{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:VWJUJIJIASMJ5JKYDB3ER6DSZW","short_pith_number":"pith:VWJUJIJI","canonical_record":{"source":{"id":"1104.5081","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-04-27T07:45:49Z","cross_cats_sorted":[],"title_canon_sha256":"2f51f1b4336521b43b14ef88419b0997f789d6b742eed9114e637c5c541c87a4","abstract_canon_sha256":"6127c5dac5d3dc70d0cb3185edadd829ecc52cb8aa2339f44f0e648c1484ed03"},"schema_version":"1.0"},"canonical_sha256":"ad9344a12804989ea558187648f872cda8d01d417e9a502bd8c883e8119c392f","source":{"kind":"arxiv","id":"1104.5081","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1104.5081","created_at":"2026-05-18T02:02:14Z"},{"alias_kind":"arxiv_version","alias_value":"1104.5081v1","created_at":"2026-05-18T02:02:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.5081","created_at":"2026-05-18T02:02:14Z"},{"alias_kind":"pith_short_12","alias_value":"VWJUJIJIASMJ","created_at":"2026-05-18T12:26:44Z"},{"alias_kind":"pith_short_16","alias_value":"VWJUJIJIASMJ5JKY","created_at":"2026-05-18T12:26:44Z"},{"alias_kind":"pith_short_8","alias_value":"VWJUJIJI","created_at":"2026-05-18T12:26:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:VWJUJIJIASMJ5JKYDB3ER6DSZW","target":"record","payload":{"canonical_record":{"source":{"id":"1104.5081","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-04-27T07:45:49Z","cross_cats_sorted":[],"title_canon_sha256":"2f51f1b4336521b43b14ef88419b0997f789d6b742eed9114e637c5c541c87a4","abstract_canon_sha256":"6127c5dac5d3dc70d0cb3185edadd829ecc52cb8aa2339f44f0e648c1484ed03"},"schema_version":"1.0"},"canonical_sha256":"ad9344a12804989ea558187648f872cda8d01d417e9a502bd8c883e8119c392f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:02:14.356546Z","signature_b64":"V2GjjO3t5FCbzg/JwlsTL4MvV9A4Jy2F/V5XbiQLU8XDTb7KIUw4sQ3OSWE5cvgZVUCPI4qI/jdW03SS9WYZDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ad9344a12804989ea558187648f872cda8d01d417e9a502bd8c883e8119c392f","last_reissued_at":"2026-05-18T02:02:14.355907Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:02:14.355907Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1104.5081","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":"2026-05-18T02:02:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OB08+6Qw5wXziWY/+/BMeh686+z2vnNEuJq83e6C/GSxAPnxLl3vqFNbElMFC5OpcaVQiFtMmXrk4I6MJgdYBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T15:51:14.134097Z"},"content_sha256":"e751018af0da924b52ce7aca8a3cf2dba47bc646940bdde3cc8408a81dba851a","schema_version":"1.0","event_id":"sha256:e751018af0da924b52ce7aca8a3cf2dba47bc646940bdde3cc8408a81dba851a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:VWJUJIJIASMJ5JKYDB3ER6DSZW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the minimum temperature of the quiet solar chromosphere","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Boris V. Gudiksen, Jorrit Leenaarts, Mats Carlsson, Viggo Hansteen","submitted_at":"2011-04-27T07:45:49Z","abstract_excerpt":"aims: We aim to provide an estimate of the minimum temperature of the quiet solar chromosphere. methods: We perform a 2D radiation-MHD simulation spanning the upper convection zone to the lower corona. The simulation includes non-LTE radiative transfer and {an equation-of-state that includes non-equilibrium ionization of hydrogen and non-equilibrium H_2 molecule formation}. We analyze the reliability of the various assumptions made in our model in order to assess the realism of the simulation. results: Our simulation contains pockets of cool gas with down to 1660 K from 1 Mm up to 3.2 Mm heigh"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.5081","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":"2026-05-18T02:02:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0m7iD/jinShcVCRIV8XhYJXK03RpNe8V8XyEPX7aWgcKB8VgEa5iVLfw+vB9mSw8iK073+jVXIH/ZvIaY81QAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T15:51:14.134802Z"},"content_sha256":"92d3ba5b9a3ee1a9aa0eac6140bc7ace0e1ebabe0a526dc13310cbea47ac3f91","schema_version":"1.0","event_id":"sha256:92d3ba5b9a3ee1a9aa0eac6140bc7ace0e1ebabe0a526dc13310cbea47ac3f91"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VWJUJIJIASMJ5JKYDB3ER6DSZW/bundle.json","state_url":"https://pith.science/pith/VWJUJIJIASMJ5JKYDB3ER6DSZW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VWJUJIJIASMJ5JKYDB3ER6DSZW/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":"2026-05-29T15:51:14Z","links":{"resolver":"https://pith.science/pith/VWJUJIJIASMJ5JKYDB3ER6DSZW","bundle":"https://pith.science/pith/VWJUJIJIASMJ5JKYDB3ER6DSZW/bundle.json","state":"https://pith.science/pith/VWJUJIJIASMJ5JKYDB3ER6DSZW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VWJUJIJIASMJ5JKYDB3ER6DSZW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:VWJUJIJIASMJ5JKYDB3ER6DSZW","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":"6127c5dac5d3dc70d0cb3185edadd829ecc52cb8aa2339f44f0e648c1484ed03","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-04-27T07:45:49Z","title_canon_sha256":"2f51f1b4336521b43b14ef88419b0997f789d6b742eed9114e637c5c541c87a4"},"schema_version":"1.0","source":{"id":"1104.5081","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1104.5081","created_at":"2026-05-18T02:02:14Z"},{"alias_kind":"arxiv_version","alias_value":"1104.5081v1","created_at":"2026-05-18T02:02:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.5081","created_at":"2026-05-18T02:02:14Z"},{"alias_kind":"pith_short_12","alias_value":"VWJUJIJIASMJ","created_at":"2026-05-18T12:26:44Z"},{"alias_kind":"pith_short_16","alias_value":"VWJUJIJIASMJ5JKY","created_at":"2026-05-18T12:26:44Z"},{"alias_kind":"pith_short_8","alias_value":"VWJUJIJI","created_at":"2026-05-18T12:26:44Z"}],"graph_snapshots":[{"event_id":"sha256:92d3ba5b9a3ee1a9aa0eac6140bc7ace0e1ebabe0a526dc13310cbea47ac3f91","target":"graph","created_at":"2026-05-18T02:02:14Z","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":"aims: We aim to provide an estimate of the minimum temperature of the quiet solar chromosphere. methods: We perform a 2D radiation-MHD simulation spanning the upper convection zone to the lower corona. The simulation includes non-LTE radiative transfer and {an equation-of-state that includes non-equilibrium ionization of hydrogen and non-equilibrium H_2 molecule formation}. We analyze the reliability of the various assumptions made in our model in order to assess the realism of the simulation. results: Our simulation contains pockets of cool gas with down to 1660 K from 1 Mm up to 3.2 Mm heigh","authors_text":"Boris V. Gudiksen, Jorrit Leenaarts, Mats Carlsson, Viggo Hansteen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-04-27T07:45:49Z","title":"On the minimum temperature of the quiet solar chromosphere"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.5081","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:e751018af0da924b52ce7aca8a3cf2dba47bc646940bdde3cc8408a81dba851a","target":"record","created_at":"2026-05-18T02:02:14Z","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":"6127c5dac5d3dc70d0cb3185edadd829ecc52cb8aa2339f44f0e648c1484ed03","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-04-27T07:45:49Z","title_canon_sha256":"2f51f1b4336521b43b14ef88419b0997f789d6b742eed9114e637c5c541c87a4"},"schema_version":"1.0","source":{"id":"1104.5081","kind":"arxiv","version":1}},"canonical_sha256":"ad9344a12804989ea558187648f872cda8d01d417e9a502bd8c883e8119c392f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ad9344a12804989ea558187648f872cda8d01d417e9a502bd8c883e8119c392f","first_computed_at":"2026-05-18T02:02:14.355907Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:02:14.355907Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"V2GjjO3t5FCbzg/JwlsTL4MvV9A4Jy2F/V5XbiQLU8XDTb7KIUw4sQ3OSWE5cvgZVUCPI4qI/jdW03SS9WYZDw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:02:14.356546Z","signed_message":"canonical_sha256_bytes"},"source_id":"1104.5081","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e751018af0da924b52ce7aca8a3cf2dba47bc646940bdde3cc8408a81dba851a","sha256:92d3ba5b9a3ee1a9aa0eac6140bc7ace0e1ebabe0a526dc13310cbea47ac3f91"],"state_sha256":"99561773bb9650fe5c347d95862e833230705a1bdb48cc2502568e75f6211a36"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2bUdhS59fLeLOZJfdUP9nfQpgpmxbewrUa00WfIBgTFH6f2JN5gNovWs48AuY/btjYDKVmY77t5MVQF41+oBBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T15:51:14.138620Z","bundle_sha256":"0d16f08e19806a0c99f19d482b7e9cd4c0663b45816955fa6d61855905e3b919"}}