{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:BRJ3FC6SWTFDS74C2PTFSW6LSC","short_pith_number":"pith:BRJ3FC6S","schema_version":"1.0","canonical_sha256":"0c53b28bd2b4ca397f82d3e6595bcb90b54daecd4ce9ba62b9086eb7093ea597","source":{"kind":"arxiv","id":"2112.09056","version":1},"attestation_state":"computed","paper":{"title":"Accretion processes in the galaxy cluster Hydra A/Abell 780","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"C. Innocentin, M. Girardi, M. Nonino, S. De Grandi, W. Boschin","submitted_at":"2021-12-16T17:52:06Z","abstract_excerpt":"Clusters of galaxies evolve and accrete mass, mostly from small galaxy systems. Our aim is to study the velocity field of the galaxy cluster Abell 780, which is known for the powerful radio source Hydra A at its center and where a spectacular X-ray tail associated with the galaxy LEDA 87445 has been discovered. Our analysis is based on the new spectroscopic data for hundreds of galaxies obtained with the Italian Telescopio Nazionale {\\em Galileo} and the Very Large Telescope. We have constructed a redshift catalog of 623 galaxies and selected a sample of 126 cluster members. We analyze the int"},"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":"2112.09056","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-12-16T17:52:06Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"d3d76d21b1819e807cfc810c70752d524dde36dc7b38dee067065cebfc66e0f5","abstract_canon_sha256":"042e579b8938d0089e9ff430d87d89e97d7212169a3146624847d7005c408969"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:04:28.129266Z","signature_b64":"U152RugbnjYawoU/MmUGGK4N8N0TV4QeyjwtvYX9Hr/xoi6HSkGAnKTnz54i4vnlsoiZe/+CfeRxEBVGHsJ+Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0c53b28bd2b4ca397f82d3e6595bcb90b54daecd4ce9ba62b9086eb7093ea597","last_reissued_at":"2026-07-05T04:04:28.128914Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:04:28.128914Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Accretion processes in the galaxy cluster Hydra A/Abell 780","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"C. Innocentin, M. Girardi, M. Nonino, S. De Grandi, W. Boschin","submitted_at":"2021-12-16T17:52:06Z","abstract_excerpt":"Clusters of galaxies evolve and accrete mass, mostly from small galaxy systems. Our aim is to study the velocity field of the galaxy cluster Abell 780, which is known for the powerful radio source Hydra A at its center and where a spectacular X-ray tail associated with the galaxy LEDA 87445 has been discovered. Our analysis is based on the new spectroscopic data for hundreds of galaxies obtained with the Italian Telescopio Nazionale {\\em Galileo} and the Very Large Telescope. We have constructed a redshift catalog of 623 galaxies and selected a sample of 126 cluster members. We analyze the int"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.09056","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/2112.09056/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":"2112.09056","created_at":"2026-07-05T04:04:28.128971+00:00"},{"alias_kind":"arxiv_version","alias_value":"2112.09056v1","created_at":"2026-07-05T04:04:28.128971+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.09056","created_at":"2026-07-05T04:04:28.128971+00:00"},{"alias_kind":"pith_short_12","alias_value":"BRJ3FC6SWTFD","created_at":"2026-07-05T04:04:28.128971+00:00"},{"alias_kind":"pith_short_16","alias_value":"BRJ3FC6SWTFDS74C","created_at":"2026-07-05T04:04:28.128971+00:00"},{"alias_kind":"pith_short_8","alias_value":"BRJ3FC6S","created_at":"2026-07-05T04:04:28.128971+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/BRJ3FC6SWTFDS74C2PTFSW6LSC","json":"https://pith.science/pith/BRJ3FC6SWTFDS74C2PTFSW6LSC.json","graph_json":"https://pith.science/api/pith-number/BRJ3FC6SWTFDS74C2PTFSW6LSC/graph.json","events_json":"https://pith.science/api/pith-number/BRJ3FC6SWTFDS74C2PTFSW6LSC/events.json","paper":"https://pith.science/paper/BRJ3FC6S"},"agent_actions":{"view_html":"https://pith.science/pith/BRJ3FC6SWTFDS74C2PTFSW6LSC","download_json":"https://pith.science/pith/BRJ3FC6SWTFDS74C2PTFSW6LSC.json","view_paper":"https://pith.science/paper/BRJ3FC6S","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2112.09056&json=true","fetch_graph":"https://pith.science/api/pith-number/BRJ3FC6SWTFDS74C2PTFSW6LSC/graph.json","fetch_events":"https://pith.science/api/pith-number/BRJ3FC6SWTFDS74C2PTFSW6LSC/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/BRJ3FC6SWTFDS74C2PTFSW6LSC/action/timestamp_anchor","attest_storage":"https://pith.science/pith/BRJ3FC6SWTFDS74C2PTFSW6LSC/action/storage_attestation","attest_author":"https://pith.science/pith/BRJ3FC6SWTFDS74C2PTFSW6LSC/action/author_attestation","sign_citation":"https://pith.science/pith/BRJ3FC6SWTFDS74C2PTFSW6LSC/action/citation_signature","submit_replication":"https://pith.science/pith/BRJ3FC6SWTFDS74C2PTFSW6LSC/action/replication_record"}},"created_at":"2026-07-05T04:04:28.128971+00:00","updated_at":"2026-07-05T04:04:28.128971+00:00"}