{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:FITJJRR2ZTDJDKYQQPAIICEKSI","short_pith_number":"pith:FITJJRR2","canonical_record":{"source":{"id":"1309.3280","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-09-12T20:00:08Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"531e87a59d559b6cd366ff0264041ecc90322f00f517d0cf9c8ca02a413147d6","abstract_canon_sha256":"a1b691083cf3bcbce0968d178c0927d810060c837e4578fc1a23951f8089d66e"},"schema_version":"1.0"},"canonical_sha256":"2a2694c63accc691ab1083c084088a92273e28b789e51292ac8f37c3b6cdcb09","source":{"kind":"arxiv","id":"1309.3280","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.3280","created_at":"2026-05-18T01:47:42Z"},{"alias_kind":"arxiv_version","alias_value":"1309.3280v1","created_at":"2026-05-18T01:47:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.3280","created_at":"2026-05-18T01:47:42Z"},{"alias_kind":"pith_short_12","alias_value":"FITJJRR2ZTDJ","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"FITJJRR2ZTDJDKYQ","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"FITJJRR2","created_at":"2026-05-18T12:27:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:FITJJRR2ZTDJDKYQQPAIICEKSI","target":"record","payload":{"canonical_record":{"source":{"id":"1309.3280","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-09-12T20:00:08Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"531e87a59d559b6cd366ff0264041ecc90322f00f517d0cf9c8ca02a413147d6","abstract_canon_sha256":"a1b691083cf3bcbce0968d178c0927d810060c837e4578fc1a23951f8089d66e"},"schema_version":"1.0"},"canonical_sha256":"2a2694c63accc691ab1083c084088a92273e28b789e51292ac8f37c3b6cdcb09","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:47:42.464685Z","signature_b64":"2vSUZK/H4Q8xBRJhiK8sbF5I4sbi1tiwlCBRVZQ1K6WzX3jXnpDakBHm8FtDL5gnUNTtiIdIjB1KZHtw6nUsBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2a2694c63accc691ab1083c084088a92273e28b789e51292ac8f37c3b6cdcb09","last_reissued_at":"2026-05-18T01:47:42.464202Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:47:42.464202Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1309.3280","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":"2026-05-18T01:47:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Crz1Bp4ZvcqCURVfSThAJBe40sOaMsrUVRdFgyJmS/0+ubL8lX+NNUyRmcMe/3jxMGSnQfEmwBtfXx5Sl0kwCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T00:42:05.492393Z"},"content_sha256":"7fbc62c3c3d2ce5e6cd662485673725c7cb141335521f8b703c5316a8f27822a","schema_version":"1.0","event_id":"sha256:7fbc62c3c3d2ce5e6cd662485673725c7cb141335521f8b703c5316a8f27822a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:FITJJRR2ZTDJDKYQQPAIICEKSI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"NuSTAR detection of the blazar B2 1023+25 at redshift 5.3","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.CO","authors_text":"A. Rau, C.J. Hailey, C.M. Urry, D. Stern, F. E. Chirstensen, F. Harrison, G. Ghisellini, G.M. Madejski, G. Tagliaferri, J. Greiner, M. Balokovic, M. Nardini, M. Perri, P. Giommi, P. Schady, S.E. Boggs, S. Puccetti, T. Hovatta, T. Sbarrato, V. Sudilovsky, W.N. Brandt, W.W. Zhang","submitted_at":"2013-09-12T20:00:08Z","abstract_excerpt":"B2 1023+25 is an extremely radio-loud quasar at z=5.3 which was first identified as a likely high-redshift blazar candidate in the SDSS+FIRST quasar catalog. Here we use the Nuclear Spectroscopic Telescope Array (NuSTAR) to investigate its non-thermal jet emission, whose high-energy component we detected in the hard X-ray energy band. The X-ray flux is ~5.5x10^(-14) erg cm^(-2)s^(-1) (5-10keV) and the photon spectral index is Gamma_X=1.3-1.6. Modeling the full spectral energy distribution, we find that the jet is oriented close to the line of sight, with a viewing angle of ~3deg, and has signi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.3280","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":"2026-05-18T01:47:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AFbwgzS2FUTiXONqZ8ssVNnRawHf9fbV4y6fOkVwVhCnyF6d7VLLdxHLcKiyR2XkWO2MSY9mSYFnxu/4OF6bDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T00:42:05.493095Z"},"content_sha256":"f82687810ead284221ec893066d3cc7ba8f2f2e4e33c6f8c1fe352fd93795bf0","schema_version":"1.0","event_id":"sha256:f82687810ead284221ec893066d3cc7ba8f2f2e4e33c6f8c1fe352fd93795bf0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FITJJRR2ZTDJDKYQQPAIICEKSI/bundle.json","state_url":"https://pith.science/pith/FITJJRR2ZTDJDKYQQPAIICEKSI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FITJJRR2ZTDJDKYQQPAIICEKSI/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":"2026-05-27T00:42:05Z","links":{"resolver":"https://pith.science/pith/FITJJRR2ZTDJDKYQQPAIICEKSI","bundle":"https://pith.science/pith/FITJJRR2ZTDJDKYQQPAIICEKSI/bundle.json","state":"https://pith.science/pith/FITJJRR2ZTDJDKYQQPAIICEKSI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FITJJRR2ZTDJDKYQQPAIICEKSI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:FITJJRR2ZTDJDKYQQPAIICEKSI","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":"a1b691083cf3bcbce0968d178c0927d810060c837e4578fc1a23951f8089d66e","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-09-12T20:00:08Z","title_canon_sha256":"531e87a59d559b6cd366ff0264041ecc90322f00f517d0cf9c8ca02a413147d6"},"schema_version":"1.0","source":{"id":"1309.3280","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.3280","created_at":"2026-05-18T01:47:42Z"},{"alias_kind":"arxiv_version","alias_value":"1309.3280v1","created_at":"2026-05-18T01:47:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.3280","created_at":"2026-05-18T01:47:42Z"},{"alias_kind":"pith_short_12","alias_value":"FITJJRR2ZTDJ","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"FITJJRR2ZTDJDKYQ","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"FITJJRR2","created_at":"2026-05-18T12:27:45Z"}],"graph_snapshots":[{"event_id":"sha256:f82687810ead284221ec893066d3cc7ba8f2f2e4e33c6f8c1fe352fd93795bf0","target":"graph","created_at":"2026-05-18T01:47:42Z","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":"B2 1023+25 is an extremely radio-loud quasar at z=5.3 which was first identified as a likely high-redshift blazar candidate in the SDSS+FIRST quasar catalog. Here we use the Nuclear Spectroscopic Telescope Array (NuSTAR) to investigate its non-thermal jet emission, whose high-energy component we detected in the hard X-ray energy band. The X-ray flux is ~5.5x10^(-14) erg cm^(-2)s^(-1) (5-10keV) and the photon spectral index is Gamma_X=1.3-1.6. Modeling the full spectral energy distribution, we find that the jet is oriented close to the line of sight, with a viewing angle of ~3deg, and has signi","authors_text":"A. Rau, C.J. Hailey, C.M. Urry, D. Stern, F. E. Chirstensen, F. Harrison, G. Ghisellini, G.M. Madejski, G. Tagliaferri, J. Greiner, M. Balokovic, M. Nardini, M. Perri, P. Giommi, P. Schady, S.E. Boggs, S. Puccetti, T. Hovatta, T. Sbarrato, V. Sudilovsky, W.N. Brandt, W.W. Zhang","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-09-12T20:00:08Z","title":"NuSTAR detection of the blazar B2 1023+25 at redshift 5.3"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.3280","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":"sha256:7fbc62c3c3d2ce5e6cd662485673725c7cb141335521f8b703c5316a8f27822a","target":"record","created_at":"2026-05-18T01:47:42Z","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":"a1b691083cf3bcbce0968d178c0927d810060c837e4578fc1a23951f8089d66e","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-09-12T20:00:08Z","title_canon_sha256":"531e87a59d559b6cd366ff0264041ecc90322f00f517d0cf9c8ca02a413147d6"},"schema_version":"1.0","source":{"id":"1309.3280","kind":"arxiv","version":1}},"canonical_sha256":"2a2694c63accc691ab1083c084088a92273e28b789e51292ac8f37c3b6cdcb09","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2a2694c63accc691ab1083c084088a92273e28b789e51292ac8f37c3b6cdcb09","first_computed_at":"2026-05-18T01:47:42.464202Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:47:42.464202Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2vSUZK/H4Q8xBRJhiK8sbF5I4sbi1tiwlCBRVZQ1K6WzX3jXnpDakBHm8FtDL5gnUNTtiIdIjB1KZHtw6nUsBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:47:42.464685Z","signed_message":"canonical_sha256_bytes"},"source_id":"1309.3280","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7fbc62c3c3d2ce5e6cd662485673725c7cb141335521f8b703c5316a8f27822a","sha256:f82687810ead284221ec893066d3cc7ba8f2f2e4e33c6f8c1fe352fd93795bf0"],"state_sha256":"3531409f104b077c1f3ca5890b34f72498fc087df9b394553737f2a6027bb3d4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7w6HVJEcZ1flDMN0YL9jZnK/mCIAxbMi9z8kz5uXOEkPnBtc7KGqC5B2ac5Hk6CXHlzTgWNQlht07hGujp4UBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T00:42:05.496777Z","bundle_sha256":"179980c30727b14d19e8ec4a5a680e19e29a4768848a6282ec5bf6ee36a32e2d"}}