{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:M2JT3VD3IHWD3322O6N3XRZ7AD","short_pith_number":"pith:M2JT3VD3","canonical_record":{"source":{"id":"0902.4857","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-02-27T16:06:28Z","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"title_canon_sha256":"baf0881ea07c585bb51f9bafa6d9d1b73822a164ba964aad86285ec1f33386d5","abstract_canon_sha256":"e509c47b244a62c16e9869ab1df06688bc642873a318baffef7133a38383316d"},"schema_version":"1.0"},"canonical_sha256":"66933dd47b41ec3def5a779bbbc73f00e943546b0c14a565293f1b0483eb4bb9","source":{"kind":"arxiv","id":"0902.4857","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0902.4857","created_at":"2026-07-04T15:38:51Z"},{"alias_kind":"arxiv_version","alias_value":"0902.4857v1","created_at":"2026-07-04T15:38:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0902.4857","created_at":"2026-07-04T15:38:51Z"},{"alias_kind":"pith_short_12","alias_value":"M2JT3VD3IHWD","created_at":"2026-07-04T15:38:51Z"},{"alias_kind":"pith_short_16","alias_value":"M2JT3VD3IHWD3322","created_at":"2026-07-04T15:38:51Z"},{"alias_kind":"pith_short_8","alias_value":"M2JT3VD3","created_at":"2026-07-04T15:38:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:M2JT3VD3IHWD3322O6N3XRZ7AD","target":"record","payload":{"canonical_record":{"source":{"id":"0902.4857","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-02-27T16:06:28Z","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"title_canon_sha256":"baf0881ea07c585bb51f9bafa6d9d1b73822a164ba964aad86285ec1f33386d5","abstract_canon_sha256":"e509c47b244a62c16e9869ab1df06688bc642873a318baffef7133a38383316d"},"schema_version":"1.0"},"canonical_sha256":"66933dd47b41ec3def5a779bbbc73f00e943546b0c14a565293f1b0483eb4bb9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:38:51.796391Z","signature_b64":"DmbTNWvyqAecWAQWmC1qsujbYbke+c/5LygsKDanVE0oAXRh3P3c8dBDIfzlCd1vuDjDyhMIIdQiTHVT5K0ZDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"66933dd47b41ec3def5a779bbbc73f00e943546b0c14a565293f1b0483eb4bb9","last_reissued_at":"2026-07-04T15:38:51.795533Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:38:51.795533Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0902.4857","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":"2026-07-04T15:38:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r6j3HUIAG1eAXaO+PKhabqSOxNwJyJMrT/JCrCZZZ1Y6e1LmtroIIvyDscTUqLnJOz4ruQB/D/F1unn3O63ABw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T22:37:12.393168Z"},"content_sha256":"4f9265a04c447faa3bcf8a3528dfd97c90a7133798ed532ea92c8056bdb1fc1d","schema_version":"1.0","event_id":"sha256:4f9265a04c447faa3bcf8a3528dfd97c90a7133798ed532ea92c8056bdb1fc1d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:M2JT3VD3IHWD3322O6N3XRZ7AD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Galaxy clusters and the cosmic cycle of baryons across cosmic times","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","astro-ph.HE"],"primary_cat":"astro-ph.CO","authors_text":"A. Bignamini, A. Evrard, A. Ptak, A. Vikhlinin, C. Jones, G. Pareschi, G. Tagliaferri, G. Voit, J. Santos, K. Flanagan, M. Donahue, M. Paolillo, M. Weisskopf, P. Rosati, P. Tozzi, R. Giacconi, R. Gilli, S. Borgani, S. Molendi, S. Murray, W. Forman","submitted_at":"2009-02-27T16:06:28Z","abstract_excerpt":"We discuss the central role played by the X-ray study of hot baryons within galaxy clusters to reconstruct the assembly of cosmic structures and to trace the past history of star formation and accretion onto supermassive Black Holes (BHs). We shortly review the progress in this field contributed by the current generation of X-ray telescopes. Then, we focus on the outstanding scientific questions that have been opened by observations carried out in the last years and that represent the legacy of Chandra and XMM: (a) When and how is entropy injected into the inter-galactic medium (IGM)? (b) What"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0902.4857","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0902.4857/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T15:38:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0lAu6QxQ0NAp3clkVjwL1I8KvpA/NjvQIJpwv91i+OKdBxbeca8Jxyc9MsgJlBZg2IInlG2Rh8UruFawr5B8AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T22:37:12.393779Z"},"content_sha256":"dbea13a68e6a04d41276ca8a5042350110729e8ea735780c4628e25a6bb961ca","schema_version":"1.0","event_id":"sha256:dbea13a68e6a04d41276ca8a5042350110729e8ea735780c4628e25a6bb961ca"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/M2JT3VD3IHWD3322O6N3XRZ7AD/bundle.json","state_url":"https://pith.science/pith/M2JT3VD3IHWD3322O6N3XRZ7AD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/M2JT3VD3IHWD3322O6N3XRZ7AD/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":"2026-07-31T22:37:12Z","links":{"resolver":"https://pith.science/pith/M2JT3VD3IHWD3322O6N3XRZ7AD","bundle":"https://pith.science/pith/M2JT3VD3IHWD3322O6N3XRZ7AD/bundle.json","state":"https://pith.science/pith/M2JT3VD3IHWD3322O6N3XRZ7AD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/M2JT3VD3IHWD3322O6N3XRZ7AD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:M2JT3VD3IHWD3322O6N3XRZ7AD","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":"e509c47b244a62c16e9869ab1df06688bc642873a318baffef7133a38383316d","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-02-27T16:06:28Z","title_canon_sha256":"baf0881ea07c585bb51f9bafa6d9d1b73822a164ba964aad86285ec1f33386d5"},"schema_version":"1.0","source":{"id":"0902.4857","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0902.4857","created_at":"2026-07-04T15:38:51Z"},{"alias_kind":"arxiv_version","alias_value":"0902.4857v1","created_at":"2026-07-04T15:38:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0902.4857","created_at":"2026-07-04T15:38:51Z"},{"alias_kind":"pith_short_12","alias_value":"M2JT3VD3IHWD","created_at":"2026-07-04T15:38:51Z"},{"alias_kind":"pith_short_16","alias_value":"M2JT3VD3IHWD3322","created_at":"2026-07-04T15:38:51Z"},{"alias_kind":"pith_short_8","alias_value":"M2JT3VD3","created_at":"2026-07-04T15:38:51Z"}],"graph_snapshots":[{"event_id":"sha256:dbea13a68e6a04d41276ca8a5042350110729e8ea735780c4628e25a6bb961ca","target":"graph","created_at":"2026-07-04T15:38:51Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0902.4857/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We discuss the central role played by the X-ray study of hot baryons within galaxy clusters to reconstruct the assembly of cosmic structures and to trace the past history of star formation and accretion onto supermassive Black Holes (BHs). We shortly review the progress in this field contributed by the current generation of X-ray telescopes. Then, we focus on the outstanding scientific questions that have been opened by observations carried out in the last years and that represent the legacy of Chandra and XMM: (a) When and how is entropy injected into the inter-galactic medium (IGM)? (b) What","authors_text":"A. Bignamini, A. Evrard, A. Ptak, A. Vikhlinin, C. Jones, G. Pareschi, G. Tagliaferri, G. Voit, J. Santos, K. Flanagan, M. Donahue, M. Paolillo, M. Weisskopf, P. Rosati, P. Tozzi, R. Giacconi, R. Gilli, S. Borgani, S. Molendi, S. Murray, W. Forman","cross_cats":["astro-ph.GA","astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-02-27T16:06:28Z","title":"Galaxy clusters and the cosmic cycle of baryons across cosmic times"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0902.4857","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":"sha256:4f9265a04c447faa3bcf8a3528dfd97c90a7133798ed532ea92c8056bdb1fc1d","target":"record","created_at":"2026-07-04T15:38:51Z","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":"e509c47b244a62c16e9869ab1df06688bc642873a318baffef7133a38383316d","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-02-27T16:06:28Z","title_canon_sha256":"baf0881ea07c585bb51f9bafa6d9d1b73822a164ba964aad86285ec1f33386d5"},"schema_version":"1.0","source":{"id":"0902.4857","kind":"arxiv","version":1}},"canonical_sha256":"66933dd47b41ec3def5a779bbbc73f00e943546b0c14a565293f1b0483eb4bb9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"66933dd47b41ec3def5a779bbbc73f00e943546b0c14a565293f1b0483eb4bb9","first_computed_at":"2026-07-04T15:38:51.795533Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:38:51.795533Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DmbTNWvyqAecWAQWmC1qsujbYbke+c/5LygsKDanVE0oAXRh3P3c8dBDIfzlCd1vuDjDyhMIIdQiTHVT5K0ZDQ==","signature_status":"signed_v1","signed_at":"2026-07-04T15:38:51.796391Z","signed_message":"canonical_sha256_bytes"},"source_id":"0902.4857","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4f9265a04c447faa3bcf8a3528dfd97c90a7133798ed532ea92c8056bdb1fc1d","sha256:dbea13a68e6a04d41276ca8a5042350110729e8ea735780c4628e25a6bb961ca"],"state_sha256":"34b38e07f9c30567ab8e30cdaac27b15512a7e92b662b94fd981ebadc47d9277"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hrGe0MNEpCSpKBxqpXmQVP4T63cCOrKXWsow+iw9CUK7QrVcqbfH2x6o5FoGd53DeN+nsMFWkrMsCCxIs+TgBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-31T22:37:12.398254Z","bundle_sha256":"ca0c3228286dfaf8521fc0d5ff53464e5ac8cc10e37061ffc9b12a7b5b78b5e3"}}