{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:Z57IBA5UPZGLJYOM6RM5F2HXYS","short_pith_number":"pith:Z57IBA5U","canonical_record":{"source":{"id":"2010.15412","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-10-29T08:23:51Z","cross_cats_sorted":[],"title_canon_sha256":"2b604d7f768086e8ad17da46ceb1a67e0d7e3d0dd70b12fc2535393b083d21a8","abstract_canon_sha256":"0a6ec5c3c089d10aba9e45ed7817c9bf08140d88e5d011188fb93620a1f0d6ca"},"schema_version":"1.0"},"canonical_sha256":"cf7e8083b47e4cb4e1ccf459d2e8f7c4a642a1e6974fad56f001de6b7c499010","source":{"kind":"arxiv","id":"2010.15412","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2010.15412","created_at":"2026-07-05T02:03:51Z"},{"alias_kind":"arxiv_version","alias_value":"2010.15412v1","created_at":"2026-07-05T02:03:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2010.15412","created_at":"2026-07-05T02:03:51Z"},{"alias_kind":"pith_short_12","alias_value":"Z57IBA5UPZGL","created_at":"2026-07-05T02:03:51Z"},{"alias_kind":"pith_short_16","alias_value":"Z57IBA5UPZGLJYOM","created_at":"2026-07-05T02:03:51Z"},{"alias_kind":"pith_short_8","alias_value":"Z57IBA5U","created_at":"2026-07-05T02:03:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:Z57IBA5UPZGLJYOM6RM5F2HXYS","target":"record","payload":{"canonical_record":{"source":{"id":"2010.15412","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-10-29T08:23:51Z","cross_cats_sorted":[],"title_canon_sha256":"2b604d7f768086e8ad17da46ceb1a67e0d7e3d0dd70b12fc2535393b083d21a8","abstract_canon_sha256":"0a6ec5c3c089d10aba9e45ed7817c9bf08140d88e5d011188fb93620a1f0d6ca"},"schema_version":"1.0"},"canonical_sha256":"cf7e8083b47e4cb4e1ccf459d2e8f7c4a642a1e6974fad56f001de6b7c499010","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:03:51.847321Z","signature_b64":"LPICtGQKlAI8pSPoJkBCJj7IftBi8wlPRueHfE48jIuN1OY9OMKyUH5WoJ7zr7hQiFQ2RLpKdeRjj9MygTzcCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cf7e8083b47e4cb4e1ccf459d2e8f7c4a642a1e6974fad56f001de6b7c499010","last_reissued_at":"2026-07-05T02:03:51.846837Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:03:51.846837Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2010.15412","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":"2026-07-05T02:03:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hABeyWbRrcI/fffrE9sW8te9YEUzCxgxrEuXdEBaUlFJtdb0oPdnJxd84iM5263txENnDD9QsUsOdh+gJvs0Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T15:24:34.327219Z"},"content_sha256":"ea6ade06f0c379183443dc1a827e5c3bb00b02a623d96db66a2a9b8eeb73046d","schema_version":"1.0","event_id":"sha256:ea6ade06f0c379183443dc1a827e5c3bb00b02a623d96db66a2a9b8eeb73046d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:Z57IBA5UPZGLJYOM6RM5F2HXYS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Can supernova shells feed supermassive black holes in galactic nuclei?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Jan Palous, Mark R. Morris, Richrd Wunsch, Sona Ehlerova","submitted_at":"2020-10-29T08:23:51Z","abstract_excerpt":"We simulate shells created by supernovae expanding into the interstellar medium (ISM) of the nuclear region of a galaxy, and analyze how the shell evolution is influenced by the supernova (SN) position relative to the galactic center, by the interstellar matter (ISM) density, and by the combined gravitational pull of the nuclear star cluster (NSC) and supermassive black hole (SMBH).We adopted simplified hydrodynamical simulations using the infinitesimally thin layer approximation in 3D (code RING) and determined whether and where the shell expansion may bring new gas into the inner parsec arou"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2010.15412","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/2010.15412/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":"2026-07-05T02:03:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"I/89AIPhdgA+VntTzKGxCh20y+X+Ces4lcy7eYw2t3Xabj9ES/WRXcMKK9o7qdec1UKd1xP96MP7SbFsgKGyCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T15:24:34.327612Z"},"content_sha256":"80f2cca7cf08322720a1a606ff75357d8aae9e92f6e90c512ae602d26b8ad150","schema_version":"1.0","event_id":"sha256:80f2cca7cf08322720a1a606ff75357d8aae9e92f6e90c512ae602d26b8ad150"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Z57IBA5UPZGLJYOM6RM5F2HXYS/bundle.json","state_url":"https://pith.science/pith/Z57IBA5UPZGLJYOM6RM5F2HXYS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Z57IBA5UPZGLJYOM6RM5F2HXYS/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":"2026-08-20T15:24:34Z","links":{"resolver":"https://pith.science/pith/Z57IBA5UPZGLJYOM6RM5F2HXYS","bundle":"https://pith.science/pith/Z57IBA5UPZGLJYOM6RM5F2HXYS/bundle.json","state":"https://pith.science/pith/Z57IBA5UPZGLJYOM6RM5F2HXYS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Z57IBA5UPZGLJYOM6RM5F2HXYS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:Z57IBA5UPZGLJYOM6RM5F2HXYS","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":"0a6ec5c3c089d10aba9e45ed7817c9bf08140d88e5d011188fb93620a1f0d6ca","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-10-29T08:23:51Z","title_canon_sha256":"2b604d7f768086e8ad17da46ceb1a67e0d7e3d0dd70b12fc2535393b083d21a8"},"schema_version":"1.0","source":{"id":"2010.15412","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2010.15412","created_at":"2026-07-05T02:03:51Z"},{"alias_kind":"arxiv_version","alias_value":"2010.15412v1","created_at":"2026-07-05T02:03:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2010.15412","created_at":"2026-07-05T02:03:51Z"},{"alias_kind":"pith_short_12","alias_value":"Z57IBA5UPZGL","created_at":"2026-07-05T02:03:51Z"},{"alias_kind":"pith_short_16","alias_value":"Z57IBA5UPZGLJYOM","created_at":"2026-07-05T02:03:51Z"},{"alias_kind":"pith_short_8","alias_value":"Z57IBA5U","created_at":"2026-07-05T02:03:51Z"}],"graph_snapshots":[{"event_id":"sha256:80f2cca7cf08322720a1a606ff75357d8aae9e92f6e90c512ae602d26b8ad150","target":"graph","created_at":"2026-07-05T02:03:51Z","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/2010.15412/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We simulate shells created by supernovae expanding into the interstellar medium (ISM) of the nuclear region of a galaxy, and analyze how the shell evolution is influenced by the supernova (SN) position relative to the galactic center, by the interstellar matter (ISM) density, and by the combined gravitational pull of the nuclear star cluster (NSC) and supermassive black hole (SMBH).We adopted simplified hydrodynamical simulations using the infinitesimally thin layer approximation in 3D (code RING) and determined whether and where the shell expansion may bring new gas into the inner parsec arou","authors_text":"Jan Palous, Mark R. Morris, Richrd Wunsch, Sona Ehlerova","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-10-29T08:23:51Z","title":"Can supernova shells feed supermassive black holes in galactic nuclei?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2010.15412","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:ea6ade06f0c379183443dc1a827e5c3bb00b02a623d96db66a2a9b8eeb73046d","target":"record","created_at":"2026-07-05T02:03:51Z","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":"0a6ec5c3c089d10aba9e45ed7817c9bf08140d88e5d011188fb93620a1f0d6ca","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-10-29T08:23:51Z","title_canon_sha256":"2b604d7f768086e8ad17da46ceb1a67e0d7e3d0dd70b12fc2535393b083d21a8"},"schema_version":"1.0","source":{"id":"2010.15412","kind":"arxiv","version":1}},"canonical_sha256":"cf7e8083b47e4cb4e1ccf459d2e8f7c4a642a1e6974fad56f001de6b7c499010","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cf7e8083b47e4cb4e1ccf459d2e8f7c4a642a1e6974fad56f001de6b7c499010","first_computed_at":"2026-07-05T02:03:51.846837Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:03:51.846837Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LPICtGQKlAI8pSPoJkBCJj7IftBi8wlPRueHfE48jIuN1OY9OMKyUH5WoJ7zr7hQiFQ2RLpKdeRjj9MygTzcCg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:03:51.847321Z","signed_message":"canonical_sha256_bytes"},"source_id":"2010.15412","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ea6ade06f0c379183443dc1a827e5c3bb00b02a623d96db66a2a9b8eeb73046d","sha256:80f2cca7cf08322720a1a606ff75357d8aae9e92f6e90c512ae602d26b8ad150"],"state_sha256":"b3b3d0bad5fef33f244a8566f9a189b1ea15b734298753ef3a53a9bdfcb0c848"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vuX6YJFejdZyMHFzRzBYW7l9p01p9P1uxckYHvAI7N0dhN3zVuwTEfrC60CCPMsj12awaaeOQYImSM4tSvE1Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-20T15:24:34.330055Z","bundle_sha256":"7933675989b2c7c28c74cfec7c477e0a7fa28c197e5cec516f910c53eb60d231"}}