{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:USX6PUYUJ33QFDNHEBKB727OKV","short_pith_number":"pith:USX6PUYU","canonical_record":{"source":{"id":"2507.02022","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2025-07-02T15:02:46Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"efebc0986eb027d41d01812025f69e2835ae83ad047d9c59dc67d94af1d4b84b","abstract_canon_sha256":"a2ba98f59f8e5f743c2b753d91d6bf16408abae53ecb086460baf7e85ca3564b"},"schema_version":"1.0"},"canonical_sha256":"a4afe7d3144ef7028da720541febee5546bc6abd6eca1ddb93289a35c9c7abff","source":{"kind":"arxiv","id":"2507.02022","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.02022","created_at":"2026-07-05T11:34:11Z"},{"alias_kind":"arxiv_version","alias_value":"2507.02022v2","created_at":"2026-07-05T11:34:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.02022","created_at":"2026-07-05T11:34:11Z"},{"alias_kind":"pith_short_12","alias_value":"USX6PUYUJ33Q","created_at":"2026-07-05T11:34:11Z"},{"alias_kind":"pith_short_16","alias_value":"USX6PUYUJ33QFDNH","created_at":"2026-07-05T11:34:11Z"},{"alias_kind":"pith_short_8","alias_value":"USX6PUYU","created_at":"2026-07-05T11:34:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:USX6PUYUJ33QFDNHEBKB727OKV","target":"record","payload":{"canonical_record":{"source":{"id":"2507.02022","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2025-07-02T15:02:46Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"efebc0986eb027d41d01812025f69e2835ae83ad047d9c59dc67d94af1d4b84b","abstract_canon_sha256":"a2ba98f59f8e5f743c2b753d91d6bf16408abae53ecb086460baf7e85ca3564b"},"schema_version":"1.0"},"canonical_sha256":"a4afe7d3144ef7028da720541febee5546bc6abd6eca1ddb93289a35c9c7abff","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:34:11.063882Z","signature_b64":"hBSEBnsMMXTc2ezNLpgF1jtoVnmsmMiob2UDfiYcoibW40zZMnaebt+xy1LSG9+OoX+1jsIZV9i67ytEOk8jDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a4afe7d3144ef7028da720541febee5546bc6abd6eca1ddb93289a35c9c7abff","last_reissued_at":"2026-07-05T11:34:11.063409Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:34:11.063409Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2507.02022","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":"2026-07-05T11:34:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PlZpqRK+KGjZW1vLbIwE7MgkY+IZhoHF1+DolDYTKd4JPrpgY6/EcAsYJLC6bbIn6GXyFyuWHF+0YXl4nPRNAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T06:12:31.987253Z"},"content_sha256":"07a3aebf6c9e85785fa760aa3e94e149943c790f5d5d961e8ad6a44058a45e7a","schema_version":"1.0","event_id":"sha256:07a3aebf6c9e85785fa760aa3e94e149943c790f5d5d961e8ad6a44058a45e7a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:USX6PUYUJ33QFDNHEBKB727OKV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"$K_s$-band photometry of the Extreme T Subdwarf CWISE J221706.28$-$145437.6","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, Jerry Jun-Yan Zhang, Nicolas Lodieu","submitted_at":"2025-07-02T15:02:46Z","abstract_excerpt":"We present deep $K_s$-band imaging of the extreme T subdwarf CWISE J221706.28$-$145437.6. Using the new photometry, we construct its spectral energy distribution and find this object exhibits exceptionally strong collision-induced absorption in the $H$ and $K$ bands. The comparison with the nearest benchmark extreme T subdwarf WISEA J181006.18$-$101000.5 suggests the object would be cooler and more metal-poor than the benchmark."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.02022","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2507.02022/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":"2026-07-05T11:34:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AlW/RyabBIk3aeapxUxUs4IMPVn6milh5lthvDg2XKlPjdgj2IGNnR42TuO75o3KqCO6sYTHhO0HU2/ytYZ1Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T06:12:31.987763Z"},"content_sha256":"d8f97015d144ee1bc1028ef7230a66a4431449fba11b8344c72a8e3f1e07ca5f","schema_version":"1.0","event_id":"sha256:d8f97015d144ee1bc1028ef7230a66a4431449fba11b8344c72a8e3f1e07ca5f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/USX6PUYUJ33QFDNHEBKB727OKV/bundle.json","state_url":"https://pith.science/pith/USX6PUYUJ33QFDNHEBKB727OKV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/USX6PUYUJ33QFDNHEBKB727OKV/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":"2026-08-07T06:12:31Z","links":{"resolver":"https://pith.science/pith/USX6PUYUJ33QFDNHEBKB727OKV","bundle":"https://pith.science/pith/USX6PUYUJ33QFDNHEBKB727OKV/bundle.json","state":"https://pith.science/pith/USX6PUYUJ33QFDNHEBKB727OKV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/USX6PUYUJ33QFDNHEBKB727OKV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:USX6PUYUJ33QFDNHEBKB727OKV","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":"a2ba98f59f8e5f743c2b753d91d6bf16408abae53ecb086460baf7e85ca3564b","cross_cats_sorted":["astro-ph.EP"],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2025-07-02T15:02:46Z","title_canon_sha256":"efebc0986eb027d41d01812025f69e2835ae83ad047d9c59dc67d94af1d4b84b"},"schema_version":"1.0","source":{"id":"2507.02022","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.02022","created_at":"2026-07-05T11:34:11Z"},{"alias_kind":"arxiv_version","alias_value":"2507.02022v2","created_at":"2026-07-05T11:34:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.02022","created_at":"2026-07-05T11:34:11Z"},{"alias_kind":"pith_short_12","alias_value":"USX6PUYUJ33Q","created_at":"2026-07-05T11:34:11Z"},{"alias_kind":"pith_short_16","alias_value":"USX6PUYUJ33QFDNH","created_at":"2026-07-05T11:34:11Z"},{"alias_kind":"pith_short_8","alias_value":"USX6PUYU","created_at":"2026-07-05T11:34:11Z"}],"graph_snapshots":[{"event_id":"sha256:d8f97015d144ee1bc1028ef7230a66a4431449fba11b8344c72a8e3f1e07ca5f","target":"graph","created_at":"2026-07-05T11:34:11Z","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/2507.02022/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present deep $K_s$-band imaging of the extreme T subdwarf CWISE J221706.28$-$145437.6. Using the new photometry, we construct its spectral energy distribution and find this object exhibits exceptionally strong collision-induced absorption in the $H$ and $K$ bands. The comparison with the nearest benchmark extreme T subdwarf WISEA J181006.18$-$101000.5 suggests the object would be cooler and more metal-poor than the benchmark.","authors_text":"Eduardo L. Mart\\'in, Jerry Jun-Yan Zhang, Nicolas Lodieu","cross_cats":["astro-ph.EP"],"headline":"","license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2025-07-02T15:02:46Z","title":"$K_s$-band photometry of the Extreme T Subdwarf CWISE J221706.28$-$145437.6"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.02022","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":"sha256:07a3aebf6c9e85785fa760aa3e94e149943c790f5d5d961e8ad6a44058a45e7a","target":"record","created_at":"2026-07-05T11:34:11Z","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":"a2ba98f59f8e5f743c2b753d91d6bf16408abae53ecb086460baf7e85ca3564b","cross_cats_sorted":["astro-ph.EP"],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2025-07-02T15:02:46Z","title_canon_sha256":"efebc0986eb027d41d01812025f69e2835ae83ad047d9c59dc67d94af1d4b84b"},"schema_version":"1.0","source":{"id":"2507.02022","kind":"arxiv","version":2}},"canonical_sha256":"a4afe7d3144ef7028da720541febee5546bc6abd6eca1ddb93289a35c9c7abff","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a4afe7d3144ef7028da720541febee5546bc6abd6eca1ddb93289a35c9c7abff","first_computed_at":"2026-07-05T11:34:11.063409Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:34:11.063409Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hBSEBnsMMXTc2ezNLpgF1jtoVnmsmMiob2UDfiYcoibW40zZMnaebt+xy1LSG9+OoX+1jsIZV9i67ytEOk8jDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T11:34:11.063882Z","signed_message":"canonical_sha256_bytes"},"source_id":"2507.02022","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:07a3aebf6c9e85785fa760aa3e94e149943c790f5d5d961e8ad6a44058a45e7a","sha256:d8f97015d144ee1bc1028ef7230a66a4431449fba11b8344c72a8e3f1e07ca5f"],"state_sha256":"5ce870bb515b7286b88bdbc3a796007be8574c9cedf8b1ddda14ee6f5ed14ed7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YnECbbKaYsLiWsA/ZNdVvjY0cXLZu69aKbzJKcluUJCNmddCp68ufHMBQ64lPSCkL7us3/KsnmwrXQ2Z/yvMBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T06:12:31.991639Z","bundle_sha256":"de5a22f3a6069972c201d4f2d45f60426f1957554af5bc64dc47e4e3b8f28166"}}