{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2008:6AM4OQXFA5EBTPVPPKNLP6QQF4","short_pith_number":"pith:6AM4OQXF","schema_version":"1.0","canonical_sha256":"f019c742e5074819beaf7a9ab7fa102f166ace1ee7ef08f9a573b69977ed216b","source":{"kind":"arxiv","id":"0810.4561","version":2},"attestation_state":"computed","paper":{"title":"Observational $5-20\\mu$m Interstellar Extinction Curves Toward Star-Forming Regions Derived from Spitzer IRS Spectra","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"M. K. McClure","submitted_at":"2008-10-24T22:15:28Z","abstract_excerpt":"Using \\emph{Spitzer} Infrared Spectrograph observations of G0--M4 III stars behind dark clouds, I construct $5-20\\mu$m empirical extinction curves for $0.3\\leq A_K<7$, which is equivalent to $A_V$ between $\\approx$ 3 and 50. For $A_K<1$ the curve appears similar to the \\citet{mathis90} diffuse interstellar medium extinction curve, but with a greater degree of extinction. For $A_K>1$, the curve exhibits lower contrast between the silicate and absorption continuum, developes ice absorption, and lies closer to the \\citet{wd01} $R_V=5.5$ case B curve, a result which is consistent with that of \\cit"},"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":"0810.4561","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-24T22:15:28Z","cross_cats_sorted":[],"title_canon_sha256":"c4125a8772738af508da73850c2d3e5ae690c55fe9918a90ff9d76fb5998bc0a","abstract_canon_sha256":"0526999928d52481058d9da41994cb93528a41830491a10a098d2f56bb8db03f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:25.735471Z","signature_b64":"NLVbCV+TlkZYfHK2X6xw+agXhOfQYIq3FW1n3ZZxjBGCu5NXf/tnXBTDELu3rc2Dj9fqJRq7KWt0PmqJ91xiDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f019c742e5074819beaf7a9ab7fa102f166ace1ee7ef08f9a573b69977ed216b","last_reissued_at":"2026-05-18T04:29:25.734826Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:25.734826Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Observational $5-20\\mu$m Interstellar Extinction Curves Toward Star-Forming Regions Derived from Spitzer IRS Spectra","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"M. K. McClure","submitted_at":"2008-10-24T22:15:28Z","abstract_excerpt":"Using \\emph{Spitzer} Infrared Spectrograph observations of G0--M4 III stars behind dark clouds, I construct $5-20\\mu$m empirical extinction curves for $0.3\\leq A_K<7$, which is equivalent to $A_V$ between $\\approx$ 3 and 50. For $A_K<1$ the curve appears similar to the \\citet{mathis90} diffuse interstellar medium extinction curve, but with a greater degree of extinction. For $A_K>1$, the curve exhibits lower contrast between the silicate and absorption continuum, developes ice absorption, and lies closer to the \\citet{wd01} $R_V=5.5$ case B curve, a result which is consistent with that of \\cit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.4561","kind":"arxiv","version":2},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0810.4561","created_at":"2026-05-18T04:29:25.734922+00:00"},{"alias_kind":"arxiv_version","alias_value":"0810.4561v2","created_at":"2026-05-18T04:29:25.734922+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.4561","created_at":"2026-05-18T04:29:25.734922+00:00"},{"alias_kind":"pith_short_12","alias_value":"6AM4OQXFA5EB","created_at":"2026-05-18T12:25:56.245647+00:00"},{"alias_kind":"pith_short_16","alias_value":"6AM4OQXFA5EBTPVP","created_at":"2026-05-18T12:25:56.245647+00:00"},{"alias_kind":"pith_short_8","alias_value":"6AM4OQXF","created_at":"2026-05-18T12:25:56.245647+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/6AM4OQXFA5EBTPVPPKNLP6QQF4","json":"https://pith.science/pith/6AM4OQXFA5EBTPVPPKNLP6QQF4.json","graph_json":"https://pith.science/api/pith-number/6AM4OQXFA5EBTPVPPKNLP6QQF4/graph.json","events_json":"https://pith.science/api/pith-number/6AM4OQXFA5EBTPVPPKNLP6QQF4/events.json","paper":"https://pith.science/paper/6AM4OQXF"},"agent_actions":{"view_html":"https://pith.science/pith/6AM4OQXFA5EBTPVPPKNLP6QQF4","download_json":"https://pith.science/pith/6AM4OQXFA5EBTPVPPKNLP6QQF4.json","view_paper":"https://pith.science/paper/6AM4OQXF","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0810.4561&json=true","fetch_graph":"https://pith.science/api/pith-number/6AM4OQXFA5EBTPVPPKNLP6QQF4/graph.json","fetch_events":"https://pith.science/api/pith-number/6AM4OQXFA5EBTPVPPKNLP6QQF4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/6AM4OQXFA5EBTPVPPKNLP6QQF4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/6AM4OQXFA5EBTPVPPKNLP6QQF4/action/storage_attestation","attest_author":"https://pith.science/pith/6AM4OQXFA5EBTPVPPKNLP6QQF4/action/author_attestation","sign_citation":"https://pith.science/pith/6AM4OQXFA5EBTPVPPKNLP6QQF4/action/citation_signature","submit_replication":"https://pith.science/pith/6AM4OQXFA5EBTPVPPKNLP6QQF4/action/replication_record"}},"created_at":"2026-05-18T04:29:25.734922+00:00","updated_at":"2026-05-18T04:29:25.734922+00:00"}