{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2008:X5CN3RIH6LTIC72HDJOCVYQVLL","short_pith_number":"pith:X5CN3RIH","schema_version":"1.0","canonical_sha256":"bf44ddc507f2e6817f471a5c2ae2155ac4f09277984b5e7c12d9786ecf75d458","source":{"kind":"arxiv","id":"0806.0376","version":1},"attestation_state":"computed","paper":{"title":"RXJ1648.7+6109: Witnessing the Formation of a Massive Group/Poor Cluster and its Brightest Galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"J.S. Mulchaey, L.M. Lubin, T.E. Jeltema","submitted_at":"2008-06-02T20:00:36Z","abstract_excerpt":"Using deep Chandra and optical spectroscopic observations, we investigate an intriguing, young massive group, RXJ1648.7+6109, at z=0.376, and we combine these observations with previous measurements to fit the scaling relations of intermediate-redshift groups and poor clusters. RXJ1648 appears to be in an early stage of formation; while it follows X-ray scaling relations, its X-ray emission is highly elongated and it lacks a central, dominant BCG. Instead, RXJ1648 contains a central string of seven bright galaxies, which have a smaller velocity dispersion, are on average brighter, and have les"},"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":"0806.0376","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-06-02T20:00:36Z","cross_cats_sorted":[],"title_canon_sha256":"a60c67c220ebb3a7539c1393994c65ca448b1a29611fd8ee5ac7e77878b89e1c","abstract_canon_sha256":"97d4900a0c443a84d73176019acbdc1bd82e2e55df358fbfa793e3c68f7fd0fe"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:36:41.172220Z","signature_b64":"/y7IVXucwuN+XWzDKVp4fv0CpjaVwzB7cAf0gRJWhA6Qjm+myoHZUYgo5w9GotUam5ME2WHbGXJzZ5RMEJhnDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bf44ddc507f2e6817f471a5c2ae2155ac4f09277984b5e7c12d9786ecf75d458","last_reissued_at":"2026-05-18T04:36:41.171701Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:36:41.171701Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"RXJ1648.7+6109: Witnessing the Formation of a Massive Group/Poor Cluster and its Brightest Galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"J.S. Mulchaey, L.M. Lubin, T.E. Jeltema","submitted_at":"2008-06-02T20:00:36Z","abstract_excerpt":"Using deep Chandra and optical spectroscopic observations, we investigate an intriguing, young massive group, RXJ1648.7+6109, at z=0.376, and we combine these observations with previous measurements to fit the scaling relations of intermediate-redshift groups and poor clusters. RXJ1648 appears to be in an early stage of formation; while it follows X-ray scaling relations, its X-ray emission is highly elongated and it lacks a central, dominant BCG. Instead, RXJ1648 contains a central string of seven bright galaxies, which have a smaller velocity dispersion, are on average brighter, and have les"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0806.0376","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":""},"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":"0806.0376","created_at":"2026-05-18T04:36:41.171785+00:00"},{"alias_kind":"arxiv_version","alias_value":"0806.0376v1","created_at":"2026-05-18T04:36:41.171785+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0806.0376","created_at":"2026-05-18T04:36:41.171785+00:00"},{"alias_kind":"pith_short_12","alias_value":"X5CN3RIH6LTI","created_at":"2026-05-18T12:25:58.018023+00:00"},{"alias_kind":"pith_short_16","alias_value":"X5CN3RIH6LTIC72H","created_at":"2026-05-18T12:25:58.018023+00:00"},{"alias_kind":"pith_short_8","alias_value":"X5CN3RIH","created_at":"2026-05-18T12:25:58.018023+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/X5CN3RIH6LTIC72HDJOCVYQVLL","json":"https://pith.science/pith/X5CN3RIH6LTIC72HDJOCVYQVLL.json","graph_json":"https://pith.science/api/pith-number/X5CN3RIH6LTIC72HDJOCVYQVLL/graph.json","events_json":"https://pith.science/api/pith-number/X5CN3RIH6LTIC72HDJOCVYQVLL/events.json","paper":"https://pith.science/paper/X5CN3RIH"},"agent_actions":{"view_html":"https://pith.science/pith/X5CN3RIH6LTIC72HDJOCVYQVLL","download_json":"https://pith.science/pith/X5CN3RIH6LTIC72HDJOCVYQVLL.json","view_paper":"https://pith.science/paper/X5CN3RIH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0806.0376&json=true","fetch_graph":"https://pith.science/api/pith-number/X5CN3RIH6LTIC72HDJOCVYQVLL/graph.json","fetch_events":"https://pith.science/api/pith-number/X5CN3RIH6LTIC72HDJOCVYQVLL/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/X5CN3RIH6LTIC72HDJOCVYQVLL/action/timestamp_anchor","attest_storage":"https://pith.science/pith/X5CN3RIH6LTIC72HDJOCVYQVLL/action/storage_attestation","attest_author":"https://pith.science/pith/X5CN3RIH6LTIC72HDJOCVYQVLL/action/author_attestation","sign_citation":"https://pith.science/pith/X5CN3RIH6LTIC72HDJOCVYQVLL/action/citation_signature","submit_replication":"https://pith.science/pith/X5CN3RIH6LTIC72HDJOCVYQVLL/action/replication_record"}},"created_at":"2026-05-18T04:36:41.171785+00:00","updated_at":"2026-05-18T04:36:41.171785+00:00"}