{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:DOMH6PSLSWWY2X36HTZZN7MZPF","short_pith_number":"pith:DOMH6PSL","canonical_record":{"source":{"id":"1307.1733","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-07-05T22:41:00Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"8db1c8ff66d83f89125aba016f456c175f7e6f2314da945b40a4269c7990c7c1","abstract_canon_sha256":"8f56c718981ce8adc9a0048ab42da685d2a847852de6f409c8298ff5ee838adf"},"schema_version":"1.0"},"canonical_sha256":"1b987f3e4b95ad8d5f7e3cf396fd99796f834efe9b3bed9d84594e306dfa8078","source":{"kind":"arxiv","id":"1307.1733","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.1733","created_at":"2026-05-18T01:48:59Z"},{"alias_kind":"arxiv_version","alias_value":"1307.1733v1","created_at":"2026-05-18T01:48:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.1733","created_at":"2026-05-18T01:48:59Z"},{"alias_kind":"pith_short_12","alias_value":"DOMH6PSLSWWY","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"DOMH6PSLSWWY2X36","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"DOMH6PSL","created_at":"2026-05-18T12:27:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:DOMH6PSLSWWY2X36HTZZN7MZPF","target":"record","payload":{"canonical_record":{"source":{"id":"1307.1733","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-07-05T22:41:00Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"8db1c8ff66d83f89125aba016f456c175f7e6f2314da945b40a4269c7990c7c1","abstract_canon_sha256":"8f56c718981ce8adc9a0048ab42da685d2a847852de6f409c8298ff5ee838adf"},"schema_version":"1.0"},"canonical_sha256":"1b987f3e4b95ad8d5f7e3cf396fd99796f834efe9b3bed9d84594e306dfa8078","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:48:59.203195Z","signature_b64":"ZhnNb4pl0Fqxs+j2D9pinSleNKGxx4pJtW8Cp6xWUZcLcSNNSRPHhvw8o+3lzAiyX9ttxCo5RQi5BxrTxgJPBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1b987f3e4b95ad8d5f7e3cf396fd99796f834efe9b3bed9d84594e306dfa8078","last_reissued_at":"2026-05-18T01:48:59.202598Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:48:59.202598Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1307.1733","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":"2026-05-18T01:48:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GTmjrQT4Fwlp4h+DcFjxLlgYjXukac9+8XpqcD9dlIomFTSn0YZBj0SrxTaoa9kbGvMO2kqMZBSRHF2/YFtqBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T17:17:39.265351Z"},"content_sha256":"bc8db5346015e131e3d529d9f9a3807a01b0c2cf949e6c092936f99d639e28a7","schema_version":"1.0","event_id":"sha256:bc8db5346015e131e3d529d9f9a3807a01b0c2cf949e6c092936f99d639e28a7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:DOMH6PSLSWWY2X36HTZZN7MZPF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The NuSTAR Extragalactic Survey: A First Sensitive Look at the High-Energy Cosmic X-ray Background Population","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.HE","authors_text":"A. Comastri, A. Del Moro, A. H. Gonzalez, B. Luo, B. W. Grefenstette, C. J. Hailey, C. M. Urry, C. R. Bridge, C. Saez, C. W. Tsar, D. M. Alexander (Durham), D. R. Ballantyne, D. Stern (JPL), E. Treister, F. A. Harrison, F. Civano, F. E. Bauer, F. E. Christensen, G. B. Lansbury, J. Aird, J. R. Mullaney, K. K. Madsen, M. Ajello, M. Elvis, M. Perri, P. R. M. Eisenhardt, R. C. Hickox, R. J. Assef, S. E. Boggs, S. H. Miller, S. Puccetti, W. N. Brandt, W. W. Craig, W. W. Zhang","submitted_at":"2013-07-05T22:41:00Z","abstract_excerpt":"We report on the first ten identifications of sources serendipitously detected by the NuSTAR to provide the first sensitive census of the cosmic X-ray background (CXB) source population at >10 keV. We find that these NuSTAR-detected sources are ~100x fainter than those previously detected at >10 keV and have a broad range in redshift and luminosity (z=0.020-2.923 and L_10-40 keV~4x10^{41}-5x10^{45} erg/s); the median redshift and luminosity are z~0.7 and L_10-40 keV~3x10^{44} erg/s, respectively. We characterize these sources on the basis of broad-band ~0.5-32 keV spectroscopy, optical spectro"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.1733","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":""},"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":"2026-05-18T01:48:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y3/ZgDC5d+/sjH08GYFNksT4j/ebeJS1QVKSjXgvvuvajKWwMR2iZbyQ1LlpBsWvc4i2u465Zh6GQYkbwMIDCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T17:17:39.266091Z"},"content_sha256":"c7f8a872c6eac07d2a45481fe763c53d46afb04683e39493aebba811a86967b9","schema_version":"1.0","event_id":"sha256:c7f8a872c6eac07d2a45481fe763c53d46afb04683e39493aebba811a86967b9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DOMH6PSLSWWY2X36HTZZN7MZPF/bundle.json","state_url":"https://pith.science/pith/DOMH6PSLSWWY2X36HTZZN7MZPF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DOMH6PSLSWWY2X36HTZZN7MZPF/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":"2026-05-26T17:17:39Z","links":{"resolver":"https://pith.science/pith/DOMH6PSLSWWY2X36HTZZN7MZPF","bundle":"https://pith.science/pith/DOMH6PSLSWWY2X36HTZZN7MZPF/bundle.json","state":"https://pith.science/pith/DOMH6PSLSWWY2X36HTZZN7MZPF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DOMH6PSLSWWY2X36HTZZN7MZPF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:DOMH6PSLSWWY2X36HTZZN7MZPF","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":"8f56c718981ce8adc9a0048ab42da685d2a847852de6f409c8298ff5ee838adf","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-07-05T22:41:00Z","title_canon_sha256":"8db1c8ff66d83f89125aba016f456c175f7e6f2314da945b40a4269c7990c7c1"},"schema_version":"1.0","source":{"id":"1307.1733","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.1733","created_at":"2026-05-18T01:48:59Z"},{"alias_kind":"arxiv_version","alias_value":"1307.1733v1","created_at":"2026-05-18T01:48:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.1733","created_at":"2026-05-18T01:48:59Z"},{"alias_kind":"pith_short_12","alias_value":"DOMH6PSLSWWY","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"DOMH6PSLSWWY2X36","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"DOMH6PSL","created_at":"2026-05-18T12:27:43Z"}],"graph_snapshots":[{"event_id":"sha256:c7f8a872c6eac07d2a45481fe763c53d46afb04683e39493aebba811a86967b9","target":"graph","created_at":"2026-05-18T01:48:59Z","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":"We report on the first ten identifications of sources serendipitously detected by the NuSTAR to provide the first sensitive census of the cosmic X-ray background (CXB) source population at >10 keV. We find that these NuSTAR-detected sources are ~100x fainter than those previously detected at >10 keV and have a broad range in redshift and luminosity (z=0.020-2.923 and L_10-40 keV~4x10^{41}-5x10^{45} erg/s); the median redshift and luminosity are z~0.7 and L_10-40 keV~3x10^{44} erg/s, respectively. We characterize these sources on the basis of broad-band ~0.5-32 keV spectroscopy, optical spectro","authors_text":"A. Comastri, A. Del Moro, A. H. Gonzalez, B. Luo, B. W. Grefenstette, C. J. Hailey, C. M. Urry, C. R. Bridge, C. Saez, C. W. Tsar, D. M. Alexander (Durham), D. R. Ballantyne, D. Stern (JPL), E. Treister, F. A. Harrison, F. Civano, F. E. Bauer, F. E. Christensen, G. B. Lansbury, J. Aird, J. R. Mullaney, K. K. Madsen, M. Ajello, M. Elvis, M. Perri, P. R. M. Eisenhardt, R. C. Hickox, R. J. Assef, S. E. Boggs, S. H. Miller, S. Puccetti, W. N. Brandt, W. W. Craig, W. W. Zhang","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-07-05T22:41:00Z","title":"The NuSTAR Extragalactic Survey: A First Sensitive Look at the High-Energy Cosmic X-ray Background Population"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.1733","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:bc8db5346015e131e3d529d9f9a3807a01b0c2cf949e6c092936f99d639e28a7","target":"record","created_at":"2026-05-18T01:48:59Z","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":"8f56c718981ce8adc9a0048ab42da685d2a847852de6f409c8298ff5ee838adf","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-07-05T22:41:00Z","title_canon_sha256":"8db1c8ff66d83f89125aba016f456c175f7e6f2314da945b40a4269c7990c7c1"},"schema_version":"1.0","source":{"id":"1307.1733","kind":"arxiv","version":1}},"canonical_sha256":"1b987f3e4b95ad8d5f7e3cf396fd99796f834efe9b3bed9d84594e306dfa8078","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1b987f3e4b95ad8d5f7e3cf396fd99796f834efe9b3bed9d84594e306dfa8078","first_computed_at":"2026-05-18T01:48:59.202598Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:48:59.202598Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZhnNb4pl0Fqxs+j2D9pinSleNKGxx4pJtW8Cp6xWUZcLcSNNSRPHhvw8o+3lzAiyX9ttxCo5RQi5BxrTxgJPBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:48:59.203195Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.1733","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bc8db5346015e131e3d529d9f9a3807a01b0c2cf949e6c092936f99d639e28a7","sha256:c7f8a872c6eac07d2a45481fe763c53d46afb04683e39493aebba811a86967b9"],"state_sha256":"10610eaacbc9b13c300626d35845c4c9e463242b0f5536a2d279e746cd6c380f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"utQGKzNufnb5HpO3cY83TsEAYpBXX1hRptIkajY0kqdki4mXHPTtFFCu2nE2bQZEz54TmmsRlvKDuUXfyIsqBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T17:17:39.269611Z","bundle_sha256":"cb107f2fc069b59567d717397e28c50e6cc76a1cc2ffa9d87863eaa6916d69df"}}