{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:DMKBTKYLVQVPS7I3454N7BZPYL","short_pith_number":"pith:DMKBTKYL","canonical_record":{"source":{"id":"1605.01531","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-05-05T08:53:41Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"463429dcf2b91c64a3207f45a389229f359d7c2785c2d9c21a0bbb9839cec996","abstract_canon_sha256":"efdb717985fde28f542f2aa82dfd38997e4ecaaae5a7d2199f52c32c4a196f5d"},"schema_version":"1.0"},"canonical_sha256":"1b1419ab0bac2af97d1be778df872fc2cb73d20f6aec7b6d4206c27aa5eb0ee0","source":{"kind":"arxiv","id":"1605.01531","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.01531","created_at":"2026-05-18T01:08:41Z"},{"alias_kind":"arxiv_version","alias_value":"1605.01531v1","created_at":"2026-05-18T01:08:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.01531","created_at":"2026-05-18T01:08:41Z"},{"alias_kind":"pith_short_12","alias_value":"DMKBTKYLVQVP","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_16","alias_value":"DMKBTKYLVQVPS7I3","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_8","alias_value":"DMKBTKYL","created_at":"2026-05-18T12:30:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:DMKBTKYLVQVPS7I3454N7BZPYL","target":"record","payload":{"canonical_record":{"source":{"id":"1605.01531","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-05-05T08:53:41Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"463429dcf2b91c64a3207f45a389229f359d7c2785c2d9c21a0bbb9839cec996","abstract_canon_sha256":"efdb717985fde28f542f2aa82dfd38997e4ecaaae5a7d2199f52c32c4a196f5d"},"schema_version":"1.0"},"canonical_sha256":"1b1419ab0bac2af97d1be778df872fc2cb73d20f6aec7b6d4206c27aa5eb0ee0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:08:41.528361Z","signature_b64":"XuhdzEiwIickVxkCakHwW/IFp76LYRT5hlzaNPXG/UvpqcPZFluOuPJzb2tk9DIdiei63TRq7CQTJLTcVj7mAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1b1419ab0bac2af97d1be778df872fc2cb73d20f6aec7b6d4206c27aa5eb0ee0","last_reissued_at":"2026-05-18T01:08:41.527877Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:08:41.527877Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1605.01531","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":"2026-05-18T01:08:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RuuXVXJcG2VmOqZkjeTM0pCR2YKBTRChu57k+IEbgwA6xPk4swaz5tA5cER5x1Vm+rckI9//sJO+J0in/yqUAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T17:02:23.712194Z"},"content_sha256":"f37acb2f1c5d1a527687929a2973ecb50a62581bafe4332bae7b468afd43d8c3","schema_version":"1.0","event_id":"sha256:f37acb2f1c5d1a527687929a2973ecb50a62581bafe4332bae7b468afd43d8c3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:DMKBTKYLVQVPS7I3454N7BZPYL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"LOFAR 150-MHz observations of the Bo\\\"otes field: Catalogue and Source Counts","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.CO","authors_text":"A. D. Kapinska, C. Ferrari, C. Tasse, D. Engels, E. K. Mahony, E. Orr\\'u, E. Retana-Montenegro, F. De Gasperin, G. Brunetti, G. Heald, G. J. White, G. K. Miley, H. Falcke, H. J. A. R\\\"ottgering, I. M. van Bemmel, I. Prandoni, J. E. Conway, J. Sabater, J. T. L. Zwart, L. K. Morabito, M. Br\\\"uggen, M. C. Toribio, M. Haverkorn, M. J. Hardcastle, M. J. Jarvis, M. W. Wise, N. Jackson, P. Best, R. J. van Weeren, R. Morganti, S. S. Sridhar, T. En{\\ss}lin, T. J. Dijkema, T. W. Shimwell, W. L. Williams","submitted_at":"2016-05-05T08:53:41Z","abstract_excerpt":"We present the first wide area (19 deg$^2$), deep ($\\approx120-150$ {\\mu}Jy beam$^{-1}$), high resolution ($5.6 \\times 7.4$ arcsec) LOFAR High Band Antenna image of the Bo\\\"otes field made at 130-169 MHz. This image is at least an order of magnitude deeper and 3-5 times higher in angular resolution than previously achieved for this field at low frequencies. The observations and data reduction, which includes full direction-dependent calibration, are described here. We present a radio source catalogue containing 6276 sources detected over an area of $19$\\,deg$^2$, with a peak flux density thres"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.01531","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":"2026-05-18T01:08:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A20/nzPFtrJvLlgcQAVB8SWKXH/vhfGpOLN1lk5lQhmeJ9vQPTivcQld1mGfa7hLEveMykgtBS+aS3/klkQVDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T17:02:23.712559Z"},"content_sha256":"dc6a199fc7fea70db86fec42eaeae31cd1965c431991cfd98e1b77ea47b42c8b","schema_version":"1.0","event_id":"sha256:dc6a199fc7fea70db86fec42eaeae31cd1965c431991cfd98e1b77ea47b42c8b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DMKBTKYLVQVPS7I3454N7BZPYL/bundle.json","state_url":"https://pith.science/pith/DMKBTKYLVQVPS7I3454N7BZPYL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DMKBTKYLVQVPS7I3454N7BZPYL/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":"2026-06-01T17:02:23Z","links":{"resolver":"https://pith.science/pith/DMKBTKYLVQVPS7I3454N7BZPYL","bundle":"https://pith.science/pith/DMKBTKYLVQVPS7I3454N7BZPYL/bundle.json","state":"https://pith.science/pith/DMKBTKYLVQVPS7I3454N7BZPYL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DMKBTKYLVQVPS7I3454N7BZPYL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:DMKBTKYLVQVPS7I3454N7BZPYL","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":"efdb717985fde28f542f2aa82dfd38997e4ecaaae5a7d2199f52c32c4a196f5d","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-05-05T08:53:41Z","title_canon_sha256":"463429dcf2b91c64a3207f45a389229f359d7c2785c2d9c21a0bbb9839cec996"},"schema_version":"1.0","source":{"id":"1605.01531","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.01531","created_at":"2026-05-18T01:08:41Z"},{"alias_kind":"arxiv_version","alias_value":"1605.01531v1","created_at":"2026-05-18T01:08:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.01531","created_at":"2026-05-18T01:08:41Z"},{"alias_kind":"pith_short_12","alias_value":"DMKBTKYLVQVP","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_16","alias_value":"DMKBTKYLVQVPS7I3","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_8","alias_value":"DMKBTKYL","created_at":"2026-05-18T12:30:12Z"}],"graph_snapshots":[{"event_id":"sha256:dc6a199fc7fea70db86fec42eaeae31cd1965c431991cfd98e1b77ea47b42c8b","target":"graph","created_at":"2026-05-18T01:08:41Z","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":"We present the first wide area (19 deg$^2$), deep ($\\approx120-150$ {\\mu}Jy beam$^{-1}$), high resolution ($5.6 \\times 7.4$ arcsec) LOFAR High Band Antenna image of the Bo\\\"otes field made at 130-169 MHz. This image is at least an order of magnitude deeper and 3-5 times higher in angular resolution than previously achieved for this field at low frequencies. The observations and data reduction, which includes full direction-dependent calibration, are described here. We present a radio source catalogue containing 6276 sources detected over an area of $19$\\,deg$^2$, with a peak flux density thres","authors_text":"A. D. Kapinska, C. Ferrari, C. Tasse, D. Engels, E. K. Mahony, E. Orr\\'u, E. Retana-Montenegro, F. De Gasperin, G. Brunetti, G. Heald, G. J. White, G. K. Miley, H. Falcke, H. J. A. R\\\"ottgering, I. M. van Bemmel, I. Prandoni, J. E. Conway, J. Sabater, J. T. L. Zwart, L. K. Morabito, M. Br\\\"uggen, M. C. Toribio, M. Haverkorn, M. J. Hardcastle, M. J. Jarvis, M. W. Wise, N. Jackson, P. Best, R. J. van Weeren, R. Morganti, S. S. Sridhar, T. En{\\ss}lin, T. J. Dijkema, T. W. Shimwell, W. L. Williams","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-05-05T08:53:41Z","title":"LOFAR 150-MHz observations of the Bo\\\"otes field: Catalogue and Source Counts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.01531","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:f37acb2f1c5d1a527687929a2973ecb50a62581bafe4332bae7b468afd43d8c3","target":"record","created_at":"2026-05-18T01:08:41Z","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":"efdb717985fde28f542f2aa82dfd38997e4ecaaae5a7d2199f52c32c4a196f5d","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-05-05T08:53:41Z","title_canon_sha256":"463429dcf2b91c64a3207f45a389229f359d7c2785c2d9c21a0bbb9839cec996"},"schema_version":"1.0","source":{"id":"1605.01531","kind":"arxiv","version":1}},"canonical_sha256":"1b1419ab0bac2af97d1be778df872fc2cb73d20f6aec7b6d4206c27aa5eb0ee0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1b1419ab0bac2af97d1be778df872fc2cb73d20f6aec7b6d4206c27aa5eb0ee0","first_computed_at":"2026-05-18T01:08:41.527877Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:08:41.527877Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XuhdzEiwIickVxkCakHwW/IFp76LYRT5hlzaNPXG/UvpqcPZFluOuPJzb2tk9DIdiei63TRq7CQTJLTcVj7mAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:08:41.528361Z","signed_message":"canonical_sha256_bytes"},"source_id":"1605.01531","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f37acb2f1c5d1a527687929a2973ecb50a62581bafe4332bae7b468afd43d8c3","sha256:dc6a199fc7fea70db86fec42eaeae31cd1965c431991cfd98e1b77ea47b42c8b"],"state_sha256":"b6a4a37bf8809ff05a2bef4024f7395c474b67bd3c8e3f806ac732ba8e30c749"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wrjQjP9xjq2/0W31ZA3E5sTT7ygh9+J61+GhJuv/1dnxELt9oqQ8oDRNLMrm9VybsnvTBCORwoTzJ6CdaSWlBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T17:02:23.714416Z","bundle_sha256":"62ad0e76a3104d82afa73972ce5fc08897fcf7e0bd7dcf8ed2fa9daae69f2f38"}}