{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:6GCEWH4HMIG363S3A7HR3F35WV","short_pith_number":"pith:6GCEWH4H","schema_version":"1.0","canonical_sha256":"f1844b1f87620dbf6e5b07cf1d977db5618284c428a8bd91304da51d48c6988e","source":{"kind":"arxiv","id":"1811.07944","version":2},"attestation_state":"computed","paper":{"title":"Close-up view of an ongoing merger between the NGC 4839 group and the Coma cluster - a post-merger scenario","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.HE","authors_text":"A. Sheardown, C. Jones, C. Zhang, E. Churazov, E. Roediger, K. Dolag, N. Lyskova, W. Forman","submitted_at":"2018-11-19T19:28:59Z","abstract_excerpt":"We study a merger of the NGC 4839 group with the Coma cluster using X-ray observations from the XMM-Newton and Chandra telescopes. X-ray data show two prominent features: (i) a long (~600 kpc in projection) and bent tail of cool gas trailing (towards south-west) the optical center of NGC 4839, and ii) a \"sheath\" region of enhanced X-ray surface brightness enveloping the group, which is due to hotter gas. While at first glance the X-ray images suggest that we are witnessing the first infall of NGC 4839 into the Coma cluster core, we argue that a post-merger scenario provides a better explanatio"},"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":"1811.07944","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-11-19T19:28:59Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"cda6ec13a20b972d6e428e1b84f254178021b558107dce83e2fc89bb15c28c20","abstract_canon_sha256":"579a0c0ea1080d45e565ce6cbeefe0ce5d025822d3bc876a8a48250aa444c16c"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:51:52.295674Z","signature_b64":"BIFijXRdD855XPo42/x3YIMVcAyqDVC+rrxtbhbhrKbQM8jCIHjXH1/IddJEghXtE+pP3jz8tZzeA8ZvsIfjBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f1844b1f87620dbf6e5b07cf1d977db5618284c428a8bd91304da51d48c6988e","last_reissued_at":"2026-05-17T23:51:52.294992Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:51:52.294992Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Close-up view of an ongoing merger between the NGC 4839 group and the Coma cluster - a post-merger scenario","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.HE","authors_text":"A. Sheardown, C. Jones, C. Zhang, E. Churazov, E. Roediger, K. Dolag, N. Lyskova, W. Forman","submitted_at":"2018-11-19T19:28:59Z","abstract_excerpt":"We study a merger of the NGC 4839 group with the Coma cluster using X-ray observations from the XMM-Newton and Chandra telescopes. X-ray data show two prominent features: (i) a long (~600 kpc in projection) and bent tail of cool gas trailing (towards south-west) the optical center of NGC 4839, and ii) a \"sheath\" region of enhanced X-ray surface brightness enveloping the group, which is due to hotter gas. While at first glance the X-ray images suggest that we are witnessing the first infall of NGC 4839 into the Coma cluster core, we argue that a post-merger scenario provides a better explanatio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.07944","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":"1811.07944","created_at":"2026-05-17T23:51:52.295095+00:00"},{"alias_kind":"arxiv_version","alias_value":"1811.07944v2","created_at":"2026-05-17T23:51:52.295095+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.07944","created_at":"2026-05-17T23:51:52.295095+00:00"},{"alias_kind":"pith_short_12","alias_value":"6GCEWH4HMIG3","created_at":"2026-05-18T12:32:08.215937+00:00"},{"alias_kind":"pith_short_16","alias_value":"6GCEWH4HMIG363S3","created_at":"2026-05-18T12:32:08.215937+00:00"},{"alias_kind":"pith_short_8","alias_value":"6GCEWH4H","created_at":"2026-05-18T12:32:08.215937+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/6GCEWH4HMIG363S3A7HR3F35WV","json":"https://pith.science/pith/6GCEWH4HMIG363S3A7HR3F35WV.json","graph_json":"https://pith.science/api/pith-number/6GCEWH4HMIG363S3A7HR3F35WV/graph.json","events_json":"https://pith.science/api/pith-number/6GCEWH4HMIG363S3A7HR3F35WV/events.json","paper":"https://pith.science/paper/6GCEWH4H"},"agent_actions":{"view_html":"https://pith.science/pith/6GCEWH4HMIG363S3A7HR3F35WV","download_json":"https://pith.science/pith/6GCEWH4HMIG363S3A7HR3F35WV.json","view_paper":"https://pith.science/paper/6GCEWH4H","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1811.07944&json=true","fetch_graph":"https://pith.science/api/pith-number/6GCEWH4HMIG363S3A7HR3F35WV/graph.json","fetch_events":"https://pith.science/api/pith-number/6GCEWH4HMIG363S3A7HR3F35WV/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/6GCEWH4HMIG363S3A7HR3F35WV/action/timestamp_anchor","attest_storage":"https://pith.science/pith/6GCEWH4HMIG363S3A7HR3F35WV/action/storage_attestation","attest_author":"https://pith.science/pith/6GCEWH4HMIG363S3A7HR3F35WV/action/author_attestation","sign_citation":"https://pith.science/pith/6GCEWH4HMIG363S3A7HR3F35WV/action/citation_signature","submit_replication":"https://pith.science/pith/6GCEWH4HMIG363S3A7HR3F35WV/action/replication_record"}},"created_at":"2026-05-17T23:51:52.295095+00:00","updated_at":"2026-05-17T23:51:52.295095+00:00"}