{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:OMABDLVVBLQUZWHGPQIQL4FNGM","short_pith_number":"pith:OMABDLVV","canonical_record":{"source":{"id":"1509.07506","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-09-24T20:05:01Z","cross_cats_sorted":[],"title_canon_sha256":"dc807c4b14695aa639f44ede500beb6d3f347fd97087ba9386e4c70b6eed3955","abstract_canon_sha256":"2e833f20996357ea0d4e542fc018c02f3a1cd29dc2732752c2fd9aac27b19193"},"schema_version":"1.0"},"canonical_sha256":"730011aeb50ae14cd8e67c1105f0ad33112dd2fe912cda1208937709aa4708cd","source":{"kind":"arxiv","id":"1509.07506","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.07506","created_at":"2026-05-18T01:12:07Z"},{"alias_kind":"arxiv_version","alias_value":"1509.07506v1","created_at":"2026-05-18T01:12:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.07506","created_at":"2026-05-18T01:12:07Z"},{"alias_kind":"pith_short_12","alias_value":"OMABDLVVBLQU","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_16","alias_value":"OMABDLVVBLQUZWHG","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_8","alias_value":"OMABDLVV","created_at":"2026-05-18T12:29:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:OMABDLVVBLQUZWHGPQIQL4FNGM","target":"record","payload":{"canonical_record":{"source":{"id":"1509.07506","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-09-24T20:05:01Z","cross_cats_sorted":[],"title_canon_sha256":"dc807c4b14695aa639f44ede500beb6d3f347fd97087ba9386e4c70b6eed3955","abstract_canon_sha256":"2e833f20996357ea0d4e542fc018c02f3a1cd29dc2732752c2fd9aac27b19193"},"schema_version":"1.0"},"canonical_sha256":"730011aeb50ae14cd8e67c1105f0ad33112dd2fe912cda1208937709aa4708cd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:12:07.942852Z","signature_b64":"o8w/EvlBfoSI8VIQAcLFl2rCrrKQxkoqV3FdLQytOKa2ONXFnZ35MCgM7nK68cKrLbNEIzuCVGUC2PDber0gDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"730011aeb50ae14cd8e67c1105f0ad33112dd2fe912cda1208937709aa4708cd","last_reissued_at":"2026-05-18T01:12:07.942450Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:12:07.942450Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.07506","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:12:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7eWxtSH2gPADbbiyt1b/ko4ZP+8jH86ZXGHUJp6mFujy7s6grH4hggUviBIA/BO8maFtxWUKOTS4fq9e/tomAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T23:40:22.985189Z"},"content_sha256":"2838b84b3b63a225ab0c11b4009db2f49005c9f31b0623fda77b9fd215979033","schema_version":"1.0","event_id":"sha256:2838b84b3b63a225ab0c11b4009db2f49005c9f31b0623fda77b9fd215979033"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:OMABDLVVBLQUZWHGPQIQL4FNGM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Density Jumps Near the Virial Radius of Galaxy Clusters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Abraham Loeb, Anna Patej","submitted_at":"2015-09-24T20:05:01Z","abstract_excerpt":"Recent simulations have indicated that the dark matter halos of galaxy clusters should feature steep density jumps near the virial radius. Since the member galaxies are expected to follow similar collisionless dynamics as the dark matter, the galaxy density profile should show such a feature as well. We examine the potential of current datasets to test this prediction by selecting cluster members for a sample of 56 low-redshift (0.1<z<0.3) galaxy clusters, constructing their projected number density profiles, and fitting them with two profiles, one with a steep density jump and one without. Ad"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.07506","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:12:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"t9y7mfNUpYHKq2OfClR5kvMHKVuXcJ5ytpDI03fvKVQGuj9bOp3vtdORZ5riLMtQCAeJu3DbWaFcN/+YrNv1AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T23:40:22.985587Z"},"content_sha256":"621ad4843c275c5321870d83adc7d337643e8fa12035e9105b8c73fe1e41974c","schema_version":"1.0","event_id":"sha256:621ad4843c275c5321870d83adc7d337643e8fa12035e9105b8c73fe1e41974c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OMABDLVVBLQUZWHGPQIQL4FNGM/bundle.json","state_url":"https://pith.science/pith/OMABDLVVBLQUZWHGPQIQL4FNGM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OMABDLVVBLQUZWHGPQIQL4FNGM/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":"2026-05-29T23:40:22Z","links":{"resolver":"https://pith.science/pith/OMABDLVVBLQUZWHGPQIQL4FNGM","bundle":"https://pith.science/pith/OMABDLVVBLQUZWHGPQIQL4FNGM/bundle.json","state":"https://pith.science/pith/OMABDLVVBLQUZWHGPQIQL4FNGM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OMABDLVVBLQUZWHGPQIQL4FNGM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:OMABDLVVBLQUZWHGPQIQL4FNGM","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":"2e833f20996357ea0d4e542fc018c02f3a1cd29dc2732752c2fd9aac27b19193","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-09-24T20:05:01Z","title_canon_sha256":"dc807c4b14695aa639f44ede500beb6d3f347fd97087ba9386e4c70b6eed3955"},"schema_version":"1.0","source":{"id":"1509.07506","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.07506","created_at":"2026-05-18T01:12:07Z"},{"alias_kind":"arxiv_version","alias_value":"1509.07506v1","created_at":"2026-05-18T01:12:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.07506","created_at":"2026-05-18T01:12:07Z"},{"alias_kind":"pith_short_12","alias_value":"OMABDLVVBLQU","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_16","alias_value":"OMABDLVVBLQUZWHG","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_8","alias_value":"OMABDLVV","created_at":"2026-05-18T12:29:34Z"}],"graph_snapshots":[{"event_id":"sha256:621ad4843c275c5321870d83adc7d337643e8fa12035e9105b8c73fe1e41974c","target":"graph","created_at":"2026-05-18T01:12:07Z","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":"Recent simulations have indicated that the dark matter halos of galaxy clusters should feature steep density jumps near the virial radius. Since the member galaxies are expected to follow similar collisionless dynamics as the dark matter, the galaxy density profile should show such a feature as well. We examine the potential of current datasets to test this prediction by selecting cluster members for a sample of 56 low-redshift (0.1<z<0.3) galaxy clusters, constructing their projected number density profiles, and fitting them with two profiles, one with a steep density jump and one without. Ad","authors_text":"Abraham Loeb, Anna Patej","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-09-24T20:05:01Z","title":"Density Jumps Near the Virial Radius of Galaxy Clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.07506","kind":"arxiv","version":1},"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":"sha256:2838b84b3b63a225ab0c11b4009db2f49005c9f31b0623fda77b9fd215979033","target":"record","created_at":"2026-05-18T01:12:07Z","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":"2e833f20996357ea0d4e542fc018c02f3a1cd29dc2732752c2fd9aac27b19193","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-09-24T20:05:01Z","title_canon_sha256":"dc807c4b14695aa639f44ede500beb6d3f347fd97087ba9386e4c70b6eed3955"},"schema_version":"1.0","source":{"id":"1509.07506","kind":"arxiv","version":1}},"canonical_sha256":"730011aeb50ae14cd8e67c1105f0ad33112dd2fe912cda1208937709aa4708cd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"730011aeb50ae14cd8e67c1105f0ad33112dd2fe912cda1208937709aa4708cd","first_computed_at":"2026-05-18T01:12:07.942450Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:12:07.942450Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"o8w/EvlBfoSI8VIQAcLFl2rCrrKQxkoqV3FdLQytOKa2ONXFnZ35MCgM7nK68cKrLbNEIzuCVGUC2PDber0gDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:12:07.942852Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.07506","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2838b84b3b63a225ab0c11b4009db2f49005c9f31b0623fda77b9fd215979033","sha256:621ad4843c275c5321870d83adc7d337643e8fa12035e9105b8c73fe1e41974c"],"state_sha256":"a0fde7766366eea110dacf4bdf51fe6cd32e30e004e9b759156e9bce1158f94c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3umMqB8Vm8V53MT1jDiUi8puyP5eINO/mKmrzfTjnqmy/keaCJsCeTD24W8PtcGuzezcDeLFVGqqXDpLx5viAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T23:40:22.988931Z","bundle_sha256":"0e8da62c963add8e04f35da5b9c0448b100a82a2f96930cecb78f96da9a58fdb"}}