{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:LLOKCW5UN2YJWQH7XDLFQY6UDI","short_pith_number":"pith:LLOKCW5U","canonical_record":{"source":{"id":"1112.4567","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-12-20T04:24:47Z","cross_cats_sorted":[],"title_canon_sha256":"1f40c16e0392a8c30aac3dce6fbe07f5169c527c0de4b90b7607a79c5ef3800e","abstract_canon_sha256":"3095935761ad347094cedb7b9db5983cd9716314a0bd26955aac69a102ceef27"},"schema_version":"1.0"},"canonical_sha256":"5adca15bb46eb09b40ffb8d65863d41a354a2a8b1c47b510bc5f33760d78cbb2","source":{"kind":"arxiv","id":"1112.4567","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1112.4567","created_at":"2026-05-18T04:00:13Z"},{"alias_kind":"arxiv_version","alias_value":"1112.4567v1","created_at":"2026-05-18T04:00:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1112.4567","created_at":"2026-05-18T04:00:13Z"},{"alias_kind":"pith_short_12","alias_value":"LLOKCW5UN2YJ","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_16","alias_value":"LLOKCW5UN2YJWQH7","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_8","alias_value":"LLOKCW5U","created_at":"2026-05-18T12:26:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:LLOKCW5UN2YJWQH7XDLFQY6UDI","target":"record","payload":{"canonical_record":{"source":{"id":"1112.4567","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-12-20T04:24:47Z","cross_cats_sorted":[],"title_canon_sha256":"1f40c16e0392a8c30aac3dce6fbe07f5169c527c0de4b90b7607a79c5ef3800e","abstract_canon_sha256":"3095935761ad347094cedb7b9db5983cd9716314a0bd26955aac69a102ceef27"},"schema_version":"1.0"},"canonical_sha256":"5adca15bb46eb09b40ffb8d65863d41a354a2a8b1c47b510bc5f33760d78cbb2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:00:13.262844Z","signature_b64":"ruM8zpLCrZraqBXEPqFmxk5NeO/8xw4BLFDviYzt73nqVQKkeARdNxyucxngK4niQh85jn763y9IR9E5/GKJDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5adca15bb46eb09b40ffb8d65863d41a354a2a8b1c47b510bc5f33760d78cbb2","last_reissued_at":"2026-05-18T04:00:13.262137Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:00:13.262137Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1112.4567","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":"2026-05-18T04:00:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zJugR1F1+KdZ/BovmG9mFsvkZ6W2ujJ5lsdRUapTFDkVudLbb4OReKCj/GGiONxwsMWPlJo6Xr0O3jpmrxZxBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T13:40:56.274708Z"},"content_sha256":"7cc352513abb7d2ce53db15a2b2e2cc058a55d2b0f5f93a9e3ee9666293554d4","schema_version":"1.0","event_id":"sha256:7cc352513abb7d2ce53db15a2b2e2cc058a55d2b0f5f93a9e3ee9666293554d4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:LLOKCW5UN2YJWQH7XDLFQY6UDI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Metallicity and Temperature Indicators in M dwarf K band Spectra: Testing New & Updated Calibrations With Observations of 133 Solar Neighborhood M dwarfs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"B\\'arbara Rojas-Ayala, James P. Lloyd, Kevin R. Covey, Philip S. Muirhead","submitted_at":"2011-12-20T04:24:47Z","abstract_excerpt":"We present K band spectra for 133 nearby (d < 33 parsecs) M dwarfs, including 18 M dwarfs with reliable metallicity estimates (as inferred from an FGK type companion), 11 M dwarf planet hosts, more than 2/3 of the M dwarfs in the Northern 8 pc sample, and several M dwarfs from the LSPM catalog. From these spectra, we measure equivalent widths of the Ca and Na lines, and a spectral index quantifying the absorption due to H2O opacity (the H2O-K2 index). Using empirical spectral types standards and synthetic models, we calibrate the H2O-K2 index as an indicator of an M dwarf's spectral type and e"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1112.4567","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":"2026-05-18T04:00:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zhsGiHoiQCNVCK7fX7BAJhihWvKoDgjmM04cABSQy9oJa/TuxXiaxabyRWelprdmkiKjAY0Kq7LeGTV43TWOCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T13:40:56.275066Z"},"content_sha256":"f2beab52ed8df14f7ee5adb9a1eb9a493504eef8db81ca8006e0b87c1ceb1a6e","schema_version":"1.0","event_id":"sha256:f2beab52ed8df14f7ee5adb9a1eb9a493504eef8db81ca8006e0b87c1ceb1a6e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LLOKCW5UN2YJWQH7XDLFQY6UDI/bundle.json","state_url":"https://pith.science/pith/LLOKCW5UN2YJWQH7XDLFQY6UDI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LLOKCW5UN2YJWQH7XDLFQY6UDI/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":"2026-05-21T13:40:56Z","links":{"resolver":"https://pith.science/pith/LLOKCW5UN2YJWQH7XDLFQY6UDI","bundle":"https://pith.science/pith/LLOKCW5UN2YJWQH7XDLFQY6UDI/bundle.json","state":"https://pith.science/pith/LLOKCW5UN2YJWQH7XDLFQY6UDI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LLOKCW5UN2YJWQH7XDLFQY6UDI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:LLOKCW5UN2YJWQH7XDLFQY6UDI","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":"3095935761ad347094cedb7b9db5983cd9716314a0bd26955aac69a102ceef27","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-12-20T04:24:47Z","title_canon_sha256":"1f40c16e0392a8c30aac3dce6fbe07f5169c527c0de4b90b7607a79c5ef3800e"},"schema_version":"1.0","source":{"id":"1112.4567","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1112.4567","created_at":"2026-05-18T04:00:13Z"},{"alias_kind":"arxiv_version","alias_value":"1112.4567v1","created_at":"2026-05-18T04:00:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1112.4567","created_at":"2026-05-18T04:00:13Z"},{"alias_kind":"pith_short_12","alias_value":"LLOKCW5UN2YJ","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_16","alias_value":"LLOKCW5UN2YJWQH7","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_8","alias_value":"LLOKCW5U","created_at":"2026-05-18T12:26:34Z"}],"graph_snapshots":[{"event_id":"sha256:f2beab52ed8df14f7ee5adb9a1eb9a493504eef8db81ca8006e0b87c1ceb1a6e","target":"graph","created_at":"2026-05-18T04:00:13Z","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 K band spectra for 133 nearby (d < 33 parsecs) M dwarfs, including 18 M dwarfs with reliable metallicity estimates (as inferred from an FGK type companion), 11 M dwarf planet hosts, more than 2/3 of the M dwarfs in the Northern 8 pc sample, and several M dwarfs from the LSPM catalog. From these spectra, we measure equivalent widths of the Ca and Na lines, and a spectral index quantifying the absorption due to H2O opacity (the H2O-K2 index). Using empirical spectral types standards and synthetic models, we calibrate the H2O-K2 index as an indicator of an M dwarf's spectral type and e","authors_text":"B\\'arbara Rojas-Ayala, James P. Lloyd, Kevin R. Covey, Philip S. Muirhead","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-12-20T04:24:47Z","title":"Metallicity and Temperature Indicators in M dwarf K band Spectra: Testing New & Updated Calibrations With Observations of 133 Solar Neighborhood M dwarfs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1112.4567","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":"sha256:7cc352513abb7d2ce53db15a2b2e2cc058a55d2b0f5f93a9e3ee9666293554d4","target":"record","created_at":"2026-05-18T04:00:13Z","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":"3095935761ad347094cedb7b9db5983cd9716314a0bd26955aac69a102ceef27","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-12-20T04:24:47Z","title_canon_sha256":"1f40c16e0392a8c30aac3dce6fbe07f5169c527c0de4b90b7607a79c5ef3800e"},"schema_version":"1.0","source":{"id":"1112.4567","kind":"arxiv","version":1}},"canonical_sha256":"5adca15bb46eb09b40ffb8d65863d41a354a2a8b1c47b510bc5f33760d78cbb2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5adca15bb46eb09b40ffb8d65863d41a354a2a8b1c47b510bc5f33760d78cbb2","first_computed_at":"2026-05-18T04:00:13.262137Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:00:13.262137Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ruM8zpLCrZraqBXEPqFmxk5NeO/8xw4BLFDviYzt73nqVQKkeARdNxyucxngK4niQh85jn763y9IR9E5/GKJDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:00:13.262844Z","signed_message":"canonical_sha256_bytes"},"source_id":"1112.4567","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7cc352513abb7d2ce53db15a2b2e2cc058a55d2b0f5f93a9e3ee9666293554d4","sha256:f2beab52ed8df14f7ee5adb9a1eb9a493504eef8db81ca8006e0b87c1ceb1a6e"],"state_sha256":"dd63061c0896948828985c6112cb9f25705a29907c51a776d8c7275eee01a204"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rPjIWTwswUdankq/7RczmU/HdXoHz1XMHwnuZrcMHYdIr/fydV5VTFOUtWqDWPYVB0tVB4gVBuzeJryNevYwDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T13:40:56.277061Z","bundle_sha256":"50b2f68379d7df284f6668a695d2687feea7e1f1c9388bf262381aa1851d9a8e"}}