{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1998:OSJ7TQ4UQO5S7FWF5L5TJULMDK","short_pith_number":"pith:OSJ7TQ4U","canonical_record":{"source":{"id":"astro-ph/9806141","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1998-06-10T12:15:14Z","cross_cats_sorted":[],"title_canon_sha256":"b1a63503987fbf5de80df5a9233896db8006aaebe12781df596328f6e321ef5a","abstract_canon_sha256":"77f5b7b22872c53769f3262fb0eb15a1a93aab1a51e02ebd0513369290571bdf"},"schema_version":"1.0"},"canonical_sha256":"7493f9c39483bb2f96c5eafb34d16c1a8cf7a8cdeec07b54abe42a567ab2872d","source":{"kind":"arxiv","id":"astro-ph/9806141","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9806141","created_at":"2026-07-04T14:15:51Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9806141v1","created_at":"2026-07-04T14:15:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9806141","created_at":"2026-07-04T14:15:51Z"},{"alias_kind":"pith_short_12","alias_value":"OSJ7TQ4UQO5S","created_at":"2026-07-04T14:15:51Z"},{"alias_kind":"pith_short_16","alias_value":"OSJ7TQ4UQO5S7FWF","created_at":"2026-07-04T14:15:51Z"},{"alias_kind":"pith_short_8","alias_value":"OSJ7TQ4U","created_at":"2026-07-04T14:15:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1998:OSJ7TQ4UQO5S7FWF5L5TJULMDK","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9806141","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1998-06-10T12:15:14Z","cross_cats_sorted":[],"title_canon_sha256":"b1a63503987fbf5de80df5a9233896db8006aaebe12781df596328f6e321ef5a","abstract_canon_sha256":"77f5b7b22872c53769f3262fb0eb15a1a93aab1a51e02ebd0513369290571bdf"},"schema_version":"1.0"},"canonical_sha256":"7493f9c39483bb2f96c5eafb34d16c1a8cf7a8cdeec07b54abe42a567ab2872d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T14:15:51.729710Z","signature_b64":"8wHWAfIkBizLF9J6Hns5fFcyFu0PJmeEO18vJ2LvJwZ97BM2now0piftrrhFHBE1fA2fFBHGHQtmzE+Ev784DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7493f9c39483bb2f96c5eafb34d16c1a8cf7a8cdeec07b54abe42a567ab2872d","last_reissued_at":"2026-07-04T14:15:51.729300Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T14:15:51.729300Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9806141","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":"2026-07-04T14:15:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ye2sBFZ6od5NwRr171R169xlwAivH7u2Bgh0o6Lolo4MY+ab5taWqvtlCv0U7JkHrb/gi7GUbmAwc9tQKvjjCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T20:12:39.305241Z"},"content_sha256":"4dc805fdadd0a29d48a092f53170191040a46ab6eb34768c8b184e36f26e8aa1","schema_version":"1.0","event_id":"sha256:4dc805fdadd0a29d48a092f53170191040a46ab6eb34768c8b184e36f26e8aa1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1998:OSJ7TQ4UQO5S7FWF5L5TJULMDK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fast maximum entropy Doppler mapping","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"H.C. Spruit","submitted_at":"1998-06-10T12:15:14Z","abstract_excerpt":"A numerical code is described for constructing Doppler maps from the orbital variation of line profiles of (mass transfering) binaries. It uses an algorithm related to Richardson-Lucy iteration, and is much faster than the standard algorithm used for ME problems. The method has been tested on data of cataclysmic variables (including WZ Sge and SS Cyg), producing maps of up to 300X300 points. It includes an IDL-based set of routines for manipulating and plotting the input and output data, and can be downloaded from http://www.mpa-garching.mpg.de/~henk"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9806141","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/astro-ph/9806141/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":"2026-07-04T14:15:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m9165sdZOS+eIXa9ZOie2TMi2l+vdhJtpYn7o+N6uFFLnIS0PMsiQI2EJB6sBw53uxkpv9E2b+GHIs1ctFEXDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T20:12:39.306139Z"},"content_sha256":"51fa935e3fc2221e6f834204ae810ac0abf876b652bab6d330ada2d1a2e18d97","schema_version":"1.0","event_id":"sha256:51fa935e3fc2221e6f834204ae810ac0abf876b652bab6d330ada2d1a2e18d97"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OSJ7TQ4UQO5S7FWF5L5TJULMDK/bundle.json","state_url":"https://pith.science/pith/OSJ7TQ4UQO5S7FWF5L5TJULMDK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OSJ7TQ4UQO5S7FWF5L5TJULMDK/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":"2026-08-13T20:12:39Z","links":{"resolver":"https://pith.science/pith/OSJ7TQ4UQO5S7FWF5L5TJULMDK","bundle":"https://pith.science/pith/OSJ7TQ4UQO5S7FWF5L5TJULMDK/bundle.json","state":"https://pith.science/pith/OSJ7TQ4UQO5S7FWF5L5TJULMDK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OSJ7TQ4UQO5S7FWF5L5TJULMDK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1998:OSJ7TQ4UQO5S7FWF5L5TJULMDK","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":"77f5b7b22872c53769f3262fb0eb15a1a93aab1a51e02ebd0513369290571bdf","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-06-10T12:15:14Z","title_canon_sha256":"b1a63503987fbf5de80df5a9233896db8006aaebe12781df596328f6e321ef5a"},"schema_version":"1.0","source":{"id":"astro-ph/9806141","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9806141","created_at":"2026-07-04T14:15:51Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9806141v1","created_at":"2026-07-04T14:15:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9806141","created_at":"2026-07-04T14:15:51Z"},{"alias_kind":"pith_short_12","alias_value":"OSJ7TQ4UQO5S","created_at":"2026-07-04T14:15:51Z"},{"alias_kind":"pith_short_16","alias_value":"OSJ7TQ4UQO5S7FWF","created_at":"2026-07-04T14:15:51Z"},{"alias_kind":"pith_short_8","alias_value":"OSJ7TQ4U","created_at":"2026-07-04T14:15:51Z"}],"graph_snapshots":[{"event_id":"sha256:51fa935e3fc2221e6f834204ae810ac0abf876b652bab6d330ada2d1a2e18d97","target":"graph","created_at":"2026-07-04T14:15:51Z","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/astro-ph/9806141/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A numerical code is described for constructing Doppler maps from the orbital variation of line profiles of (mass transfering) binaries. It uses an algorithm related to Richardson-Lucy iteration, and is much faster than the standard algorithm used for ME problems. The method has been tested on data of cataclysmic variables (including WZ Sge and SS Cyg), producing maps of up to 300X300 points. It includes an IDL-based set of routines for manipulating and plotting the input and output data, and can be downloaded from http://www.mpa-garching.mpg.de/~henk","authors_text":"H.C. Spruit","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1998-06-10T12:15:14Z","title":"Fast maximum entropy Doppler mapping"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9806141","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":"sha256:4dc805fdadd0a29d48a092f53170191040a46ab6eb34768c8b184e36f26e8aa1","target":"record","created_at":"2026-07-04T14:15:51Z","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":"77f5b7b22872c53769f3262fb0eb15a1a93aab1a51e02ebd0513369290571bdf","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-06-10T12:15:14Z","title_canon_sha256":"b1a63503987fbf5de80df5a9233896db8006aaebe12781df596328f6e321ef5a"},"schema_version":"1.0","source":{"id":"astro-ph/9806141","kind":"arxiv","version":1}},"canonical_sha256":"7493f9c39483bb2f96c5eafb34d16c1a8cf7a8cdeec07b54abe42a567ab2872d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7493f9c39483bb2f96c5eafb34d16c1a8cf7a8cdeec07b54abe42a567ab2872d","first_computed_at":"2026-07-04T14:15:51.729300Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:15:51.729300Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8wHWAfIkBizLF9J6Hns5fFcyFu0PJmeEO18vJ2LvJwZ97BM2now0piftrrhFHBE1fA2fFBHGHQtmzE+Ev784DA==","signature_status":"signed_v1","signed_at":"2026-07-04T14:15:51.729710Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9806141","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4dc805fdadd0a29d48a092f53170191040a46ab6eb34768c8b184e36f26e8aa1","sha256:51fa935e3fc2221e6f834204ae810ac0abf876b652bab6d330ada2d1a2e18d97"],"state_sha256":"658857183140cb10db374a5ca2a35704b8257693383bb4fe4a0cb38d5b06a64d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tH9dtsVcHnGeyTd+VBIgmSy0TigdL7q69z/JDxL7JiCLX1Zbh3OgG0GikkbdnXcDUk7j72WolN7kqinZFbkpBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-13T20:12:39.317365Z","bundle_sha256":"1d85ae602bbc8d0732669282f9171e10ca56bd00fede7964894cc7062f403b7c"}}