{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:OYL2WM7JQYOD4GA2TS7RBIXEXC","short_pith_number":"pith:OYL2WM7J","canonical_record":{"source":{"id":"1006.2850","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2010-06-14T21:31:39Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"1b3484789674cbfcd712bd9b23c098c268f4cecd2840b172e10dae87d51db64b","abstract_canon_sha256":"ac021d2d58522f0ea31e5bd1be80c6dcac6ec90d8353fc04df1e34295bc6abd7"},"schema_version":"1.0"},"canonical_sha256":"7617ab33e9861c3e181a9cbf10a2e4b88f1acbae30bfae4834db710d2817621d","source":{"kind":"arxiv","id":"1006.2850","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1006.2850","created_at":"2026-05-18T02:06:53Z"},{"alias_kind":"arxiv_version","alias_value":"1006.2850v1","created_at":"2026-05-18T02:06:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1006.2850","created_at":"2026-05-18T02:06:53Z"},{"alias_kind":"pith_short_12","alias_value":"OYL2WM7JQYOD","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_16","alias_value":"OYL2WM7JQYOD4GA2","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_8","alias_value":"OYL2WM7J","created_at":"2026-05-18T12:26:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:OYL2WM7JQYOD4GA2TS7RBIXEXC","target":"record","payload":{"canonical_record":{"source":{"id":"1006.2850","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2010-06-14T21:31:39Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"1b3484789674cbfcd712bd9b23c098c268f4cecd2840b172e10dae87d51db64b","abstract_canon_sha256":"ac021d2d58522f0ea31e5bd1be80c6dcac6ec90d8353fc04df1e34295bc6abd7"},"schema_version":"1.0"},"canonical_sha256":"7617ab33e9861c3e181a9cbf10a2e4b88f1acbae30bfae4834db710d2817621d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:06:53.562686Z","signature_b64":"Ye/FDLrvyT4Yf7hCpjm/ZrteL23mKBBY0uU4a1PT67DfIFInVIbH9Vzhfj66nYbTQaplg1x5bxx0SzjhoX2EAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7617ab33e9861c3e181a9cbf10a2e4b88f1acbae30bfae4834db710d2817621d","last_reissued_at":"2026-05-18T02:06:53.562001Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:06:53.562001Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1006.2850","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":"2026-05-18T02:06:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R8RvsMG0WtUxbgqt1LZuHfhnCxPpbfOdLE+NolW/XryfiSmKbOFdoXtjA5sE4Ts01Xsd0iw8JF6zlS02weD4Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T04:22:03.851511Z"},"content_sha256":"88bcf163509ad0786fa3b289e49a6fe69bf84fce4292aa2639d081809ed081db","schema_version":"1.0","event_id":"sha256:88bcf163509ad0786fa3b289e49a6fe69bf84fce4292aa2639d081809ed081db"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:OYL2WM7JQYOD4GA2TS7RBIXEXC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Physically-Motivated Photometric Calibration of M Dwarf Metallicity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"Gregory Laughlin, Kevin C. Schlaufman","submitted_at":"2010-06-14T21:31:39Z","abstract_excerpt":"The location of M dwarfs in the V-K_s--M_Ks color-magnitude diagram (CMD) has been shown to correlate with metallicity. We demonstrate that previous empirical photometric calibrations of M dwarf metallicity exploiting this correlation systematically underestimate or overestimate metallicity at the extremes of their range. We improve upon previous calibrations in three ways. We use both a volume-limited and kinematically-matched sample of F and G dwarfs from the Geneva-Copehnagen Survey (GCS) to infer the mean metallicity of M dwarfs in the Solar Neighborhood, we use theoretical models of M dwa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1006.2850","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":"2026-05-18T02:06:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zWnGTDjUacdX3ydY9chncPdms3YDP0B2j0LhelSpRb38Bw3qyR7dBet8fVAtPkJw1VUjT0fHVGxrc4agg3ltCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T04:22:03.852166Z"},"content_sha256":"ea13b9570e546196c1b7f7b32d4f235d19483bd35c5cd5c324d33ebb611fafdf","schema_version":"1.0","event_id":"sha256:ea13b9570e546196c1b7f7b32d4f235d19483bd35c5cd5c324d33ebb611fafdf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OYL2WM7JQYOD4GA2TS7RBIXEXC/bundle.json","state_url":"https://pith.science/pith/OYL2WM7JQYOD4GA2TS7RBIXEXC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OYL2WM7JQYOD4GA2TS7RBIXEXC/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":"2026-05-27T04:22:03Z","links":{"resolver":"https://pith.science/pith/OYL2WM7JQYOD4GA2TS7RBIXEXC","bundle":"https://pith.science/pith/OYL2WM7JQYOD4GA2TS7RBIXEXC/bundle.json","state":"https://pith.science/pith/OYL2WM7JQYOD4GA2TS7RBIXEXC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OYL2WM7JQYOD4GA2TS7RBIXEXC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:OYL2WM7JQYOD4GA2TS7RBIXEXC","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":"ac021d2d58522f0ea31e5bd1be80c6dcac6ec90d8353fc04df1e34295bc6abd7","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2010-06-14T21:31:39Z","title_canon_sha256":"1b3484789674cbfcd712bd9b23c098c268f4cecd2840b172e10dae87d51db64b"},"schema_version":"1.0","source":{"id":"1006.2850","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1006.2850","created_at":"2026-05-18T02:06:53Z"},{"alias_kind":"arxiv_version","alias_value":"1006.2850v1","created_at":"2026-05-18T02:06:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1006.2850","created_at":"2026-05-18T02:06:53Z"},{"alias_kind":"pith_short_12","alias_value":"OYL2WM7JQYOD","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_16","alias_value":"OYL2WM7JQYOD4GA2","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_8","alias_value":"OYL2WM7J","created_at":"2026-05-18T12:26:12Z"}],"graph_snapshots":[{"event_id":"sha256:ea13b9570e546196c1b7f7b32d4f235d19483bd35c5cd5c324d33ebb611fafdf","target":"graph","created_at":"2026-05-18T02:06:53Z","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":"The location of M dwarfs in the V-K_s--M_Ks color-magnitude diagram (CMD) has been shown to correlate with metallicity. We demonstrate that previous empirical photometric calibrations of M dwarf metallicity exploiting this correlation systematically underestimate or overestimate metallicity at the extremes of their range. We improve upon previous calibrations in three ways. We use both a volume-limited and kinematically-matched sample of F and G dwarfs from the Geneva-Copehnagen Survey (GCS) to infer the mean metallicity of M dwarfs in the Solar Neighborhood, we use theoretical models of M dwa","authors_text":"Gregory Laughlin, Kevin C. Schlaufman","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2010-06-14T21:31:39Z","title":"A Physically-Motivated Photometric Calibration of M Dwarf Metallicity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1006.2850","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":"sha256:88bcf163509ad0786fa3b289e49a6fe69bf84fce4292aa2639d081809ed081db","target":"record","created_at":"2026-05-18T02:06:53Z","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":"ac021d2d58522f0ea31e5bd1be80c6dcac6ec90d8353fc04df1e34295bc6abd7","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2010-06-14T21:31:39Z","title_canon_sha256":"1b3484789674cbfcd712bd9b23c098c268f4cecd2840b172e10dae87d51db64b"},"schema_version":"1.0","source":{"id":"1006.2850","kind":"arxiv","version":1}},"canonical_sha256":"7617ab33e9861c3e181a9cbf10a2e4b88f1acbae30bfae4834db710d2817621d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7617ab33e9861c3e181a9cbf10a2e4b88f1acbae30bfae4834db710d2817621d","first_computed_at":"2026-05-18T02:06:53.562001Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:06:53.562001Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ye/FDLrvyT4Yf7hCpjm/ZrteL23mKBBY0uU4a1PT67DfIFInVIbH9Vzhfj66nYbTQaplg1x5bxx0SzjhoX2EAA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:06:53.562686Z","signed_message":"canonical_sha256_bytes"},"source_id":"1006.2850","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:88bcf163509ad0786fa3b289e49a6fe69bf84fce4292aa2639d081809ed081db","sha256:ea13b9570e546196c1b7f7b32d4f235d19483bd35c5cd5c324d33ebb611fafdf"],"state_sha256":"d319cb11925bb90ec9f09cba7c91832b2c99d437b9772df81cb5c9f78af8c7ce"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4sqoXNBRTnCRzcoKEccosUV80Hj+IvX8m34kYkOPa5IRFFDEFPTWzFSI+DQaspzsv01w8WwVWk1tUTvmQcoODw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T04:22:03.855426Z","bundle_sha256":"9bd48ec4d4fca4640f4fd0c3929cff60303ec64d52933de78eeff51b6a42b7c9"}}