{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:JP2KONJXQPPJJ7ACUL5N5HMGWS","short_pith_number":"pith:JP2KONJX","canonical_record":{"source":{"id":"0909.4307","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-09-23T20:55:41Z","cross_cats_sorted":[],"title_canon_sha256":"7127d412545109f51ad2ad77eb1f1bf46fe56b6462730a799692333aae8a41a3","abstract_canon_sha256":"a91aba13d3e496037d7d99f967eca3ae7232be43c2fc82fc36b6e6a059fe35f9"},"schema_version":"1.0"},"canonical_sha256":"4bf4a7353783de94fc02a2fade9d86b48924a99d05295fbabef712c5d0c3c1a7","source":{"kind":"arxiv","id":"0909.4307","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.4307","created_at":"2026-05-18T04:07:52Z"},{"alias_kind":"arxiv_version","alias_value":"0909.4307v2","created_at":"2026-05-18T04:07:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.4307","created_at":"2026-05-18T04:07:52Z"},{"alias_kind":"pith_short_12","alias_value":"JP2KONJXQPPJ","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"JP2KONJXQPPJJ7AC","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"JP2KONJX","created_at":"2026-05-18T12:26:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:JP2KONJXQPPJJ7ACUL5N5HMGWS","target":"record","payload":{"canonical_record":{"source":{"id":"0909.4307","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-09-23T20:55:41Z","cross_cats_sorted":[],"title_canon_sha256":"7127d412545109f51ad2ad77eb1f1bf46fe56b6462730a799692333aae8a41a3","abstract_canon_sha256":"a91aba13d3e496037d7d99f967eca3ae7232be43c2fc82fc36b6e6a059fe35f9"},"schema_version":"1.0"},"canonical_sha256":"4bf4a7353783de94fc02a2fade9d86b48924a99d05295fbabef712c5d0c3c1a7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:07:52.862388Z","signature_b64":"VHa/WtZUaY65Sao7Bv+R0OLK7ojFhAHnra+atr80AAp8phZRcOSfKTvKITu1qjoNkWiM5Oyth/SirFBnfbGYAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4bf4a7353783de94fc02a2fade9d86b48924a99d05295fbabef712c5d0c3c1a7","last_reissued_at":"2026-05-18T04:07:52.861797Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:07:52.861797Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0909.4307","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:07:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"e0BzJFkfKU8ZpBvdAmhvV6edaXrhEYSRl1JZj4LEwbCQS9EAi9E2hs7JlQcIn4tNJnR6ij2xF/PZDAN/jq4sBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T06:17:16.873104Z"},"content_sha256":"2c31935e1bddd9ef0acfedd1ab516641dd8875f5998313b2248396498edced61","schema_version":"1.0","event_id":"sha256:2c31935e1bddd9ef0acfedd1ab516641dd8875f5998313b2248396498edced61"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:JP2KONJXQPPJJ7ACUL5N5HMGWS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Precise mass and radius values for the white dwarf and low mass M dwarf in the pre-cataclysmic binary NN Serpentis","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"B. T. Gansicke, C. M. Copperwheat, R. Hickman, S. G. Parsons, S. P. Littlefair, T. R. Marsh, V. S. Dhillon","submitted_at":"2009-09-23T20:55:41Z","abstract_excerpt":"We derive precise system parameters for the pre-cataclysmic binary, NN Ser.\n  From light curve fitting we find an orbital inclination of i = 89.6 +/- 0.2 deg. From the HeII absorption line we find K_{WD}= 62.3 +/- 1.9 km/s. The irradiation-induced emission lines from the surface of the secondary star give a range of observed radial velocities. The corrected values give a radial velocity of K_{sec}= 301 +/- 3 km/s, with an error dominated by the systematic effects of the model. This leads to a binary separation of a = 0.934 +/- 0.009 R_{sun}, radii of R_{WD} = 0.0211 +/- 0.0002 R_{sun} and R_{s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.4307","kind":"arxiv","version":2},"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":"2026-05-18T04:07:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8Yn8EwgnI/Fxeis6tjU+C9Qaigh/Z9ga0QoU9a5NoxlyGqkXknI4/foFmTESQIhDrlmP1zeWXHysxDFFLFexBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T06:17:16.873636Z"},"content_sha256":"d59e8e57746ad9e92f30b28d51474f78a0585a486ed0d98f0bdf07f25d3d8c14","schema_version":"1.0","event_id":"sha256:d59e8e57746ad9e92f30b28d51474f78a0585a486ed0d98f0bdf07f25d3d8c14"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JP2KONJXQPPJJ7ACUL5N5HMGWS/bundle.json","state_url":"https://pith.science/pith/JP2KONJXQPPJJ7ACUL5N5HMGWS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JP2KONJXQPPJJ7ACUL5N5HMGWS/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":"2026-05-31T06:17:16Z","links":{"resolver":"https://pith.science/pith/JP2KONJXQPPJJ7ACUL5N5HMGWS","bundle":"https://pith.science/pith/JP2KONJXQPPJJ7ACUL5N5HMGWS/bundle.json","state":"https://pith.science/pith/JP2KONJXQPPJJ7ACUL5N5HMGWS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JP2KONJXQPPJJ7ACUL5N5HMGWS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:JP2KONJXQPPJJ7ACUL5N5HMGWS","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":"a91aba13d3e496037d7d99f967eca3ae7232be43c2fc82fc36b6e6a059fe35f9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-09-23T20:55:41Z","title_canon_sha256":"7127d412545109f51ad2ad77eb1f1bf46fe56b6462730a799692333aae8a41a3"},"schema_version":"1.0","source":{"id":"0909.4307","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.4307","created_at":"2026-05-18T04:07:52Z"},{"alias_kind":"arxiv_version","alias_value":"0909.4307v2","created_at":"2026-05-18T04:07:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.4307","created_at":"2026-05-18T04:07:52Z"},{"alias_kind":"pith_short_12","alias_value":"JP2KONJXQPPJ","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"JP2KONJXQPPJJ7AC","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"JP2KONJX","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:d59e8e57746ad9e92f30b28d51474f78a0585a486ed0d98f0bdf07f25d3d8c14","target":"graph","created_at":"2026-05-18T04:07:52Z","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 derive precise system parameters for the pre-cataclysmic binary, NN Ser.\n  From light curve fitting we find an orbital inclination of i = 89.6 +/- 0.2 deg. From the HeII absorption line we find K_{WD}= 62.3 +/- 1.9 km/s. The irradiation-induced emission lines from the surface of the secondary star give a range of observed radial velocities. The corrected values give a radial velocity of K_{sec}= 301 +/- 3 km/s, with an error dominated by the systematic effects of the model. This leads to a binary separation of a = 0.934 +/- 0.009 R_{sun}, radii of R_{WD} = 0.0211 +/- 0.0002 R_{sun} and R_{s","authors_text":"B. T. Gansicke, C. M. Copperwheat, R. Hickman, S. G. Parsons, S. P. Littlefair, T. R. Marsh, V. S. Dhillon","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-09-23T20:55:41Z","title":"Precise mass and radius values for the white dwarf and low mass M dwarf in the pre-cataclysmic binary NN Serpentis"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.4307","kind":"arxiv","version":2},"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":"sha256:2c31935e1bddd9ef0acfedd1ab516641dd8875f5998313b2248396498edced61","target":"record","created_at":"2026-05-18T04:07:52Z","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":"a91aba13d3e496037d7d99f967eca3ae7232be43c2fc82fc36b6e6a059fe35f9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-09-23T20:55:41Z","title_canon_sha256":"7127d412545109f51ad2ad77eb1f1bf46fe56b6462730a799692333aae8a41a3"},"schema_version":"1.0","source":{"id":"0909.4307","kind":"arxiv","version":2}},"canonical_sha256":"4bf4a7353783de94fc02a2fade9d86b48924a99d05295fbabef712c5d0c3c1a7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4bf4a7353783de94fc02a2fade9d86b48924a99d05295fbabef712c5d0c3c1a7","first_computed_at":"2026-05-18T04:07:52.861797Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:07:52.861797Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VHa/WtZUaY65Sao7Bv+R0OLK7ojFhAHnra+atr80AAp8phZRcOSfKTvKITu1qjoNkWiM5Oyth/SirFBnfbGYAw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:07:52.862388Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.4307","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2c31935e1bddd9ef0acfedd1ab516641dd8875f5998313b2248396498edced61","sha256:d59e8e57746ad9e92f30b28d51474f78a0585a486ed0d98f0bdf07f25d3d8c14"],"state_sha256":"cc60103f45dc75d1c5629c8c3773b4b6a0bfd299580749d9927042a41c0790fb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NFZL7IVmcfhOaxzRclzwwYCnswbmwi2deTyKoyzKEgUwn0eVTP/L9T+VVOWLeIgNZ8pb7HM+Yk0C5TLb6GHnBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T06:17:16.877630Z","bundle_sha256":"66281b069e16f7d6a21744de52fd16084252342ab5a5eda80bc25f17850d3267"}}