{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2003:4T3ZMWJZ4U5BFWXHRYYYXLZW6H","short_pith_number":"pith:4T3ZMWJZ","schema_version":"1.0","canonical_sha256":"e4f7965939e53a12dae78e318baf36f1d31a6f7f7c12d3e05755a2d095b2d40a","source":{"kind":"arxiv","id":"astro-ph/0303259","version":1},"attestation_state":"computed","paper":{"title":"Spatially-resolved spectrophotometric analysis and modelling of the Superantennae","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Alberto Franceschini, Alessandro Bressan, Claudio Pernechele, Jacopo Fritz, Stefano Berta","submitted_at":"2003-03-12T15:33:15Z","abstract_excerpt":"We have performed spatially-resolved spectroscopy of the double-nucleated Ultra-Luminous Infrared Galaxy IRAS 19254-7245, ``the Superantennae'', along the line connecting the two nuclei. These data are analysed with a spectral synthesis code, to derive the star formation and extinction properties of the galaxy. The star formation history (SFH) of the two nuclei is similarly characterized by two different main episodes: a recent burst, responsible of the observed emission lines, and an older one, occurred roughly 1 Gyr ago. We tentatively associate this bimodal SFH with a double encounter in th"},"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/0303259","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-03-12T15:33:15Z","cross_cats_sorted":[],"title_canon_sha256":"c2efd7560454dfb8a1ad0d3200280fef9a7acf708b0d668d57db8daf8a5e92bf","abstract_canon_sha256":"150da1ad8f113d6f67e3e1d1c3da8769c645fc4323c7590c53ce2fc2b662fdf6"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:36:38.792060Z","signature_b64":"K5NO5GRh81q5u8YFAm7gBbBN6v2aPC+uTIQC4TnDvq8Txo/yUif9cvaznmpQQO+ykkL7pHf8U3UQ+GIPNOxoAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e4f7965939e53a12dae78e318baf36f1d31a6f7f7c12d3e05755a2d095b2d40a","last_reissued_at":"2026-07-04T16:36:38.791673Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:36:38.791673Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Spatially-resolved spectrophotometric analysis and modelling of the Superantennae","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Alberto Franceschini, Alessandro Bressan, Claudio Pernechele, Jacopo Fritz, Stefano Berta","submitted_at":"2003-03-12T15:33:15Z","abstract_excerpt":"We have performed spatially-resolved spectroscopy of the double-nucleated Ultra-Luminous Infrared Galaxy IRAS 19254-7245, ``the Superantennae'', along the line connecting the two nuclei. These data are analysed with a spectral synthesis code, to derive the star formation and extinction properties of the galaxy. The star formation history (SFH) of the two nuclei is similarly characterized by two different main episodes: a recent burst, responsible of the observed emission lines, and an older one, occurred roughly 1 Gyr ago. We tentatively associate this bimodal SFH with a double encounter in th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0303259","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/0303259/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/0303259","created_at":"2026-07-04T16:36:38.791740+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0303259v1","created_at":"2026-07-04T16:36:38.791740+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0303259","created_at":"2026-07-04T16:36:38.791740+00:00"},{"alias_kind":"pith_short_12","alias_value":"4T3ZMWJZ4U5B","created_at":"2026-07-04T16:36:38.791740+00:00"},{"alias_kind":"pith_short_16","alias_value":"4T3ZMWJZ4U5BFWXH","created_at":"2026-07-04T16:36:38.791740+00:00"},{"alias_kind":"pith_short_8","alias_value":"4T3ZMWJZ","created_at":"2026-07-04T16:36:38.791740+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/4T3ZMWJZ4U5BFWXHRYYYXLZW6H","json":"https://pith.science/pith/4T3ZMWJZ4U5BFWXHRYYYXLZW6H.json","graph_json":"https://pith.science/api/pith-number/4T3ZMWJZ4U5BFWXHRYYYXLZW6H/graph.json","events_json":"https://pith.science/api/pith-number/4T3ZMWJZ4U5BFWXHRYYYXLZW6H/events.json","paper":"https://pith.science/paper/4T3ZMWJZ"},"agent_actions":{"view_html":"https://pith.science/pith/4T3ZMWJZ4U5BFWXHRYYYXLZW6H","download_json":"https://pith.science/pith/4T3ZMWJZ4U5BFWXHRYYYXLZW6H.json","view_paper":"https://pith.science/paper/4T3ZMWJZ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0303259&json=true","fetch_graph":"https://pith.science/api/pith-number/4T3ZMWJZ4U5BFWXHRYYYXLZW6H/graph.json","fetch_events":"https://pith.science/api/pith-number/4T3ZMWJZ4U5BFWXHRYYYXLZW6H/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4T3ZMWJZ4U5BFWXHRYYYXLZW6H/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4T3ZMWJZ4U5BFWXHRYYYXLZW6H/action/storage_attestation","attest_author":"https://pith.science/pith/4T3ZMWJZ4U5BFWXHRYYYXLZW6H/action/author_attestation","sign_citation":"https://pith.science/pith/4T3ZMWJZ4U5BFWXHRYYYXLZW6H/action/citation_signature","submit_replication":"https://pith.science/pith/4T3ZMWJZ4U5BFWXHRYYYXLZW6H/action/replication_record"}},"created_at":"2026-07-04T16:36:38.791740+00:00","updated_at":"2026-07-04T16:36:38.791740+00:00"}