{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:BQENXEZDLCJONEGJ4424EKNKAT","short_pith_number":"pith:BQENXEZD","canonical_record":{"source":{"id":"astro-ph/0409080","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-09-03T14:17:40Z","cross_cats_sorted":[],"title_canon_sha256":"b81cbff2b0a8d2cd5ed234675544ad68d2241037f121176901c0bc95080eba7a","abstract_canon_sha256":"9fad363c0d6137f3912263ad9bf882821c5a434c4ff51e20e0373857e6afcf8a"},"schema_version":"1.0"},"canonical_sha256":"0c08db93235892e690c9e735c229aa04eb91bf2a20ba0f5a1f2796e9a93ae98b","source":{"kind":"arxiv","id":"astro-ph/0409080","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0409080","created_at":"2026-05-18T04:27:04Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0409080v1","created_at":"2026-05-18T04:27:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0409080","created_at":"2026-05-18T04:27:04Z"},{"alias_kind":"pith_short_12","alias_value":"BQENXEZDLCJO","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"BQENXEZDLCJONEGJ","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"BQENXEZD","created_at":"2026-05-18T12:25:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:BQENXEZDLCJONEGJ4424EKNKAT","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0409080","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-09-03T14:17:40Z","cross_cats_sorted":[],"title_canon_sha256":"b81cbff2b0a8d2cd5ed234675544ad68d2241037f121176901c0bc95080eba7a","abstract_canon_sha256":"9fad363c0d6137f3912263ad9bf882821c5a434c4ff51e20e0373857e6afcf8a"},"schema_version":"1.0"},"canonical_sha256":"0c08db93235892e690c9e735c229aa04eb91bf2a20ba0f5a1f2796e9a93ae98b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:27:04.419117Z","signature_b64":"777IokQyFRFnsfFruR3ZiPMFjfJ8ueY31V+gUcP2vzLaOr+bA7xRoPQzGLY5ziIZMsh6pL+IqyxzdDA/HlceBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0c08db93235892e690c9e735c229aa04eb91bf2a20ba0f5a1f2796e9a93ae98b","last_reissued_at":"2026-05-18T04:27:04.418383Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:27:04.418383Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0409080","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":"2026-05-18T04:27:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9lyoSromG2BROp5dzmMeKfcr4Re7G+ImsbahDUobMGsi7fE9RO1yK/b17Gcrzw66HP2UQNM4594AI4ZfIGnZBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T09:11:27.097332Z"},"content_sha256":"b457a790a5ab7697254bf71e9b03abaf9ae5dcb40a5bfa182ba996cf31cdbfbc","schema_version":"1.0","event_id":"sha256:b457a790a5ab7697254bf71e9b03abaf9ae5dcb40a5bfa182ba996cf31cdbfbc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:BQENXEZDLCJONEGJ4424EKNKAT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"DAzLE: The Dark Ages z (redshift) Lyman-alpha Explorer","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Anthony Horton (1), Cambridge (2) Anglo-Australian Observatory), David King (1), Ian Parry (1), Joss Bland-Hawthorn (2), Richard McMahon (1), Sonia Cianci (2), Steve Medlen (1) ((1) Institute of Astronomy","submitted_at":"2004-09-03T14:17:40Z","abstract_excerpt":"DAzLE is an near infrared narrowband differential imager being built by the Institute of Astronomy, Cambridge, in collaboration with the Anglo-Australian observatory. It is a special purpose instrument designed with a sole aim; the detection of redshifted Lyman-alpha emission from star forming galaxies at z>7. DAzLE will use pairs of high resolution (R=1000) narrowband filters to exploit low background `windows' in the near infrared sky emission spectrum. This will enable it to reach sensitivities of ~2E-21 W/m^2, thereby allowing the detection of z>7 galaxies with star formation rates as low "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0409080","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":"2026-05-18T04:27:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mYGoOH0syUJ8VqAY6k28YtAogepn9RvgVYLHBwnAF3+oBWPQkS+hnjuBSus3HJ8XRRjEqRK/wqeTbmW9riAmBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T09:11:27.098017Z"},"content_sha256":"362037424c1cb6b4748aa07765a405e9092c11a8ce09190492f5b7fe2b164498","schema_version":"1.0","event_id":"sha256:362037424c1cb6b4748aa07765a405e9092c11a8ce09190492f5b7fe2b164498"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BQENXEZDLCJONEGJ4424EKNKAT/bundle.json","state_url":"https://pith.science/pith/BQENXEZDLCJONEGJ4424EKNKAT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BQENXEZDLCJONEGJ4424EKNKAT/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":"2026-05-27T09:11:27Z","links":{"resolver":"https://pith.science/pith/BQENXEZDLCJONEGJ4424EKNKAT","bundle":"https://pith.science/pith/BQENXEZDLCJONEGJ4424EKNKAT/bundle.json","state":"https://pith.science/pith/BQENXEZDLCJONEGJ4424EKNKAT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BQENXEZDLCJONEGJ4424EKNKAT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:BQENXEZDLCJONEGJ4424EKNKAT","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":"9fad363c0d6137f3912263ad9bf882821c5a434c4ff51e20e0373857e6afcf8a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-09-03T14:17:40Z","title_canon_sha256":"b81cbff2b0a8d2cd5ed234675544ad68d2241037f121176901c0bc95080eba7a"},"schema_version":"1.0","source":{"id":"astro-ph/0409080","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0409080","created_at":"2026-05-18T04:27:04Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0409080v1","created_at":"2026-05-18T04:27:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0409080","created_at":"2026-05-18T04:27:04Z"},{"alias_kind":"pith_short_12","alias_value":"BQENXEZDLCJO","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"BQENXEZDLCJONEGJ","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"BQENXEZD","created_at":"2026-05-18T12:25:52Z"}],"graph_snapshots":[{"event_id":"sha256:362037424c1cb6b4748aa07765a405e9092c11a8ce09190492f5b7fe2b164498","target":"graph","created_at":"2026-05-18T04:27:04Z","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":"DAzLE is an near infrared narrowband differential imager being built by the Institute of Astronomy, Cambridge, in collaboration with the Anglo-Australian observatory. It is a special purpose instrument designed with a sole aim; the detection of redshifted Lyman-alpha emission from star forming galaxies at z>7. DAzLE will use pairs of high resolution (R=1000) narrowband filters to exploit low background `windows' in the near infrared sky emission spectrum. This will enable it to reach sensitivities of ~2E-21 W/m^2, thereby allowing the detection of z>7 galaxies with star formation rates as low ","authors_text":"Anthony Horton (1), Cambridge (2) Anglo-Australian Observatory), David King (1), Ian Parry (1), Joss Bland-Hawthorn (2), Richard McMahon (1), Sonia Cianci (2), Steve Medlen (1) ((1) Institute of Astronomy","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2004-09-03T14:17:40Z","title":"DAzLE: The Dark Ages z (redshift) Lyman-alpha Explorer"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0409080","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:b457a790a5ab7697254bf71e9b03abaf9ae5dcb40a5bfa182ba996cf31cdbfbc","target":"record","created_at":"2026-05-18T04:27:04Z","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":"9fad363c0d6137f3912263ad9bf882821c5a434c4ff51e20e0373857e6afcf8a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-09-03T14:17:40Z","title_canon_sha256":"b81cbff2b0a8d2cd5ed234675544ad68d2241037f121176901c0bc95080eba7a"},"schema_version":"1.0","source":{"id":"astro-ph/0409080","kind":"arxiv","version":1}},"canonical_sha256":"0c08db93235892e690c9e735c229aa04eb91bf2a20ba0f5a1f2796e9a93ae98b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0c08db93235892e690c9e735c229aa04eb91bf2a20ba0f5a1f2796e9a93ae98b","first_computed_at":"2026-05-18T04:27:04.418383Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:27:04.418383Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"777IokQyFRFnsfFruR3ZiPMFjfJ8ueY31V+gUcP2vzLaOr+bA7xRoPQzGLY5ziIZMsh6pL+IqyxzdDA/HlceBg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:27:04.419117Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0409080","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b457a790a5ab7697254bf71e9b03abaf9ae5dcb40a5bfa182ba996cf31cdbfbc","sha256:362037424c1cb6b4748aa07765a405e9092c11a8ce09190492f5b7fe2b164498"],"state_sha256":"e0f3a1a9a9ee53ba4990bcd2b00716563e12414bc85f3f627733abebc292bb00"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rx4CTNPLhuO7Q4u6eS+7AP0H/7Iv98TMmgp8BUVvamJQaKNhcPnUICgWBVeg3xAkVJ2QHOya3uqDmMAL7oKMBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T09:11:27.101566Z","bundle_sha256":"14f5ec7e94ec49f3e91dcbed25366fa066fdbf69091577bf5d6c05dc18b6a08a"}}