{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:AYY7Y52ZIHWRMOZ3DXB4ICPZSC","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":"2ac77b226d8f1e3a312a5c6287bbf853907e8a0b419b31f67e4e35807afe6419","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-26T07:26:57Z","title_canon_sha256":"b593f87eb80ca614bbfdc815f269e56af0eb4aca9b6732d310e1a2e5e8d6a57e"},"schema_version":"1.0","source":{"id":"1502.07460","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.07460","created_at":"2026-05-18T01:40:54Z"},{"alias_kind":"arxiv_version","alias_value":"1502.07460v1","created_at":"2026-05-18T01:40:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.07460","created_at":"2026-05-18T01:40:54Z"},{"alias_kind":"pith_short_12","alias_value":"AYY7Y52ZIHWR","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"AYY7Y52ZIHWRMOZ3","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"AYY7Y52Z","created_at":"2026-05-18T12:29:14Z"}],"graph_snapshots":[{"event_id":"sha256:ea803c4e41271501fdc82c0acee0bbe4d21635f49507e46c7e1500a3425e93fc","target":"graph","created_at":"2026-05-18T01:40:54Z","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":"Based on a carefully constructed sample of dwarf stars, a new optical-near infrared photometric calibration to estimate the metallicity of late-type K and early-to-mid-type M dwarfs is presented. The calibration sample has two parts; the first part includes 18 M dwarfs with metallicities determined by high-resolution spectroscopy and the second part contains 49 dwarfs with metallicities obtained through moderate-resolution spectra. By applying this calibration to a large sample of around 1.3 million M dwarfs from the Sloan Digital Sky Survey and the Two-Micron All Sky Survey, the metallicity d","authors_text":"Michael M. De Robertis, Neda Hejazi, Peter C. Dawson","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-26T07:26:57Z","title":"Optical - Near Infrared Photometric Calibration of M-dwarf Metallicity and Its Application"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.07460","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":"sha256:14ba1bc36963d1c56e57c55d89f30fdcf3d79513be977206089de6769e28f28e","target":"record","created_at":"2026-05-18T01:40:54Z","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":"2ac77b226d8f1e3a312a5c6287bbf853907e8a0b419b31f67e4e35807afe6419","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-26T07:26:57Z","title_canon_sha256":"b593f87eb80ca614bbfdc815f269e56af0eb4aca9b6732d310e1a2e5e8d6a57e"},"schema_version":"1.0","source":{"id":"1502.07460","kind":"arxiv","version":1}},"canonical_sha256":"0631fc775941ed163b3b1dc3c409f990a443318caf5915652b7e8e7899d0f747","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0631fc775941ed163b3b1dc3c409f990a443318caf5915652b7e8e7899d0f747","first_computed_at":"2026-05-18T01:40:54.335406Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:54.335406Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LOUp5us+hgW4YAFjjuDKHp/Pn8Fqi+qb2iP4untuebtSRskgaPrhViSwKofUUv1CsVk/iURkn5aEpE5qx++SAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:54.335997Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.07460","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:14ba1bc36963d1c56e57c55d89f30fdcf3d79513be977206089de6769e28f28e","sha256:ea803c4e41271501fdc82c0acee0bbe4d21635f49507e46c7e1500a3425e93fc"],"state_sha256":"2dea05bdf70e8f13e92c90c3c4b87a81724a8c3b44b10a9b4074a99726f9c4db"}