{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:LJRSS7VVEIIUFBSBHV324OXKLG","short_pith_number":"pith:LJRSS7VV","canonical_record":{"source":{"id":"2010.15176","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-10-28T18:38:19Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"7c98eb3b850cf4da61c04775682a13bb15b8a99e1f192f9439109d7bf4f6ba98","abstract_canon_sha256":"26ccbd4f2dba7ca834593673399e737add6fb702bd2c7dabcde54f85869d570b"},"schema_version":"1.0"},"canonical_sha256":"5a63297eb522114286413d77ae3aea598232523e776cba5cc205f841612a5650","source":{"kind":"arxiv","id":"2010.15176","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2010.15176","created_at":"2026-07-05T02:01:16Z"},{"alias_kind":"arxiv_version","alias_value":"2010.15176v1","created_at":"2026-07-05T02:01:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2010.15176","created_at":"2026-07-05T02:01:16Z"},{"alias_kind":"pith_short_12","alias_value":"LJRSS7VVEIIU","created_at":"2026-07-05T02:01:16Z"},{"alias_kind":"pith_short_16","alias_value":"LJRSS7VVEIIUFBSB","created_at":"2026-07-05T02:01:16Z"},{"alias_kind":"pith_short_8","alias_value":"LJRSS7VV","created_at":"2026-07-05T02:01:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:LJRSS7VVEIIUFBSBHV324OXKLG","target":"record","payload":{"canonical_record":{"source":{"id":"2010.15176","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-10-28T18:38:19Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"7c98eb3b850cf4da61c04775682a13bb15b8a99e1f192f9439109d7bf4f6ba98","abstract_canon_sha256":"26ccbd4f2dba7ca834593673399e737add6fb702bd2c7dabcde54f85869d570b"},"schema_version":"1.0"},"canonical_sha256":"5a63297eb522114286413d77ae3aea598232523e776cba5cc205f841612a5650","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:01:16.760266Z","signature_b64":"Z3VhbugL7f3SwVNY6kVnEK1xnaYka1hCrLfsLJyZadM+RvKxgHCyW1lxZmkY3YGAGwSugG/ltzsLDnFPv97lCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5a63297eb522114286413d77ae3aea598232523e776cba5cc205f841612a5650","last_reissued_at":"2026-07-05T02:01:16.759810Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:01:16.759810Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2010.15176","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":"2026-07-05T02:01:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"V5TKnN3VW36X+4Ku+HSBaAm8LTb7sgac85MfHRS1tO92lTWNJk2ACbEVotqZRPxUiyy57PrF3jMcWMbQhuV6DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T11:05:23.362982Z"},"content_sha256":"c2825373bbda90b5647b8b75229856a7d780d1744361711f9d1c595099299dca","schema_version":"1.0","event_id":"sha256:c2825373bbda90b5647b8b75229856a7d780d1744361711f9d1c595099299dca"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:LJRSS7VVEIIUFBSBHV324OXKLG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Probing jet launching in neutron star X-ray binaries: the variable and polarized jet of SAX J1808.4-3658","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"A. J. Goodwin, A. Johar, A. Miraval Zanon, D. M. Bramich, D. M. Russell, F. Lewis, J. Homan, M. C. Baglio, N. Masetti, P. D'Avanzo, P. Goldoni, P. Saikia, R. P. Fender, S. Campana, S. Covino, S. Crespi, S. E. Motta, T. Mu\\~noz-Darias, T. Shahbaz","submitted_at":"2020-10-28T18:38:19Z","abstract_excerpt":"We report on an optical photometric and polarimetric campaign on the accreting millisecond X-ray pulsar (AMXP) SAX J1808.4-3658 during its 2019 outburst. The emergence of a low-frequency excess in the spectral energy distribution in the form of a red excess above the disc spectrum (seen most prominently in z, i and R-bands) is observed as the outburst evolves. This is indicative of optically thin synchrotron emission due to a jet, as seen previously in this source and in other AMXPs during outburst. At the end of the outburst decay, the source entered a reflaring state. The low-frequency exces"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2010.15176","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/2010.15176/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":"2026-07-05T02:01:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HcOxdeOTDk6hCCoFXbdMiyopv131c/3J3GMoYhY/wFxWQXsnOZAQFdWoxGtfDFAz8raVp6ty915SeFgrs/M5DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T11:05:23.363377Z"},"content_sha256":"4f7bcdb28738e57bda23be6399b233df5601a0762492dbd71f1ba0bb634c7988","schema_version":"1.0","event_id":"sha256:4f7bcdb28738e57bda23be6399b233df5601a0762492dbd71f1ba0bb634c7988"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LJRSS7VVEIIUFBSBHV324OXKLG/bundle.json","state_url":"https://pith.science/pith/LJRSS7VVEIIUFBSBHV324OXKLG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LJRSS7VVEIIUFBSBHV324OXKLG/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":"2026-07-07T11:05:23Z","links":{"resolver":"https://pith.science/pith/LJRSS7VVEIIUFBSBHV324OXKLG","bundle":"https://pith.science/pith/LJRSS7VVEIIUFBSBHV324OXKLG/bundle.json","state":"https://pith.science/pith/LJRSS7VVEIIUFBSBHV324OXKLG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LJRSS7VVEIIUFBSBHV324OXKLG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:LJRSS7VVEIIUFBSBHV324OXKLG","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":"26ccbd4f2dba7ca834593673399e737add6fb702bd2c7dabcde54f85869d570b","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-10-28T18:38:19Z","title_canon_sha256":"7c98eb3b850cf4da61c04775682a13bb15b8a99e1f192f9439109d7bf4f6ba98"},"schema_version":"1.0","source":{"id":"2010.15176","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2010.15176","created_at":"2026-07-05T02:01:16Z"},{"alias_kind":"arxiv_version","alias_value":"2010.15176v1","created_at":"2026-07-05T02:01:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2010.15176","created_at":"2026-07-05T02:01:16Z"},{"alias_kind":"pith_short_12","alias_value":"LJRSS7VVEIIU","created_at":"2026-07-05T02:01:16Z"},{"alias_kind":"pith_short_16","alias_value":"LJRSS7VVEIIUFBSB","created_at":"2026-07-05T02:01:16Z"},{"alias_kind":"pith_short_8","alias_value":"LJRSS7VV","created_at":"2026-07-05T02:01:16Z"}],"graph_snapshots":[{"event_id":"sha256:4f7bcdb28738e57bda23be6399b233df5601a0762492dbd71f1ba0bb634c7988","target":"graph","created_at":"2026-07-05T02:01:16Z","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/2010.15176/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report on an optical photometric and polarimetric campaign on the accreting millisecond X-ray pulsar (AMXP) SAX J1808.4-3658 during its 2019 outburst. The emergence of a low-frequency excess in the spectral energy distribution in the form of a red excess above the disc spectrum (seen most prominently in z, i and R-bands) is observed as the outburst evolves. This is indicative of optically thin synchrotron emission due to a jet, as seen previously in this source and in other AMXPs during outburst. At the end of the outburst decay, the source entered a reflaring state. The low-frequency exces","authors_text":"A. J. Goodwin, A. Johar, A. Miraval Zanon, D. M. Bramich, D. M. Russell, F. Lewis, J. Homan, M. C. Baglio, N. Masetti, P. D'Avanzo, P. Goldoni, P. Saikia, R. P. Fender, S. Campana, S. Covino, S. Crespi, S. E. Motta, T. Mu\\~noz-Darias, T. Shahbaz","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-10-28T18:38:19Z","title":"Probing jet launching in neutron star X-ray binaries: the variable and polarized jet of SAX J1808.4-3658"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2010.15176","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:c2825373bbda90b5647b8b75229856a7d780d1744361711f9d1c595099299dca","target":"record","created_at":"2026-07-05T02:01:16Z","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":"26ccbd4f2dba7ca834593673399e737add6fb702bd2c7dabcde54f85869d570b","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-10-28T18:38:19Z","title_canon_sha256":"7c98eb3b850cf4da61c04775682a13bb15b8a99e1f192f9439109d7bf4f6ba98"},"schema_version":"1.0","source":{"id":"2010.15176","kind":"arxiv","version":1}},"canonical_sha256":"5a63297eb522114286413d77ae3aea598232523e776cba5cc205f841612a5650","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5a63297eb522114286413d77ae3aea598232523e776cba5cc205f841612a5650","first_computed_at":"2026-07-05T02:01:16.759810Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:01:16.759810Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Z3VhbugL7f3SwVNY6kVnEK1xnaYka1hCrLfsLJyZadM+RvKxgHCyW1lxZmkY3YGAGwSugG/ltzsLDnFPv97lCA==","signature_status":"signed_v1","signed_at":"2026-07-05T02:01:16.760266Z","signed_message":"canonical_sha256_bytes"},"source_id":"2010.15176","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c2825373bbda90b5647b8b75229856a7d780d1744361711f9d1c595099299dca","sha256:4f7bcdb28738e57bda23be6399b233df5601a0762492dbd71f1ba0bb634c7988"],"state_sha256":"00418d74bec4e7bbda0acc7654fb31deb45ca64cb2d5b21ca2f5c26e5f16c04d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hCQrGmwGe5E6FawwG/LZViE8vgMIgUJ8UDD7R73fKHv1zp5jLK1o3owGtHWaVtWBSjhbNBVuxalb8fOzbiJYCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T11:05:23.366039Z","bundle_sha256":"9486240cb73340c3b86a8cf751777eec4b06561c2765fecfdb86406b93103a76"}}