{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2000:X7O6EP44Z3YOFCUUIJF5PA4DWJ","short_pith_number":"pith:X7O6EP44","schema_version":"1.0","canonical_sha256":"bfdde23f9ccef0e28a94424bd78383b2619a9088541bd37391932f7403d4b740","source":{"kind":"arxiv","id":"astro-ph/0003457","version":1},"attestation_state":"computed","paper":{"title":"Mid-infrared ISO spectroscopy of NGC 4945","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A.F.M. Moorwood (1), A.G.G.M. Tielens (2) ((1) ESO (2) Kapteyn Astronomical Institute (3) MPE), D. Lutz (3), H.W.W. Spoon (1), J. Koornneef (2)","submitted_at":"2000-03-30T16:33:18Z","abstract_excerpt":"We have observed the central region of the nearby starburst galaxy NGC4945 with the mid-infrared spectrometers SWS and PHT-S aboard ISO. We do not find any evidence for the existence of the powerful AGN, inferred from hard X-ray observations. The upper limits on our AGN tracers [NeV] 14.32um & 24.32um and [NeVI] 7.65um imply an A(V)>160 towards the NLR, assuming the NLR to be of equal strength as in the Circinus galaxy. Other possibilities are discussed. The starburst excitation indicators [NeIII]15.56um/[NeII]12.81um and L(bol)/L(lyc) suggest that the starburst in the central region is at lea"},"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":"astro-ph/0003457","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-03-30T16:33:18Z","cross_cats_sorted":[],"title_canon_sha256":"e6fd03af2af9d9b17341121fcdf9b0e1d6d2f602479cc7b1ac28970939a8464e","abstract_canon_sha256":"c670ec88ca77c3791653b8111574cc0f44f09945e7d8c86b1dfc2183983e67c5"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T14:10:16.164330Z","signature_b64":"GWx7WzNKXPhk/tKDniqHzMqNFuBu1HVL4p7mtSQ2ZYnz+gTP8U1eUJMOqttF2sSam21Nu6pfQ4Vp1NGNRZDyDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bfdde23f9ccef0e28a94424bd78383b2619a9088541bd37391932f7403d4b740","last_reissued_at":"2026-07-04T14:10:16.163937Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T14:10:16.163937Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Mid-infrared ISO spectroscopy of NGC 4945","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A.F.M. Moorwood (1), A.G.G.M. Tielens (2) ((1) ESO (2) Kapteyn Astronomical Institute (3) MPE), D. Lutz (3), H.W.W. Spoon (1), J. Koornneef (2)","submitted_at":"2000-03-30T16:33:18Z","abstract_excerpt":"We have observed the central region of the nearby starburst galaxy NGC4945 with the mid-infrared spectrometers SWS and PHT-S aboard ISO. We do not find any evidence for the existence of the powerful AGN, inferred from hard X-ray observations. The upper limits on our AGN tracers [NeV] 14.32um & 24.32um and [NeVI] 7.65um imply an A(V)>160 towards the NLR, assuming the NLR to be of equal strength as in the Circinus galaxy. Other possibilities are discussed. The starburst excitation indicators [NeIII]15.56um/[NeII]12.81um and L(bol)/L(lyc) suggest that the starburst in the central region is at lea"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0003457","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/0003457/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":"astro-ph/0003457","created_at":"2026-07-04T14:10:16.163992+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0003457v1","created_at":"2026-07-04T14:10:16.163992+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0003457","created_at":"2026-07-04T14:10:16.163992+00:00"},{"alias_kind":"pith_short_12","alias_value":"X7O6EP44Z3YO","created_at":"2026-07-04T14:10:16.163992+00:00"},{"alias_kind":"pith_short_16","alias_value":"X7O6EP44Z3YOFCUU","created_at":"2026-07-04T14:10:16.163992+00:00"},{"alias_kind":"pith_short_8","alias_value":"X7O6EP44","created_at":"2026-07-04T14:10:16.163992+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2412.07862","citing_title":"Tracing the earliest stages of star and cluster formation in 19 nearby galaxies with PHANGS-JWST and HST: compact 3.3 $\\mu$m PAH emitters and their relation to the optical census of star clusters","ref_index":67,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/X7O6EP44Z3YOFCUUIJF5PA4DWJ","json":"https://pith.science/pith/X7O6EP44Z3YOFCUUIJF5PA4DWJ.json","graph_json":"https://pith.science/api/pith-number/X7O6EP44Z3YOFCUUIJF5PA4DWJ/graph.json","events_json":"https://pith.science/api/pith-number/X7O6EP44Z3YOFCUUIJF5PA4DWJ/events.json","paper":"https://pith.science/paper/X7O6EP44"},"agent_actions":{"view_html":"https://pith.science/pith/X7O6EP44Z3YOFCUUIJF5PA4DWJ","download_json":"https://pith.science/pith/X7O6EP44Z3YOFCUUIJF5PA4DWJ.json","view_paper":"https://pith.science/paper/X7O6EP44","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0003457&json=true","fetch_graph":"https://pith.science/api/pith-number/X7O6EP44Z3YOFCUUIJF5PA4DWJ/graph.json","fetch_events":"https://pith.science/api/pith-number/X7O6EP44Z3YOFCUUIJF5PA4DWJ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/X7O6EP44Z3YOFCUUIJF5PA4DWJ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/X7O6EP44Z3YOFCUUIJF5PA4DWJ/action/storage_attestation","attest_author":"https://pith.science/pith/X7O6EP44Z3YOFCUUIJF5PA4DWJ/action/author_attestation","sign_citation":"https://pith.science/pith/X7O6EP44Z3YOFCUUIJF5PA4DWJ/action/citation_signature","submit_replication":"https://pith.science/pith/X7O6EP44Z3YOFCUUIJF5PA4DWJ/action/replication_record"}},"created_at":"2026-07-04T14:10:16.163992+00:00","updated_at":"2026-07-04T14:10:16.163992+00:00"}