{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:5PJ4FEMP5LHKKCNQOUZRRUC3FX","short_pith_number":"pith:5PJ4FEMP","canonical_record":{"source":{"id":"0903.1092","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-03-05T20:10:29Z","cross_cats_sorted":[],"title_canon_sha256":"6294a8a345ab3a5a142f58d5f237a3b2d60c559f360cec8fa71181d93168e04e","abstract_canon_sha256":"6422c25c45833bc49d8496a0c59a4da8040c2711046b8a1704937e8b6e1d0538"},"schema_version":"1.0"},"canonical_sha256":"ebd3c2918feacea509b0753318d05b2de6e8cf0fbf5f63093bfed19121719c27","source":{"kind":"arxiv","id":"0903.1092","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0903.1092","created_at":"2026-05-18T02:14:37Z"},{"alias_kind":"arxiv_version","alias_value":"0903.1092v1","created_at":"2026-05-18T02:14:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0903.1092","created_at":"2026-05-18T02:14:37Z"},{"alias_kind":"pith_short_12","alias_value":"5PJ4FEMP5LHK","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"5PJ4FEMP5LHKKCNQ","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"5PJ4FEMP","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:5PJ4FEMP5LHKKCNQOUZRRUC3FX","target":"record","payload":{"canonical_record":{"source":{"id":"0903.1092","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-03-05T20:10:29Z","cross_cats_sorted":[],"title_canon_sha256":"6294a8a345ab3a5a142f58d5f237a3b2d60c559f360cec8fa71181d93168e04e","abstract_canon_sha256":"6422c25c45833bc49d8496a0c59a4da8040c2711046b8a1704937e8b6e1d0538"},"schema_version":"1.0"},"canonical_sha256":"ebd3c2918feacea509b0753318d05b2de6e8cf0fbf5f63093bfed19121719c27","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:14:37.015838Z","signature_b64":"spaiZzGTaoimLYRfXHOS0T2YVj0h8mi4lRJpbzA5V8xCZRu5NX4QdtgbJYJpZrugr7Xo9iyRAyAbLCcHqWcaBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ebd3c2918feacea509b0753318d05b2de6e8cf0fbf5f63093bfed19121719c27","last_reissued_at":"2026-05-18T02:14:37.015087Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:14:37.015087Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0903.1092","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":"2026-05-18T02:14:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WrBeyF781P49/X9RXK/Rx6g1+0Qa5Sg0FMO2dMfzd8HglC3WxSWUzCxScMviiZV9Jh2B3gAO1r2/4EthtdJtDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T04:31:48.600791Z"},"content_sha256":"a73c66940e5b356020a50605fa11c9efd3b86e2e97c9687280b54fe7e8887c77","schema_version":"1.0","event_id":"sha256:a73c66940e5b356020a50605fa11c9efd3b86e2e97c9687280b54fe7e8887c77"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:5PJ4FEMP5LHKKCNQOUZRRUC3FX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The anatomy of the NGC 5044 group -- II. Stellar populations and star-formation histories","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Duncan A. Forbes, Jesper Rasmussen, J. Trevor Mendel, Robert N. Proctor, Sarah Brough","submitted_at":"2009-03-05T20:10:29Z","abstract_excerpt":"The distribution of galaxy properties in groups and clusters holds important information on galaxy evolution and growth of structure in the Universe. While clusters have received appreciable attention in this regard, the role of groups as fundamental to formation of the present day galaxy population has remained relatively unaddressed. Here we present stellar ages, metallicities and alpha-element abundances derived using Lick indices for 67 spectroscopically confirmed members of the NGC 5044 galaxy group with the aim of shedding light on galaxy evolution in the context of the group environment"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0903.1092","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":"2026-05-18T02:14:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Msn7MxKZ5XvFwS+EqO9SGsJPlTPrnrvl5f+uwdQgyjgszxUId9rQwjyitjW/gNTS0o3Z83Vw06sYmZXzL+daDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T04:31:48.601514Z"},"content_sha256":"6dea55952ef9f8d202bb2f7a778cfb432e72b4a0dd3aebe5cd693219eb7341c9","schema_version":"1.0","event_id":"sha256:6dea55952ef9f8d202bb2f7a778cfb432e72b4a0dd3aebe5cd693219eb7341c9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5PJ4FEMP5LHKKCNQOUZRRUC3FX/bundle.json","state_url":"https://pith.science/pith/5PJ4FEMP5LHKKCNQOUZRRUC3FX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5PJ4FEMP5LHKKCNQOUZRRUC3FX/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":"2026-05-26T04:31:48Z","links":{"resolver":"https://pith.science/pith/5PJ4FEMP5LHKKCNQOUZRRUC3FX","bundle":"https://pith.science/pith/5PJ4FEMP5LHKKCNQOUZRRUC3FX/bundle.json","state":"https://pith.science/pith/5PJ4FEMP5LHKKCNQOUZRRUC3FX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5PJ4FEMP5LHKKCNQOUZRRUC3FX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:5PJ4FEMP5LHKKCNQOUZRRUC3FX","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":"6422c25c45833bc49d8496a0c59a4da8040c2711046b8a1704937e8b6e1d0538","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-03-05T20:10:29Z","title_canon_sha256":"6294a8a345ab3a5a142f58d5f237a3b2d60c559f360cec8fa71181d93168e04e"},"schema_version":"1.0","source":{"id":"0903.1092","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0903.1092","created_at":"2026-05-18T02:14:37Z"},{"alias_kind":"arxiv_version","alias_value":"0903.1092v1","created_at":"2026-05-18T02:14:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0903.1092","created_at":"2026-05-18T02:14:37Z"},{"alias_kind":"pith_short_12","alias_value":"5PJ4FEMP5LHK","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"5PJ4FEMP5LHKKCNQ","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"5PJ4FEMP","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:6dea55952ef9f8d202bb2f7a778cfb432e72b4a0dd3aebe5cd693219eb7341c9","target":"graph","created_at":"2026-05-18T02:14:37Z","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":"The distribution of galaxy properties in groups and clusters holds important information on galaxy evolution and growth of structure in the Universe. While clusters have received appreciable attention in this regard, the role of groups as fundamental to formation of the present day galaxy population has remained relatively unaddressed. Here we present stellar ages, metallicities and alpha-element abundances derived using Lick indices for 67 spectroscopically confirmed members of the NGC 5044 galaxy group with the aim of shedding light on galaxy evolution in the context of the group environment","authors_text":"Duncan A. Forbes, Jesper Rasmussen, J. Trevor Mendel, Robert N. Proctor, Sarah Brough","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-03-05T20:10:29Z","title":"The anatomy of the NGC 5044 group -- II. Stellar populations and star-formation histories"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0903.1092","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:a73c66940e5b356020a50605fa11c9efd3b86e2e97c9687280b54fe7e8887c77","target":"record","created_at":"2026-05-18T02:14:37Z","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":"6422c25c45833bc49d8496a0c59a4da8040c2711046b8a1704937e8b6e1d0538","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-03-05T20:10:29Z","title_canon_sha256":"6294a8a345ab3a5a142f58d5f237a3b2d60c559f360cec8fa71181d93168e04e"},"schema_version":"1.0","source":{"id":"0903.1092","kind":"arxiv","version":1}},"canonical_sha256":"ebd3c2918feacea509b0753318d05b2de6e8cf0fbf5f63093bfed19121719c27","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ebd3c2918feacea509b0753318d05b2de6e8cf0fbf5f63093bfed19121719c27","first_computed_at":"2026-05-18T02:14:37.015087Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:14:37.015087Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"spaiZzGTaoimLYRfXHOS0T2YVj0h8mi4lRJpbzA5V8xCZRu5NX4QdtgbJYJpZrugr7Xo9iyRAyAbLCcHqWcaBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:14:37.015838Z","signed_message":"canonical_sha256_bytes"},"source_id":"0903.1092","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a73c66940e5b356020a50605fa11c9efd3b86e2e97c9687280b54fe7e8887c77","sha256:6dea55952ef9f8d202bb2f7a778cfb432e72b4a0dd3aebe5cd693219eb7341c9"],"state_sha256":"8c39651d5945d07867198e395ab4dc7de1750888cf72d165db43ff17d7fe22c3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OkptYVw6G9uhgcNy/6l2PdlYAH6sQGGJolHwPycTT+gxp0D/qP9iD4OOSyEAIH/7KvX/bJweGXYh5s55x0ehCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T04:31:48.605288Z","bundle_sha256":"f0d189ed597485aa0df965e471a7c1b37c4e8a0ae84eacb04dfae4154fafb39a"}}