{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:62MB5P5YRK3Q5OLSICOPL3KCPE","short_pith_number":"pith:62MB5P5Y","canonical_record":{"source":{"id":"0802.3914","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-02-26T21:32:06Z","cross_cats_sorted":[],"title_canon_sha256":"6f2d0f5e0b51461016fd9352334e9f94de6ed642d69722aca79116cd911cf269","abstract_canon_sha256":"b7d01245c158ccec1582c29682e980671172e8278b4c03cd9d299be0be32cc3a"},"schema_version":"1.0"},"canonical_sha256":"f6981ebfb88ab70eb972409cf5ed42790ca3a8b396d1944e49768a7471a0dab1","source":{"kind":"arxiv","id":"0802.3914","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0802.3914","created_at":"2026-07-04T17:09:35Z"},{"alias_kind":"arxiv_version","alias_value":"0802.3914v1","created_at":"2026-07-04T17:09:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0802.3914","created_at":"2026-07-04T17:09:35Z"},{"alias_kind":"pith_short_12","alias_value":"62MB5P5YRK3Q","created_at":"2026-07-04T17:09:35Z"},{"alias_kind":"pith_short_16","alias_value":"62MB5P5YRK3Q5OLS","created_at":"2026-07-04T17:09:35Z"},{"alias_kind":"pith_short_8","alias_value":"62MB5P5Y","created_at":"2026-07-04T17:09:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:62MB5P5YRK3Q5OLSICOPL3KCPE","target":"record","payload":{"canonical_record":{"source":{"id":"0802.3914","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-02-26T21:32:06Z","cross_cats_sorted":[],"title_canon_sha256":"6f2d0f5e0b51461016fd9352334e9f94de6ed642d69722aca79116cd911cf269","abstract_canon_sha256":"b7d01245c158ccec1582c29682e980671172e8278b4c03cd9d299be0be32cc3a"},"schema_version":"1.0"},"canonical_sha256":"f6981ebfb88ab70eb972409cf5ed42790ca3a8b396d1944e49768a7471a0dab1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:09:35.466018Z","signature_b64":"QN6L5GQHrC/nA122Rts1qbi5cHbvNT4xI4yaXdNyd7cVbjCmX3h3sMoRpbnVJlCOAyjhgct6+M/2x3TNjSdmCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f6981ebfb88ab70eb972409cf5ed42790ca3a8b396d1944e49768a7471a0dab1","last_reissued_at":"2026-07-04T17:09:35.465667Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:09:35.465667Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0802.3914","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":"2026-07-04T17:09:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uvzHfhUwL3VQydv3fK6KzngYtOYW/o/L7C2jkFFJgsMU+A818whZ/F04bjq1ZyztwmNVPaGu75woRlL5ab/rCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T09:46:40.740793Z"},"content_sha256":"949d68b2413f6962f507e2ab6bab3d911e71196dfdd4f1bb1b8e0d4e34eb586b","schema_version":"1.0","event_id":"sha256:949d68b2413f6962f507e2ab6bab3d911e71196dfdd4f1bb1b8e0d4e34eb586b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:62MB5P5YRK3Q5OLSICOPL3KCPE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Bimodality in Damped Lyman alpha Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Arthur M. Wolfe, Jason X. Prochaska, Marc Rafelski, Regina A. Jorgenson","submitted_at":"2008-02-26T21:32:06Z","abstract_excerpt":"We report evidence for a bimodality in damped Ly systems (DLAs). Using [C II] 158 mu cooling rates, lc, we find a distribution with peaks at lc=10^-27.4 and 10^-26.6 ergs s^-1 H^-1 separated by a trough at lc^crit ~= lc < 10^-27.0 ergs s^-1 H^-1. We divide the sample into low cool DLAs with lc < lc^crit and high cool DLAs with lc > lc^crit and find the Kolmogorv-Smirnov probabilities that velocity width, metallicity, dust-to-gas ratio, and Si II equivalent width in the two subsamples are drawn from the same parent population are small. All these quantities are significantly larger in the high "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0802.3914","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/0802.3914/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":"2026-07-04T17:09:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"klfROqlfz9V37uijNh5t04tzgSHHJCoH1kHEYAOSVBVI4GVhS1HynVS7ovjJPdKBsrlWVoR/dAWWopD9HOkSBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T09:46:40.741342Z"},"content_sha256":"f7025fb7dec2c0a6270c292319a7cce3cdec351fe5162a1acab11ba8c9d4bdeb","schema_version":"1.0","event_id":"sha256:f7025fb7dec2c0a6270c292319a7cce3cdec351fe5162a1acab11ba8c9d4bdeb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/62MB5P5YRK3Q5OLSICOPL3KCPE/bundle.json","state_url":"https://pith.science/pith/62MB5P5YRK3Q5OLSICOPL3KCPE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/62MB5P5YRK3Q5OLSICOPL3KCPE/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":"2026-08-07T09:46:40Z","links":{"resolver":"https://pith.science/pith/62MB5P5YRK3Q5OLSICOPL3KCPE","bundle":"https://pith.science/pith/62MB5P5YRK3Q5OLSICOPL3KCPE/bundle.json","state":"https://pith.science/pith/62MB5P5YRK3Q5OLSICOPL3KCPE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/62MB5P5YRK3Q5OLSICOPL3KCPE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:62MB5P5YRK3Q5OLSICOPL3KCPE","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":"b7d01245c158ccec1582c29682e980671172e8278b4c03cd9d299be0be32cc3a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-02-26T21:32:06Z","title_canon_sha256":"6f2d0f5e0b51461016fd9352334e9f94de6ed642d69722aca79116cd911cf269"},"schema_version":"1.0","source":{"id":"0802.3914","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0802.3914","created_at":"2026-07-04T17:09:35Z"},{"alias_kind":"arxiv_version","alias_value":"0802.3914v1","created_at":"2026-07-04T17:09:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0802.3914","created_at":"2026-07-04T17:09:35Z"},{"alias_kind":"pith_short_12","alias_value":"62MB5P5YRK3Q","created_at":"2026-07-04T17:09:35Z"},{"alias_kind":"pith_short_16","alias_value":"62MB5P5YRK3Q5OLS","created_at":"2026-07-04T17:09:35Z"},{"alias_kind":"pith_short_8","alias_value":"62MB5P5Y","created_at":"2026-07-04T17:09:35Z"}],"graph_snapshots":[{"event_id":"sha256:f7025fb7dec2c0a6270c292319a7cce3cdec351fe5162a1acab11ba8c9d4bdeb","target":"graph","created_at":"2026-07-04T17:09:35Z","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/0802.3914/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report evidence for a bimodality in damped Ly systems (DLAs). Using [C II] 158 mu cooling rates, lc, we find a distribution with peaks at lc=10^-27.4 and 10^-26.6 ergs s^-1 H^-1 separated by a trough at lc^crit ~= lc < 10^-27.0 ergs s^-1 H^-1. We divide the sample into low cool DLAs with lc < lc^crit and high cool DLAs with lc > lc^crit and find the Kolmogorv-Smirnov probabilities that velocity width, metallicity, dust-to-gas ratio, and Si II equivalent width in the two subsamples are drawn from the same parent population are small. All these quantities are significantly larger in the high ","authors_text":"Arthur M. Wolfe, Jason X. Prochaska, Marc Rafelski, Regina A. Jorgenson","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-02-26T21:32:06Z","title":"Bimodality in Damped Lyman alpha Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0802.3914","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":"sha256:949d68b2413f6962f507e2ab6bab3d911e71196dfdd4f1bb1b8e0d4e34eb586b","target":"record","created_at":"2026-07-04T17:09:35Z","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":"b7d01245c158ccec1582c29682e980671172e8278b4c03cd9d299be0be32cc3a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-02-26T21:32:06Z","title_canon_sha256":"6f2d0f5e0b51461016fd9352334e9f94de6ed642d69722aca79116cd911cf269"},"schema_version":"1.0","source":{"id":"0802.3914","kind":"arxiv","version":1}},"canonical_sha256":"f6981ebfb88ab70eb972409cf5ed42790ca3a8b396d1944e49768a7471a0dab1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f6981ebfb88ab70eb972409cf5ed42790ca3a8b396d1944e49768a7471a0dab1","first_computed_at":"2026-07-04T17:09:35.465667Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:09:35.465667Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QN6L5GQHrC/nA122Rts1qbi5cHbvNT4xI4yaXdNyd7cVbjCmX3h3sMoRpbnVJlCOAyjhgct6+M/2x3TNjSdmCg==","signature_status":"signed_v1","signed_at":"2026-07-04T17:09:35.466018Z","signed_message":"canonical_sha256_bytes"},"source_id":"0802.3914","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:949d68b2413f6962f507e2ab6bab3d911e71196dfdd4f1bb1b8e0d4e34eb586b","sha256:f7025fb7dec2c0a6270c292319a7cce3cdec351fe5162a1acab11ba8c9d4bdeb"],"state_sha256":"8abf6371f41ac9c906465553635e46f1610196c04cf47cf1af21a49e1fd7b83d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mf6Gl5Gks5Cju7G+mhhBpcg6ok9qKjPqjBNKD+vXuu9fX2DIKtij84YgLalsBsJyCzwLJtJp1ELY4odR3006Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T09:46:40.744645Z","bundle_sha256":"7b98ab19aa7418ae5e9fce2de3afc00fa82dc2308c1bba50af0734e798582cef"}}