{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:KAPKDPTN5F442HYJMG3LPVVKSE","short_pith_number":"pith:KAPKDPTN","canonical_record":{"source":{"id":"1909.01043","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-09-03T10:25:31Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"d9da7715018af400fcb1ead9f8a63c7f85c6dae237c16ae2a4f9ee8aac6bfe91","abstract_canon_sha256":"8140d93030388255efbd1d2e28c686cfa0f46ece93f1fd9bc9229fbaf78fb976"},"schema_version":"1.0"},"canonical_sha256":"501ea1be6de979cd1f0961b6b7d6aa910481653dd8051340736e56c63cd82395","source":{"kind":"arxiv","id":"1909.01043","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.01043","created_at":"2026-07-05T00:01:15Z"},{"alias_kind":"arxiv_version","alias_value":"1909.01043v1","created_at":"2026-07-05T00:01:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.01043","created_at":"2026-07-05T00:01:15Z"},{"alias_kind":"pith_short_12","alias_value":"KAPKDPTN5F44","created_at":"2026-07-05T00:01:15Z"},{"alias_kind":"pith_short_16","alias_value":"KAPKDPTN5F442HYJ","created_at":"2026-07-05T00:01:15Z"},{"alias_kind":"pith_short_8","alias_value":"KAPKDPTN","created_at":"2026-07-05T00:01:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:KAPKDPTN5F442HYJMG3LPVVKSE","target":"record","payload":{"canonical_record":{"source":{"id":"1909.01043","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-09-03T10:25:31Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"d9da7715018af400fcb1ead9f8a63c7f85c6dae237c16ae2a4f9ee8aac6bfe91","abstract_canon_sha256":"8140d93030388255efbd1d2e28c686cfa0f46ece93f1fd9bc9229fbaf78fb976"},"schema_version":"1.0"},"canonical_sha256":"501ea1be6de979cd1f0961b6b7d6aa910481653dd8051340736e56c63cd82395","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:01:15.309177Z","signature_b64":"ZTiN+EPkd8jEm7UR/98kCg7iivO9s0nvfN5K+c/VmmU1zlFaSTxikS4CBKhFjYnA8DtbV7S3C1z9+o2lFIznAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"501ea1be6de979cd1f0961b6b7d6aa910481653dd8051340736e56c63cd82395","last_reissued_at":"2026-07-05T00:01:15.308759Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:01:15.308759Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1909.01043","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":"2026-07-05T00:01:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eFwmDlACmbs3cmi263rXd7h7Ol1/wnqOWEyPsUkGF7+Hn29W1Bp64Q9gcZ8KIi8iDOG+XCnVuNfzksUm9bCVCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T21:54:43.525496Z"},"content_sha256":"b34a001d4b93582a53c7aa12a162a52a7f89dd4089303e36b2616b732da30a28","schema_version":"1.0","event_id":"sha256:b34a001d4b93582a53c7aa12a162a52a7f89dd4089303e36b2616b732da30a28"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:KAPKDPTN5F442HYJMG3LPVVKSE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Interstellar Scintillation Monitoring of the RadioAstron Blazars","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Alex Kraus, Giuseppe Cim\\`o, Hayley Bignall, J. Anton Zensus, Jun Liu, Kirill V. Sokolovsky, Thomas P. Krichbaum, Xiang Liu, Yuri Y. Kovalev","submitted_at":"2019-09-03T10:25:31Z","abstract_excerpt":"The RadioAstron space radio telescope provides a unique opportunity to study the extreme brightness temperatures ($\\mathrm{T_B }$) in AGNs with unprecedented long baselines of up to 28 Earth diameters. Since interstellar scintillation (ISS) may affect the visibilities observed with space VLBI (sVLBI), a complementary ground based flux density monitoring of the RadioAstron targets, which is performed near in time to the VLBI observation, could be beneficial. The combination/comparison with the sVLBI data can help to unravel the relative influence of source intrinsic and ISS induced effects, whi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.01043","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/1909.01043/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":"2026-07-05T00:01:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NPZ3mOPQTNco5RwdHLYhGBkbWrBO5tNPyyEYsgUVCYZcp0DWnif0MGA5hDiNGnjSel6LVdamcmIiIJXfUjsTBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T21:54:43.526325Z"},"content_sha256":"357e69e9d86e38a017d4df80525345e79e79d2c025d3a96478c6cd2bd5658af0","schema_version":"1.0","event_id":"sha256:357e69e9d86e38a017d4df80525345e79e79d2c025d3a96478c6cd2bd5658af0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KAPKDPTN5F442HYJMG3LPVVKSE/bundle.json","state_url":"https://pith.science/pith/KAPKDPTN5F442HYJMG3LPVVKSE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KAPKDPTN5F442HYJMG3LPVVKSE/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":"2026-08-15T21:54:43Z","links":{"resolver":"https://pith.science/pith/KAPKDPTN5F442HYJMG3LPVVKSE","bundle":"https://pith.science/pith/KAPKDPTN5F442HYJMG3LPVVKSE/bundle.json","state":"https://pith.science/pith/KAPKDPTN5F442HYJMG3LPVVKSE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KAPKDPTN5F442HYJMG3LPVVKSE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:KAPKDPTN5F442HYJMG3LPVVKSE","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":"8140d93030388255efbd1d2e28c686cfa0f46ece93f1fd9bc9229fbaf78fb976","cross_cats_sorted":["astro-ph.HE"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-09-03T10:25:31Z","title_canon_sha256":"d9da7715018af400fcb1ead9f8a63c7f85c6dae237c16ae2a4f9ee8aac6bfe91"},"schema_version":"1.0","source":{"id":"1909.01043","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.01043","created_at":"2026-07-05T00:01:15Z"},{"alias_kind":"arxiv_version","alias_value":"1909.01043v1","created_at":"2026-07-05T00:01:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.01043","created_at":"2026-07-05T00:01:15Z"},{"alias_kind":"pith_short_12","alias_value":"KAPKDPTN5F44","created_at":"2026-07-05T00:01:15Z"},{"alias_kind":"pith_short_16","alias_value":"KAPKDPTN5F442HYJ","created_at":"2026-07-05T00:01:15Z"},{"alias_kind":"pith_short_8","alias_value":"KAPKDPTN","created_at":"2026-07-05T00:01:15Z"}],"graph_snapshots":[{"event_id":"sha256:357e69e9d86e38a017d4df80525345e79e79d2c025d3a96478c6cd2bd5658af0","target":"graph","created_at":"2026-07-05T00:01:15Z","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/1909.01043/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The RadioAstron space radio telescope provides a unique opportunity to study the extreme brightness temperatures ($\\mathrm{T_B }$) in AGNs with unprecedented long baselines of up to 28 Earth diameters. Since interstellar scintillation (ISS) may affect the visibilities observed with space VLBI (sVLBI), a complementary ground based flux density monitoring of the RadioAstron targets, which is performed near in time to the VLBI observation, could be beneficial. The combination/comparison with the sVLBI data can help to unravel the relative influence of source intrinsic and ISS induced effects, whi","authors_text":"Alex Kraus, Giuseppe Cim\\`o, Hayley Bignall, J. Anton Zensus, Jun Liu, Kirill V. Sokolovsky, Thomas P. Krichbaum, Xiang Liu, Yuri Y. Kovalev","cross_cats":["astro-ph.HE"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-09-03T10:25:31Z","title":"Interstellar Scintillation Monitoring of the RadioAstron Blazars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.01043","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:b34a001d4b93582a53c7aa12a162a52a7f89dd4089303e36b2616b732da30a28","target":"record","created_at":"2026-07-05T00:01:15Z","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":"8140d93030388255efbd1d2e28c686cfa0f46ece93f1fd9bc9229fbaf78fb976","cross_cats_sorted":["astro-ph.HE"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-09-03T10:25:31Z","title_canon_sha256":"d9da7715018af400fcb1ead9f8a63c7f85c6dae237c16ae2a4f9ee8aac6bfe91"},"schema_version":"1.0","source":{"id":"1909.01043","kind":"arxiv","version":1}},"canonical_sha256":"501ea1be6de979cd1f0961b6b7d6aa910481653dd8051340736e56c63cd82395","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"501ea1be6de979cd1f0961b6b7d6aa910481653dd8051340736e56c63cd82395","first_computed_at":"2026-07-05T00:01:15.308759Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:01:15.308759Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZTiN+EPkd8jEm7UR/98kCg7iivO9s0nvfN5K+c/VmmU1zlFaSTxikS4CBKhFjYnA8DtbV7S3C1z9+o2lFIznAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:01:15.309177Z","signed_message":"canonical_sha256_bytes"},"source_id":"1909.01043","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b34a001d4b93582a53c7aa12a162a52a7f89dd4089303e36b2616b732da30a28","sha256:357e69e9d86e38a017d4df80525345e79e79d2c025d3a96478c6cd2bd5658af0"],"state_sha256":"96096f9b6506928b3eb4c43ec1b06c3d49864a551cd0114cb78ac35354489a14"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GIOr2v9wkkA2yj8bFxLLuSzulm9DkQlYivAvdwvJA2+A0lYjIsAo1H6O6oYGsTJhkYHSceoyny/+Z7L8OoibDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-15T21:54:43.531308Z","bundle_sha256":"1542d58f9cf2b6044b7875d09d012722878bb44a29a7ee078058a7455ac85ffd"}}