{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:NWXAT3MEUBTL2HGCCPHQ3AKCWP","short_pith_number":"pith:NWXAT3ME","canonical_record":{"source":{"id":"0910.0444","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-02T17:00:10Z","cross_cats_sorted":[],"title_canon_sha256":"c8f0a7dde7b04ee5571d4c7276e0f39ae84a98ee8ce349770466bf2fca5252f2","abstract_canon_sha256":"05fb7349f574c54c7e2aa044d6f1b670e5007a59f3bea6ff676a34a4e798b741"},"schema_version":"1.0"},"canonical_sha256":"6dae09ed84a066bd1cc213cf0d8142b3caf161df81ef64cb27e248f77a52712e","source":{"kind":"arxiv","id":"0910.0444","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.0444","created_at":"2026-05-18T04:27:15Z"},{"alias_kind":"arxiv_version","alias_value":"0910.0444v2","created_at":"2026-05-18T04:27:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.0444","created_at":"2026-05-18T04:27:15Z"},{"alias_kind":"pith_short_12","alias_value":"NWXAT3MEUBTL","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"NWXAT3MEUBTL2HGC","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"NWXAT3ME","created_at":"2026-05-18T12:26:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:NWXAT3MEUBTL2HGCCPHQ3AKCWP","target":"record","payload":{"canonical_record":{"source":{"id":"0910.0444","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-02T17:00:10Z","cross_cats_sorted":[],"title_canon_sha256":"c8f0a7dde7b04ee5571d4c7276e0f39ae84a98ee8ce349770466bf2fca5252f2","abstract_canon_sha256":"05fb7349f574c54c7e2aa044d6f1b670e5007a59f3bea6ff676a34a4e798b741"},"schema_version":"1.0"},"canonical_sha256":"6dae09ed84a066bd1cc213cf0d8142b3caf161df81ef64cb27e248f77a52712e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:27:15.161281Z","signature_b64":"O1XFSxRupq0W/z1B+CWxWY0d3x0iZSpCU7dY6jQBBZOCNZgC5Bgfc/0nbULN2wuZL8IY5PW8hDZn41UQsMGhCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6dae09ed84a066bd1cc213cf0d8142b3caf161df81ef64cb27e248f77a52712e","last_reissued_at":"2026-05-18T04:27:15.160592Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:27:15.160592Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0910.0444","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:27:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LgZFxopFNsSCaQtIT7DKssTd3IzaVjMfuqehaopgtXg9/wDcxd123d8GlY306+sVQoI8FNP0zDMdg8DTtjItBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T15:09:04.650596Z"},"content_sha256":"67378e6879155a215706fdc9d4b52a16b28e1812fd2e4f139404bc98cd66cd21","schema_version":"1.0","event_id":"sha256:67378e6879155a215706fdc9d4b52a16b28e1812fd2e4f139404bc98cd66cd21"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:NWXAT3MEUBTL2HGCCPHQ3AKCWP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spectroscopy of luminous z>7 galaxy candidates and sources of contamination in z>7 galaxy searches","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Leauthaud, A.M. Koekemoer, B. Mobasher, C. Carilli, C.J. Willott, D.B. Sanders, D. Thompson, E. Jullo, E. LeFloch, E. Schinnerer, F. Civano, H. Aussel, H. McCracken, J. Kartaltepe, J.-P. Kneib, K. Menendez-Delmestre, M. Elvis, M. Giavalisco, M. Salvato, N.Z. Scoville, O. Ilbert, P. Capak, P. Shopbell, Y. Shioya, Y.Tanaguchi","submitted_at":"2009-10-02T17:00:10Z","abstract_excerpt":"We present three bright z+ dropout candidates selected from deep Near-Infrared (NIR) imaging of the COSMOS 2 square degree field. All three objects match the 0.8-8um colors of other published z>7 candidates but are three magnitudes brighter, facilitating further study. Deep spectroscopy of two of the candidates covering 0.64-1.02um with Keck-DEIMOS and all three covering 0.94-1.10um and 1.52-1.80um with Keck-NIRSPEC detects weak spectral features tentatively identified as Ly-alpha at z=6.95 and z=7.69 in two of the objects. The third object is placed at z~1.6 based on a 24um and weak optical d"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.0444","kind":"arxiv","version":2},"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":"2026-05-18T04:27:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"j2H1wxgAVZWbb0HbHpFKfN/fQJ0jtODSEWeGy6tFVCT1i7S/uEsSD/ocK6Nas0h/dGi4m0hEP558HtAAHRZ/DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T15:09:04.650945Z"},"content_sha256":"3f42c170227094e8fb76bbb6b719a900b016d4af6f1c23f686b0e2452f678926","schema_version":"1.0","event_id":"sha256:3f42c170227094e8fb76bbb6b719a900b016d4af6f1c23f686b0e2452f678926"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NWXAT3MEUBTL2HGCCPHQ3AKCWP/bundle.json","state_url":"https://pith.science/pith/NWXAT3MEUBTL2HGCCPHQ3AKCWP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NWXAT3MEUBTL2HGCCPHQ3AKCWP/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":"2026-05-19T15:09:04Z","links":{"resolver":"https://pith.science/pith/NWXAT3MEUBTL2HGCCPHQ3AKCWP","bundle":"https://pith.science/pith/NWXAT3MEUBTL2HGCCPHQ3AKCWP/bundle.json","state":"https://pith.science/pith/NWXAT3MEUBTL2HGCCPHQ3AKCWP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NWXAT3MEUBTL2HGCCPHQ3AKCWP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:NWXAT3MEUBTL2HGCCPHQ3AKCWP","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":"05fb7349f574c54c7e2aa044d6f1b670e5007a59f3bea6ff676a34a4e798b741","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-02T17:00:10Z","title_canon_sha256":"c8f0a7dde7b04ee5571d4c7276e0f39ae84a98ee8ce349770466bf2fca5252f2"},"schema_version":"1.0","source":{"id":"0910.0444","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.0444","created_at":"2026-05-18T04:27:15Z"},{"alias_kind":"arxiv_version","alias_value":"0910.0444v2","created_at":"2026-05-18T04:27:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.0444","created_at":"2026-05-18T04:27:15Z"},{"alias_kind":"pith_short_12","alias_value":"NWXAT3MEUBTL","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"NWXAT3MEUBTL2HGC","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"NWXAT3ME","created_at":"2026-05-18T12:26:01Z"}],"graph_snapshots":[{"event_id":"sha256:3f42c170227094e8fb76bbb6b719a900b016d4af6f1c23f686b0e2452f678926","target":"graph","created_at":"2026-05-18T04:27:15Z","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"},"paper":{"abstract_excerpt":"We present three bright z+ dropout candidates selected from deep Near-Infrared (NIR) imaging of the COSMOS 2 square degree field. All three objects match the 0.8-8um colors of other published z>7 candidates but are three magnitudes brighter, facilitating further study. Deep spectroscopy of two of the candidates covering 0.64-1.02um with Keck-DEIMOS and all three covering 0.94-1.10um and 1.52-1.80um with Keck-NIRSPEC detects weak spectral features tentatively identified as Ly-alpha at z=6.95 and z=7.69 in two of the objects. The third object is placed at z~1.6 based on a 24um and weak optical d","authors_text":"A. Leauthaud, A.M. Koekemoer, B. Mobasher, C. Carilli, C.J. Willott, D.B. Sanders, D. Thompson, E. Jullo, E. LeFloch, E. Schinnerer, F. Civano, H. Aussel, H. McCracken, J. Kartaltepe, J.-P. Kneib, K. Menendez-Delmestre, M. Elvis, M. Giavalisco, M. Salvato, N.Z. Scoville, O. Ilbert, P. Capak, P. Shopbell, Y. Shioya, Y.Tanaguchi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-02T17:00:10Z","title":"Spectroscopy of luminous z>7 galaxy candidates and sources of contamination in z>7 galaxy searches"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.0444","kind":"arxiv","version":2},"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":"sha256:67378e6879155a215706fdc9d4b52a16b28e1812fd2e4f139404bc98cd66cd21","target":"record","created_at":"2026-05-18T04:27:15Z","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":"05fb7349f574c54c7e2aa044d6f1b670e5007a59f3bea6ff676a34a4e798b741","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-02T17:00:10Z","title_canon_sha256":"c8f0a7dde7b04ee5571d4c7276e0f39ae84a98ee8ce349770466bf2fca5252f2"},"schema_version":"1.0","source":{"id":"0910.0444","kind":"arxiv","version":2}},"canonical_sha256":"6dae09ed84a066bd1cc213cf0d8142b3caf161df81ef64cb27e248f77a52712e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6dae09ed84a066bd1cc213cf0d8142b3caf161df81ef64cb27e248f77a52712e","first_computed_at":"2026-05-18T04:27:15.160592Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:27:15.160592Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"O1XFSxRupq0W/z1B+CWxWY0d3x0iZSpCU7dY6jQBBZOCNZgC5Bgfc/0nbULN2wuZL8IY5PW8hDZn41UQsMGhCg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:27:15.161281Z","signed_message":"canonical_sha256_bytes"},"source_id":"0910.0444","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:67378e6879155a215706fdc9d4b52a16b28e1812fd2e4f139404bc98cd66cd21","sha256:3f42c170227094e8fb76bbb6b719a900b016d4af6f1c23f686b0e2452f678926"],"state_sha256":"e0f2cb632a5a7d986404d9fcd5cbc6d889c20dac8da5694fe972043826230b26"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"068S1rLp8BVYvkAGJhVhr4jiMUXBvlYEyzFqhXIKRg9aUsuavkOJxH23H2+4Dwp4fNWwKWkTMubpjeOUN+qOAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-19T15:09:04.653744Z","bundle_sha256":"a1705ee58c92658a20f714eb7f4673b3d55ef93f44cd55aef8a0c561bdd1d542"}}