{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:KT4Y7H6RFG34RVKDKGE6MZLUZU","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":"bcff620109dead8a9ebb91bb9edc5fa9ad58067234b1febb457eded836cfc781","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-21T11:38:37Z","title_canon_sha256":"91bb2e21de0a675acc3a46e79dadd86614b994de8b47e46c315d3b4f2510c706"},"schema_version":"1.0","source":{"id":"1903.08932","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.08932","created_at":"2026-05-17T23:50:43Z"},{"alias_kind":"arxiv_version","alias_value":"1903.08932v1","created_at":"2026-05-17T23:50:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.08932","created_at":"2026-05-17T23:50:43Z"},{"alias_kind":"pith_short_12","alias_value":"KT4Y7H6RFG34","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"KT4Y7H6RFG34RVKD","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"KT4Y7H6R","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:1a875afca6f621e12ebdaff41c4a4a2ce6fddfdb0949e87737782a100b578de4","target":"graph","created_at":"2026-05-17T23:50:43Z","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 space density of late M dwarfs, subtypes M7-M9.5, is not well determined. We applied the photo-type method to $iz$ photometry from the Sloan Digital Sky Survey and $YJHK$ photometry from the UKIRT Infrared Deep Sky Survey, over an effective area of 3070 $deg^{2}$, to produce a new, bright $J$(Vega) < 17.5, homogeneous sample of 33 665 M7-M9.5 dwarfs. The typical S/N of each source summed over the six bands is > 100. Classifications are provided to the nearest half spectral subtype. Through a comparison with the classifications in the BOSS Ultracool Dwarfs (BUD) spectroscopic sample, the ty","authors_text":"S. Ahmed, S. J. Warren","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-21T11:38:37Z","title":"A homogeneous sample of 34 000 M7-M9.5 dwarfs brighter than $J$=17.5 with accurate spectral types"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.08932","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":"sha256:99d8d0414e0cd37d0928a1d28875add08868f7700a06c4220fb82b36184e81df","target":"record","created_at":"2026-05-17T23:50:43Z","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":"bcff620109dead8a9ebb91bb9edc5fa9ad58067234b1febb457eded836cfc781","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-21T11:38:37Z","title_canon_sha256":"91bb2e21de0a675acc3a46e79dadd86614b994de8b47e46c315d3b4f2510c706"},"schema_version":"1.0","source":{"id":"1903.08932","kind":"arxiv","version":1}},"canonical_sha256":"54f98f9fd129b7c8d5435189e66574cd1aeec714b416329824cc7b891754968f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"54f98f9fd129b7c8d5435189e66574cd1aeec714b416329824cc7b891754968f","first_computed_at":"2026-05-17T23:50:43.535359Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:50:43.535359Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uXpYpCCe/ZW1SfizJviK7h6BzhEPj740i8ajnmZTIItPVH9unavG1/pBU9Rd8t28NZcefdHHvJ+XWiRk3qqUBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:50:43.535706Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.08932","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:99d8d0414e0cd37d0928a1d28875add08868f7700a06c4220fb82b36184e81df","sha256:1a875afca6f621e12ebdaff41c4a4a2ce6fddfdb0949e87737782a100b578de4"],"state_sha256":"2f0f7d70faee92bafcae0dfaad99545851fcf28b5b69fd6acb9bb6ca15fd1b94"}