{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:54QODXPOGP2THEN5SKQS3GDDN4","short_pith_number":"pith:54QODXPO","canonical_record":{"source":{"id":"0704.2541","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-04-19T14:21:14Z","cross_cats_sorted":[],"title_canon_sha256":"7b3ea1a318cd234ee7fd8036444683a0fc23904dfe2c64b5f62df1975966f9fc","abstract_canon_sha256":"e6e7ae0e67be1793b4e063132e1b7c9236446059b8bd4f7c017af49b777fce01"},"schema_version":"1.0"},"canonical_sha256":"ef20e1ddee33f53391bd92a12d98636f32ff87b28b3c62f7910a77abff4a2017","source":{"kind":"arxiv","id":"0704.2541","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0704.2541","created_at":"2026-05-18T02:16:31Z"},{"alias_kind":"arxiv_version","alias_value":"0704.2541v1","created_at":"2026-05-18T02:16:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0704.2541","created_at":"2026-05-18T02:16:31Z"},{"alias_kind":"pith_short_12","alias_value":"54QODXPOGP2T","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"54QODXPOGP2THEN5","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"54QODXPO","created_at":"2026-05-18T12:25:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:54QODXPOGP2THEN5SKQS3GDDN4","target":"record","payload":{"canonical_record":{"source":{"id":"0704.2541","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-04-19T14:21:14Z","cross_cats_sorted":[],"title_canon_sha256":"7b3ea1a318cd234ee7fd8036444683a0fc23904dfe2c64b5f62df1975966f9fc","abstract_canon_sha256":"e6e7ae0e67be1793b4e063132e1b7c9236446059b8bd4f7c017af49b777fce01"},"schema_version":"1.0"},"canonical_sha256":"ef20e1ddee33f53391bd92a12d98636f32ff87b28b3c62f7910a77abff4a2017","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:16:31.653795Z","signature_b64":"rgSn/HbPEDTcZcjLcQo6xcVlkY9FRtY8LqypGWsodFgaCLxhDjBPvMKYfvYuqPrj6riRF+uRNrWMsUq0rYN3DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ef20e1ddee33f53391bd92a12d98636f32ff87b28b3c62f7910a77abff4a2017","last_reissued_at":"2026-05-18T02:16:31.653292Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:16:31.653292Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0704.2541","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":"2026-05-18T02:16:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RcwYV/QL6Bi0wLCu/vrJRNFNNMvWZQR+L76xTIoZ4XTbym1ucq2MAoiYMlwmcfvMdtd/hUJ+ERdTKT0bTkI6Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T18:01:11.057352Z"},"content_sha256":"838d99e406c9633e74c92d64ba3c5aa0efdd9b159ef1c8af2fd7655997c62bf4","schema_version":"1.0","event_id":"sha256:838d99e406c9633e74c92d64ba3c5aa0efdd9b159ef1c8af2fd7655997c62bf4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:54QODXPOGP2THEN5SKQS3GDDN4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Gamma-ray probe of the QSO's obscured evolution","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Iyudin (SINP, Garching, G. Di Cocco (IASF/IANF-Bologna, Germany), Italy), J. Greiner (MPE, Moscow, Moscow State University, Russia), S. Larsson (Stockholm University, Stockholm, Sweden)","submitted_at":"2007-04-19T14:21:14Z","abstract_excerpt":"The idea that substantial absorption in AGN could be a definite characteristic of the early phases of QSO evolution was invoked to explain the submillimeter observations of X-ray absorbed AGN at z~1 to z~3, that have shown strong emission at 850 mkm. This strong emission is a signature of the copious star formation. In AGN evolution model, the main obscured growth phase of the QSO coincides with formation of the host galaxy spheroid, the completion of which indicates the beginning of the luminous, unobscured phase of the QSO's evolution. The verification of this model at redshifts up to z~6 ap"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0704.2541","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":"2026-05-18T02:16:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OZX6bqYwvtBqzUZBqC+s2FNehSE2Z0JsHukos6mPicy1K/BnMRD2fc0MSMAFIuMVIE3DgNtuU1NyC2oKG2oEBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T18:01:11.058043Z"},"content_sha256":"0c1c883b2678fea03a71aaf99fca7641c076e4a738b7d8e2c64803292099c930","schema_version":"1.0","event_id":"sha256:0c1c883b2678fea03a71aaf99fca7641c076e4a738b7d8e2c64803292099c930"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/54QODXPOGP2THEN5SKQS3GDDN4/bundle.json","state_url":"https://pith.science/pith/54QODXPOGP2THEN5SKQS3GDDN4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/54QODXPOGP2THEN5SKQS3GDDN4/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":"2026-05-25T18:01:11Z","links":{"resolver":"https://pith.science/pith/54QODXPOGP2THEN5SKQS3GDDN4","bundle":"https://pith.science/pith/54QODXPOGP2THEN5SKQS3GDDN4/bundle.json","state":"https://pith.science/pith/54QODXPOGP2THEN5SKQS3GDDN4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/54QODXPOGP2THEN5SKQS3GDDN4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:54QODXPOGP2THEN5SKQS3GDDN4","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":"e6e7ae0e67be1793b4e063132e1b7c9236446059b8bd4f7c017af49b777fce01","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-04-19T14:21:14Z","title_canon_sha256":"7b3ea1a318cd234ee7fd8036444683a0fc23904dfe2c64b5f62df1975966f9fc"},"schema_version":"1.0","source":{"id":"0704.2541","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0704.2541","created_at":"2026-05-18T02:16:31Z"},{"alias_kind":"arxiv_version","alias_value":"0704.2541v1","created_at":"2026-05-18T02:16:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0704.2541","created_at":"2026-05-18T02:16:31Z"},{"alias_kind":"pith_short_12","alias_value":"54QODXPOGP2T","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"54QODXPOGP2THEN5","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"54QODXPO","created_at":"2026-05-18T12:25:55Z"}],"graph_snapshots":[{"event_id":"sha256:0c1c883b2678fea03a71aaf99fca7641c076e4a738b7d8e2c64803292099c930","target":"graph","created_at":"2026-05-18T02:16:31Z","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 idea that substantial absorption in AGN could be a definite characteristic of the early phases of QSO evolution was invoked to explain the submillimeter observations of X-ray absorbed AGN at z~1 to z~3, that have shown strong emission at 850 mkm. This strong emission is a signature of the copious star formation. In AGN evolution model, the main obscured growth phase of the QSO coincides with formation of the host galaxy spheroid, the completion of which indicates the beginning of the luminous, unobscured phase of the QSO's evolution. The verification of this model at redshifts up to z~6 ap","authors_text":"A. Iyudin (SINP, Garching, G. Di Cocco (IASF/IANF-Bologna, Germany), Italy), J. Greiner (MPE, Moscow, Moscow State University, Russia), S. Larsson (Stockholm University, Stockholm, Sweden)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-04-19T14:21:14Z","title":"Gamma-ray probe of the QSO's obscured evolution"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0704.2541","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":"sha256:838d99e406c9633e74c92d64ba3c5aa0efdd9b159ef1c8af2fd7655997c62bf4","target":"record","created_at":"2026-05-18T02:16:31Z","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":"e6e7ae0e67be1793b4e063132e1b7c9236446059b8bd4f7c017af49b777fce01","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-04-19T14:21:14Z","title_canon_sha256":"7b3ea1a318cd234ee7fd8036444683a0fc23904dfe2c64b5f62df1975966f9fc"},"schema_version":"1.0","source":{"id":"0704.2541","kind":"arxiv","version":1}},"canonical_sha256":"ef20e1ddee33f53391bd92a12d98636f32ff87b28b3c62f7910a77abff4a2017","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ef20e1ddee33f53391bd92a12d98636f32ff87b28b3c62f7910a77abff4a2017","first_computed_at":"2026-05-18T02:16:31.653292Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:16:31.653292Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rgSn/HbPEDTcZcjLcQo6xcVlkY9FRtY8LqypGWsodFgaCLxhDjBPvMKYfvYuqPrj6riRF+uRNrWMsUq0rYN3DA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:16:31.653795Z","signed_message":"canonical_sha256_bytes"},"source_id":"0704.2541","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:838d99e406c9633e74c92d64ba3c5aa0efdd9b159ef1c8af2fd7655997c62bf4","sha256:0c1c883b2678fea03a71aaf99fca7641c076e4a738b7d8e2c64803292099c930"],"state_sha256":"89406727e15d3b231b1008e03c063731fa24d1b88eef95d83815c1ad62b8eeec"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7NxuuXU7kGFU+KuN7YW0e5apOBzOZRkd5PN4GNjZEMCXltyeoEgzrIN5Lh3vsVB4qNsNFVkYqkmtWE8SCPmpDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T18:01:11.061941Z","bundle_sha256":"9d294947bf75da5a734357e3842c4d10a49c50010fc60a1cab6c1810ec68a254"}}