{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:F2TC2QPLIBGMUXAZU3UTF4XVDK","short_pith_number":"pith:F2TC2QPL","canonical_record":{"source":{"id":"astro-ph/0409308","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-09-13T20:53:56Z","cross_cats_sorted":[],"title_canon_sha256":"e67e816e0fe07a2f6dac71c88385d285119c70453aeddeb87c45a955149cf433","abstract_canon_sha256":"bb88e43ea50d6a68076710796916933eb0852dc2ebfa8ca862a77f4b239de96d"},"schema_version":"1.0"},"canonical_sha256":"2ea62d41eb404cca5c19a6e932f2f51aabbc1d58a44b1589e2d971758dc1e43e","source":{"kind":"arxiv","id":"astro-ph/0409308","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0409308","created_at":"2026-07-04T16:44:41Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0409308v1","created_at":"2026-07-04T16:44:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0409308","created_at":"2026-07-04T16:44:41Z"},{"alias_kind":"pith_short_12","alias_value":"F2TC2QPLIBGM","created_at":"2026-07-04T16:44:41Z"},{"alias_kind":"pith_short_16","alias_value":"F2TC2QPLIBGMUXAZ","created_at":"2026-07-04T16:44:41Z"},{"alias_kind":"pith_short_8","alias_value":"F2TC2QPL","created_at":"2026-07-04T16:44:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:F2TC2QPLIBGMUXAZU3UTF4XVDK","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0409308","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-09-13T20:53:56Z","cross_cats_sorted":[],"title_canon_sha256":"e67e816e0fe07a2f6dac71c88385d285119c70453aeddeb87c45a955149cf433","abstract_canon_sha256":"bb88e43ea50d6a68076710796916933eb0852dc2ebfa8ca862a77f4b239de96d"},"schema_version":"1.0"},"canonical_sha256":"2ea62d41eb404cca5c19a6e932f2f51aabbc1d58a44b1589e2d971758dc1e43e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:44:41.259067Z","signature_b64":"4JHIeyYplrS/vZePhRpIw1FQTaeS1v4hm1RV5qU/6KAKKNXNu7gUrU2IkMujjDWLuIiN1LC3A8LkjaBznC9hAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2ea62d41eb404cca5c19a6e932f2f51aabbc1d58a44b1589e2d971758dc1e43e","last_reissued_at":"2026-07-04T16:44:41.258701Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:44:41.258701Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0409308","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":"2026-07-04T16:44:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+XjudAOCPB6w76kxPkjvy5FeVKxqAP4bB3bByrJmxzhElSzOpZwBr2jVgtdlDO8DRsmCpk/Z18JLHT3nqnW2Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T20:28:55.940646Z"},"content_sha256":"af7e93ca6d769c1c76cdaf3f34c752729e306bdd2a997072366dfc4bdae22b1e","schema_version":"1.0","event_id":"sha256:af7e93ca6d769c1c76cdaf3f34c752729e306bdd2a997072366dfc4bdae22b1e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:F2TC2QPLIBGMUXAZU3UTF4XVDK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A New Probe of the Planet-Forming Region in T Tauri Disks","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Chunhua Qi, David K. Lynch, Edwin A. Bergin, Evelyne Roueff, Gregory J. Herczeg, Herve Abgrall, Michael L. Sitko, Nuria Calvet, Paola D'Alessio, Ray W. Russell, R. Brad Perry, Suellen M. Brafford","submitted_at":"2004-09-13T20:53:56Z","abstract_excerpt":"We present new observations of the FUV (1100-2200 Angstrom) radiation field and the near- to mid-IR (3--13.5 micron) spectral energy distribution (SED) of a sample of T Tauri stars selected on the basis of bright molecular disks (GM Aur, DM Tau, LkCa15). In each source we find evidence for Ly alpha induced H2 fluorescence and an additional source of FUV continuum emission below 1700 Angstroms. Comparison of the FUV spectra to a model of H2 excitation suggests that the strong continuum emission is due to electron impact excitation of H2. The ultimate source of this excitation is likely X-ray ir"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0409308","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/astro-ph/0409308/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":"2026-07-04T16:44:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xW3D+zxBtsHg5Z36Kq95ERg2nFGzLHpvbd4gy/ADSS0kP8U73Z0dZOVeWUwQaX09ZIFgBoFgqEMvdqY9tPUABg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T20:28:55.941180Z"},"content_sha256":"363fe7707da438edb68aa5566e0f492ebb2ba51d6f124f8e7c65e798adf4bb2b","schema_version":"1.0","event_id":"sha256:363fe7707da438edb68aa5566e0f492ebb2ba51d6f124f8e7c65e798adf4bb2b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/F2TC2QPLIBGMUXAZU3UTF4XVDK/bundle.json","state_url":"https://pith.science/pith/F2TC2QPLIBGMUXAZU3UTF4XVDK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/F2TC2QPLIBGMUXAZU3UTF4XVDK/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":"2026-08-11T20:28:55Z","links":{"resolver":"https://pith.science/pith/F2TC2QPLIBGMUXAZU3UTF4XVDK","bundle":"https://pith.science/pith/F2TC2QPLIBGMUXAZU3UTF4XVDK/bundle.json","state":"https://pith.science/pith/F2TC2QPLIBGMUXAZU3UTF4XVDK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/F2TC2QPLIBGMUXAZU3UTF4XVDK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:F2TC2QPLIBGMUXAZU3UTF4XVDK","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":"bb88e43ea50d6a68076710796916933eb0852dc2ebfa8ca862a77f4b239de96d","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-09-13T20:53:56Z","title_canon_sha256":"e67e816e0fe07a2f6dac71c88385d285119c70453aeddeb87c45a955149cf433"},"schema_version":"1.0","source":{"id":"astro-ph/0409308","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0409308","created_at":"2026-07-04T16:44:41Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0409308v1","created_at":"2026-07-04T16:44:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0409308","created_at":"2026-07-04T16:44:41Z"},{"alias_kind":"pith_short_12","alias_value":"F2TC2QPLIBGM","created_at":"2026-07-04T16:44:41Z"},{"alias_kind":"pith_short_16","alias_value":"F2TC2QPLIBGMUXAZ","created_at":"2026-07-04T16:44:41Z"},{"alias_kind":"pith_short_8","alias_value":"F2TC2QPL","created_at":"2026-07-04T16:44:41Z"}],"graph_snapshots":[{"event_id":"sha256:363fe7707da438edb68aa5566e0f492ebb2ba51d6f124f8e7c65e798adf4bb2b","target":"graph","created_at":"2026-07-04T16:44:41Z","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/astro-ph/0409308/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present new observations of the FUV (1100-2200 Angstrom) radiation field and the near- to mid-IR (3--13.5 micron) spectral energy distribution (SED) of a sample of T Tauri stars selected on the basis of bright molecular disks (GM Aur, DM Tau, LkCa15). In each source we find evidence for Ly alpha induced H2 fluorescence and an additional source of FUV continuum emission below 1700 Angstroms. Comparison of the FUV spectra to a model of H2 excitation suggests that the strong continuum emission is due to electron impact excitation of H2. The ultimate source of this excitation is likely X-ray ir","authors_text":"Chunhua Qi, David K. Lynch, Edwin A. Bergin, Evelyne Roueff, Gregory J. Herczeg, Herve Abgrall, Michael L. Sitko, Nuria Calvet, Paola D'Alessio, Ray W. Russell, R. Brad Perry, Suellen M. Brafford","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2004-09-13T20:53:56Z","title":"A New Probe of the Planet-Forming Region in T Tauri Disks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0409308","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:af7e93ca6d769c1c76cdaf3f34c752729e306bdd2a997072366dfc4bdae22b1e","target":"record","created_at":"2026-07-04T16:44:41Z","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":"bb88e43ea50d6a68076710796916933eb0852dc2ebfa8ca862a77f4b239de96d","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-09-13T20:53:56Z","title_canon_sha256":"e67e816e0fe07a2f6dac71c88385d285119c70453aeddeb87c45a955149cf433"},"schema_version":"1.0","source":{"id":"astro-ph/0409308","kind":"arxiv","version":1}},"canonical_sha256":"2ea62d41eb404cca5c19a6e932f2f51aabbc1d58a44b1589e2d971758dc1e43e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2ea62d41eb404cca5c19a6e932f2f51aabbc1d58a44b1589e2d971758dc1e43e","first_computed_at":"2026-07-04T16:44:41.258701Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:44:41.258701Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4JHIeyYplrS/vZePhRpIw1FQTaeS1v4hm1RV5qU/6KAKKNXNu7gUrU2IkMujjDWLuIiN1LC3A8LkjaBznC9hAA==","signature_status":"signed_v1","signed_at":"2026-07-04T16:44:41.259067Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0409308","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:af7e93ca6d769c1c76cdaf3f34c752729e306bdd2a997072366dfc4bdae22b1e","sha256:363fe7707da438edb68aa5566e0f492ebb2ba51d6f124f8e7c65e798adf4bb2b"],"state_sha256":"e79b00e1189b513862cb976956636ad2edc9e6257348a9e9a9e60166ac7d3d0f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Pz4UZo1lEvHGYfRJSkSLnPgSufyEAEfIg59jChS1/1Xgush3ztwynbSJr9f7dJBBs3ucf1gWvfVUyunWkOnHBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T20:28:55.945392Z","bundle_sha256":"41bca51e4b0c54d9a0006b54273d8cf1bffc50bcc8049906a61041243f5f89cf"}}