{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:4KHVQVTGWOIVXHU3I3DOISO5PJ","short_pith_number":"pith:4KHVQVTG","canonical_record":{"source":{"id":"1012.2266","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2010-12-10T13:49:07Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"fa75776e1776692176a7caaf7daf9aaee6d642b4448ae0945d38a090b7f79a8c","abstract_canon_sha256":"2f1fe9bf5398aacee271cdfe40be7cd5390fdae6f200f378902c3f482311f3fa"},"schema_version":"1.0"},"canonical_sha256":"e28f585666b3915b9e9b46c6e449dd7a43749eed6e56f4d1a1dd50d4742630fe","source":{"kind":"arxiv","id":"1012.2266","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.2266","created_at":"2026-05-18T04:33:38Z"},{"alias_kind":"arxiv_version","alias_value":"1012.2266v1","created_at":"2026-05-18T04:33:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.2266","created_at":"2026-05-18T04:33:38Z"},{"alias_kind":"pith_short_12","alias_value":"4KHVQVTGWOIV","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"4KHVQVTGWOIVXHU3","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"4KHVQVTG","created_at":"2026-05-18T12:26:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:4KHVQVTGWOIVXHU3I3DOISO5PJ","target":"record","payload":{"canonical_record":{"source":{"id":"1012.2266","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2010-12-10T13:49:07Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"fa75776e1776692176a7caaf7daf9aaee6d642b4448ae0945d38a090b7f79a8c","abstract_canon_sha256":"2f1fe9bf5398aacee271cdfe40be7cd5390fdae6f200f378902c3f482311f3fa"},"schema_version":"1.0"},"canonical_sha256":"e28f585666b3915b9e9b46c6e449dd7a43749eed6e56f4d1a1dd50d4742630fe","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:33:38.152482Z","signature_b64":"kD9RBj7rEGZtANiJbihhVLciLZUfbL0G4Tsznpa0NvJiRiYkfgsrg+uX+2xjYzD9pyduo1NLIcwAH3vtsc8iBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e28f585666b3915b9e9b46c6e449dd7a43749eed6e56f4d1a1dd50d4742630fe","last_reissued_at":"2026-05-18T04:33:38.152074Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:33:38.152074Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1012.2266","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":"2026-05-18T04:33:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vs8u7tzRq3gI+W3UYO1T4EQYOs/Ps3MtpbVB12SUR9flF3/YWEhMZJFCL9KX2LLxRTRbDQrNE9Jm02SY7JTLBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T05:37:21.581084Z"},"content_sha256":"dc468aa5b4cf5cc38fa6ecce9e1c404a98839d0c16f52ff31e3d9839c89787f0","schema_version":"1.0","event_id":"sha256:dc468aa5b4cf5cc38fa6ecce9e1c404a98839d0c16f52ff31e3d9839c89787f0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:4KHVQVTGWOIVXHU3I3DOISO5PJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"LOFAR and HDF5: Toward a New Radio Data Standard","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.IM","authors_text":"Adriaan Renting, Anastasia Alexov, Jean-Mathias Griessmeier, Kenneth Anderson, Lars Baehren, Michael Wise","submitted_at":"2010-12-10T13:49:07Z","abstract_excerpt":"For decades now, scientific data volumes have experienced relentless, exponential growth. As a result, legacy astronomical data formats are straining under a burden not conceived when these formats were first introduced. With future astronomical projects ensuring this trend, ASTRON and the LOFAR project are exploring the use of the Hierarchical Data Format, version 5 (HDF5), for LOFAR radio data encapsulation. Most of LOFAR's standard data products will be stored using the HDF5 format. In addition, HDF5 analogues for traditional radio data structures such as visibility data and spectral image "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.2266","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":"2026-05-18T04:33:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lRoXDEoUUzAlcxJKNUvEeMsg/cJk0bCw2OwAkkz5ZhOTkB4vdKlcHK0sT43/zrWFX7dCK0RaqS4IBGbHWRwJBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T05:37:21.581451Z"},"content_sha256":"1453db0fca19a5e1a96ebd0b1e2184644fe3c4526bf1c9ec7e4c53696c4104ce","schema_version":"1.0","event_id":"sha256:1453db0fca19a5e1a96ebd0b1e2184644fe3c4526bf1c9ec7e4c53696c4104ce"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4KHVQVTGWOIVXHU3I3DOISO5PJ/bundle.json","state_url":"https://pith.science/pith/4KHVQVTGWOIVXHU3I3DOISO5PJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4KHVQVTGWOIVXHU3I3DOISO5PJ/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":"2026-06-03T05:37:21Z","links":{"resolver":"https://pith.science/pith/4KHVQVTGWOIVXHU3I3DOISO5PJ","bundle":"https://pith.science/pith/4KHVQVTGWOIVXHU3I3DOISO5PJ/bundle.json","state":"https://pith.science/pith/4KHVQVTGWOIVXHU3I3DOISO5PJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4KHVQVTGWOIVXHU3I3DOISO5PJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:4KHVQVTGWOIVXHU3I3DOISO5PJ","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":"2f1fe9bf5398aacee271cdfe40be7cd5390fdae6f200f378902c3f482311f3fa","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2010-12-10T13:49:07Z","title_canon_sha256":"fa75776e1776692176a7caaf7daf9aaee6d642b4448ae0945d38a090b7f79a8c"},"schema_version":"1.0","source":{"id":"1012.2266","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.2266","created_at":"2026-05-18T04:33:38Z"},{"alias_kind":"arxiv_version","alias_value":"1012.2266v1","created_at":"2026-05-18T04:33:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.2266","created_at":"2026-05-18T04:33:38Z"},{"alias_kind":"pith_short_12","alias_value":"4KHVQVTGWOIV","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"4KHVQVTGWOIVXHU3","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"4KHVQVTG","created_at":"2026-05-18T12:26:03Z"}],"graph_snapshots":[{"event_id":"sha256:1453db0fca19a5e1a96ebd0b1e2184644fe3c4526bf1c9ec7e4c53696c4104ce","target":"graph","created_at":"2026-05-18T04:33:38Z","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":"For decades now, scientific data volumes have experienced relentless, exponential growth. As a result, legacy astronomical data formats are straining under a burden not conceived when these formats were first introduced. With future astronomical projects ensuring this trend, ASTRON and the LOFAR project are exploring the use of the Hierarchical Data Format, version 5 (HDF5), for LOFAR radio data encapsulation. Most of LOFAR's standard data products will be stored using the HDF5 format. In addition, HDF5 analogues for traditional radio data structures such as visibility data and spectral image ","authors_text":"Adriaan Renting, Anastasia Alexov, Jean-Mathias Griessmeier, Kenneth Anderson, Lars Baehren, Michael Wise","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2010-12-10T13:49:07Z","title":"LOFAR and HDF5: Toward a New Radio Data Standard"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.2266","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:dc468aa5b4cf5cc38fa6ecce9e1c404a98839d0c16f52ff31e3d9839c89787f0","target":"record","created_at":"2026-05-18T04:33:38Z","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":"2f1fe9bf5398aacee271cdfe40be7cd5390fdae6f200f378902c3f482311f3fa","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2010-12-10T13:49:07Z","title_canon_sha256":"fa75776e1776692176a7caaf7daf9aaee6d642b4448ae0945d38a090b7f79a8c"},"schema_version":"1.0","source":{"id":"1012.2266","kind":"arxiv","version":1}},"canonical_sha256":"e28f585666b3915b9e9b46c6e449dd7a43749eed6e56f4d1a1dd50d4742630fe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e28f585666b3915b9e9b46c6e449dd7a43749eed6e56f4d1a1dd50d4742630fe","first_computed_at":"2026-05-18T04:33:38.152074Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:33:38.152074Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kD9RBj7rEGZtANiJbihhVLciLZUfbL0G4Tsznpa0NvJiRiYkfgsrg+uX+2xjYzD9pyduo1NLIcwAH3vtsc8iBg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:33:38.152482Z","signed_message":"canonical_sha256_bytes"},"source_id":"1012.2266","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dc468aa5b4cf5cc38fa6ecce9e1c404a98839d0c16f52ff31e3d9839c89787f0","sha256:1453db0fca19a5e1a96ebd0b1e2184644fe3c4526bf1c9ec7e4c53696c4104ce"],"state_sha256":"b16b51a21639f0dbad68a6dd6b1da82eff12b37e7d71a982374c9c4606eb3a33"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YIZhlduRyzjFfmi7CnoLSpked1rKjdmg92M2Wix61KXZJlpSvQYmgkHLpYuCGaeZ8iLT/1rWFoQRY4mpqPe1BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T05:37:21.583431Z","bundle_sha256":"7523086225addf510f60e01678d7cfce8cd8912b5d498534b6ae450f7a57b1dd"}}