{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:D2SCNNUEV6NLJH73PC6RNEVR52","short_pith_number":"pith:D2SCNNUE","canonical_record":{"source":{"id":"1203.0782","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-03-04T22:41:28Z","cross_cats_sorted":[],"title_canon_sha256":"1d1092fc4f16ef7e7efdad9eafa26fa5b60d917374c6afaa9c4eb82a7d3f7653","abstract_canon_sha256":"74628f7f2da100d8c0fe0f62e3340a8586b44203cf342fa2041dc237e33e491a"},"schema_version":"1.0"},"canonical_sha256":"1ea426b684af9ab49ffb78bd1692b1ee9542ddbbdeeb1957db8a4d93b46964ab","source":{"kind":"arxiv","id":"1203.0782","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.0782","created_at":"2026-05-18T03:41:29Z"},{"alias_kind":"arxiv_version","alias_value":"1203.0782v1","created_at":"2026-05-18T03:41:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.0782","created_at":"2026-05-18T03:41:29Z"},{"alias_kind":"pith_short_12","alias_value":"D2SCNNUEV6NL","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"D2SCNNUEV6NLJH73","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"D2SCNNUE","created_at":"2026-05-18T12:27:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:D2SCNNUEV6NLJH73PC6RNEVR52","target":"record","payload":{"canonical_record":{"source":{"id":"1203.0782","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-03-04T22:41:28Z","cross_cats_sorted":[],"title_canon_sha256":"1d1092fc4f16ef7e7efdad9eafa26fa5b60d917374c6afaa9c4eb82a7d3f7653","abstract_canon_sha256":"74628f7f2da100d8c0fe0f62e3340a8586b44203cf342fa2041dc237e33e491a"},"schema_version":"1.0"},"canonical_sha256":"1ea426b684af9ab49ffb78bd1692b1ee9542ddbbdeeb1957db8a4d93b46964ab","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:41:29.423943Z","signature_b64":"uDgjiV96iOApfmNGF+t9D/5vg6kenHO+T7HSGre1uYdHOnUriNdP3hoYSOuTFfgBl75DaldzhVPVH43BY/wBDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1ea426b684af9ab49ffb78bd1692b1ee9542ddbbdeeb1957db8a4d93b46964ab","last_reissued_at":"2026-05-18T03:41:29.423381Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:41:29.423381Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1203.0782","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":"2026-05-18T03:41:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wB61c9zAz6kzT90wx6st6l8unuaZNlVa606XLV994hX3RBlN4Dn5hjqtzCtlNy+FCf7Rg3cr520P0cp0FDQNAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T07:34:32.201122Z"},"content_sha256":"949bab81793f4ebf73a0f3d8ea8e6ad65a487f1df180cd76507ed53ba9e5beee","schema_version":"1.0","event_id":"sha256:949bab81793f4ebf73a0f3d8ea8e6ad65a487f1df180cd76507ed53ba9e5beee"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:D2SCNNUEV6NLJH73PC6RNEVR52","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Gemini/GMOS Spectroscopy of EXO 0748-676 (=UY Vol) in Outburst","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Robert I. Hynes (Louisiana State Univ.), Valerie J. Mikles","submitted_at":"2012-03-04T22:41:28Z","abstract_excerpt":"We present a phase-resolved, optical, spectroscopic study of the eclipsing low-mass X-ray binary, EXO 0748-676 = UY Vol. The sensitivity of Gemini combined with our complete phase coverage makes for the most detailed blue spectroscopic study of this source obtained during its extended twenty-four year period of activity. We identify 12 optical emission lines and present trailed spectra, tomograms, and the first modulation maps of this source in outburst. The strongest line emission originates downstream of the stream-impact point, and this component is quite variable from night-to-night. Under"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.0782","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":"2026-05-18T03:41:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Dd6BpRq+akEgWJ7Q39BfLIiogWqZmXYE3B4VAWlizx9nWFF2Sm97iZmI9Nkhb/9ZSuO4lLRBWxjmFW0r4FU0AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T07:34:32.201846Z"},"content_sha256":"772859c510854c1a756bd069dfe4c7de5539955cca539e28bc580f28f4e53802","schema_version":"1.0","event_id":"sha256:772859c510854c1a756bd069dfe4c7de5539955cca539e28bc580f28f4e53802"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/D2SCNNUEV6NLJH73PC6RNEVR52/bundle.json","state_url":"https://pith.science/pith/D2SCNNUEV6NLJH73PC6RNEVR52/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/D2SCNNUEV6NLJH73PC6RNEVR52/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":"2026-05-25T07:34:32Z","links":{"resolver":"https://pith.science/pith/D2SCNNUEV6NLJH73PC6RNEVR52","bundle":"https://pith.science/pith/D2SCNNUEV6NLJH73PC6RNEVR52/bundle.json","state":"https://pith.science/pith/D2SCNNUEV6NLJH73PC6RNEVR52/state.json","well_known_bundle":"https://pith.science/.well-known/pith/D2SCNNUEV6NLJH73PC6RNEVR52/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:D2SCNNUEV6NLJH73PC6RNEVR52","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":"74628f7f2da100d8c0fe0f62e3340a8586b44203cf342fa2041dc237e33e491a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-03-04T22:41:28Z","title_canon_sha256":"1d1092fc4f16ef7e7efdad9eafa26fa5b60d917374c6afaa9c4eb82a7d3f7653"},"schema_version":"1.0","source":{"id":"1203.0782","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.0782","created_at":"2026-05-18T03:41:29Z"},{"alias_kind":"arxiv_version","alias_value":"1203.0782v1","created_at":"2026-05-18T03:41:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.0782","created_at":"2026-05-18T03:41:29Z"},{"alias_kind":"pith_short_12","alias_value":"D2SCNNUEV6NL","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"D2SCNNUEV6NLJH73","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"D2SCNNUE","created_at":"2026-05-18T12:27:01Z"}],"graph_snapshots":[{"event_id":"sha256:772859c510854c1a756bd069dfe4c7de5539955cca539e28bc580f28f4e53802","target":"graph","created_at":"2026-05-18T03:41:29Z","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 present a phase-resolved, optical, spectroscopic study of the eclipsing low-mass X-ray binary, EXO 0748-676 = UY Vol. The sensitivity of Gemini combined with our complete phase coverage makes for the most detailed blue spectroscopic study of this source obtained during its extended twenty-four year period of activity. We identify 12 optical emission lines and present trailed spectra, tomograms, and the first modulation maps of this source in outburst. The strongest line emission originates downstream of the stream-impact point, and this component is quite variable from night-to-night. Under","authors_text":"Robert I. Hynes (Louisiana State Univ.), Valerie J. Mikles","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-03-04T22:41:28Z","title":"Gemini/GMOS Spectroscopy of EXO 0748-676 (=UY Vol) in Outburst"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.0782","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":"sha256:949bab81793f4ebf73a0f3d8ea8e6ad65a487f1df180cd76507ed53ba9e5beee","target":"record","created_at":"2026-05-18T03:41:29Z","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":"74628f7f2da100d8c0fe0f62e3340a8586b44203cf342fa2041dc237e33e491a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-03-04T22:41:28Z","title_canon_sha256":"1d1092fc4f16ef7e7efdad9eafa26fa5b60d917374c6afaa9c4eb82a7d3f7653"},"schema_version":"1.0","source":{"id":"1203.0782","kind":"arxiv","version":1}},"canonical_sha256":"1ea426b684af9ab49ffb78bd1692b1ee9542ddbbdeeb1957db8a4d93b46964ab","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1ea426b684af9ab49ffb78bd1692b1ee9542ddbbdeeb1957db8a4d93b46964ab","first_computed_at":"2026-05-18T03:41:29.423381Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:41:29.423381Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uDgjiV96iOApfmNGF+t9D/5vg6kenHO+T7HSGre1uYdHOnUriNdP3hoYSOuTFfgBl75DaldzhVPVH43BY/wBDg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:41:29.423943Z","signed_message":"canonical_sha256_bytes"},"source_id":"1203.0782","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:949bab81793f4ebf73a0f3d8ea8e6ad65a487f1df180cd76507ed53ba9e5beee","sha256:772859c510854c1a756bd069dfe4c7de5539955cca539e28bc580f28f4e53802"],"state_sha256":"08b2dedddb48a9b0a6811cae910e2b0a7e5b7fa30929fd24109c28e3334e8497"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bjP8/xnFfoaxJFPwgtMAdwwKQuDm7o2l0Yn8UpOmtkkrfF9qlKeLk9xzKGa+Qdgma8HluAmR5GFVUKCqtfk0AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T07:34:32.205447Z","bundle_sha256":"00de14561aa8ed7d7f01a1cb4c17f54a6a180e75b08859d9118dd694c4eac177"}}