{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2020:NZQQ27ZQB6UGKFPHH3DWGECGOT","short_pith_number":"pith:NZQQ27ZQ","schema_version":"1.0","canonical_sha256":"6e610d7f300fa86515e73ec763104674c3a8f32405c7c2bf9b61c4fabd1c6d8e","source":{"kind":"arxiv","id":"2009.00676","version":1},"attestation_state":"computed","paper":{"title":"Extinction in the 11.2 micron PAH band and the low L_11.2/L_IR in ULIRGs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Almudena Alonso-Herrero, Alvaro Labiano, Antonio Hernan-Caballero, Dimitra Rigopoulou, Evanthia Hatziminaoglou, Georgios E. Magdis, Henrik W. W. Spoon, Isabella Cortzen, Javier Piqueras, Miguel Pereira-Santaella, Pablo G. Perez-Gonzalez, Santiago Arribas","submitted_at":"2020-09-01T20:03:40Z","abstract_excerpt":"We present a method for recovering the intrinsic (extinction-corrected) luminosity of the 11.2 micron PAH band in galaxy spectra. Using 105 high S/N Spitzer/IRS spectra of star-forming galaxies, we show that the equivalent width ratio of the 12.7 and 11.2 micron PAH bands is independent on the optical depth, with small dispersion of ~5% indicative of a nearly constant intrinsic flux ratio R_int = (f_12.7/f_11.2)_int = 0.377 +/- 0.020. Conversely, the observed flux ratio, R_obs = (f_12.7/f_11.2)_obs strongly correlates with the silicate strength (S_sil) confirming that differences in R_obs refl"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2009.00676","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-09-01T20:03:40Z","cross_cats_sorted":[],"title_canon_sha256":"6c51fbebe1fd380426c24fb3df29d40ace9943d75a2139aff9af89d4b3580e73","abstract_canon_sha256":"0f4943d5aff6268413ff1792bfb43f0bf4838ccea24b3e727757b12ea04e36ce"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:33:44.317179Z","signature_b64":"TNwokGL/7UeOZTH0l7of9vSxlqetLWYnK0EQYBj13zZPeSnxuw1Z69tfwOkwHwcHMeLyKTFB2HKBHD0ZjctcCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6e610d7f300fa86515e73ec763104674c3a8f32405c7c2bf9b61c4fabd1c6d8e","last_reissued_at":"2026-07-05T01:33:44.316742Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:33:44.316742Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Extinction in the 11.2 micron PAH band and the low L_11.2/L_IR in ULIRGs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Almudena Alonso-Herrero, Alvaro Labiano, Antonio Hernan-Caballero, Dimitra Rigopoulou, Evanthia Hatziminaoglou, Georgios E. Magdis, Henrik W. W. Spoon, Isabella Cortzen, Javier Piqueras, Miguel Pereira-Santaella, Pablo G. Perez-Gonzalez, Santiago Arribas","submitted_at":"2020-09-01T20:03:40Z","abstract_excerpt":"We present a method for recovering the intrinsic (extinction-corrected) luminosity of the 11.2 micron PAH band in galaxy spectra. Using 105 high S/N Spitzer/IRS spectra of star-forming galaxies, we show that the equivalent width ratio of the 12.7 and 11.2 micron PAH bands is independent on the optical depth, with small dispersion of ~5% indicative of a nearly constant intrinsic flux ratio R_int = (f_12.7/f_11.2)_int = 0.377 +/- 0.020. Conversely, the observed flux ratio, R_obs = (f_12.7/f_11.2)_obs strongly correlates with the silicate strength (S_sil) confirming that differences in R_obs refl"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.00676","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/2009.00676/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2009.00676","created_at":"2026-07-05T01:33:44.316812+00:00"},{"alias_kind":"arxiv_version","alias_value":"2009.00676v1","created_at":"2026-07-05T01:33:44.316812+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.00676","created_at":"2026-07-05T01:33:44.316812+00:00"},{"alias_kind":"pith_short_12","alias_value":"NZQQ27ZQB6UG","created_at":"2026-07-05T01:33:44.316812+00:00"},{"alias_kind":"pith_short_16","alias_value":"NZQQ27ZQB6UGKFPH","created_at":"2026-07-05T01:33:44.316812+00:00"},{"alias_kind":"pith_short_8","alias_value":"NZQQ27ZQ","created_at":"2026-07-05T01:33:44.316812+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/NZQQ27ZQB6UGKFPHH3DWGECGOT","json":"https://pith.science/pith/NZQQ27ZQB6UGKFPHH3DWGECGOT.json","graph_json":"https://pith.science/api/pith-number/NZQQ27ZQB6UGKFPHH3DWGECGOT/graph.json","events_json":"https://pith.science/api/pith-number/NZQQ27ZQB6UGKFPHH3DWGECGOT/events.json","paper":"https://pith.science/paper/NZQQ27ZQ"},"agent_actions":{"view_html":"https://pith.science/pith/NZQQ27ZQB6UGKFPHH3DWGECGOT","download_json":"https://pith.science/pith/NZQQ27ZQB6UGKFPHH3DWGECGOT.json","view_paper":"https://pith.science/paper/NZQQ27ZQ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2009.00676&json=true","fetch_graph":"https://pith.science/api/pith-number/NZQQ27ZQB6UGKFPHH3DWGECGOT/graph.json","fetch_events":"https://pith.science/api/pith-number/NZQQ27ZQB6UGKFPHH3DWGECGOT/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/NZQQ27ZQB6UGKFPHH3DWGECGOT/action/timestamp_anchor","attest_storage":"https://pith.science/pith/NZQQ27ZQB6UGKFPHH3DWGECGOT/action/storage_attestation","attest_author":"https://pith.science/pith/NZQQ27ZQB6UGKFPHH3DWGECGOT/action/author_attestation","sign_citation":"https://pith.science/pith/NZQQ27ZQB6UGKFPHH3DWGECGOT/action/citation_signature","submit_replication":"https://pith.science/pith/NZQQ27ZQB6UGKFPHH3DWGECGOT/action/replication_record"}},"created_at":"2026-07-05T01:33:44.316812+00:00","updated_at":"2026-07-05T01:33:44.316812+00:00"}