{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:OP2HFXPZXJ2FBYPHJ37EY57SSG","short_pith_number":"pith:OP2HFXPZ","canonical_record":{"source":{"id":"0811.2484","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-11-15T12:25:14Z","cross_cats_sorted":[],"title_canon_sha256":"424655b03c395bf7530e766b3b59bd6532aa556889e5fc6d2b7e5f4b572d355c","abstract_canon_sha256":"41355f308036d5e4c0c9894fab6d5c045c9cc1e62b4244f2a8e3ed208cebb878"},"schema_version":"1.0"},"canonical_sha256":"73f472ddf9ba7450e1e74efe4c77f2918df8fddd5c5f1a88b5cacaf6d8fd0045","source":{"kind":"arxiv","id":"0811.2484","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0811.2484","created_at":"2026-07-04T17:13:39Z"},{"alias_kind":"arxiv_version","alias_value":"0811.2484v1","created_at":"2026-07-04T17:13:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0811.2484","created_at":"2026-07-04T17:13:39Z"},{"alias_kind":"pith_short_12","alias_value":"OP2HFXPZXJ2F","created_at":"2026-07-04T17:13:39Z"},{"alias_kind":"pith_short_16","alias_value":"OP2HFXPZXJ2FBYPH","created_at":"2026-07-04T17:13:39Z"},{"alias_kind":"pith_short_8","alias_value":"OP2HFXPZ","created_at":"2026-07-04T17:13:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:OP2HFXPZXJ2FBYPHJ37EY57SSG","target":"record","payload":{"canonical_record":{"source":{"id":"0811.2484","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-11-15T12:25:14Z","cross_cats_sorted":[],"title_canon_sha256":"424655b03c395bf7530e766b3b59bd6532aa556889e5fc6d2b7e5f4b572d355c","abstract_canon_sha256":"41355f308036d5e4c0c9894fab6d5c045c9cc1e62b4244f2a8e3ed208cebb878"},"schema_version":"1.0"},"canonical_sha256":"73f472ddf9ba7450e1e74efe4c77f2918df8fddd5c5f1a88b5cacaf6d8fd0045","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:13:39.508766Z","signature_b64":"nf0LbHeDWXJmcXwQPauWs4cZoHNqGjuMDRrBIg2TLXSe8GEj+sSMwmAuOAIE1fAdcJ2LHJs+vOueasDh+Mf2CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"73f472ddf9ba7450e1e74efe4c77f2918df8fddd5c5f1a88b5cacaf6d8fd0045","last_reissued_at":"2026-07-04T17:13:39.508376Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:13:39.508376Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0811.2484","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":"2026-07-04T17:13:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KKsB49hDXIv27kJhf+mRRNO/3vuIRupswiSn78qsiGqAByh91G9VxNuYWYvEN5K1ZpneDrIWI58Xn8UnQf2OBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T03:54:16.620905Z"},"content_sha256":"0e60d8afbec576342e0bc175aa9673a789418dfad688c9d17ec00cfd02f2262f","schema_version":"1.0","event_id":"sha256:0e60d8afbec576342e0bc175aa9673a789418dfad688c9d17ec00cfd02f2262f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:OP2HFXPZXJ2FBYPHJ37EY57SSG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observation and modelling of dusty, low gravity L, and M dwarfs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Adam J. Burgasser, Andreas Seifahrt, Christiane Helling, Dagny L. Looper, Katelyn N. Allers, Kelle L. Cruz, Michael C. Cushing, S\\\"oren Witte, Ulrike Heiter","submitted_at":"2008-11-15T12:25:14Z","abstract_excerpt":"Observational facilities allow now the detection of optical and IR spectra of young M- and L-dwarfs. This enables empirical comparisons with old M- and L- dwarfs, and detailed studies in comparison with synthetic spectra. While classical stellar atmosphere physics seems perfectly appropriate for old M-dwarfs, more physical and chemical processes, cloud formation in particular, needs to be modelled in the substellar regime to allow a detailed spectral interpretation.\n  Not much is known so far about the details of the inset of cloud formation at the spectral transition region between M and L dw"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0811.2484","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0811.2484/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T17:13:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RBwvQOWeDa3/LFJ8thHNAP/3ZAbZWHSCp4W8espgaSKTxTynZBcvDCDzrYcxQ+yL/zMKrC8mXy6t2m0x5KJHAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T03:54:16.621265Z"},"content_sha256":"fc5769b7fdc62a08c134fa0a0cd9c6ace9871028c86b3892a6d20012a1e458bf","schema_version":"1.0","event_id":"sha256:fc5769b7fdc62a08c134fa0a0cd9c6ace9871028c86b3892a6d20012a1e458bf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OP2HFXPZXJ2FBYPHJ37EY57SSG/bundle.json","state_url":"https://pith.science/pith/OP2HFXPZXJ2FBYPHJ37EY57SSG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OP2HFXPZXJ2FBYPHJ37EY57SSG/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":"2026-07-05T03:54:16Z","links":{"resolver":"https://pith.science/pith/OP2HFXPZXJ2FBYPHJ37EY57SSG","bundle":"https://pith.science/pith/OP2HFXPZXJ2FBYPHJ37EY57SSG/bundle.json","state":"https://pith.science/pith/OP2HFXPZXJ2FBYPHJ37EY57SSG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OP2HFXPZXJ2FBYPHJ37EY57SSG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:OP2HFXPZXJ2FBYPHJ37EY57SSG","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":"41355f308036d5e4c0c9894fab6d5c045c9cc1e62b4244f2a8e3ed208cebb878","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-11-15T12:25:14Z","title_canon_sha256":"424655b03c395bf7530e766b3b59bd6532aa556889e5fc6d2b7e5f4b572d355c"},"schema_version":"1.0","source":{"id":"0811.2484","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0811.2484","created_at":"2026-07-04T17:13:39Z"},{"alias_kind":"arxiv_version","alias_value":"0811.2484v1","created_at":"2026-07-04T17:13:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0811.2484","created_at":"2026-07-04T17:13:39Z"},{"alias_kind":"pith_short_12","alias_value":"OP2HFXPZXJ2F","created_at":"2026-07-04T17:13:39Z"},{"alias_kind":"pith_short_16","alias_value":"OP2HFXPZXJ2FBYPH","created_at":"2026-07-04T17:13:39Z"},{"alias_kind":"pith_short_8","alias_value":"OP2HFXPZ","created_at":"2026-07-04T17:13:39Z"}],"graph_snapshots":[{"event_id":"sha256:fc5769b7fdc62a08c134fa0a0cd9c6ace9871028c86b3892a6d20012a1e458bf","target":"graph","created_at":"2026-07-04T17:13:39Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0811.2484/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Observational facilities allow now the detection of optical and IR spectra of young M- and L-dwarfs. This enables empirical comparisons with old M- and L- dwarfs, and detailed studies in comparison with synthetic spectra. While classical stellar atmosphere physics seems perfectly appropriate for old M-dwarfs, more physical and chemical processes, cloud formation in particular, needs to be modelled in the substellar regime to allow a detailed spectral interpretation.\n  Not much is known so far about the details of the inset of cloud formation at the spectral transition region between M and L dw","authors_text":"Adam J. Burgasser, Andreas Seifahrt, Christiane Helling, Dagny L. Looper, Katelyn N. Allers, Kelle L. Cruz, Michael C. Cushing, S\\\"oren Witte, Ulrike Heiter","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-11-15T12:25:14Z","title":"Observation and modelling of dusty, low gravity L, and M dwarfs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0811.2484","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":"sha256:0e60d8afbec576342e0bc175aa9673a789418dfad688c9d17ec00cfd02f2262f","target":"record","created_at":"2026-07-04T17:13:39Z","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":"41355f308036d5e4c0c9894fab6d5c045c9cc1e62b4244f2a8e3ed208cebb878","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-11-15T12:25:14Z","title_canon_sha256":"424655b03c395bf7530e766b3b59bd6532aa556889e5fc6d2b7e5f4b572d355c"},"schema_version":"1.0","source":{"id":"0811.2484","kind":"arxiv","version":1}},"canonical_sha256":"73f472ddf9ba7450e1e74efe4c77f2918df8fddd5c5f1a88b5cacaf6d8fd0045","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"73f472ddf9ba7450e1e74efe4c77f2918df8fddd5c5f1a88b5cacaf6d8fd0045","first_computed_at":"2026-07-04T17:13:39.508376Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:13:39.508376Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nf0LbHeDWXJmcXwQPauWs4cZoHNqGjuMDRrBIg2TLXSe8GEj+sSMwmAuOAIE1fAdcJ2LHJs+vOueasDh+Mf2CQ==","signature_status":"signed_v1","signed_at":"2026-07-04T17:13:39.508766Z","signed_message":"canonical_sha256_bytes"},"source_id":"0811.2484","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0e60d8afbec576342e0bc175aa9673a789418dfad688c9d17ec00cfd02f2262f","sha256:fc5769b7fdc62a08c134fa0a0cd9c6ace9871028c86b3892a6d20012a1e458bf"],"state_sha256":"81202283035afaff5aa929d0d5e84b5c8825a1a5920ddfbdee97cf398b0e856f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Xop47gPTtAYmJMVnL5Gpc4klwmRk9VJsU2atbxfuUeKBpd0/QzS8bjIwWr4/HJ6SMKAa2upFWerubjJPAKraCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T03:54:16.623322Z","bundle_sha256":"540fb6efb6c80a90c78bf23bcfa18d0af21cc6da76dc5eb9d9aea46eededed73"}}