{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:6QZK4J4FNNKXVNVBTFT7IOZWSS","short_pith_number":"pith:6QZK4J4F","canonical_record":{"source":{"id":"2403.12464","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-03-19T05:45:27Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"78609de148af52d0adead7b6af52d6d813ee5070d5202c35aca9777e3a619e03","abstract_canon_sha256":"c1fe43073cde8155aeadb72312cba117773846bec9922b87ea6bae03bab67db5"},"schema_version":"1.0"},"canonical_sha256":"f432ae27856b557ab6a19967f43b3694a8705af3864bc66a1fe3d506cd216a4b","source":{"kind":"arxiv","id":"2403.12464","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2403.12464","created_at":"2026-07-05T07:58:01Z"},{"alias_kind":"arxiv_version","alias_value":"2403.12464v1","created_at":"2026-07-05T07:58:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2403.12464","created_at":"2026-07-05T07:58:01Z"},{"alias_kind":"pith_short_12","alias_value":"6QZK4J4FNNKX","created_at":"2026-07-05T07:58:01Z"},{"alias_kind":"pith_short_16","alias_value":"6QZK4J4FNNKXVNVB","created_at":"2026-07-05T07:58:01Z"},{"alias_kind":"pith_short_8","alias_value":"6QZK4J4F","created_at":"2026-07-05T07:58:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:6QZK4J4FNNKXVNVBTFT7IOZWSS","target":"record","payload":{"canonical_record":{"source":{"id":"2403.12464","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-03-19T05:45:27Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"78609de148af52d0adead7b6af52d6d813ee5070d5202c35aca9777e3a619e03","abstract_canon_sha256":"c1fe43073cde8155aeadb72312cba117773846bec9922b87ea6bae03bab67db5"},"schema_version":"1.0"},"canonical_sha256":"f432ae27856b557ab6a19967f43b3694a8705af3864bc66a1fe3d506cd216a4b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:58:01.927082Z","signature_b64":"UkR6TvA2IVwoYGUocU0wYGvn2oAdnAKJ3rNLKea81sYAb/cCCEavF/QwVdk/YQhfEMXWTflQLXO8UfQEyDHgAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f432ae27856b557ab6a19967f43b3694a8705af3864bc66a1fe3d506cd216a4b","last_reissued_at":"2026-07-05T07:58:01.926562Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:58:01.926562Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2403.12464","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":"2026-07-05T07:58:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FqfmgvkRq/Fkqsa9k/ViuvXUM8vlKrs42cBS91WSF7BiRHKOMzsZjPaaVzxJdzB/FtQCMGnXAOLk1lKXK2vjAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T09:05:09.666694Z"},"content_sha256":"b5ad99bc90fc56946f8f5e2436063c03775d1016ab618a1cafa26c53f0a6fcc6","schema_version":"1.0","event_id":"sha256:b5ad99bc90fc56946f8f5e2436063c03775d1016ab618a1cafa26c53f0a6fcc6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:6QZK4J4FNNKXVNVBTFT7IOZWSS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical properties of Y dwarfs observed with the Gran Telescopio Canarias","license":"http://creativecommons.org/publicdomain/zero/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.SR","authors_text":"Eduardo L. Mart\\'in, Honorio Lanchas, Jerry J.-Y. Zhang, Nicolas Lodieu, Tarik Shahbaz, Yakiv V. Pavlenko","submitted_at":"2024-03-19T05:45:27Z","abstract_excerpt":"Observations of five Y dwarfs with three optical and near-infrared instruments at the 10.4 m Gran Telescopio Canarias are reported. Deep images of the five targets and a low-resolution far-red optical spectrum for one of the targets were obtained. One of the Y dwarfs, WISE J173835+273258 (Y0), was clearly detected in the optical (z- and i-bands) and another, WISE J182831+265037 (Y2), was detected only in the z-band. We measured the colours of our targets and found that the z-J and i-z colours of the Y dwarfs are bluer than those of mid- and late-T dwarfs. This optical blueing has been predicte"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2403.12464","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/2403.12464/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":"2026-07-05T07:58:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PdcjBF0QfRSDcxLoGKbgLQGP/A6gmUBpA3KtTlE+6D1PFhxr3K11sQ4RYs8U3qzvSpMupgpwSTeu84xjG+tQDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T09:05:09.667221Z"},"content_sha256":"b32460b5ca6d670564a1df9ffa3b9eb80f252b835cfec8141e958ce620736c3c","schema_version":"1.0","event_id":"sha256:b32460b5ca6d670564a1df9ffa3b9eb80f252b835cfec8141e958ce620736c3c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6QZK4J4FNNKXVNVBTFT7IOZWSS/bundle.json","state_url":"https://pith.science/pith/6QZK4J4FNNKXVNVBTFT7IOZWSS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6QZK4J4FNNKXVNVBTFT7IOZWSS/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":"2026-08-16T09:05:09Z","links":{"resolver":"https://pith.science/pith/6QZK4J4FNNKXVNVBTFT7IOZWSS","bundle":"https://pith.science/pith/6QZK4J4FNNKXVNVBTFT7IOZWSS/bundle.json","state":"https://pith.science/pith/6QZK4J4FNNKXVNVBTFT7IOZWSS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6QZK4J4FNNKXVNVBTFT7IOZWSS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:6QZK4J4FNNKXVNVBTFT7IOZWSS","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":"c1fe43073cde8155aeadb72312cba117773846bec9922b87ea6bae03bab67db5","cross_cats_sorted":["astro-ph.EP"],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-03-19T05:45:27Z","title_canon_sha256":"78609de148af52d0adead7b6af52d6d813ee5070d5202c35aca9777e3a619e03"},"schema_version":"1.0","source":{"id":"2403.12464","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2403.12464","created_at":"2026-07-05T07:58:01Z"},{"alias_kind":"arxiv_version","alias_value":"2403.12464v1","created_at":"2026-07-05T07:58:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2403.12464","created_at":"2026-07-05T07:58:01Z"},{"alias_kind":"pith_short_12","alias_value":"6QZK4J4FNNKX","created_at":"2026-07-05T07:58:01Z"},{"alias_kind":"pith_short_16","alias_value":"6QZK4J4FNNKXVNVB","created_at":"2026-07-05T07:58:01Z"},{"alias_kind":"pith_short_8","alias_value":"6QZK4J4F","created_at":"2026-07-05T07:58:01Z"}],"graph_snapshots":[{"event_id":"sha256:b32460b5ca6d670564a1df9ffa3b9eb80f252b835cfec8141e958ce620736c3c","target":"graph","created_at":"2026-07-05T07:58:01Z","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/2403.12464/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Observations of five Y dwarfs with three optical and near-infrared instruments at the 10.4 m Gran Telescopio Canarias are reported. Deep images of the five targets and a low-resolution far-red optical spectrum for one of the targets were obtained. One of the Y dwarfs, WISE J173835+273258 (Y0), was clearly detected in the optical (z- and i-bands) and another, WISE J182831+265037 (Y2), was detected only in the z-band. We measured the colours of our targets and found that the z-J and i-z colours of the Y dwarfs are bluer than those of mid- and late-T dwarfs. This optical blueing has been predicte","authors_text":"Eduardo L. Mart\\'in, Honorio Lanchas, Jerry J.-Y. Zhang, Nicolas Lodieu, Tarik Shahbaz, Yakiv V. Pavlenko","cross_cats":["astro-ph.EP"],"headline":"","license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-03-19T05:45:27Z","title":"Optical properties of Y dwarfs observed with the Gran Telescopio Canarias"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2403.12464","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:b5ad99bc90fc56946f8f5e2436063c03775d1016ab618a1cafa26c53f0a6fcc6","target":"record","created_at":"2026-07-05T07:58:01Z","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":"c1fe43073cde8155aeadb72312cba117773846bec9922b87ea6bae03bab67db5","cross_cats_sorted":["astro-ph.EP"],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-03-19T05:45:27Z","title_canon_sha256":"78609de148af52d0adead7b6af52d6d813ee5070d5202c35aca9777e3a619e03"},"schema_version":"1.0","source":{"id":"2403.12464","kind":"arxiv","version":1}},"canonical_sha256":"f432ae27856b557ab6a19967f43b3694a8705af3864bc66a1fe3d506cd216a4b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f432ae27856b557ab6a19967f43b3694a8705af3864bc66a1fe3d506cd216a4b","first_computed_at":"2026-07-05T07:58:01.926562Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:58:01.926562Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UkR6TvA2IVwoYGUocU0wYGvn2oAdnAKJ3rNLKea81sYAb/cCCEavF/QwVdk/YQhfEMXWTflQLXO8UfQEyDHgAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T07:58:01.927082Z","signed_message":"canonical_sha256_bytes"},"source_id":"2403.12464","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b5ad99bc90fc56946f8f5e2436063c03775d1016ab618a1cafa26c53f0a6fcc6","sha256:b32460b5ca6d670564a1df9ffa3b9eb80f252b835cfec8141e958ce620736c3c"],"state_sha256":"958a7a28cbdca96ccd971dae904ebdd2be538327525975696bc0108d41f32642"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GDFACO1OormnNB+bUFx2deuJPmW0uHZk0yOw4HPKWVY6PFFX741cJTue49H1BhUErnUcsU+tHfLsv7fXRkoqCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T09:05:09.670803Z","bundle_sha256":"fe7bf5fa339ef324618e1cbdf7acbfc03a48ca429dec724ef2f9370b120a8f0f"}}