{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:E5OSA2WGUB67WNEHUPDRLFWGWH","short_pith_number":"pith:E5OSA2WG","canonical_record":{"source":{"id":"1310.0022","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-09-30T20:00:17Z","cross_cats_sorted":[],"title_canon_sha256":"1d112a913ceea76d018655b9605fe1a7302e7284987544bb5e1e707de9246ebd","abstract_canon_sha256":"79d37d60710e5bd5379423d52f3969475a41fbdf7237251cb693f8e8aaf356ad"},"schema_version":"1.0"},"canonical_sha256":"275d206ac6a07dfb3487a3c71596c6b1e956f188c2bea42c263abbea691050dd","source":{"kind":"arxiv","id":"1310.0022","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.0022","created_at":"2026-05-18T02:53:08Z"},{"alias_kind":"arxiv_version","alias_value":"1310.0022v2","created_at":"2026-05-18T02:53:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.0022","created_at":"2026-05-18T02:53:08Z"},{"alias_kind":"pith_short_12","alias_value":"E5OSA2WGUB67","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"E5OSA2WGUB67WNEH","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"E5OSA2WG","created_at":"2026-05-18T12:27:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:E5OSA2WGUB67WNEHUPDRLFWGWH","target":"record","payload":{"canonical_record":{"source":{"id":"1310.0022","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-09-30T20:00:17Z","cross_cats_sorted":[],"title_canon_sha256":"1d112a913ceea76d018655b9605fe1a7302e7284987544bb5e1e707de9246ebd","abstract_canon_sha256":"79d37d60710e5bd5379423d52f3969475a41fbdf7237251cb693f8e8aaf356ad"},"schema_version":"1.0"},"canonical_sha256":"275d206ac6a07dfb3487a3c71596c6b1e956f188c2bea42c263abbea691050dd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:53:08.050499Z","signature_b64":"ZFgb9omFrMlb3uwI/RkPPoPu1BwPkTq+Rqs1L+5mlRWBfcVF4mPRyXZhm3NyRhLtCRWXhEKa1RV55qaLKsXRBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"275d206ac6a07dfb3487a3c71596c6b1e956f188c2bea42c263abbea691050dd","last_reissued_at":"2026-05-18T02:53:08.049933Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:53:08.049933Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1310.0022","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:53:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+lSh58dBpa654STA8MzzgmFVhRBKP+MVt4RH1Cc+uajVODnGWOt3vk1rgjyrTs+jkyXxNGbNx0YpLyOJWR6RBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T08:35:14.247844Z"},"content_sha256":"9ff8ee2c80a9b2adc096ea5e82aed327ff0c8b9c2224c6964686666084c4fdfa","schema_version":"1.0","event_id":"sha256:9ff8ee2c80a9b2adc096ea5e82aed327ff0c8b9c2224c6964686666084c4fdfa"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:E5OSA2WGUB67WNEHUPDRLFWGWH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Tracing mass and light in the Universe: where is the dark matter?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Andrea Kulier, Neta A. Bahcall","submitted_at":"2013-09-30T20:00:17Z","abstract_excerpt":"How is mass distributed in the Universe? How does it compare with the distribution of light and stars? We address these questions by examining the distribution of mass, determined from weak lensing observations, and starlight, around $>10^5$ SDSS MaxBCG groups and clusters as a function of environment and scale, from deep inside clusters to large cosmic scales of $22 h^{-1}$ Mpc. The observed cumulative mass-to-light profile, $M/L (< r)$, rises on small scales, reflecting the increasing $M/L$ of the central bright galaxy of the cluster, then flattens to a nearly constant ratio on scales above "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.0022","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:53:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1ozKSfVpNwsJnG9IKxMcPbXRU8TiyUchQE3gSwhk0UPnldNFczTa7Zq4B0ZFLH7tI/dPt/RqicLUqr6qwPbjAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T08:35:14.248565Z"},"content_sha256":"394130702e2c0b6b8ece03d0c95e7d233d9aa1ce9ff3cb11c544cdefe48ea8cb","schema_version":"1.0","event_id":"sha256:394130702e2c0b6b8ece03d0c95e7d233d9aa1ce9ff3cb11c544cdefe48ea8cb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/E5OSA2WGUB67WNEHUPDRLFWGWH/bundle.json","state_url":"https://pith.science/pith/E5OSA2WGUB67WNEHUPDRLFWGWH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/E5OSA2WGUB67WNEHUPDRLFWGWH/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-09T08:35:14Z","links":{"resolver":"https://pith.science/pith/E5OSA2WGUB67WNEHUPDRLFWGWH","bundle":"https://pith.science/pith/E5OSA2WGUB67WNEHUPDRLFWGWH/bundle.json","state":"https://pith.science/pith/E5OSA2WGUB67WNEHUPDRLFWGWH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/E5OSA2WGUB67WNEHUPDRLFWGWH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:E5OSA2WGUB67WNEHUPDRLFWGWH","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"79d37d60710e5bd5379423d52f3969475a41fbdf7237251cb693f8e8aaf356ad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-09-30T20:00:17Z","title_canon_sha256":"1d112a913ceea76d018655b9605fe1a7302e7284987544bb5e1e707de9246ebd"},"schema_version":"1.0","source":{"id":"1310.0022","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.0022","created_at":"2026-05-18T02:53:08Z"},{"alias_kind":"arxiv_version","alias_value":"1310.0022v2","created_at":"2026-05-18T02:53:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.0022","created_at":"2026-05-18T02:53:08Z"},{"alias_kind":"pith_short_12","alias_value":"E5OSA2WGUB67","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"E5OSA2WGUB67WNEH","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"E5OSA2WG","created_at":"2026-05-18T12:27:43Z"}],"graph_snapshots":[{"event_id":"sha256:394130702e2c0b6b8ece03d0c95e7d233d9aa1ce9ff3cb11c544cdefe48ea8cb","target":"graph","created_at":"2026-05-18T02:53:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"How is mass distributed in the Universe? How does it compare with the distribution of light and stars? We address these questions by examining the distribution of mass, determined from weak lensing observations, and starlight, around $>10^5$ SDSS MaxBCG groups and clusters as a function of environment and scale, from deep inside clusters to large cosmic scales of $22 h^{-1}$ Mpc. The observed cumulative mass-to-light profile, $M/L (< r)$, rises on small scales, reflecting the increasing $M/L$ of the central bright galaxy of the cluster, then flattens to a nearly constant ratio on scales above ","authors_text":"Andrea Kulier, Neta A. Bahcall","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-09-30T20:00:17Z","title":"Tracing mass and light in the Universe: where is the dark matter?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.0022","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:9ff8ee2c80a9b2adc096ea5e82aed327ff0c8b9c2224c6964686666084c4fdfa","target":"record","created_at":"2026-05-18T02:53:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"79d37d60710e5bd5379423d52f3969475a41fbdf7237251cb693f8e8aaf356ad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-09-30T20:00:17Z","title_canon_sha256":"1d112a913ceea76d018655b9605fe1a7302e7284987544bb5e1e707de9246ebd"},"schema_version":"1.0","source":{"id":"1310.0022","kind":"arxiv","version":2}},"canonical_sha256":"275d206ac6a07dfb3487a3c71596c6b1e956f188c2bea42c263abbea691050dd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"275d206ac6a07dfb3487a3c71596c6b1e956f188c2bea42c263abbea691050dd","first_computed_at":"2026-05-18T02:53:08.049933Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:53:08.049933Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZFgb9omFrMlb3uwI/RkPPoPu1BwPkTq+Rqs1L+5mlRWBfcVF4mPRyXZhm3NyRhLtCRWXhEKa1RV55qaLKsXRBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:53:08.050499Z","signed_message":"canonical_sha256_bytes"},"source_id":"1310.0022","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9ff8ee2c80a9b2adc096ea5e82aed327ff0c8b9c2224c6964686666084c4fdfa","sha256:394130702e2c0b6b8ece03d0c95e7d233d9aa1ce9ff3cb11c544cdefe48ea8cb"],"state_sha256":"4b636ce3e03861a0b0c3711a93d43aaeb26389d99d0108a42d3ea5cbb6d2f943"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F1aeX7dE3pNPq/H3x1pnHF3h3aRc1512J0RdEEvSC1eMHv+oSTdEUXhzQwVLLWCViYhrnTriS4mW5ZxBe+E7BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T08:35:14.252140Z","bundle_sha256":"8dcd793b058b6b5cb8347cccc2117249d6516a86a9b907748841fe5bee57182b"}}