{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:3T7BZ4G7T2QV437CPYSMHWTIYO","short_pith_number":"pith:3T7BZ4G7","canonical_record":{"source":{"id":"1302.5420","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-02-21T21:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"c0d2324562ff740708d8c403b56965edb2022bbb681a89498a21d76016870ecd","abstract_canon_sha256":"cac4a2004ab05982cbbb28316cd0e7830aa7c4f41a4f269d4ccc344a0920eefc"},"schema_version":"1.0"},"canonical_sha256":"dcfe1cf0df9ea15e6fe27e24c3da68c3968bc2a932d4d5d5fddb258732853d45","source":{"kind":"arxiv","id":"1302.5420","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.5420","created_at":"2026-05-18T01:51:34Z"},{"alias_kind":"arxiv_version","alias_value":"1302.5420v1","created_at":"2026-05-18T01:51:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.5420","created_at":"2026-05-18T01:51:34Z"},{"alias_kind":"pith_short_12","alias_value":"3T7BZ4G7T2QV","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"3T7BZ4G7T2QV437C","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"3T7BZ4G7","created_at":"2026-05-18T12:27:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:3T7BZ4G7T2QV437CPYSMHWTIYO","target":"record","payload":{"canonical_record":{"source":{"id":"1302.5420","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-02-21T21:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"c0d2324562ff740708d8c403b56965edb2022bbb681a89498a21d76016870ecd","abstract_canon_sha256":"cac4a2004ab05982cbbb28316cd0e7830aa7c4f41a4f269d4ccc344a0920eefc"},"schema_version":"1.0"},"canonical_sha256":"dcfe1cf0df9ea15e6fe27e24c3da68c3968bc2a932d4d5d5fddb258732853d45","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:51:34.335415Z","signature_b64":"hJS+lYOswWAH4/vc+qgD/pZ9cYljoUCEUDf5aXehjxyz9rwPfwk3K01TNxRB0Vi/b1eXmZom4GpiSavVnnQhAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dcfe1cf0df9ea15e6fe27e24c3da68c3968bc2a932d4d5d5fddb258732853d45","last_reissued_at":"2026-05-18T01:51:34.334976Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:51:34.334976Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1302.5420","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":"2026-05-18T01:51:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+00aSZQzJAIDK9rxX2J8Luwms+VcJz2ZRU084wB1Y6NNumsgc/ljpqPWAXgiqKr5LxXqttYO50B9UMgUxYwKCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T22:39:02.255556Z"},"content_sha256":"711b00e6cc276546f729294c706812b25e11c1140d1d79730130119f2f56540d","schema_version":"1.0","event_id":"sha256:711b00e6cc276546f729294c706812b25e11c1140d1d79730130119f2f56540d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:3T7BZ4G7T2QV437CPYSMHWTIYO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Comparative Study of AGN Feedback Algorithms","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"James Wurster, Robert J. Thacker","submitted_at":"2013-02-21T21:00:02Z","abstract_excerpt":"Modelling AGN feedback in numerical simulations is both technically and theoretically challenging, with numerous approaches having been published in the literature. We present a study of five distinct approaches to modelling AGN feedback within gravitohydrodynamic simulations of major mergers of Milky Way-sized galaxies. To constrain differences to only be between AGN feedback models, all simulations start from the same initial conditions and use the same star formation algorithm. Most AGN feedback algorithms have five key aspects: black hole accretion rate, energy feedback rate and method, pa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.5420","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":"2026-05-18T01:51:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9Dbsh6foyGfauXyXiITkg7Mq3pOw9CNYIV9/7qbcl1SJXbqI/z0ts+O2sRoR0wxMutcO6nP4oMltZrO/tvxDAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T22:39:02.256191Z"},"content_sha256":"b158556028c8f49d11658ebc528e399c3829d07eac0dbb709861aa5a71ac6dc8","schema_version":"1.0","event_id":"sha256:b158556028c8f49d11658ebc528e399c3829d07eac0dbb709861aa5a71ac6dc8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3T7BZ4G7T2QV437CPYSMHWTIYO/bundle.json","state_url":"https://pith.science/pith/3T7BZ4G7T2QV437CPYSMHWTIYO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3T7BZ4G7T2QV437CPYSMHWTIYO/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":"2026-05-31T22:39:02Z","links":{"resolver":"https://pith.science/pith/3T7BZ4G7T2QV437CPYSMHWTIYO","bundle":"https://pith.science/pith/3T7BZ4G7T2QV437CPYSMHWTIYO/bundle.json","state":"https://pith.science/pith/3T7BZ4G7T2QV437CPYSMHWTIYO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3T7BZ4G7T2QV437CPYSMHWTIYO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:3T7BZ4G7T2QV437CPYSMHWTIYO","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":"cac4a2004ab05982cbbb28316cd0e7830aa7c4f41a4f269d4ccc344a0920eefc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-02-21T21:00:02Z","title_canon_sha256":"c0d2324562ff740708d8c403b56965edb2022bbb681a89498a21d76016870ecd"},"schema_version":"1.0","source":{"id":"1302.5420","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.5420","created_at":"2026-05-18T01:51:34Z"},{"alias_kind":"arxiv_version","alias_value":"1302.5420v1","created_at":"2026-05-18T01:51:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.5420","created_at":"2026-05-18T01:51:34Z"},{"alias_kind":"pith_short_12","alias_value":"3T7BZ4G7T2QV","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"3T7BZ4G7T2QV437C","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"3T7BZ4G7","created_at":"2026-05-18T12:27:32Z"}],"graph_snapshots":[{"event_id":"sha256:b158556028c8f49d11658ebc528e399c3829d07eac0dbb709861aa5a71ac6dc8","target":"graph","created_at":"2026-05-18T01:51:34Z","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":"Modelling AGN feedback in numerical simulations is both technically and theoretically challenging, with numerous approaches having been published in the literature. We present a study of five distinct approaches to modelling AGN feedback within gravitohydrodynamic simulations of major mergers of Milky Way-sized galaxies. To constrain differences to only be between AGN feedback models, all simulations start from the same initial conditions and use the same star formation algorithm. Most AGN feedback algorithms have five key aspects: black hole accretion rate, energy feedback rate and method, pa","authors_text":"James Wurster, Robert J. Thacker","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-02-21T21:00:02Z","title":"A Comparative Study of AGN Feedback Algorithms"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.5420","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":"sha256:711b00e6cc276546f729294c706812b25e11c1140d1d79730130119f2f56540d","target":"record","created_at":"2026-05-18T01:51:34Z","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":"cac4a2004ab05982cbbb28316cd0e7830aa7c4f41a4f269d4ccc344a0920eefc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-02-21T21:00:02Z","title_canon_sha256":"c0d2324562ff740708d8c403b56965edb2022bbb681a89498a21d76016870ecd"},"schema_version":"1.0","source":{"id":"1302.5420","kind":"arxiv","version":1}},"canonical_sha256":"dcfe1cf0df9ea15e6fe27e24c3da68c3968bc2a932d4d5d5fddb258732853d45","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dcfe1cf0df9ea15e6fe27e24c3da68c3968bc2a932d4d5d5fddb258732853d45","first_computed_at":"2026-05-18T01:51:34.334976Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:51:34.334976Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hJS+lYOswWAH4/vc+qgD/pZ9cYljoUCEUDf5aXehjxyz9rwPfwk3K01TNxRB0Vi/b1eXmZom4GpiSavVnnQhAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:51:34.335415Z","signed_message":"canonical_sha256_bytes"},"source_id":"1302.5420","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:711b00e6cc276546f729294c706812b25e11c1140d1d79730130119f2f56540d","sha256:b158556028c8f49d11658ebc528e399c3829d07eac0dbb709861aa5a71ac6dc8"],"state_sha256":"ccd271792c7e9bd80ab87101d9a30e2ab2b665efefbfe10b527b8556c30aff06"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DBB23+qNNQKwQqdTJ+LxvcwwLzKa+d/gVbl7JQYZ6BXiFY4DhHvvv7uh6kUZ19gQeyVaNDsUXfy2mV3SLDFeCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T22:39:02.259287Z","bundle_sha256":"072c711e0f21e3f02726e2963053c969e17def71757c14115d760aaeb906403a"}}