{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:3AZPCULKNFO65VRW5TUM4AOSQK","short_pith_number":"pith:3AZPCULK","canonical_record":{"source":{"id":"2109.06735","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-09-14T14:47:30Z","cross_cats_sorted":[],"title_canon_sha256":"cf84ad81e22d592c7fbec0b7186cb47d686a0386d5353a5d898ba38328b5a89c","abstract_canon_sha256":"dd1c017d9351300a0219a7cbd9f3b57ce8f637e1ae1f34b66041ca1abbb0ef0f"},"schema_version":"1.0"},"canonical_sha256":"d832f1516a695deed636ece8ce01d282828425502748fcc96cadef3b87efd51e","source":{"kind":"arxiv","id":"2109.06735","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.06735","created_at":"2026-07-05T03:38:33Z"},{"alias_kind":"arxiv_version","alias_value":"2109.06735v1","created_at":"2026-07-05T03:38:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.06735","created_at":"2026-07-05T03:38:33Z"},{"alias_kind":"pith_short_12","alias_value":"3AZPCULKNFO6","created_at":"2026-07-05T03:38:33Z"},{"alias_kind":"pith_short_16","alias_value":"3AZPCULKNFO65VRW","created_at":"2026-07-05T03:38:33Z"},{"alias_kind":"pith_short_8","alias_value":"3AZPCULK","created_at":"2026-07-05T03:38:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:3AZPCULKNFO65VRW5TUM4AOSQK","target":"record","payload":{"canonical_record":{"source":{"id":"2109.06735","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-09-14T14:47:30Z","cross_cats_sorted":[],"title_canon_sha256":"cf84ad81e22d592c7fbec0b7186cb47d686a0386d5353a5d898ba38328b5a89c","abstract_canon_sha256":"dd1c017d9351300a0219a7cbd9f3b57ce8f637e1ae1f34b66041ca1abbb0ef0f"},"schema_version":"1.0"},"canonical_sha256":"d832f1516a695deed636ece8ce01d282828425502748fcc96cadef3b87efd51e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:38:33.661880Z","signature_b64":"DAB+UGj7NfhPYbus8WivngMgEQAsYW1DLSjoHv/k0cS2hyEfa0Itr4/A1bJ6mtdru/Q6Hl+gshWzjQKJ8jKRAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d832f1516a695deed636ece8ce01d282828425502748fcc96cadef3b87efd51e","last_reissued_at":"2026-07-05T03:38:33.661273Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:38:33.661273Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2109.06735","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":"2026-07-05T03:38:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"19TskWQCBij8vgrIs9zZt34f4bKrtx2SegWYscWDGz87YzPvUYdhuo94U5Q3dxs+plrVZ2uuDeWhQ49nYCWZBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-20T21:07:21.499876Z"},"content_sha256":"adc9ea5047c41c953e64d38966173df2ae3f89590b288af933a20cff3bbae123","schema_version":"1.0","event_id":"sha256:adc9ea5047c41c953e64d38966173df2ae3f89590b288af933a20cff3bbae123"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:3AZPCULKNFO65VRW5TUM4AOSQK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The LOFAR Two-metre Sky Survey Deep fields: A new analysis of low-frequency radio luminosity as a star-formation tracer in the Lockman Hole region","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"C. Tasse, D. J. B. Smith, G. Calistro Rivera, G. de Zotti, G. G\\\"urkan, H. J. A. R\\\"ottgering, I. Prandoni, K. Malek, L. Wang, M. Bonato, M. Bondi, M. Magliocchetti, P. Haskell, P. N. Best, R. K. Cochrane, R. Kondapally, S. K. Leslie","submitted_at":"2021-09-14T14:47:30Z","abstract_excerpt":"We have exploited LOFAR deep observations of the Lockman Hole field at 150 MHz to investigate the relation between the radio luminosity of star-forming galaxies (SFGs) and their star formation rates (SFRs), as well as its dependence on stellar mass and redshift. The adopted source classification, SFRs and stellar masses are consensus estimates based on a combination of four different SED fitting methods. We note a flattening of radio spectra of a substantial minority of sources below $\\sim 1.4 $ GHz. Such sources have thus a lower \"radio-loudness\" level at 150 MHz than expected from extrapolat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.06735","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/2109.06735/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":"2026-07-05T03:38:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"V0ma5kxBCe90Qqx30k3jTg6vcSOizGLnl3nElUd0ZC+89NtUsH6pFfycYStfjDBicjW+/Ti5Doxo2nLW6TDrAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-20T21:07:21.500249Z"},"content_sha256":"7f8d5e6782e1dcc2d09895145c830faf58d3204349decbc36a9aaadebd9c872e","schema_version":"1.0","event_id":"sha256:7f8d5e6782e1dcc2d09895145c830faf58d3204349decbc36a9aaadebd9c872e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3AZPCULKNFO65VRW5TUM4AOSQK/bundle.json","state_url":"https://pith.science/pith/3AZPCULKNFO65VRW5TUM4AOSQK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3AZPCULKNFO65VRW5TUM4AOSQK/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":"2026-07-20T21:07:21Z","links":{"resolver":"https://pith.science/pith/3AZPCULKNFO65VRW5TUM4AOSQK","bundle":"https://pith.science/pith/3AZPCULKNFO65VRW5TUM4AOSQK/bundle.json","state":"https://pith.science/pith/3AZPCULKNFO65VRW5TUM4AOSQK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3AZPCULKNFO65VRW5TUM4AOSQK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:3AZPCULKNFO65VRW5TUM4AOSQK","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":"dd1c017d9351300a0219a7cbd9f3b57ce8f637e1ae1f34b66041ca1abbb0ef0f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-09-14T14:47:30Z","title_canon_sha256":"cf84ad81e22d592c7fbec0b7186cb47d686a0386d5353a5d898ba38328b5a89c"},"schema_version":"1.0","source":{"id":"2109.06735","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.06735","created_at":"2026-07-05T03:38:33Z"},{"alias_kind":"arxiv_version","alias_value":"2109.06735v1","created_at":"2026-07-05T03:38:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.06735","created_at":"2026-07-05T03:38:33Z"},{"alias_kind":"pith_short_12","alias_value":"3AZPCULKNFO6","created_at":"2026-07-05T03:38:33Z"},{"alias_kind":"pith_short_16","alias_value":"3AZPCULKNFO65VRW","created_at":"2026-07-05T03:38:33Z"},{"alias_kind":"pith_short_8","alias_value":"3AZPCULK","created_at":"2026-07-05T03:38:33Z"}],"graph_snapshots":[{"event_id":"sha256:7f8d5e6782e1dcc2d09895145c830faf58d3204349decbc36a9aaadebd9c872e","target":"graph","created_at":"2026-07-05T03:38:33Z","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/2109.06735/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We have exploited LOFAR deep observations of the Lockman Hole field at 150 MHz to investigate the relation between the radio luminosity of star-forming galaxies (SFGs) and their star formation rates (SFRs), as well as its dependence on stellar mass and redshift. The adopted source classification, SFRs and stellar masses are consensus estimates based on a combination of four different SED fitting methods. We note a flattening of radio spectra of a substantial minority of sources below $\\sim 1.4 $ GHz. Such sources have thus a lower \"radio-loudness\" level at 150 MHz than expected from extrapolat","authors_text":"C. Tasse, D. J. B. Smith, G. Calistro Rivera, G. de Zotti, G. G\\\"urkan, H. J. A. R\\\"ottgering, I. Prandoni, K. Malek, L. Wang, M. Bonato, M. Bondi, M. Magliocchetti, P. Haskell, P. N. Best, R. K. Cochrane, R. Kondapally, S. K. Leslie","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-09-14T14:47:30Z","title":"The LOFAR Two-metre Sky Survey Deep fields: A new analysis of low-frequency radio luminosity as a star-formation tracer in the Lockman Hole region"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.06735","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:adc9ea5047c41c953e64d38966173df2ae3f89590b288af933a20cff3bbae123","target":"record","created_at":"2026-07-05T03:38:33Z","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":"dd1c017d9351300a0219a7cbd9f3b57ce8f637e1ae1f34b66041ca1abbb0ef0f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-09-14T14:47:30Z","title_canon_sha256":"cf84ad81e22d592c7fbec0b7186cb47d686a0386d5353a5d898ba38328b5a89c"},"schema_version":"1.0","source":{"id":"2109.06735","kind":"arxiv","version":1}},"canonical_sha256":"d832f1516a695deed636ece8ce01d282828425502748fcc96cadef3b87efd51e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d832f1516a695deed636ece8ce01d282828425502748fcc96cadef3b87efd51e","first_computed_at":"2026-07-05T03:38:33.661273Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:38:33.661273Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DAB+UGj7NfhPYbus8WivngMgEQAsYW1DLSjoHv/k0cS2hyEfa0Itr4/A1bJ6mtdru/Q6Hl+gshWzjQKJ8jKRAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T03:38:33.661880Z","signed_message":"canonical_sha256_bytes"},"source_id":"2109.06735","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:adc9ea5047c41c953e64d38966173df2ae3f89590b288af933a20cff3bbae123","sha256:7f8d5e6782e1dcc2d09895145c830faf58d3204349decbc36a9aaadebd9c872e"],"state_sha256":"8dee5c0e6b9a84b80d6c1b569eaf5af9dfa02c27eacf5cc899ddab284789059c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NHJHQAytD2n0S9q741Ure+rHqWMVIsF/yhveg35MkBTT7FQQyyzPnrJGEFlue+M76PuIbt2WsMIVX0Zh0UQWAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-20T21:07:21.502425Z","bundle_sha256":"bf513377d0c186f88e5d75d131c0ef91b2a6e2775e659be5e478ea596668d17b"}}