03840af9459c4b1b598b9259b3ad01e947db942a3995cc309e936f8ff29b65"},"schema_version":"1.0","source":{"id":"0706.2137","kind":"arxiv","version":1}},"canonical_sha256":"39ba55ce1020f42bf06d4db428de2cbb9e9dafc484c52b5b84f4ce617c03336d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"39ba55ce1020f42bf06d4db428de2cbb9e9dafc484c52b5b84f4ce617c03336d","first_computed_at":"2026-07-04T15:02:14.905243Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:02:14.905243Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dLrqoPXVEiJOP0oQPkJDty7+VCcpXhwktEONgCGhK0sTvqL2iaMjiPosWvncRlN1ukX5kMbMURyFwa3X6ir1Bg==","signature_status":"signed_v1","signed_at":"2026-07-04T15:02:14.905605Z","signed_message":"canonical_sha256_bytes"},"source_id":"0706.2137","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9472f1b85ec39ff22e69b27a9dcd18d280adc6f989c5b5755bd3481e2a9ffe00","sha256:4ff94d620f36a5ef56cb91e11d4e4724a1590f4c48ac3e205c5adb656181319e"],"state_sha256":"39417ba99bb158f27b12b21be87c399484d43484016e6a746937da50ac866a19"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eiGfGXGJnQFV9DwnOzr6oiku2GT1783x7SYGAfQLGdC6KZdiJoPsLcLpySzZwutKqE/M7x9b8WfrmDebm1YHDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T14:58:41.763242Z","bundle_sha256":"f1cb1b03de9766552c1023b10f0f9aa69f5dfd779c6850edfc614bf357f5e218"}}