{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:MMTLBEEWWSIHP5SKMSVAVBJR7L","short_pith_number":"pith:MMTLBEEW","canonical_record":{"source":{"id":"0912.3808","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-12-18T21:17:42Z","cross_cats_sorted":[],"title_canon_sha256":"a1f08205eed6c381ccca39d7f9b00480a88ea81604e623c4dd8625b2d9133856","abstract_canon_sha256":"39d172f690c12c0db26e7c7767d5c7ce807e1aa90eae3c63eca1acdeae5ec273"},"schema_version":"1.0"},"canonical_sha256":"6326b09096b49077f64a64aa0a8531fac7f8378d2310b5248a43ecf9f1ec7d65","source":{"kind":"arxiv","id":"0912.3808","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0912.3808","created_at":"2026-05-18T02:33:55Z"},{"alias_kind":"arxiv_version","alias_value":"0912.3808v1","created_at":"2026-05-18T02:33:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.3808","created_at":"2026-05-18T02:33:55Z"},{"alias_kind":"pith_short_12","alias_value":"MMTLBEEWWSIH","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"MMTLBEEWWSIHP5SK","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"MMTLBEEW","created_at":"2026-05-18T12:26:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:MMTLBEEWWSIHP5SKMSVAVBJR7L","target":"record","payload":{"canonical_record":{"source":{"id":"0912.3808","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-12-18T21:17:42Z","cross_cats_sorted":[],"title_canon_sha256":"a1f08205eed6c381ccca39d7f9b00480a88ea81604e623c4dd8625b2d9133856","abstract_canon_sha256":"39d172f690c12c0db26e7c7767d5c7ce807e1aa90eae3c63eca1acdeae5ec273"},"schema_version":"1.0"},"canonical_sha256":"6326b09096b49077f64a64aa0a8531fac7f8378d2310b5248a43ecf9f1ec7d65","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:33:55.911609Z","signature_b64":"z+kczcFlzGTTCQrkovKauIqr/ApHcIJ/WbiIFYAQXm/xbT1PdnWGUypAYm/SYVJY/X42SVUdhE5tjyXno82uCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6326b09096b49077f64a64aa0a8531fac7f8378d2310b5248a43ecf9f1ec7d65","last_reissued_at":"2026-05-18T02:33:55.911193Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:33:55.911193Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0912.3808","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":"2026-05-18T02:33:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OMD+GdApUaPMYKvsvVA4ZG9BrGp9bCVCu3bkgSyPBe8PaKFGURsqLlAa+03kL1EJDzo4i7DIIxmfsvB3ZIUMDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T04:57:29.060005Z"},"content_sha256":"c35020e686d62e5c6338fc80f4096cce82758703b20b0bec7644c2c115118fff","schema_version":"1.0","event_id":"sha256:c35020e686d62e5c6338fc80f4096cce82758703b20b0bec7644c2c115118fff"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:MMTLBEEWWSIHP5SKMSVAVBJR7L","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"SpeX Spectroscopy of Unresolved Very Low-Mass Binaries. I. Identification of Seventeen Candidate Binaries Straddling the L Dwarf/T Dwarf Transition","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Adam J. Burgasser (UCSD), Christopher R. Gelino (Caltech/IPAC), Dagny L. Looper (U. Hawaii), I. Neill Reid (STScI), Jacqueline K. Faherty (SUNY Stony Brook/AMNH), J. Davy Kirkpatrick (Caltech/IPAC), Kelle L. Cruz (Hunter College), Michael Cushing (Caltech/JPL)","submitted_at":"2009-12-18T21:17:42Z","abstract_excerpt":"We report the identification of 17 candidate brown dwarf binaries whose components straddle the L dwarf/T dwarf transition. These sources were culled from a large near-infrared spectral sample of L and T dwarfs observed with the Infrared Telescope Facility SpeX spectrograph. Candidates were selected on the basis of spectral ratios which segregate known (resolved) L dwarf/T dwarf pairs from presumably single sources. Composite templates, constructed by combining 13581 pairs of absolute flux-calibrated spectra, are shown to provide statistically superior fits to the spectra of our seventeen cand"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.3808","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":"2026-05-18T02:33:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4t1kLDyrYpIk44ft8/HSmke4D11K3mhkgHm7G9VBOQ/MKKzjpUCjKl64seUnRYl5yrjO+WIo/c2jvnXBjs8gDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T04:57:29.060724Z"},"content_sha256":"032c342697973578628323e98ffd3ddfc461e1eb451f2084fa6bc47e90974490","schema_version":"1.0","event_id":"sha256:032c342697973578628323e98ffd3ddfc461e1eb451f2084fa6bc47e90974490"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MMTLBEEWWSIHP5SKMSVAVBJR7L/bundle.json","state_url":"https://pith.science/pith/MMTLBEEWWSIHP5SKMSVAVBJR7L/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MMTLBEEWWSIHP5SKMSVAVBJR7L/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":"2026-06-07T04:57:29Z","links":{"resolver":"https://pith.science/pith/MMTLBEEWWSIHP5SKMSVAVBJR7L","bundle":"https://pith.science/pith/MMTLBEEWWSIHP5SKMSVAVBJR7L/bundle.json","state":"https://pith.science/pith/MMTLBEEWWSIHP5SKMSVAVBJR7L/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MMTLBEEWWSIHP5SKMSVAVBJR7L/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:MMTLBEEWWSIHP5SKMSVAVBJR7L","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":"39d172f690c12c0db26e7c7767d5c7ce807e1aa90eae3c63eca1acdeae5ec273","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-12-18T21:17:42Z","title_canon_sha256":"a1f08205eed6c381ccca39d7f9b00480a88ea81604e623c4dd8625b2d9133856"},"schema_version":"1.0","source":{"id":"0912.3808","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0912.3808","created_at":"2026-05-18T02:33:55Z"},{"alias_kind":"arxiv_version","alias_value":"0912.3808v1","created_at":"2026-05-18T02:33:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.3808","created_at":"2026-05-18T02:33:55Z"},{"alias_kind":"pith_short_12","alias_value":"MMTLBEEWWSIH","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"MMTLBEEWWSIHP5SK","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"MMTLBEEW","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:032c342697973578628323e98ffd3ddfc461e1eb451f2084fa6bc47e90974490","target":"graph","created_at":"2026-05-18T02:33:55Z","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 report the identification of 17 candidate brown dwarf binaries whose components straddle the L dwarf/T dwarf transition. These sources were culled from a large near-infrared spectral sample of L and T dwarfs observed with the Infrared Telescope Facility SpeX spectrograph. Candidates were selected on the basis of spectral ratios which segregate known (resolved) L dwarf/T dwarf pairs from presumably single sources. Composite templates, constructed by combining 13581 pairs of absolute flux-calibrated spectra, are shown to provide statistically superior fits to the spectra of our seventeen cand","authors_text":"Adam J. Burgasser (UCSD), Christopher R. Gelino (Caltech/IPAC), Dagny L. Looper (U. Hawaii), I. Neill Reid (STScI), Jacqueline K. Faherty (SUNY Stony Brook/AMNH), J. Davy Kirkpatrick (Caltech/IPAC), Kelle L. Cruz (Hunter College), Michael Cushing (Caltech/JPL)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-12-18T21:17:42Z","title":"SpeX Spectroscopy of Unresolved Very Low-Mass Binaries. I. Identification of Seventeen Candidate Binaries Straddling the L Dwarf/T Dwarf Transition"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.3808","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:c35020e686d62e5c6338fc80f4096cce82758703b20b0bec7644c2c115118fff","target":"record","created_at":"2026-05-18T02:33:55Z","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":"39d172f690c12c0db26e7c7767d5c7ce807e1aa90eae3c63eca1acdeae5ec273","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-12-18T21:17:42Z","title_canon_sha256":"a1f08205eed6c381ccca39d7f9b00480a88ea81604e623c4dd8625b2d9133856"},"schema_version":"1.0","source":{"id":"0912.3808","kind":"arxiv","version":1}},"canonical_sha256":"6326b09096b49077f64a64aa0a8531fac7f8378d2310b5248a43ecf9f1ec7d65","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6326b09096b49077f64a64aa0a8531fac7f8378d2310b5248a43ecf9f1ec7d65","first_computed_at":"2026-05-18T02:33:55.911193Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:33:55.911193Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"z+kczcFlzGTTCQrkovKauIqr/ApHcIJ/WbiIFYAQXm/xbT1PdnWGUypAYm/SYVJY/X42SVUdhE5tjyXno82uCg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:33:55.911609Z","signed_message":"canonical_sha256_bytes"},"source_id":"0912.3808","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c35020e686d62e5c6338fc80f4096cce82758703b20b0bec7644c2c115118fff","sha256:032c342697973578628323e98ffd3ddfc461e1eb451f2084fa6bc47e90974490"],"state_sha256":"748c8cf2bc3f9dc6714395bd2158fa969ec29fc88ccd24a49c0cd527e86f03e2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FWEAy1P/i8YM/7nxtaPgT8FwMipbsg+G69LBzAwjF2Ub71XUyo4W/VbPkQrGLT7jQ0v23NzhHyfyTVS0yW0JBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T04:57:29.064051Z","bundle_sha256":"a9cf9783128354c56e79d833abf4d34585e3081687408c903a1a0e9a122959c6"}}