{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2007:HYXECVBP4VRDN2VWBFZ6KDTB4Z","short_pith_number":"pith:HYXECVBP","schema_version":"1.0","canonical_sha256":"3e2e41542fe56236eab60973e50e61e660ae292fb8d90de81326d9c70056b187","source":{"kind":"arxiv","id":"0709.2880","version":1},"attestation_state":"computed","paper":{"title":"Freshly Formed Dust in the Cassiopeia A Supernova Remnant as Revealed by the Spitzer Space Telescope","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Tappe, H. Gomez, J. A. Ennis, J. D. Smith, J. Rho, L. Rudnick, T. DeLaney, T. Kozasa, W. T. Reach","submitted_at":"2007-09-18T16:49:13Z","abstract_excerpt":"We performed Spitzer Infrared Spectrograph mapping observations covering nearly the entire extent of the Cassiopeia A supernova remnant (SNR), producing mid-infrared (5.5-35 micron) spectra every 5-10\". Gas lines of Ar, Ne, O, Si, S and Fe, and dust continua were strong for most positions. We identify three distinct ejecta dust populations based on their continuum shapes. The dominant dust continuum shape exhibits a strong peak at 21 micron. A line-free map of 21 micron-peak dust made from the 19-23 micron range closely resembles the [Ar II], [O IV], and [Ne II] ejecta-line maps implying that "},"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":"0709.2880","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-09-18T16:49:13Z","cross_cats_sorted":[],"title_canon_sha256":"5b71a47ae2b91fe013a80ce98cb0915183e20d588ceca2327a53df6ab840a8a1","abstract_canon_sha256":"63183f56f66b22e2965a3ceda6ac81fc9adc62c3cfd0b616e2dc6e6706cc214a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:05:45.869126Z","signature_b64":"LOG0E9kUdGIXSt38+hSJARwIYmjuQnmNrAZ4XgXJYexbW/5feDwuAwWNDpGlUOtY6GDGhn6+VUqbqpaZ/rgVDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3e2e41542fe56236eab60973e50e61e660ae292fb8d90de81326d9c70056b187","last_reissued_at":"2026-07-04T17:05:45.868705Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:05:45.868705Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Freshly Formed Dust in the Cassiopeia A Supernova Remnant as Revealed by the Spitzer Space Telescope","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Tappe, H. Gomez, J. A. Ennis, J. D. Smith, J. Rho, L. Rudnick, T. DeLaney, T. Kozasa, W. T. Reach","submitted_at":"2007-09-18T16:49:13Z","abstract_excerpt":"We performed Spitzer Infrared Spectrograph mapping observations covering nearly the entire extent of the Cassiopeia A supernova remnant (SNR), producing mid-infrared (5.5-35 micron) spectra every 5-10\". Gas lines of Ar, Ne, O, Si, S and Fe, and dust continua were strong for most positions. We identify three distinct ejecta dust populations based on their continuum shapes. The dominant dust continuum shape exhibits a strong peak at 21 micron. A line-free map of 21 micron-peak dust made from the 19-23 micron range closely resembles the [Ar II], [O IV], and [Ne II] ejecta-line maps implying that "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0709.2880","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/0709.2880/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":"0709.2880","created_at":"2026-07-04T17:05:45.868760+00:00"},{"alias_kind":"arxiv_version","alias_value":"0709.2880v1","created_at":"2026-07-04T17:05:45.868760+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0709.2880","created_at":"2026-07-04T17:05:45.868760+00:00"},{"alias_kind":"pith_short_12","alias_value":"HYXECVBP4VRD","created_at":"2026-07-04T17:05:45.868760+00:00"},{"alias_kind":"pith_short_16","alias_value":"HYXECVBP4VRDN2VW","created_at":"2026-07-04T17:05:45.868760+00:00"},{"alias_kind":"pith_short_8","alias_value":"HYXECVBP","created_at":"2026-07-04T17:05:45.868760+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/HYXECVBP4VRDN2VWBFZ6KDTB4Z","json":"https://pith.science/pith/HYXECVBP4VRDN2VWBFZ6KDTB4Z.json","graph_json":"https://pith.science/api/pith-number/HYXECVBP4VRDN2VWBFZ6KDTB4Z/graph.json","events_json":"https://pith.science/api/pith-number/HYXECVBP4VRDN2VWBFZ6KDTB4Z/events.json","paper":"https://pith.science/paper/HYXECVBP"},"agent_actions":{"view_html":"https://pith.science/pith/HYXECVBP4VRDN2VWBFZ6KDTB4Z","download_json":"https://pith.science/pith/HYXECVBP4VRDN2VWBFZ6KDTB4Z.json","view_paper":"https://pith.science/paper/HYXECVBP","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0709.2880&json=true","fetch_graph":"https://pith.science/api/pith-number/HYXECVBP4VRDN2VWBFZ6KDTB4Z/graph.json","fetch_events":"https://pith.science/api/pith-number/HYXECVBP4VRDN2VWBFZ6KDTB4Z/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/HYXECVBP4VRDN2VWBFZ6KDTB4Z/action/timestamp_anchor","attest_storage":"https://pith.science/pith/HYXECVBP4VRDN2VWBFZ6KDTB4Z/action/storage_attestation","attest_author":"https://pith.science/pith/HYXECVBP4VRDN2VWBFZ6KDTB4Z/action/author_attestation","sign_citation":"https://pith.science/pith/HYXECVBP4VRDN2VWBFZ6KDTB4Z/action/citation_signature","submit_replication":"https://pith.science/pith/HYXECVBP4VRDN2VWBFZ6KDTB4Z/action/replication_record"}},"created_at":"2026-07-04T17:05:45.868760+00:00","updated_at":"2026-07-04T17:05:45.868760+00:00"}