{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:77A2QPFC3KX5W23UYYVLQXQZDM","short_pith_number":"pith:77A2QPFC","canonical_record":{"source":{"id":"1206.2375","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-06-11T20:33:58Z","cross_cats_sorted":[],"title_canon_sha256":"83f63af94baf14d53076b00617de1d03710694ad1048caa2fc8d685c746709d3","abstract_canon_sha256":"fa4d29162f3e2ff70056d1e741398b5f4d2bbe9de072b1ab553500e7a7098817"},"schema_version":"1.0"},"canonical_sha256":"ffc1a83ca2daafdb6b74c62ab85e191b30700cbd8475acfa6a0cc4e6c4639bf1","source":{"kind":"arxiv","id":"1206.2375","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.2375","created_at":"2026-05-18T01:56:59Z"},{"alias_kind":"arxiv_version","alias_value":"1206.2375v2","created_at":"2026-05-18T01:56:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.2375","created_at":"2026-05-18T01:56:59Z"},{"alias_kind":"pith_short_12","alias_value":"77A2QPFC3KX5","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"77A2QPFC3KX5W23U","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"77A2QPFC","created_at":"2026-05-18T12:26:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:77A2QPFC3KX5W23UYYVLQXQZDM","target":"record","payload":{"canonical_record":{"source":{"id":"1206.2375","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-06-11T20:33:58Z","cross_cats_sorted":[],"title_canon_sha256":"83f63af94baf14d53076b00617de1d03710694ad1048caa2fc8d685c746709d3","abstract_canon_sha256":"fa4d29162f3e2ff70056d1e741398b5f4d2bbe9de072b1ab553500e7a7098817"},"schema_version":"1.0"},"canonical_sha256":"ffc1a83ca2daafdb6b74c62ab85e191b30700cbd8475acfa6a0cc4e6c4639bf1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:56:59.638028Z","signature_b64":"KoF6D0Vgwx8a+frzuE+kwrudGItIPKrzG+w91Y2A+3CgbNA6/C1cVRVCFwuqBuQZXXmIsHSglGcxWXW5x5ErAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ffc1a83ca2daafdb6b74c62ab85e191b30700cbd8475acfa6a0cc4e6c4639bf1","last_reissued_at":"2026-05-18T01:56:59.637630Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:56:59.637630Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1206.2375","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":"2026-05-18T01:56:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/j/k/9XzoDjnYnikXqXgwltGiIfdCEsRoIoErLUcWmYP2PW8M+moabbdvoOK/XQrMi0Tvgi9em3fSLXYC1Y5DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T19:09:41.679725Z"},"content_sha256":"4e47a4c3c7848a0ee7bddd3c28d592b6387ca35bd1c61bb60507f8a298da4646","schema_version":"1.0","event_id":"sha256:4e47a4c3c7848a0ee7bddd3c28d592b6387ca35bd1c61bb60507f8a298da4646"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:77A2QPFC3KX5W23UYYVLQXQZDM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Angular fluctuations in the CXB: Is Fe 6.4 keV line tomography of the large-scale structure feasible?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Gert H\\\"utsi, Marat Gilfanov, Rashid Sunyaev","submitted_at":"2012-06-11T20:33:58Z","abstract_excerpt":"AGN are known to account for a major portion, if not all, of the cosmic X-ray background radiation. The dominant sharp spectral feature in their spectra is the 6.4 keV fluorescent line of iron, which may contribute to as much as ~ 5-10 % of the CXB spectral intensity at ~ 2-6 keV. Owing to cosmological redshift, the line photons detected at the energy E carry information about objects located at the redshift z=6.4/E-1. In particular, imprinted in their angular fluctuations is the information about the large-scale structure at redshift z. This opens the possibility of performing the Fe K_alpha "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.2375","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":""},"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":"2026-05-18T01:56:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IzwSbBfAeT4r85URY6kRkDLOwk4NW6YN+/YYcEu07AVqniAz+m9YRnMI1G3y3viSX+FDzcmxlicbjSkNdlUMAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T19:09:41.680359Z"},"content_sha256":"a076188de421d362085e5ff82480288de1b7f718d877db1a34af9b68356b3e5a","schema_version":"1.0","event_id":"sha256:a076188de421d362085e5ff82480288de1b7f718d877db1a34af9b68356b3e5a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/77A2QPFC3KX5W23UYYVLQXQZDM/bundle.json","state_url":"https://pith.science/pith/77A2QPFC3KX5W23UYYVLQXQZDM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/77A2QPFC3KX5W23UYYVLQXQZDM/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":"2026-05-28T19:09:41Z","links":{"resolver":"https://pith.science/pith/77A2QPFC3KX5W23UYYVLQXQZDM","bundle":"https://pith.science/pith/77A2QPFC3KX5W23UYYVLQXQZDM/bundle.json","state":"https://pith.science/pith/77A2QPFC3KX5W23UYYVLQXQZDM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/77A2QPFC3KX5W23UYYVLQXQZDM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:77A2QPFC3KX5W23UYYVLQXQZDM","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":"fa4d29162f3e2ff70056d1e741398b5f4d2bbe9de072b1ab553500e7a7098817","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-06-11T20:33:58Z","title_canon_sha256":"83f63af94baf14d53076b00617de1d03710694ad1048caa2fc8d685c746709d3"},"schema_version":"1.0","source":{"id":"1206.2375","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.2375","created_at":"2026-05-18T01:56:59Z"},{"alias_kind":"arxiv_version","alias_value":"1206.2375v2","created_at":"2026-05-18T01:56:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.2375","created_at":"2026-05-18T01:56:59Z"},{"alias_kind":"pith_short_12","alias_value":"77A2QPFC3KX5","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"77A2QPFC3KX5W23U","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"77A2QPFC","created_at":"2026-05-18T12:26:56Z"}],"graph_snapshots":[{"event_id":"sha256:a076188de421d362085e5ff82480288de1b7f718d877db1a34af9b68356b3e5a","target":"graph","created_at":"2026-05-18T01:56:59Z","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"},"paper":{"abstract_excerpt":"AGN are known to account for a major portion, if not all, of the cosmic X-ray background radiation. The dominant sharp spectral feature in their spectra is the 6.4 keV fluorescent line of iron, which may contribute to as much as ~ 5-10 % of the CXB spectral intensity at ~ 2-6 keV. Owing to cosmological redshift, the line photons detected at the energy E carry information about objects located at the redshift z=6.4/E-1. In particular, imprinted in their angular fluctuations is the information about the large-scale structure at redshift z. This opens the possibility of performing the Fe K_alpha ","authors_text":"Gert H\\\"utsi, Marat Gilfanov, Rashid Sunyaev","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-06-11T20:33:58Z","title":"Angular fluctuations in the CXB: Is Fe 6.4 keV line tomography of the large-scale structure feasible?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.2375","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":"sha256:4e47a4c3c7848a0ee7bddd3c28d592b6387ca35bd1c61bb60507f8a298da4646","target":"record","created_at":"2026-05-18T01:56:59Z","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":"fa4d29162f3e2ff70056d1e741398b5f4d2bbe9de072b1ab553500e7a7098817","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-06-11T20:33:58Z","title_canon_sha256":"83f63af94baf14d53076b00617de1d03710694ad1048caa2fc8d685c746709d3"},"schema_version":"1.0","source":{"id":"1206.2375","kind":"arxiv","version":2}},"canonical_sha256":"ffc1a83ca2daafdb6b74c62ab85e191b30700cbd8475acfa6a0cc4e6c4639bf1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ffc1a83ca2daafdb6b74c62ab85e191b30700cbd8475acfa6a0cc4e6c4639bf1","first_computed_at":"2026-05-18T01:56:59.637630Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:56:59.637630Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KoF6D0Vgwx8a+frzuE+kwrudGItIPKrzG+w91Y2A+3CgbNA6/C1cVRVCFwuqBuQZXXmIsHSglGcxWXW5x5ErAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:56:59.638028Z","signed_message":"canonical_sha256_bytes"},"source_id":"1206.2375","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4e47a4c3c7848a0ee7bddd3c28d592b6387ca35bd1c61bb60507f8a298da4646","sha256:a076188de421d362085e5ff82480288de1b7f718d877db1a34af9b68356b3e5a"],"state_sha256":"319d2fb6cb4e5d797760d9f3d173ac7bdfb54e89939869e98dcb9855bbf2def1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5dkOPwT2d4020UuOpjRfxowzVQTQ4WtZf2QU9OW+xAgiXNP4W4rF8h89am56Gdo0ugRQ7G98yfZq4LDpxAChAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T19:09:41.683548Z","bundle_sha256":"47131119b6f8002d23dc154afec58f575da30b1e9dabe837bf8423211a72b8db"}}