{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:GBWOTFBJCJLV6NEV7JHCKWNK6D","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":"e6e23e98856c4e634ac2160eba79054612e008c6e34f10776fbded4585954c29","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-08-15T01:37:09Z","title_canon_sha256":"28046a05c391a19a947ceaafa91629c301372f9e38b3f0121538acd6cb5e72ae"},"schema_version":"1.0","source":{"id":"astro-ph/0108249","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0108249","created_at":"2026-05-18T01:09:10Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0108249v1","created_at":"2026-05-18T01:09:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0108249","created_at":"2026-05-18T01:09:10Z"},{"alias_kind":"pith_short_12","alias_value":"GBWOTFBJCJLV","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"GBWOTFBJCJLV6NEV","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"GBWOTFBJ","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:9161c53acf37a3dc5f54115a5503ce4295fd4ae650af34fcd781137bb365a75f","target":"graph","created_at":"2026-05-18T01:09:10Z","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 have obtained low resolution optical spectra of 15 isolated planetary mass objects (IPMOs) in the sigma Orionis cluster, and derived spectral types by comparison with nearby M and L dwarfs. The spectral types are in the range late M - mid L, in agreement with our expectations based on colors and magnitudes for bona fide members. Therefore, most of these objects have masses below the deuterium burning limit. About 2/3 show H(alpha) in emission at our spectral resolution. From our spectroscopic and photometric data, we infer that three IPMOs in this sample may be binaries with components of s","authors_text":"2), 5), C.A.L. Bailer-Jones (2). ((1) Universidad Aut\\'onoma de Madrid, CSIC, D. Barrado-y-Navascu\\'es (1, E.L. Mart\\'in (6), Hawaii, Heidelberg. Germany (3) California Institute of Technology, Madrid, M.R. Zapatero-Osorio (3), Pasadena, R. Mundt (2), R. Rebolo (4, Spain. (2) Max-Planck-Institut f\\\"ur Astronomie, Spain (5) Consejo Superior de Investigaciones Cient\\'ificas, Spain (6) Institute of Astronomy. University of Hawaii, Tenerife, USA), USA (4) Instituto de Astrof\\'isica de Canarias, V.J.S. B\\'ejar (4)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2001-08-15T01:37:09Z","title":"Optical spectroscopy of isolated planetary mass objects in the sigma Orionis cluster"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0108249","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:c0b393680f983f2fd50dd7132c8a063cf1a009cae00a470a4dec804a9f7441c9","target":"record","created_at":"2026-05-18T01:09:10Z","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":"e6e23e98856c4e634ac2160eba79054612e008c6e34f10776fbded4585954c29","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-08-15T01:37:09Z","title_canon_sha256":"28046a05c391a19a947ceaafa91629c301372f9e38b3f0121538acd6cb5e72ae"},"schema_version":"1.0","source":{"id":"astro-ph/0108249","kind":"arxiv","version":1}},"canonical_sha256":"306ce9942912575f3495fa4e2559aaf0c94e7b3ba7b0a3cd4425ec7dcdd6b9c1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"306ce9942912575f3495fa4e2559aaf0c94e7b3ba7b0a3cd4425ec7dcdd6b9c1","first_computed_at":"2026-05-18T01:09:10.875239Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:09:10.875239Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"a/vOE+/1EVJNUrR+j6IRMDKpErbVHlz7yp5KomESV6VfGhfhWq5pc04DMRKADPhtF6U/Evxygu/LTGa/IettCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:09:10.875892Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0108249","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c0b393680f983f2fd50dd7132c8a063cf1a009cae00a470a4dec804a9f7441c9","sha256:9161c53acf37a3dc5f54115a5503ce4295fd4ae650af34fcd781137bb365a75f"],"state_sha256":"ea81c66363f4d0b5aa861f55df83231621f5473d59b8872afe4e951af278b64f"}