{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:6HGVQBLOFHARIXZNNZ7XOWDECN","short_pith_number":"pith:6HGVQBLO","canonical_record":{"source":{"id":"0901.3991","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-01-26T12:56:15Z","cross_cats_sorted":[],"title_canon_sha256":"4222b3ae3f1b2774be7393fc766af95c44c314e9721c5d1b2fce2b8b45c7cd2b","abstract_canon_sha256":"cb90ab5b487c33f566aa3d6f5fd73ec8fe0c58e9cdff51888b0389032d72d1ce"},"schema_version":"1.0"},"canonical_sha256":"f1cd58056e29c1145f2d6e7f775864135eea0f8079d0133eee2bc03679274f7f","source":{"kind":"arxiv","id":"0901.3991","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0901.3991","created_at":"2026-07-04T17:14:17Z"},{"alias_kind":"arxiv_version","alias_value":"0901.3991v1","created_at":"2026-07-04T17:14:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0901.3991","created_at":"2026-07-04T17:14:17Z"},{"alias_kind":"pith_short_12","alias_value":"6HGVQBLOFHAR","created_at":"2026-07-04T17:14:17Z"},{"alias_kind":"pith_short_16","alias_value":"6HGVQBLOFHARIXZN","created_at":"2026-07-04T17:14:17Z"},{"alias_kind":"pith_short_8","alias_value":"6HGVQBLO","created_at":"2026-07-04T17:14:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:6HGVQBLOFHARIXZNNZ7XOWDECN","target":"record","payload":{"canonical_record":{"source":{"id":"0901.3991","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-01-26T12:56:15Z","cross_cats_sorted":[],"title_canon_sha256":"4222b3ae3f1b2774be7393fc766af95c44c314e9721c5d1b2fce2b8b45c7cd2b","abstract_canon_sha256":"cb90ab5b487c33f566aa3d6f5fd73ec8fe0c58e9cdff51888b0389032d72d1ce"},"schema_version":"1.0"},"canonical_sha256":"f1cd58056e29c1145f2d6e7f775864135eea0f8079d0133eee2bc03679274f7f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:14:17.889414Z","signature_b64":"U5K7mkW+EMpgy/4zZ9AleXRraY9raIETFll57XIOwYaAE5+YhrfwjnTAl6+x6M5Ftf9ExPQs/Lt139oC4D4jAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f1cd58056e29c1145f2d6e7f775864135eea0f8079d0133eee2bc03679274f7f","last_reissued_at":"2026-07-04T17:14:17.888999Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:14:17.888999Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0901.3991","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":"2026-07-04T17:14:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Nzso9qfoxers1M+ep/ZHbreoNAlXIB072IibiRK+fW590W0rfSbIhvWYHn1hWoJd1P0+E13N5MGW31CuxWgOBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-22T17:28:31.600135Z"},"content_sha256":"69c69e2b3d3a18e98d2ecaee35f56c96aa50cd4f34ca78518ab282f2e5e3b416","schema_version":"1.0","event_id":"sha256:69c69e2b3d3a18e98d2ecaee35f56c96aa50cd4f34ca78518ab282f2e5e3b416"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:6HGVQBLOFHARIXZNNZ7XOWDECN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical spectroscopy and photometry of SAX J1808.4-3658 in outburst","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"B. Nord, D. J. Hurley, D. L. DePoy, D. M. Russell, F. Lewis, G. Ramsay, M. T. Reynolds, P. Elebert, P. Hakala, P. J. Callanan, S. R. Kane","submitted_at":"2009-01-26T12:56:15Z","abstract_excerpt":"We present phase resolved optical spectroscopy and photometry of V4580 Sagittarii, the optical counterpart to the accretion powered millisecond pulsar SAX J1808.4-3658, obtained during the 2008 September/October outburst. Doppler tomography of the N III 4640.64 Bowen blend emission line reveals a focused spot of emission at a location consistent with the secondary star. The velocity of this emission occurs at 324 +/- 15 km/s; applying a \"K-correction\", we find the velocity of the secondary star projected onto the line of sight to be 370 +/- 40 km/s. Based on existing pulse timing measurements,"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0901.3991","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/0901.3991/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":"2026-07-04T17:14:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SV2ggkYQkArqp541kSFVqltBNzD8R2gGJh9UDdTZ//LMMc1QcRKUezINLSIU+iNBXhAkDmkpOjmXFHvDdE2sCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-22T17:28:31.600520Z"},"content_sha256":"528ac302be007b41bb2319a3789db4055c8175a578504ff686f5243c27323c74","schema_version":"1.0","event_id":"sha256:528ac302be007b41bb2319a3789db4055c8175a578504ff686f5243c27323c74"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6HGVQBLOFHARIXZNNZ7XOWDECN/bundle.json","state_url":"https://pith.science/pith/6HGVQBLOFHARIXZNNZ7XOWDECN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6HGVQBLOFHARIXZNNZ7XOWDECN/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":"2026-07-22T17:28:31Z","links":{"resolver":"https://pith.science/pith/6HGVQBLOFHARIXZNNZ7XOWDECN","bundle":"https://pith.science/pith/6HGVQBLOFHARIXZNNZ7XOWDECN/bundle.json","state":"https://pith.science/pith/6HGVQBLOFHARIXZNNZ7XOWDECN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6HGVQBLOFHARIXZNNZ7XOWDECN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:6HGVQBLOFHARIXZNNZ7XOWDECN","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":"cb90ab5b487c33f566aa3d6f5fd73ec8fe0c58e9cdff51888b0389032d72d1ce","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-01-26T12:56:15Z","title_canon_sha256":"4222b3ae3f1b2774be7393fc766af95c44c314e9721c5d1b2fce2b8b45c7cd2b"},"schema_version":"1.0","source":{"id":"0901.3991","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0901.3991","created_at":"2026-07-04T17:14:17Z"},{"alias_kind":"arxiv_version","alias_value":"0901.3991v1","created_at":"2026-07-04T17:14:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0901.3991","created_at":"2026-07-04T17:14:17Z"},{"alias_kind":"pith_short_12","alias_value":"6HGVQBLOFHAR","created_at":"2026-07-04T17:14:17Z"},{"alias_kind":"pith_short_16","alias_value":"6HGVQBLOFHARIXZN","created_at":"2026-07-04T17:14:17Z"},{"alias_kind":"pith_short_8","alias_value":"6HGVQBLO","created_at":"2026-07-04T17:14:17Z"}],"graph_snapshots":[{"event_id":"sha256:528ac302be007b41bb2319a3789db4055c8175a578504ff686f5243c27323c74","target":"graph","created_at":"2026-07-04T17:14:17Z","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/0901.3991/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present phase resolved optical spectroscopy and photometry of V4580 Sagittarii, the optical counterpart to the accretion powered millisecond pulsar SAX J1808.4-3658, obtained during the 2008 September/October outburst. Doppler tomography of the N III 4640.64 Bowen blend emission line reveals a focused spot of emission at a location consistent with the secondary star. The velocity of this emission occurs at 324 +/- 15 km/s; applying a \"K-correction\", we find the velocity of the secondary star projected onto the line of sight to be 370 +/- 40 km/s. Based on existing pulse timing measurements,","authors_text":"B. Nord, D. J. Hurley, D. L. DePoy, D. M. Russell, F. Lewis, G. Ramsay, M. T. Reynolds, P. Elebert, P. Hakala, P. J. Callanan, S. R. Kane","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-01-26T12:56:15Z","title":"Optical spectroscopy and photometry of SAX J1808.4-3658 in outburst"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0901.3991","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":"sha256:69c69e2b3d3a18e98d2ecaee35f56c96aa50cd4f34ca78518ab282f2e5e3b416","target":"record","created_at":"2026-07-04T17:14:17Z","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":"cb90ab5b487c33f566aa3d6f5fd73ec8fe0c58e9cdff51888b0389032d72d1ce","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-01-26T12:56:15Z","title_canon_sha256":"4222b3ae3f1b2774be7393fc766af95c44c314e9721c5d1b2fce2b8b45c7cd2b"},"schema_version":"1.0","source":{"id":"0901.3991","kind":"arxiv","version":1}},"canonical_sha256":"f1cd58056e29c1145f2d6e7f775864135eea0f8079d0133eee2bc03679274f7f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f1cd58056e29c1145f2d6e7f775864135eea0f8079d0133eee2bc03679274f7f","first_computed_at":"2026-07-04T17:14:17.888999Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:14:17.888999Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"U5K7mkW+EMpgy/4zZ9AleXRraY9raIETFll57XIOwYaAE5+YhrfwjnTAl6+x6M5Ftf9ExPQs/Lt139oC4D4jAg==","signature_status":"signed_v1","signed_at":"2026-07-04T17:14:17.889414Z","signed_message":"canonical_sha256_bytes"},"source_id":"0901.3991","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:69c69e2b3d3a18e98d2ecaee35f56c96aa50cd4f34ca78518ab282f2e5e3b416","sha256:528ac302be007b41bb2319a3789db4055c8175a578504ff686f5243c27323c74"],"state_sha256":"fc1c73e92c0166faf945144ae88cfc0011c4356c83a7d6ff9fac0f227132d9af"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LYFVjwxGOPfkcNcf3PSlJ754dA7eASwmpRLRWhp4yv2T3PerdeSw3upEgXZqckf1RAUw95++5nbe0ccPCOHDBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-22T17:28:31.602652Z","bundle_sha256":"a7b659ff77f500369a5a012e47c0ad2d4db4bacb7f60d58815c8156992179cbe"}}