{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:WE4IA32IJ6Z53QSTQFNXRNTVNM","short_pith_number":"pith:WE4IA32I","canonical_record":{"source":{"id":"1311.4608","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-11-19T02:21:11Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"9243ddd461d5b7e9b976f4927c615ff07830c31c738eafb7a16b74ef72b080e4","abstract_canon_sha256":"6fe5d4c8644681ffa94efd9948870af92e65f20d66fdc206b70669ca983faf55"},"schema_version":"1.0"},"canonical_sha256":"b138806f484fb3ddc253815b78b6756b24ae2b1e4ad19b8079bee0a6a9167e6d","source":{"kind":"arxiv","id":"1311.4608","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.4608","created_at":"2026-05-18T01:46:23Z"},{"alias_kind":"arxiv_version","alias_value":"1311.4608v2","created_at":"2026-05-18T01:46:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.4608","created_at":"2026-05-18T01:46:23Z"},{"alias_kind":"pith_short_12","alias_value":"WE4IA32IJ6Z5","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_16","alias_value":"WE4IA32IJ6Z53QST","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_8","alias_value":"WE4IA32I","created_at":"2026-05-18T12:28:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:WE4IA32IJ6Z53QSTQFNXRNTVNM","target":"record","payload":{"canonical_record":{"source":{"id":"1311.4608","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-11-19T02:21:11Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"9243ddd461d5b7e9b976f4927c615ff07830c31c738eafb7a16b74ef72b080e4","abstract_canon_sha256":"6fe5d4c8644681ffa94efd9948870af92e65f20d66fdc206b70669ca983faf55"},"schema_version":"1.0"},"canonical_sha256":"b138806f484fb3ddc253815b78b6756b24ae2b1e4ad19b8079bee0a6a9167e6d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:46:23.293585Z","signature_b64":"/HIHbyCTzVry9NBB/FMb2q13NDZc3BKW3tMnSdrMHyiD+4vjKAXLz3gDZTT/7WpEa2uicm9ihgxpFBPIerxOAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b138806f484fb3ddc253815b78b6756b24ae2b1e4ad19b8079bee0a6a9167e6d","last_reissued_at":"2026-05-18T01:46:23.293174Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:46:23.293174Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1311.4608","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:46:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jYmtNsPj1gVUxCU41QKwLFP2mjUN8JegdJ0oSAo0eyELtvWAzjx7UhOB8Z2VoxkpPilvaWMqUJNmdXarbOPqCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T13:18:11.453452Z"},"content_sha256":"b00887bea8716e0a96dab665db45498bca39eae291aaa5f77918fe3537d2ec0e","schema_version":"1.0","event_id":"sha256:b00887bea8716e0a96dab665db45498bca39eae291aaa5f77918fe3537d2ec0e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:WE4IA32IJ6Z53QSTQFNXRNTVNM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Jumping the energetics queue: Modulation of pulsar signals by extraterrestrial civilizations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.IM","authors_text":"Andrew P. V. Siemion, Dan Werthimer, D. R. Lorimer, Jayanth Chennamangalam","submitted_at":"2013-11-19T02:21:11Z","abstract_excerpt":"It has been speculated that technological civilizations evolve along an energy consumption scale first formulated by Kardashev, ranging from human-like civilizations that consume energy at a rate of $\\sim 10^{19}$ erg s$^{-1}$ to hypothetical highly advanced civilizations that can consume $\\sim 10^{44}$ erg s$^{-1}$. Since the transmission power of a beacon a civilization can build depends on the energy it possesses, to make it bright enough to be seen across the Galaxy would require high technological advancement. In this paper, we discuss the possibility of a civilization using naturally-occ"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.4608","kind":"arxiv","version":2},"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":"2026-05-18T01:46:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QNsHnE4/54BNR39yKu4AK6ywwmI5YiwP0WvjbJKnXXkuoB+86TDXRfdJAQZbFmDkxAq1Uj9EfDvXt330EuyHBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T13:18:11.453824Z"},"content_sha256":"3a23146a6b7880ae7f3a7e932f469141de49f65820fb51d820344e0f032ef38f","schema_version":"1.0","event_id":"sha256:3a23146a6b7880ae7f3a7e932f469141de49f65820fb51d820344e0f032ef38f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WE4IA32IJ6Z53QSTQFNXRNTVNM/bundle.json","state_url":"https://pith.science/pith/WE4IA32IJ6Z53QSTQFNXRNTVNM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WE4IA32IJ6Z53QSTQFNXRNTVNM/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":"2026-05-26T13:18:11Z","links":{"resolver":"https://pith.science/pith/WE4IA32IJ6Z53QSTQFNXRNTVNM","bundle":"https://pith.science/pith/WE4IA32IJ6Z53QSTQFNXRNTVNM/bundle.json","state":"https://pith.science/pith/WE4IA32IJ6Z53QSTQFNXRNTVNM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WE4IA32IJ6Z53QSTQFNXRNTVNM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:WE4IA32IJ6Z53QSTQFNXRNTVNM","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":"6fe5d4c8644681ffa94efd9948870af92e65f20d66fdc206b70669ca983faf55","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-11-19T02:21:11Z","title_canon_sha256":"9243ddd461d5b7e9b976f4927c615ff07830c31c738eafb7a16b74ef72b080e4"},"schema_version":"1.0","source":{"id":"1311.4608","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.4608","created_at":"2026-05-18T01:46:23Z"},{"alias_kind":"arxiv_version","alias_value":"1311.4608v2","created_at":"2026-05-18T01:46:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.4608","created_at":"2026-05-18T01:46:23Z"},{"alias_kind":"pith_short_12","alias_value":"WE4IA32IJ6Z5","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_16","alias_value":"WE4IA32IJ6Z53QST","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_8","alias_value":"WE4IA32I","created_at":"2026-05-18T12:28:04Z"}],"graph_snapshots":[{"event_id":"sha256:3a23146a6b7880ae7f3a7e932f469141de49f65820fb51d820344e0f032ef38f","target":"graph","created_at":"2026-05-18T01:46:23Z","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":"It has been speculated that technological civilizations evolve along an energy consumption scale first formulated by Kardashev, ranging from human-like civilizations that consume energy at a rate of $\\sim 10^{19}$ erg s$^{-1}$ to hypothetical highly advanced civilizations that can consume $\\sim 10^{44}$ erg s$^{-1}$. Since the transmission power of a beacon a civilization can build depends on the energy it possesses, to make it bright enough to be seen across the Galaxy would require high technological advancement. In this paper, we discuss the possibility of a civilization using naturally-occ","authors_text":"Andrew P. V. Siemion, Dan Werthimer, D. R. Lorimer, Jayanth Chennamangalam","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-11-19T02:21:11Z","title":"Jumping the energetics queue: Modulation of pulsar signals by extraterrestrial civilizations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.4608","kind":"arxiv","version":2},"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:b00887bea8716e0a96dab665db45498bca39eae291aaa5f77918fe3537d2ec0e","target":"record","created_at":"2026-05-18T01:46:23Z","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":"6fe5d4c8644681ffa94efd9948870af92e65f20d66fdc206b70669ca983faf55","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-11-19T02:21:11Z","title_canon_sha256":"9243ddd461d5b7e9b976f4927c615ff07830c31c738eafb7a16b74ef72b080e4"},"schema_version":"1.0","source":{"id":"1311.4608","kind":"arxiv","version":2}},"canonical_sha256":"b138806f484fb3ddc253815b78b6756b24ae2b1e4ad19b8079bee0a6a9167e6d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b138806f484fb3ddc253815b78b6756b24ae2b1e4ad19b8079bee0a6a9167e6d","first_computed_at":"2026-05-18T01:46:23.293174Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:46:23.293174Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/HIHbyCTzVry9NBB/FMb2q13NDZc3BKW3tMnSdrMHyiD+4vjKAXLz3gDZTT/7WpEa2uicm9ihgxpFBPIerxOAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:46:23.293585Z","signed_message":"canonical_sha256_bytes"},"source_id":"1311.4608","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b00887bea8716e0a96dab665db45498bca39eae291aaa5f77918fe3537d2ec0e","sha256:3a23146a6b7880ae7f3a7e932f469141de49f65820fb51d820344e0f032ef38f"],"state_sha256":"6251be5ae786024594fe7534d8dbd1cc9ebb6c7f05f5a367fcb834f89091627e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P2EJMKLTy0lWe8QFoLazRUjlosWwPkZ24OG/yLIYG81nSiPvmL/bf7ZtquJpD9Lcalzox2f4mLsFcgHNqx7IAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T13:18:11.457255Z","bundle_sha256":"d8af4e27112615cc5427b2a65d6c94abb1bea2ee8a2128c62c94fda27679750c"}}