{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2006:IAKPLOM3RPMMWYIGHXL3FTWL3O","short_pith_number":"pith:IAKPLOM3","canonical_record":{"source":{"id":"astro-ph/0609157","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-09-06T14:16:34Z","cross_cats_sorted":[],"title_canon_sha256":"7213fb309971144ec88f6bbda344623f8a832cad3205dff07d36b6f21faf7eca","abstract_canon_sha256":"f91be9ffdfb28e8b428a1dff05c2f8e02f83915c1d93e4255a8de45adeff8a17"},"schema_version":"1.0"},"canonical_sha256":"4014f5b99b8bd8cb61063dd7b2cecbdbba2bc53cc113bb959a20500521d43ac2","source":{"kind":"arxiv","id":"astro-ph/0609157","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0609157","created_at":"2026-07-04T16:59:21Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0609157v1","created_at":"2026-07-04T16:59:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0609157","created_at":"2026-07-04T16:59:21Z"},{"alias_kind":"pith_short_12","alias_value":"IAKPLOM3RPMM","created_at":"2026-07-04T16:59:21Z"},{"alias_kind":"pith_short_16","alias_value":"IAKPLOM3RPMMWYIG","created_at":"2026-07-04T16:59:21Z"},{"alias_kind":"pith_short_8","alias_value":"IAKPLOM3","created_at":"2026-07-04T16:59:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2006:IAKPLOM3RPMMWYIGHXL3FTWL3O","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0609157","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-09-06T14:16:34Z","cross_cats_sorted":[],"title_canon_sha256":"7213fb309971144ec88f6bbda344623f8a832cad3205dff07d36b6f21faf7eca","abstract_canon_sha256":"f91be9ffdfb28e8b428a1dff05c2f8e02f83915c1d93e4255a8de45adeff8a17"},"schema_version":"1.0"},"canonical_sha256":"4014f5b99b8bd8cb61063dd7b2cecbdbba2bc53cc113bb959a20500521d43ac2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:59:21.686908Z","signature_b64":"KGRPPUk820J7E4HBHaBS19brXuVQEv5sRNHvILrB4A8mRIP580w5XY0dMlUAlMpEQ5qg3C73MoZpoW2Qotl4CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4014f5b99b8bd8cb61063dd7b2cecbdbba2bc53cc113bb959a20500521d43ac2","last_reissued_at":"2026-07-04T16:59:21.686557Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:59:21.686557Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0609157","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":"2026-07-04T16:59:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"haBok91GJ54URiJdXk9Gi0Yuzrvq1Coqx56+94qJDg/krBZGKYG3myY+xFGO6+OFrkO2vigXS36DASU0e8VCDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T21:53:05.713711Z"},"content_sha256":"045e31b559cce506573cac898a8b443593791e8fbf3651a424b6270ccf24cbc2","schema_version":"1.0","event_id":"sha256:045e31b559cce506573cac898a8b443593791e8fbf3651a424b6270ccf24cbc2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2006:IAKPLOM3RPMMWYIGHXL3FTWL3O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spitzer-IRS spectra of disks around T Tauri stars II. PAH emission features","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A.C.A. Boogert, B. Merin, C.P. Dullemond, E.F. van Dishoeck, F. Lahuis, G.A. Blake, J.-C. Augereau, J.E. Kessler-Silacci, J.M. Brown, K.M. Pontoppidan, N.J. Evans II, R. Visser, V.C. Geers","submitted_at":"2006-09-06T14:16:34Z","abstract_excerpt":"Aims: We search for PAH features towards T Tauri stars and compare them with surveys of Herbig Ae/Be stars. The presence and strength of the PAH features are interpreted with disk radiative transfer models exploring the PAH feature dependence on the incident UV radiation, PAH abundance and disk parameters.\n  Methods: Spitzer Space Telescope 5-35 micron spectra of 54 pre-main sequence stars with disks were obtained, consisting of 38 T Tauri, 7 Herbig Ae/Be and 9 stars with unknown spectral type.\n  Results: Compact PAH emission is detected towards at least 8 sources of which 5 are Herbig Ae/Be s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0609157","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/0609157/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":"2026-07-04T16:59:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sPqSHl4SrrEo5x39SjqqEShqKACEdtC/rzbpOEv0RjvHl6cXCS5MZLdU98stWNH6fmBpmh56EuijuErgfCfyDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T21:53:05.714583Z"},"content_sha256":"f675b0ade5ab81df933bc4cf748efd4d63bf581f984dad6aae1cc5dc5d5728be","schema_version":"1.0","event_id":"sha256:f675b0ade5ab81df933bc4cf748efd4d63bf581f984dad6aae1cc5dc5d5728be"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IAKPLOM3RPMMWYIGHXL3FTWL3O/bundle.json","state_url":"https://pith.science/pith/IAKPLOM3RPMMWYIGHXL3FTWL3O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IAKPLOM3RPMMWYIGHXL3FTWL3O/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":"2026-08-06T21:53:05Z","links":{"resolver":"https://pith.science/pith/IAKPLOM3RPMMWYIGHXL3FTWL3O","bundle":"https://pith.science/pith/IAKPLOM3RPMMWYIGHXL3FTWL3O/bundle.json","state":"https://pith.science/pith/IAKPLOM3RPMMWYIGHXL3FTWL3O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IAKPLOM3RPMMWYIGHXL3FTWL3O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:IAKPLOM3RPMMWYIGHXL3FTWL3O","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":"f91be9ffdfb28e8b428a1dff05c2f8e02f83915c1d93e4255a8de45adeff8a17","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-09-06T14:16:34Z","title_canon_sha256":"7213fb309971144ec88f6bbda344623f8a832cad3205dff07d36b6f21faf7eca"},"schema_version":"1.0","source":{"id":"astro-ph/0609157","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0609157","created_at":"2026-07-04T16:59:21Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0609157v1","created_at":"2026-07-04T16:59:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0609157","created_at":"2026-07-04T16:59:21Z"},{"alias_kind":"pith_short_12","alias_value":"IAKPLOM3RPMM","created_at":"2026-07-04T16:59:21Z"},{"alias_kind":"pith_short_16","alias_value":"IAKPLOM3RPMMWYIG","created_at":"2026-07-04T16:59:21Z"},{"alias_kind":"pith_short_8","alias_value":"IAKPLOM3","created_at":"2026-07-04T16:59:21Z"}],"graph_snapshots":[{"event_id":"sha256:f675b0ade5ab81df933bc4cf748efd4d63bf581f984dad6aae1cc5dc5d5728be","target":"graph","created_at":"2026-07-04T16:59:21Z","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/0609157/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Aims: We search for PAH features towards T Tauri stars and compare them with surveys of Herbig Ae/Be stars. The presence and strength of the PAH features are interpreted with disk radiative transfer models exploring the PAH feature dependence on the incident UV radiation, PAH abundance and disk parameters.\n  Methods: Spitzer Space Telescope 5-35 micron spectra of 54 pre-main sequence stars with disks were obtained, consisting of 38 T Tauri, 7 Herbig Ae/Be and 9 stars with unknown spectral type.\n  Results: Compact PAH emission is detected towards at least 8 sources of which 5 are Herbig Ae/Be s","authors_text":"A.C.A. Boogert, B. Merin, C.P. Dullemond, E.F. van Dishoeck, F. Lahuis, G.A. Blake, J.-C. Augereau, J.E. Kessler-Silacci, J.M. Brown, K.M. Pontoppidan, N.J. Evans II, R. Visser, V.C. Geers","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2006-09-06T14:16:34Z","title":"Spitzer-IRS spectra of disks around T Tauri stars II. PAH emission features"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0609157","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":"sha256:045e31b559cce506573cac898a8b443593791e8fbf3651a424b6270ccf24cbc2","target":"record","created_at":"2026-07-04T16:59:21Z","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":"f91be9ffdfb28e8b428a1dff05c2f8e02f83915c1d93e4255a8de45adeff8a17","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-09-06T14:16:34Z","title_canon_sha256":"7213fb309971144ec88f6bbda344623f8a832cad3205dff07d36b6f21faf7eca"},"schema_version":"1.0","source":{"id":"astro-ph/0609157","kind":"arxiv","version":1}},"canonical_sha256":"4014f5b99b8bd8cb61063dd7b2cecbdbba2bc53cc113bb959a20500521d43ac2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4014f5b99b8bd8cb61063dd7b2cecbdbba2bc53cc113bb959a20500521d43ac2","first_computed_at":"2026-07-04T16:59:21.686557Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:59:21.686557Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KGRPPUk820J7E4HBHaBS19brXuVQEv5sRNHvILrB4A8mRIP580w5XY0dMlUAlMpEQ5qg3C73MoZpoW2Qotl4CQ==","signature_status":"signed_v1","signed_at":"2026-07-04T16:59:21.686908Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0609157","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:045e31b559cce506573cac898a8b443593791e8fbf3651a424b6270ccf24cbc2","sha256:f675b0ade5ab81df933bc4cf748efd4d63bf581f984dad6aae1cc5dc5d5728be"],"state_sha256":"6d250e9258f54dbd6e369c10213ad93a8bcf788d688e2b282a8e3ef5ebec1964"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iYFWPdFJn0vsAAXmpfylQcct25zYQgV5M8DzHAEFkzxRc8thWmEiB0pgHTNHChmkcgTLbcAGxqI/bfzVmbB0Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T21:53:05.720817Z","bundle_sha256":"acd3a4573ae436aa1fce72b34a0c0c8ca111a0b2244e6843c5c2c33b8b711364"}}