{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:TUQI4XBJUJKQEOJFOGHPGIEEDZ","short_pith_number":"pith:TUQI4XBJ","canonical_record":{"source":{"id":"1308.5235","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-08-23T20:02:55Z","cross_cats_sorted":[],"title_canon_sha256":"3da3f83941466213a538d69c42e59a08937a643bcbb987b7815c678ffc3f1d5a","abstract_canon_sha256":"8de0dbb6e62dcb857759a471529a19df515ce2d500870b07c797bfd4cb4bd883"},"schema_version":"1.0"},"canonical_sha256":"9d208e5c29a255023925718ef320841e5b0249c70bb63dfbe813c67044d0d244","source":{"kind":"arxiv","id":"1308.5235","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.5235","created_at":"2026-05-18T03:15:07Z"},{"alias_kind":"arxiv_version","alias_value":"1308.5235v1","created_at":"2026-05-18T03:15:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.5235","created_at":"2026-05-18T03:15:07Z"},{"alias_kind":"pith_short_12","alias_value":"TUQI4XBJUJKQ","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_16","alias_value":"TUQI4XBJUJKQEOJF","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_8","alias_value":"TUQI4XBJ","created_at":"2026-05-18T12:28:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:TUQI4XBJUJKQEOJFOGHPGIEEDZ","target":"record","payload":{"canonical_record":{"source":{"id":"1308.5235","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-08-23T20:02:55Z","cross_cats_sorted":[],"title_canon_sha256":"3da3f83941466213a538d69c42e59a08937a643bcbb987b7815c678ffc3f1d5a","abstract_canon_sha256":"8de0dbb6e62dcb857759a471529a19df515ce2d500870b07c797bfd4cb4bd883"},"schema_version":"1.0"},"canonical_sha256":"9d208e5c29a255023925718ef320841e5b0249c70bb63dfbe813c67044d0d244","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:15:07.364199Z","signature_b64":"Ln1ya/mfNT4bmirZdIHbIVtiv9XSXRHpXUxlFA0d3/3rlr31+gqO06xnW6vgtQhAH8/k6HnPqlOgK6QAyx5KBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9d208e5c29a255023925718ef320841e5b0249c70bb63dfbe813c67044d0d244","last_reissued_at":"2026-05-18T03:15:07.363238Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:15:07.363238Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1308.5235","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":"2026-05-18T03:15:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X7e9lgY+scG7pADeLNLdXpYww/0EBE+pjwEYuG0lQ71ijeB7ViSbIDUlvkbs7GNzg6kBUCQaKa0TCwPcvVa1CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T09:01:56.799773Z"},"content_sha256":"fafddb7a278f5aea4f672541d6e2cb27caa9037b6246d5c5cad5dcae883736cd","schema_version":"1.0","event_id":"sha256:fafddb7a278f5aea4f672541d6e2cb27caa9037b6246d5c5cad5dcae883736cd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:TUQI4XBJUJKQEOJFOGHPGIEEDZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fundamental properties of T dwarfs from model fits to FIRE spectra","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. J. Burgasser, C. P. Nicholls, C. V. Morley","submitted_at":"2013-08-23T20:02:55Z","abstract_excerpt":"We fit a sample of 49 R=6000 NIR (0.9 - 2.5 micron) T dwarf spectra obtained with Magellan's FIRE spectrograph with two different atmospheric model sets to compare the derived physical parameters such as Teff, log g, cloud opacity, and rotational velocity between the models, as well as their reliability. Many of our T dwarfs have distance measurements, which allows us to calculate their radii during the fitting, which can be compared to evolutionary models to determine age, mass and potentially the presence of unseen companions. We present our spectral sample and model fits, and comment on the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.5235","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":"2026-05-18T03:15:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"byEsUlQH14C2eoAn5VaplPQd1/emtbw8lNDxwx9NzVOPIhnDFpVdmlIsi2CyVzBs731xj9jEzG6mXkd2zuRNCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T09:01:56.800115Z"},"content_sha256":"6b130b30e393f7b94480161250290aed8d15b550fa8fe867d0124c1429b64e8a","schema_version":"1.0","event_id":"sha256:6b130b30e393f7b94480161250290aed8d15b550fa8fe867d0124c1429b64e8a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TUQI4XBJUJKQEOJFOGHPGIEEDZ/bundle.json","state_url":"https://pith.science/pith/TUQI4XBJUJKQEOJFOGHPGIEEDZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TUQI4XBJUJKQEOJFOGHPGIEEDZ/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":"2026-06-04T09:01:56Z","links":{"resolver":"https://pith.science/pith/TUQI4XBJUJKQEOJFOGHPGIEEDZ","bundle":"https://pith.science/pith/TUQI4XBJUJKQEOJFOGHPGIEEDZ/bundle.json","state":"https://pith.science/pith/TUQI4XBJUJKQEOJFOGHPGIEEDZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TUQI4XBJUJKQEOJFOGHPGIEEDZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:TUQI4XBJUJKQEOJFOGHPGIEEDZ","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":"8de0dbb6e62dcb857759a471529a19df515ce2d500870b07c797bfd4cb4bd883","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-08-23T20:02:55Z","title_canon_sha256":"3da3f83941466213a538d69c42e59a08937a643bcbb987b7815c678ffc3f1d5a"},"schema_version":"1.0","source":{"id":"1308.5235","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.5235","created_at":"2026-05-18T03:15:07Z"},{"alias_kind":"arxiv_version","alias_value":"1308.5235v1","created_at":"2026-05-18T03:15:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.5235","created_at":"2026-05-18T03:15:07Z"},{"alias_kind":"pith_short_12","alias_value":"TUQI4XBJUJKQ","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_16","alias_value":"TUQI4XBJUJKQEOJF","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_8","alias_value":"TUQI4XBJ","created_at":"2026-05-18T12:28:02Z"}],"graph_snapshots":[{"event_id":"sha256:6b130b30e393f7b94480161250290aed8d15b550fa8fe867d0124c1429b64e8a","target":"graph","created_at":"2026-05-18T03:15:07Z","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 fit a sample of 49 R=6000 NIR (0.9 - 2.5 micron) T dwarf spectra obtained with Magellan's FIRE spectrograph with two different atmospheric model sets to compare the derived physical parameters such as Teff, log g, cloud opacity, and rotational velocity between the models, as well as their reliability. Many of our T dwarfs have distance measurements, which allows us to calculate their radii during the fitting, which can be compared to evolutionary models to determine age, mass and potentially the presence of unseen companions. We present our spectral sample and model fits, and comment on the","authors_text":"A. J. Burgasser, C. P. Nicholls, C. V. Morley","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-08-23T20:02:55Z","title":"Fundamental properties of T dwarfs from model fits to FIRE spectra"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.5235","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:fafddb7a278f5aea4f672541d6e2cb27caa9037b6246d5c5cad5dcae883736cd","target":"record","created_at":"2026-05-18T03:15:07Z","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":"8de0dbb6e62dcb857759a471529a19df515ce2d500870b07c797bfd4cb4bd883","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-08-23T20:02:55Z","title_canon_sha256":"3da3f83941466213a538d69c42e59a08937a643bcbb987b7815c678ffc3f1d5a"},"schema_version":"1.0","source":{"id":"1308.5235","kind":"arxiv","version":1}},"canonical_sha256":"9d208e5c29a255023925718ef320841e5b0249c70bb63dfbe813c67044d0d244","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9d208e5c29a255023925718ef320841e5b0249c70bb63dfbe813c67044d0d244","first_computed_at":"2026-05-18T03:15:07.363238Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:15:07.363238Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ln1ya/mfNT4bmirZdIHbIVtiv9XSXRHpXUxlFA0d3/3rlr31+gqO06xnW6vgtQhAH8/k6HnPqlOgK6QAyx5KBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:15:07.364199Z","signed_message":"canonical_sha256_bytes"},"source_id":"1308.5235","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fafddb7a278f5aea4f672541d6e2cb27caa9037b6246d5c5cad5dcae883736cd","sha256:6b130b30e393f7b94480161250290aed8d15b550fa8fe867d0124c1429b64e8a"],"state_sha256":"eb71ed3cae9cb3ccf581d6f765f4c7d7143627c82287e0678a86d00b3cde4dba"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"H+c6q7uVn/Jwa6uAEQ1+aps9SC3EB3zrqGMUoY0VHkAv0IL23BscodWkQkl+4vCo9X6oHAX2iWYSnqu3t1eHAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T09:01:56.802085Z","bundle_sha256":"07e8580531e20d2314f1abd1571f0037396b2e35c1b9181f6749d279c42c7266"}}