{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:K5C5LQIXAOX4SAQAJWMIDIG2VV","short_pith_number":"pith:K5C5LQIX","canonical_record":{"source":{"id":"1609.02203","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-09-07T21:52:07Z","cross_cats_sorted":[],"title_canon_sha256":"bbe4dd50efdfe9ead973e5dc7542259d953a2c26706f50e22cdc432fec28abfc","abstract_canon_sha256":"9f4ce27d67ee032b6548abe70c25151a1fb92d6482b511684ac4ddd8c03988bd"},"schema_version":"1.0"},"canonical_sha256":"5745d5c11703afc902004d9881a0daad43bc1443f522a3656ee40f6579865caf","source":{"kind":"arxiv","id":"1609.02203","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.02203","created_at":"2026-05-18T00:59:57Z"},{"alias_kind":"arxiv_version","alias_value":"1609.02203v1","created_at":"2026-05-18T00:59:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.02203","created_at":"2026-05-18T00:59:57Z"},{"alias_kind":"pith_short_12","alias_value":"K5C5LQIXAOX4","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"K5C5LQIXAOX4SAQA","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"K5C5LQIX","created_at":"2026-05-18T12:30:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:K5C5LQIXAOX4SAQAJWMIDIG2VV","target":"record","payload":{"canonical_record":{"source":{"id":"1609.02203","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-09-07T21:52:07Z","cross_cats_sorted":[],"title_canon_sha256":"bbe4dd50efdfe9ead973e5dc7542259d953a2c26706f50e22cdc432fec28abfc","abstract_canon_sha256":"9f4ce27d67ee032b6548abe70c25151a1fb92d6482b511684ac4ddd8c03988bd"},"schema_version":"1.0"},"canonical_sha256":"5745d5c11703afc902004d9881a0daad43bc1443f522a3656ee40f6579865caf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:59:57.199268Z","signature_b64":"MSYBsoTdiOjANlDXwtQ/9Ym3TnVPcYvyO2/8dG6lRihiG3c3ElSsCmVFBtxnSLRrk+YlQeTkfxRUUu0iqSIxAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5745d5c11703afc902004d9881a0daad43bc1443f522a3656ee40f6579865caf","last_reissued_at":"2026-05-18T00:59:57.198766Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:59:57.198766Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1609.02203","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":"2026-05-18T00:59:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0/rfYvrOrfuOLUcc/kBAkdCTRgMv+PqbSXGNSvGXGOZNVvwMVbrjYqKzhEP1Hfyz+Gv9DB0P+v8otIrAA61cDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T22:52:03.959344Z"},"content_sha256":"2d120e9a009fc9d1cee48d9b5951fb7554922ba405db376d34933509cfe39155","schema_version":"1.0","event_id":"sha256:2d120e9a009fc9d1cee48d9b5951fb7554922ba405db376d34933509cfe39155"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:K5C5LQIXAOX4SAQAJWMIDIG2VV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"First NuSTAR observations of the BL Lac - type blazar PKS~2155-304: constraints on the jet content and distribution of radiating particles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Hornstrup, A. K. Furniss, A. Zoglauer, B. Giebels, B. Grefenstette, C. Hailey, C. M. Urry, D. Barret, D. M. Alexander, D. Paneque, D. Sanchez, D. Stern, F. A. Harrison, F. E. Christensen, G. M. Madejski, H. Miyasaka, J. Chiang, J. E. Koglin, K. Forster, K. K. Madsen, K. Mori, K. Nalewajko, M. Ajello, M. Balokovi\\'c, M. Hayashida, M. J. Pivovaroff, M. Perri, M. Sikora, N. J. Westergaard, P. Giommi, P. H. Mao, R. D. Blandford, S. E. Boggs, S. Puccetti, T. Kitaguchi, V. Rana, W. W. Craig, W. W. Zhang","submitted_at":"2016-09-07T21:52:07Z","abstract_excerpt":"We report the first hard X-ray observations with NuSTAR of the BL Lac type blazar PKS 2155-304, augmented with soft X-ray data from XMM-Newton and gamma-ray data from the Fermi Large Area Telescope, obtained in April 2013 when the source was in a very low flux state. A joint NuSTAR and XMM spectrum, covering the energy range 0.5 - 60 keV, is best described by a model consisting of a log-parabola component with curvature beta = 0.3(+0.2,-0.1) and a (local) photon index 3.04 +/- 0.15 at photon energy of 2 keV, and a hard power-law tail with photon index 2.2 +/- 0.4. The hard X-ray tail can be sm"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.02203","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":"2026-05-18T00:59:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9ZDIT/jImsjrGD2jiGn3UWP6fPpF42EWS1Jcu2PlE9NhGav23rypGLQ6GaF5+K9VBK9oB3Bb8dUmSvu+BGQtBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T22:52:03.960033Z"},"content_sha256":"ed2810eb536b6898d15ad1954e0ee9f44eed9cae895d07fe1340317513271821","schema_version":"1.0","event_id":"sha256:ed2810eb536b6898d15ad1954e0ee9f44eed9cae895d07fe1340317513271821"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/K5C5LQIXAOX4SAQAJWMIDIG2VV/bundle.json","state_url":"https://pith.science/pith/K5C5LQIXAOX4SAQAJWMIDIG2VV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/K5C5LQIXAOX4SAQAJWMIDIG2VV/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":"2026-05-29T22:52:03Z","links":{"resolver":"https://pith.science/pith/K5C5LQIXAOX4SAQAJWMIDIG2VV","bundle":"https://pith.science/pith/K5C5LQIXAOX4SAQAJWMIDIG2VV/bundle.json","state":"https://pith.science/pith/K5C5LQIXAOX4SAQAJWMIDIG2VV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/K5C5LQIXAOX4SAQAJWMIDIG2VV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:K5C5LQIXAOX4SAQAJWMIDIG2VV","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":"9f4ce27d67ee032b6548abe70c25151a1fb92d6482b511684ac4ddd8c03988bd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-09-07T21:52:07Z","title_canon_sha256":"bbe4dd50efdfe9ead973e5dc7542259d953a2c26706f50e22cdc432fec28abfc"},"schema_version":"1.0","source":{"id":"1609.02203","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.02203","created_at":"2026-05-18T00:59:57Z"},{"alias_kind":"arxiv_version","alias_value":"1609.02203v1","created_at":"2026-05-18T00:59:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.02203","created_at":"2026-05-18T00:59:57Z"},{"alias_kind":"pith_short_12","alias_value":"K5C5LQIXAOX4","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"K5C5LQIXAOX4SAQA","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"K5C5LQIX","created_at":"2026-05-18T12:30:25Z"}],"graph_snapshots":[{"event_id":"sha256:ed2810eb536b6898d15ad1954e0ee9f44eed9cae895d07fe1340317513271821","target":"graph","created_at":"2026-05-18T00:59:57Z","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 the first hard X-ray observations with NuSTAR of the BL Lac type blazar PKS 2155-304, augmented with soft X-ray data from XMM-Newton and gamma-ray data from the Fermi Large Area Telescope, obtained in April 2013 when the source was in a very low flux state. A joint NuSTAR and XMM spectrum, covering the energy range 0.5 - 60 keV, is best described by a model consisting of a log-parabola component with curvature beta = 0.3(+0.2,-0.1) and a (local) photon index 3.04 +/- 0.15 at photon energy of 2 keV, and a hard power-law tail with photon index 2.2 +/- 0.4. The hard X-ray tail can be sm","authors_text":"A. Hornstrup, A. K. Furniss, A. Zoglauer, B. Giebels, B. Grefenstette, C. Hailey, C. M. Urry, D. Barret, D. M. Alexander, D. Paneque, D. Sanchez, D. Stern, F. A. Harrison, F. E. Christensen, G. M. Madejski, H. Miyasaka, J. Chiang, J. E. Koglin, K. Forster, K. K. Madsen, K. Mori, K. Nalewajko, M. Ajello, M. Balokovi\\'c, M. Hayashida, M. J. Pivovaroff, M. Perri, M. Sikora, N. J. Westergaard, P. Giommi, P. H. Mao, R. D. Blandford, S. E. Boggs, S. Puccetti, T. Kitaguchi, V. Rana, W. W. Craig, W. W. Zhang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-09-07T21:52:07Z","title":"First NuSTAR observations of the BL Lac - type blazar PKS~2155-304: constraints on the jet content and distribution of radiating particles"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.02203","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":"sha256:2d120e9a009fc9d1cee48d9b5951fb7554922ba405db376d34933509cfe39155","target":"record","created_at":"2026-05-18T00:59:57Z","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":"9f4ce27d67ee032b6548abe70c25151a1fb92d6482b511684ac4ddd8c03988bd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-09-07T21:52:07Z","title_canon_sha256":"bbe4dd50efdfe9ead973e5dc7542259d953a2c26706f50e22cdc432fec28abfc"},"schema_version":"1.0","source":{"id":"1609.02203","kind":"arxiv","version":1}},"canonical_sha256":"5745d5c11703afc902004d9881a0daad43bc1443f522a3656ee40f6579865caf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5745d5c11703afc902004d9881a0daad43bc1443f522a3656ee40f6579865caf","first_computed_at":"2026-05-18T00:59:57.198766Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:59:57.198766Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MSYBsoTdiOjANlDXwtQ/9Ym3TnVPcYvyO2/8dG6lRihiG3c3ElSsCmVFBtxnSLRrk+YlQeTkfxRUUu0iqSIxAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:59:57.199268Z","signed_message":"canonical_sha256_bytes"},"source_id":"1609.02203","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2d120e9a009fc9d1cee48d9b5951fb7554922ba405db376d34933509cfe39155","sha256:ed2810eb536b6898d15ad1954e0ee9f44eed9cae895d07fe1340317513271821"],"state_sha256":"03c2adcebe671915e431d2a8d6c2e6ffd8747dc965af29230b1e5ac05bea6760"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AmUE7F/g6Up1fzago1eI0xIcXO5T5ZqLHVKFfkI9QYBH7oA2bHYVztv1a1mNWEgM2g3yG/2zx2ZisMZJDOcVBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T22:52:03.963264Z","bundle_sha256":"a099c8e1185bf1740c2e550eca632e8157e78e7924445bda185ffeed8c77bf2f"}}