{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:6J4LQEVRKRZIE4JUORPROJBOBZ","short_pith_number":"pith:6J4LQEVR","canonical_record":{"source":{"id":"1201.1800","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-01-09T15:28:50Z","cross_cats_sorted":[],"title_canon_sha256":"461c8a537775cf61e74b171bd69b70af8c7421c3d542f0d383c4fb5655a808e5","abstract_canon_sha256":"88bc3918256595edfb98d2fdb4b23b7acfb50d288aaaf2abdbae9a3f6ad863e8"},"schema_version":"1.0"},"canonical_sha256":"f278b812b15472827134745f17242e0e653b845f8062f2b939f2a3c9f369cc47","source":{"kind":"arxiv","id":"1201.1800","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.1800","created_at":"2026-05-18T04:04:55Z"},{"alias_kind":"arxiv_version","alias_value":"1201.1800v1","created_at":"2026-05-18T04:04:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.1800","created_at":"2026-05-18T04:04:55Z"},{"alias_kind":"pith_short_12","alias_value":"6J4LQEVRKRZI","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"6J4LQEVRKRZIE4JU","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"6J4LQEVR","created_at":"2026-05-18T12:26:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:6J4LQEVRKRZIE4JUORPROJBOBZ","target":"record","payload":{"canonical_record":{"source":{"id":"1201.1800","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-01-09T15:28:50Z","cross_cats_sorted":[],"title_canon_sha256":"461c8a537775cf61e74b171bd69b70af8c7421c3d542f0d383c4fb5655a808e5","abstract_canon_sha256":"88bc3918256595edfb98d2fdb4b23b7acfb50d288aaaf2abdbae9a3f6ad863e8"},"schema_version":"1.0"},"canonical_sha256":"f278b812b15472827134745f17242e0e653b845f8062f2b939f2a3c9f369cc47","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:04:55.708517Z","signature_b64":"R1Ju38D5uw6W7KFtegyj2Vh5yjneGhNtQWhfOCnof9gO3yh5iKwzASGS7LpQM8dsJCokVOTvBAsSdDwQgyzADw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f278b812b15472827134745f17242e0e653b845f8062f2b939f2a3c9f369cc47","last_reissued_at":"2026-05-18T04:04:55.707856Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:04:55.707856Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1201.1800","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":"2026-05-18T04:04:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0kJvfdnwFzueUDYTdj9NsevrxQ/tlcwimQelBr4GCIMyPNuNNhvYVExplKTwf39iRvUD++HMcoaqeB2WMqoaCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T17:56:14.710079Z"},"content_sha256":"70a418b61efebe03289b544301f4a8e1795b25c3f10d3cf074a828056593b96b","schema_version":"1.0","event_id":"sha256:70a418b61efebe03289b544301f4a8e1795b25c3f10d3cf074a828056593b96b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:6J4LQEVRKRZIE4JUORPROJBOBZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"SHARDS: Survey for High-z Absorption Red & Dead Sources","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"2), (2) The University of Arizona), Antonio Cava (1), Pablo G. P\\'erez-Gonz\\'alez (1, the SHARDS Team ((1) Universidad Complutense de Madrid","submitted_at":"2012-01-09T15:28:50Z","abstract_excerpt":"SHARDS, an ESO/GTC Large Program, is an ultra-deep (26.5 mag) spectro-photometric survey with GTC/OSIRIS designed to select and study massive passively evolving galaxies at z=1.0-2.3 in the GOODS-N field using a set of 24 medium-band filters (FWHM~17 nm) covering the 500-950 nm spectral range. Our observing strategy has been planned to detect, for z>1 sources, the prominent Mg absorption feature (at rest-frame ~280 nm), a distinctive, necessary, and sufficient feature of evolved stellar populations (older than 0.5 Gyr). These observations are being used to: (1) derive for the first time an unb"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.1800","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":"2026-05-18T04:04:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MEvmYWCgDjYci0Ux99dpO99hb6Sr79rltXb7mv6ZPtx3kndOTy9+8bhGziwnZJr5ey3K+JRiekVXFjuiM18OBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T17:56:14.710448Z"},"content_sha256":"90e402c4a762d9eb9b22469814df891a2bcdbf0058e304ac29950e2352b56b5e","schema_version":"1.0","event_id":"sha256:90e402c4a762d9eb9b22469814df891a2bcdbf0058e304ac29950e2352b56b5e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6J4LQEVRKRZIE4JUORPROJBOBZ/bundle.json","state_url":"https://pith.science/pith/6J4LQEVRKRZIE4JUORPROJBOBZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6J4LQEVRKRZIE4JUORPROJBOBZ/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":"2026-06-01T17:56:14Z","links":{"resolver":"https://pith.science/pith/6J4LQEVRKRZIE4JUORPROJBOBZ","bundle":"https://pith.science/pith/6J4LQEVRKRZIE4JUORPROJBOBZ/bundle.json","state":"https://pith.science/pith/6J4LQEVRKRZIE4JUORPROJBOBZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6J4LQEVRKRZIE4JUORPROJBOBZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:6J4LQEVRKRZIE4JUORPROJBOBZ","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":"88bc3918256595edfb98d2fdb4b23b7acfb50d288aaaf2abdbae9a3f6ad863e8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-01-09T15:28:50Z","title_canon_sha256":"461c8a537775cf61e74b171bd69b70af8c7421c3d542f0d383c4fb5655a808e5"},"schema_version":"1.0","source":{"id":"1201.1800","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.1800","created_at":"2026-05-18T04:04:55Z"},{"alias_kind":"arxiv_version","alias_value":"1201.1800v1","created_at":"2026-05-18T04:04:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.1800","created_at":"2026-05-18T04:04:55Z"},{"alias_kind":"pith_short_12","alias_value":"6J4LQEVRKRZI","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"6J4LQEVRKRZIE4JU","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"6J4LQEVR","created_at":"2026-05-18T12:26:56Z"}],"graph_snapshots":[{"event_id":"sha256:90e402c4a762d9eb9b22469814df891a2bcdbf0058e304ac29950e2352b56b5e","target":"graph","created_at":"2026-05-18T04:04:55Z","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":"SHARDS, an ESO/GTC Large Program, is an ultra-deep (26.5 mag) spectro-photometric survey with GTC/OSIRIS designed to select and study massive passively evolving galaxies at z=1.0-2.3 in the GOODS-N field using a set of 24 medium-band filters (FWHM~17 nm) covering the 500-950 nm spectral range. Our observing strategy has been planned to detect, for z>1 sources, the prominent Mg absorption feature (at rest-frame ~280 nm), a distinctive, necessary, and sufficient feature of evolved stellar populations (older than 0.5 Gyr). These observations are being used to: (1) derive for the first time an unb","authors_text":"2), (2) The University of Arizona), Antonio Cava (1), Pablo G. P\\'erez-Gonz\\'alez (1, the SHARDS Team ((1) Universidad Complutense de Madrid","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-01-09T15:28:50Z","title":"SHARDS: Survey for High-z Absorption Red & Dead Sources"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.1800","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":"sha256:70a418b61efebe03289b544301f4a8e1795b25c3f10d3cf074a828056593b96b","target":"record","created_at":"2026-05-18T04:04:55Z","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":"88bc3918256595edfb98d2fdb4b23b7acfb50d288aaaf2abdbae9a3f6ad863e8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-01-09T15:28:50Z","title_canon_sha256":"461c8a537775cf61e74b171bd69b70af8c7421c3d542f0d383c4fb5655a808e5"},"schema_version":"1.0","source":{"id":"1201.1800","kind":"arxiv","version":1}},"canonical_sha256":"f278b812b15472827134745f17242e0e653b845f8062f2b939f2a3c9f369cc47","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f278b812b15472827134745f17242e0e653b845f8062f2b939f2a3c9f369cc47","first_computed_at":"2026-05-18T04:04:55.707856Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:04:55.707856Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"R1Ju38D5uw6W7KFtegyj2Vh5yjneGhNtQWhfOCnof9gO3yh5iKwzASGS7LpQM8dsJCokVOTvBAsSdDwQgyzADw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:04:55.708517Z","signed_message":"canonical_sha256_bytes"},"source_id":"1201.1800","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:70a418b61efebe03289b544301f4a8e1795b25c3f10d3cf074a828056593b96b","sha256:90e402c4a762d9eb9b22469814df891a2bcdbf0058e304ac29950e2352b56b5e"],"state_sha256":"4fc26e069140ac71d84482d65e71d20d1149c3156059bba3223e13b3f03b10e9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xKonY5qJBewEIwmiXBbJWXo1CcT/RKv1nxMY96Tzllhw2+hy2dCm9VhKTFnZWTf0CmRSivYFzL2fL0Yjxk8xAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T17:56:14.712393Z","bundle_sha256":"96cbe24468ee8af2981ad1fe140dd021950c1f8c9306af3132cf2057ed6b6d9c"}}