{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:7CJTOHLMBJN7ZV6RJ36LO2UBYZ","short_pith_number":"pith:7CJTOHLM","canonical_record":{"source":{"id":"1604.05315","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-04-18T20:00:06Z","cross_cats_sorted":[],"title_canon_sha256":"468de8ffa8eabb669f2529cec86f079b3c90a3ded759bc333396460c47823d51","abstract_canon_sha256":"036513b06448a07e4042abeb0ef57c88765b02a625fc04d2431020fb65bbc54a"},"schema_version":"1.0"},"canonical_sha256":"f893371d6c0a5bfcd7d14efcb76a81c64bfcfde0ab5624d205d0c918cf20dc66","source":{"kind":"arxiv","id":"1604.05315","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.05315","created_at":"2026-05-18T01:11:48Z"},{"alias_kind":"arxiv_version","alias_value":"1604.05315v1","created_at":"2026-05-18T01:11:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.05315","created_at":"2026-05-18T01:11:48Z"},{"alias_kind":"pith_short_12","alias_value":"7CJTOHLMBJN7","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"7CJTOHLMBJN7ZV6R","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"7CJTOHLM","created_at":"2026-05-18T12:30:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:7CJTOHLMBJN7ZV6RJ36LO2UBYZ","target":"record","payload":{"canonical_record":{"source":{"id":"1604.05315","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-04-18T20:00:06Z","cross_cats_sorted":[],"title_canon_sha256":"468de8ffa8eabb669f2529cec86f079b3c90a3ded759bc333396460c47823d51","abstract_canon_sha256":"036513b06448a07e4042abeb0ef57c88765b02a625fc04d2431020fb65bbc54a"},"schema_version":"1.0"},"canonical_sha256":"f893371d6c0a5bfcd7d14efcb76a81c64bfcfde0ab5624d205d0c918cf20dc66","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:11:48.135828Z","signature_b64":"hNGkMkTppKQL8H2dg6SUOL3uNwFpUjkvQ/Q+INy+O2/kd2pnAwA9wBkbe9AGt7a1j+l7qnLR7KBwdQrTcU2sBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f893371d6c0a5bfcd7d14efcb76a81c64bfcfde0ab5624d205d0c918cf20dc66","last_reissued_at":"2026-05-18T01:11:48.135365Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:11:48.135365Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1604.05315","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":"2026-05-18T01:11:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"e4vTpI7NyBUsJaG7AQF1xbGnk7+JEnJ+jqVkNgIgsQ6mh65xq0oc1MIVmXujHmfTR70yupTUj3PpmTWlMTi6Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T06:10:37.451620Z"},"content_sha256":"221815f9003b1efa6f41bbc2f7ad5214f6251612709529af0ad59dd9c2ab2ca6","schema_version":"1.0","event_id":"sha256:221815f9003b1efa6f41bbc2f7ad5214f6251612709529af0ad59dd9c2ab2ca6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:7CJTOHLMBJN7ZV6RJ36LO2UBYZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Evolution of galaxy groups in the Illustris simulation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Ali A. Dariush, Habib G. Khosroshahi, Mojtaba Raouf","submitted_at":"2016-04-18T20:00:06Z","abstract_excerpt":"We present the first study of evolution of galaxy groups in the Illustris simulation. We focus on dynamically relaxed and unrelaxed galaxy groups representing dynamically evolved and evolving galaxy systems, respectively. The evolutionary state of a group is probed from its luminosity gap and separation between the brightest group galaxy and the center of mass of the group members. We find that the Illustris simulation, over-produces large luminosity gap galaxy systems, known as fossil systems, in comparison to observations and the probed semi-analytical predictions. However, this simulation i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.05315","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":"2026-05-18T01:11:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KEDi/YWsH0sQYR4LWexQ2pH/FemTaFQa3te1YSNYWEGDqHVL5Ym9LAFFgLhB5hsmZUd8nZNwh+usSDfiHTz8Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T06:10:37.452285Z"},"content_sha256":"545668d446e1ef7a8d129b80a3964a91d4aa9748e666fdbba654acc658a72ab5","schema_version":"1.0","event_id":"sha256:545668d446e1ef7a8d129b80a3964a91d4aa9748e666fdbba654acc658a72ab5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7CJTOHLMBJN7ZV6RJ36LO2UBYZ/bundle.json","state_url":"https://pith.science/pith/7CJTOHLMBJN7ZV6RJ36LO2UBYZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7CJTOHLMBJN7ZV6RJ36LO2UBYZ/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":"2026-06-07T06:10:37Z","links":{"resolver":"https://pith.science/pith/7CJTOHLMBJN7ZV6RJ36LO2UBYZ","bundle":"https://pith.science/pith/7CJTOHLMBJN7ZV6RJ36LO2UBYZ/bundle.json","state":"https://pith.science/pith/7CJTOHLMBJN7ZV6RJ36LO2UBYZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7CJTOHLMBJN7ZV6RJ36LO2UBYZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:7CJTOHLMBJN7ZV6RJ36LO2UBYZ","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":"036513b06448a07e4042abeb0ef57c88765b02a625fc04d2431020fb65bbc54a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-04-18T20:00:06Z","title_canon_sha256":"468de8ffa8eabb669f2529cec86f079b3c90a3ded759bc333396460c47823d51"},"schema_version":"1.0","source":{"id":"1604.05315","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.05315","created_at":"2026-05-18T01:11:48Z"},{"alias_kind":"arxiv_version","alias_value":"1604.05315v1","created_at":"2026-05-18T01:11:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.05315","created_at":"2026-05-18T01:11:48Z"},{"alias_kind":"pith_short_12","alias_value":"7CJTOHLMBJN7","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"7CJTOHLMBJN7ZV6R","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"7CJTOHLM","created_at":"2026-05-18T12:30:04Z"}],"graph_snapshots":[{"event_id":"sha256:545668d446e1ef7a8d129b80a3964a91d4aa9748e666fdbba654acc658a72ab5","target":"graph","created_at":"2026-05-18T01:11:48Z","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":"We present the first study of evolution of galaxy groups in the Illustris simulation. We focus on dynamically relaxed and unrelaxed galaxy groups representing dynamically evolved and evolving galaxy systems, respectively. The evolutionary state of a group is probed from its luminosity gap and separation between the brightest group galaxy and the center of mass of the group members. We find that the Illustris simulation, over-produces large luminosity gap galaxy systems, known as fossil systems, in comparison to observations and the probed semi-analytical predictions. However, this simulation i","authors_text":"Ali A. Dariush, Habib G. Khosroshahi, Mojtaba Raouf","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-04-18T20:00:06Z","title":"Evolution of galaxy groups in the Illustris simulation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.05315","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":"sha256:221815f9003b1efa6f41bbc2f7ad5214f6251612709529af0ad59dd9c2ab2ca6","target":"record","created_at":"2026-05-18T01:11:48Z","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":"036513b06448a07e4042abeb0ef57c88765b02a625fc04d2431020fb65bbc54a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-04-18T20:00:06Z","title_canon_sha256":"468de8ffa8eabb669f2529cec86f079b3c90a3ded759bc333396460c47823d51"},"schema_version":"1.0","source":{"id":"1604.05315","kind":"arxiv","version":1}},"canonical_sha256":"f893371d6c0a5bfcd7d14efcb76a81c64bfcfde0ab5624d205d0c918cf20dc66","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f893371d6c0a5bfcd7d14efcb76a81c64bfcfde0ab5624d205d0c918cf20dc66","first_computed_at":"2026-05-18T01:11:48.135365Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:48.135365Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hNGkMkTppKQL8H2dg6SUOL3uNwFpUjkvQ/Q+INy+O2/kd2pnAwA9wBkbe9AGt7a1j+l7qnLR7KBwdQrTcU2sBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:48.135828Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.05315","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:221815f9003b1efa6f41bbc2f7ad5214f6251612709529af0ad59dd9c2ab2ca6","sha256:545668d446e1ef7a8d129b80a3964a91d4aa9748e666fdbba654acc658a72ab5"],"state_sha256":"f07d5a1d5289e2de218e699c80f45eb7c38a78fe802091adc1f23d7f1290e47b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NmrZpileLvmW9V8GapDcxKrqmqWCg10/B9rXrU481f0ElgnVQne53JrDpcIkiT7gb4MoEZIGpr+aCD4OUE8NAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T06:10:37.455730Z","bundle_sha256":"4c59905e390fffc2fff40d709926f4330e7cbd8aafd39768822a527f8c0467d8"}}