{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:F6RBAC3GFVK63YUM6LTSVSCV4W","short_pith_number":"pith:F6RBAC3G","canonical_record":{"source":{"id":"2606.22818","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2026-06-22T03:46:45Z","cross_cats_sorted":[],"title_canon_sha256":"69b27fe8328dac8dc7824d3c51e0199134eec5f6fede68e7acae5e4808b6026e","abstract_canon_sha256":"7d6ba398c91bebb90a64b4f43b186c974c812830d3d23325ff1f0ca41971c2ec"},"schema_version":"1.0"},"canonical_sha256":"2fa2100b662d55ede28cf2e72ac855e58f36ffc58960806c8d906e0e6e254da0","source":{"kind":"arxiv","id":"2606.22818","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.22818","created_at":"2026-06-23T02:14:00Z"},{"alias_kind":"arxiv_version","alias_value":"2606.22818v1","created_at":"2026-06-23T02:14:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.22818","created_at":"2026-06-23T02:14:00Z"},{"alias_kind":"pith_short_12","alias_value":"F6RBAC3GFVK6","created_at":"2026-06-23T02:14:00Z"},{"alias_kind":"pith_short_16","alias_value":"F6RBAC3GFVK63YUM","created_at":"2026-06-23T02:14:00Z"},{"alias_kind":"pith_short_8","alias_value":"F6RBAC3G","created_at":"2026-06-23T02:14:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:F6RBAC3GFVK63YUM6LTSVSCV4W","target":"record","payload":{"canonical_record":{"source":{"id":"2606.22818","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2026-06-22T03:46:45Z","cross_cats_sorted":[],"title_canon_sha256":"69b27fe8328dac8dc7824d3c51e0199134eec5f6fede68e7acae5e4808b6026e","abstract_canon_sha256":"7d6ba398c91bebb90a64b4f43b186c974c812830d3d23325ff1f0ca41971c2ec"},"schema_version":"1.0"},"canonical_sha256":"2fa2100b662d55ede28cf2e72ac855e58f36ffc58960806c8d906e0e6e254da0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-23T02:14:00.294366Z","signature_b64":"pKreuoLU+NgnhDrHKt6cvp7BTM+D+Pr6kxNvus2IgsTE8oybcEDi17Dzl5NLdsMJaRtv872kdAf/i2qSq4UYAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2fa2100b662d55ede28cf2e72ac855e58f36ffc58960806c8d906e0e6e254da0","last_reissued_at":"2026-06-23T02:14:00.293816Z","signature_status":"signed_v1","first_computed_at":"2026-06-23T02:14:00.293816Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.22818","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":"2026-06-23T02:14:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2HM+ZRLfWkr7hwkKO/+7K9kczEdJrskBNe91jqGHHO3mmuxq7pI+gZgtkK/itg3HMHCIl5Q6KSrh2huum9LcCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T19:18:25.639703Z"},"content_sha256":"164e1e4ed9bbc362e56e6f9f6d88bb194dae3f938e02904c0554b7771b87d984","schema_version":"1.0","event_id":"sha256:164e1e4ed9bbc362e56e6f9f6d88bb194dae3f938e02904c0554b7771b87d984"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:F6RBAC3GFVK63YUM6LTSVSCV4W","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Surface brightness-color relations for red giant branch stars: Observational constraints on metallicity effects using the ARD method","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Chao Liu, Jianping Xiong, Jiao Li, Qiyuan Cheng, Xiaobin Zhang, Xiaodian Chen, Xuefei Chen, Zhanwen Han","submitted_at":"2026-06-22T03:46:45Z","abstract_excerpt":"Aims: We aim to quantify the metallicity dependence of the SBCR for red giant branch (RGB) stars and to test the robustness of the relation using asteroseismic radii, Gaia distances, and atmospheric parameters from APOGEE. Methods: We selected more than 2,000 RGB stars from APOKASC-3 to calibrate and validate the SBCR. Johnson V magnitudes were synthesized from Gaia XP spectra and homogenized to widely used SBCR photometric systems, while K_s photometry was taken from 2MASS. Angular diameters derived from asteroseismic radii and Gaia distances (ARD) were used to construct the SBCR. We explored"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.22818","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/2606.22818/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":"2026-06-23T02:14:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yipOE03CVO/0neQHlNzo6naUsKPeozPEOUjCNPco0elZD8LE6ih411e7AZY/+ZMzkd2IXU6mpDmgWnyPmUjuDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T19:18:25.640079Z"},"content_sha256":"0ed270d3cf3c7cefb37490aabb0ab2c27f357a18e4c414981563a4359213f596","schema_version":"1.0","event_id":"sha256:0ed270d3cf3c7cefb37490aabb0ab2c27f357a18e4c414981563a4359213f596"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/F6RBAC3GFVK63YUM6LTSVSCV4W/bundle.json","state_url":"https://pith.science/pith/F6RBAC3GFVK63YUM6LTSVSCV4W/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/F6RBAC3GFVK63YUM6LTSVSCV4W/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":"2026-06-27T19:18:25Z","links":{"resolver":"https://pith.science/pith/F6RBAC3GFVK63YUM6LTSVSCV4W","bundle":"https://pith.science/pith/F6RBAC3GFVK63YUM6LTSVSCV4W/bundle.json","state":"https://pith.science/pith/F6RBAC3GFVK63YUM6LTSVSCV4W/state.json","well_known_bundle":"https://pith.science/.well-known/pith/F6RBAC3GFVK63YUM6LTSVSCV4W/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:F6RBAC3GFVK63YUM6LTSVSCV4W","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":"7d6ba398c91bebb90a64b4f43b186c974c812830d3d23325ff1f0ca41971c2ec","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2026-06-22T03:46:45Z","title_canon_sha256":"69b27fe8328dac8dc7824d3c51e0199134eec5f6fede68e7acae5e4808b6026e"},"schema_version":"1.0","source":{"id":"2606.22818","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.22818","created_at":"2026-06-23T02:14:00Z"},{"alias_kind":"arxiv_version","alias_value":"2606.22818v1","created_at":"2026-06-23T02:14:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.22818","created_at":"2026-06-23T02:14:00Z"},{"alias_kind":"pith_short_12","alias_value":"F6RBAC3GFVK6","created_at":"2026-06-23T02:14:00Z"},{"alias_kind":"pith_short_16","alias_value":"F6RBAC3GFVK63YUM","created_at":"2026-06-23T02:14:00Z"},{"alias_kind":"pith_short_8","alias_value":"F6RBAC3G","created_at":"2026-06-23T02:14:00Z"}],"graph_snapshots":[{"event_id":"sha256:0ed270d3cf3c7cefb37490aabb0ab2c27f357a18e4c414981563a4359213f596","target":"graph","created_at":"2026-06-23T02:14:00Z","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/2606.22818/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Aims: We aim to quantify the metallicity dependence of the SBCR for red giant branch (RGB) stars and to test the robustness of the relation using asteroseismic radii, Gaia distances, and atmospheric parameters from APOGEE. Methods: We selected more than 2,000 RGB stars from APOKASC-3 to calibrate and validate the SBCR. Johnson V magnitudes were synthesized from Gaia XP spectra and homogenized to widely used SBCR photometric systems, while K_s photometry was taken from 2MASS. Angular diameters derived from asteroseismic radii and Gaia distances (ARD) were used to construct the SBCR. We explored","authors_text":"Chao Liu, Jianping Xiong, Jiao Li, Qiyuan Cheng, Xiaobin Zhang, Xiaodian Chen, Xuefei Chen, Zhanwen Han","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2026-06-22T03:46:45Z","title":"Surface brightness-color relations for red giant branch stars: Observational constraints on metallicity effects using the ARD method"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.22818","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":"sha256:164e1e4ed9bbc362e56e6f9f6d88bb194dae3f938e02904c0554b7771b87d984","target":"record","created_at":"2026-06-23T02:14:00Z","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":"7d6ba398c91bebb90a64b4f43b186c974c812830d3d23325ff1f0ca41971c2ec","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2026-06-22T03:46:45Z","title_canon_sha256":"69b27fe8328dac8dc7824d3c51e0199134eec5f6fede68e7acae5e4808b6026e"},"schema_version":"1.0","source":{"id":"2606.22818","kind":"arxiv","version":1}},"canonical_sha256":"2fa2100b662d55ede28cf2e72ac855e58f36ffc58960806c8d906e0e6e254da0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2fa2100b662d55ede28cf2e72ac855e58f36ffc58960806c8d906e0e6e254da0","first_computed_at":"2026-06-23T02:14:00.293816Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-23T02:14:00.293816Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pKreuoLU+NgnhDrHKt6cvp7BTM+D+Pr6kxNvus2IgsTE8oybcEDi17Dzl5NLdsMJaRtv872kdAf/i2qSq4UYAQ==","signature_status":"signed_v1","signed_at":"2026-06-23T02:14:00.294366Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.22818","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:164e1e4ed9bbc362e56e6f9f6d88bb194dae3f938e02904c0554b7771b87d984","sha256:0ed270d3cf3c7cefb37490aabb0ab2c27f357a18e4c414981563a4359213f596"],"state_sha256":"c906cbab4ec1235bda0031072909d803a1eebd96ee6c3cad245a5573170d0070"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6e9+sOHaXQrLPYV3VO3mNaX49SPzsulLE18uwTxhpoUTq0+AVsdqwhXdI20hodZxl+Qo42IExbmnhgB/jwhCCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T19:18:25.642099Z","bundle_sha256":"203957bc7529941c577ad277f9c6b5ddbd73fd0d075903b8dd32ce92d187a213"}}