{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:HE4UMTQJWPBGNFQ2NTAGUAMAC2","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":"6d0174224d7141682ab04284d45269875ca32431ca5af83d10bc3261bcfe026e","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-01-22T21:00:25Z","title_canon_sha256":"574a520b1345e8c7148b046d9ea52a524804d3c44f803aa8eca468735f37253b"},"schema_version":"1.0","source":{"id":"1401.5801","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1401.5801","created_at":"2026-05-18T01:45:17Z"},{"alias_kind":"arxiv_version","alias_value":"1401.5801v2","created_at":"2026-05-18T01:45:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.5801","created_at":"2026-05-18T01:45:17Z"},{"alias_kind":"pith_short_12","alias_value":"HE4UMTQJWPBG","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_16","alias_value":"HE4UMTQJWPBGNFQ2","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_8","alias_value":"HE4UMTQJ","created_at":"2026-05-18T12:28:30Z"}],"graph_snapshots":[{"event_id":"sha256:474032ca314184a33ec6573118aa5402b4d4cfc92c776fe99d7e89db55e74b05","target":"graph","created_at":"2026-05-18T01:45:17Z","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 propose that the 2.7 micron H_2O, 3.3 micron CH_4 and 4.6 micron CO absorption bands can be good tracers of chromospheric activity in brown dwarfs. In our previous study, we found that there are difficulties in explaining entire spectra between 1.0 and 5.0 microns with the Unified Cloudy Model (UCM), a brown dwarf atmosphere model. Based on simple radiative equilibrium, temperature in a model atmosphere usually decreases monotonically with height. However, if a brown dwarf has a chromosphere, as inferred by some observations, the temperature in the upper atmosphere is higher. We construct a","authors_text":"Issei Yamamura, Satoko Sorahana, Takeru K. Suzuki","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-01-22T21:00:25Z","title":"A Signature of Chromospheric Activity in Brown Dwarfs Revealed by 2.5-5.0 Micron AKARI Spectra"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.5801","kind":"arxiv","version":2},"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":"sha256:4faf2be01d485569ef11be5bd50565d009b01492db3dd8bf51401182632995f9","target":"record","created_at":"2026-05-18T01:45:17Z","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":"6d0174224d7141682ab04284d45269875ca32431ca5af83d10bc3261bcfe026e","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-01-22T21:00:25Z","title_canon_sha256":"574a520b1345e8c7148b046d9ea52a524804d3c44f803aa8eca468735f37253b"},"schema_version":"1.0","source":{"id":"1401.5801","kind":"arxiv","version":2}},"canonical_sha256":"3939464e09b3c266961a6cc06a018016a49c63080fbecd1cd21ee06a78beb346","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3939464e09b3c266961a6cc06a018016a49c63080fbecd1cd21ee06a78beb346","first_computed_at":"2026-05-18T01:45:17.773181Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:45:17.773181Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0xqL4/uNTBfTXLemh2LyiNLcrpAhu5X/lqesgqScv0cPkpJzKLSNoV6fzBO+WyrOtRafLK9l4TkxdOF4jt7VAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:45:17.773644Z","signed_message":"canonical_sha256_bytes"},"source_id":"1401.5801","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4faf2be01d485569ef11be5bd50565d009b01492db3dd8bf51401182632995f9","sha256:474032ca314184a33ec6573118aa5402b4d4cfc92c776fe99d7e89db55e74b05"],"state_sha256":"31510c1532ad05fad0b10c2d2f8332022a50ff4783a61448cf5755a4d58a4ad8"}