{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:6WOT4CTDDIZKFVPS34YOL5X3R3","short_pith_number":"pith:6WOT4CTD","canonical_record":{"source":{"id":"2502.13887","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-02-19T17:18:01Z","cross_cats_sorted":[],"title_canon_sha256":"aa751a6e690fbcb9ef67eb79384cc5d66c1eb2831a4d7e0006c6fac72aab2c95","abstract_canon_sha256":"ddf58411b7c719f169ff1146c2e68ee4e9b87e4558f6390f19dcba1ecc2e62dc"},"schema_version":"1.0"},"canonical_sha256":"f59d3e0a631a32a2d5f2df30e5f6fb8eef03d530a4853637bcd99d146378a84b","source":{"kind":"arxiv","id":"2502.13887","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.13887","created_at":"2026-07-05T10:17:02Z"},{"alias_kind":"arxiv_version","alias_value":"2502.13887v1","created_at":"2026-07-05T10:17:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.13887","created_at":"2026-07-05T10:17:02Z"},{"alias_kind":"pith_short_12","alias_value":"6WOT4CTDDIZK","created_at":"2026-07-05T10:17:02Z"},{"alias_kind":"pith_short_16","alias_value":"6WOT4CTDDIZKFVPS","created_at":"2026-07-05T10:17:02Z"},{"alias_kind":"pith_short_8","alias_value":"6WOT4CTD","created_at":"2026-07-05T10:17:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:6WOT4CTDDIZKFVPS34YOL5X3R3","target":"record","payload":{"canonical_record":{"source":{"id":"2502.13887","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-02-19T17:18:01Z","cross_cats_sorted":[],"title_canon_sha256":"aa751a6e690fbcb9ef67eb79384cc5d66c1eb2831a4d7e0006c6fac72aab2c95","abstract_canon_sha256":"ddf58411b7c719f169ff1146c2e68ee4e9b87e4558f6390f19dcba1ecc2e62dc"},"schema_version":"1.0"},"canonical_sha256":"f59d3e0a631a32a2d5f2df30e5f6fb8eef03d530a4853637bcd99d146378a84b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:17:02.110467Z","signature_b64":"5JwIQedFpQKTNa1Q6lRO2Pkxor/O41bEt5zRGeP8zQEzb12wNw4N76kg2mmByuafkLiR/r7iSBbNbz/sEQHgCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f59d3e0a631a32a2d5f2df30e5f6fb8eef03d530a4853637bcd99d146378a84b","last_reissued_at":"2026-07-05T10:17:02.110107Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:17:02.110107Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2502.13887","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":"2026-07-05T10:17:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0brKHxW7PnjlrfKyAkuTKYzcJ2ODdWEs4jepYt+3A/ElNcJFg0/tur6Mo4AjUKC0jN6+V/SzwULOyV8pCZFKDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T13:27:34.636876Z"},"content_sha256":"bd6b51bac2a0b3f10d9cf343601ab99b2a725bf386da5dc6fe4aaa45ad386ecb","schema_version":"1.0","event_id":"sha256:bd6b51bac2a0b3f10d9cf343601ab99b2a725bf386da5dc6fe4aaa45ad386ecb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:6WOT4CTDDIZKFVPS34YOL5X3R3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The JWST Resolved Stellar Populations Early Release Science Program. VIII. The Spatially Resolved Star Formation History of WLM","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alessandro Savino, Alyson M. Brooks, Andrew A. Cole, Andrew E. Dolphin, Benjamin F. Williams, Christopher T. Garling, Daniel R. Weisz, Evan D. Skillman, Jack T. Warfield, Jason S. Kalirai, Jay Anderson, Karoline M. Gilbert, Kristen B. W. McQuinn, Mario Gennaro, Marla C. Geha, Martha L. Boyer, Matteo Correnti, Max J. B. Newman, Nitya Kallivayalil, Roger E. Cohen","submitted_at":"2025-02-19T17:18:01Z","abstract_excerpt":"We measure radial stellar age gradients in the relatively isolated gas-rich dwarf irregular WLM, combining JWST NIRCam and NIRISS imaging with six archival Hubble fields over semi-major axis equivalent distances of 0$\\lesssim$R$_{SMA}$$\\lesssim$4 kpc ($\\lesssim$3R$_{hl}$). Fitting lifetime star formation histories (SFHs) to resolved color-magnitude diagrams (CMDs), radial age gradients are quantified using $\\tau_{90}$ and $\\tau_{50}$, the lookback times to form 90\\% and 50\\% of the cumulative stellar mass. We find that globally, the outskirts of WLM are older on average, with ($\\delta$$\\tau_{9"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.13887","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/2502.13887/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":"2026-07-05T10:17:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xDcqEJGhg8eA6Cg1uK0mZqJ9BX9QaooLngdg5RHl1TeQMTUdP/B2I2lTK/p2JROL0WfDmCDWkGYZkKny0hqxDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T13:27:34.637405Z"},"content_sha256":"1ba2b4ea18002d97e3f882d5dd089303b917f4b230dd9e6338818081b05a06bf","schema_version":"1.0","event_id":"sha256:1ba2b4ea18002d97e3f882d5dd089303b917f4b230dd9e6338818081b05a06bf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6WOT4CTDDIZKFVPS34YOL5X3R3/bundle.json","state_url":"https://pith.science/pith/6WOT4CTDDIZKFVPS34YOL5X3R3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6WOT4CTDDIZKFVPS34YOL5X3R3/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":"2026-08-11T13:27:34Z","links":{"resolver":"https://pith.science/pith/6WOT4CTDDIZKFVPS34YOL5X3R3","bundle":"https://pith.science/pith/6WOT4CTDDIZKFVPS34YOL5X3R3/bundle.json","state":"https://pith.science/pith/6WOT4CTDDIZKFVPS34YOL5X3R3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6WOT4CTDDIZKFVPS34YOL5X3R3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:6WOT4CTDDIZKFVPS34YOL5X3R3","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":"ddf58411b7c719f169ff1146c2e68ee4e9b87e4558f6390f19dcba1ecc2e62dc","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-02-19T17:18:01Z","title_canon_sha256":"aa751a6e690fbcb9ef67eb79384cc5d66c1eb2831a4d7e0006c6fac72aab2c95"},"schema_version":"1.0","source":{"id":"2502.13887","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.13887","created_at":"2026-07-05T10:17:02Z"},{"alias_kind":"arxiv_version","alias_value":"2502.13887v1","created_at":"2026-07-05T10:17:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.13887","created_at":"2026-07-05T10:17:02Z"},{"alias_kind":"pith_short_12","alias_value":"6WOT4CTDDIZK","created_at":"2026-07-05T10:17:02Z"},{"alias_kind":"pith_short_16","alias_value":"6WOT4CTDDIZKFVPS","created_at":"2026-07-05T10:17:02Z"},{"alias_kind":"pith_short_8","alias_value":"6WOT4CTD","created_at":"2026-07-05T10:17:02Z"}],"graph_snapshots":[{"event_id":"sha256:1ba2b4ea18002d97e3f882d5dd089303b917f4b230dd9e6338818081b05a06bf","target":"graph","created_at":"2026-07-05T10:17:02Z","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/2502.13887/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We measure radial stellar age gradients in the relatively isolated gas-rich dwarf irregular WLM, combining JWST NIRCam and NIRISS imaging with six archival Hubble fields over semi-major axis equivalent distances of 0$\\lesssim$R$_{SMA}$$\\lesssim$4 kpc ($\\lesssim$3R$_{hl}$). Fitting lifetime star formation histories (SFHs) to resolved color-magnitude diagrams (CMDs), radial age gradients are quantified using $\\tau_{90}$ and $\\tau_{50}$, the lookback times to form 90\\% and 50\\% of the cumulative stellar mass. We find that globally, the outskirts of WLM are older on average, with ($\\delta$$\\tau_{9","authors_text":"Alessandro Savino, Alyson M. Brooks, Andrew A. Cole, Andrew E. Dolphin, Benjamin F. Williams, Christopher T. Garling, Daniel R. Weisz, Evan D. Skillman, Jack T. Warfield, Jason S. Kalirai, Jay Anderson, Karoline M. Gilbert, Kristen B. W. McQuinn, Mario Gennaro, Marla C. Geha, Martha L. Boyer, Matteo Correnti, Max J. B. Newman, Nitya Kallivayalil, Roger E. Cohen","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-02-19T17:18:01Z","title":"The JWST Resolved Stellar Populations Early Release Science Program. VIII. The Spatially Resolved Star Formation History of WLM"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.13887","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:bd6b51bac2a0b3f10d9cf343601ab99b2a725bf386da5dc6fe4aaa45ad386ecb","target":"record","created_at":"2026-07-05T10:17:02Z","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":"ddf58411b7c719f169ff1146c2e68ee4e9b87e4558f6390f19dcba1ecc2e62dc","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-02-19T17:18:01Z","title_canon_sha256":"aa751a6e690fbcb9ef67eb79384cc5d66c1eb2831a4d7e0006c6fac72aab2c95"},"schema_version":"1.0","source":{"id":"2502.13887","kind":"arxiv","version":1}},"canonical_sha256":"f59d3e0a631a32a2d5f2df30e5f6fb8eef03d530a4853637bcd99d146378a84b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f59d3e0a631a32a2d5f2df30e5f6fb8eef03d530a4853637bcd99d146378a84b","first_computed_at":"2026-07-05T10:17:02.110107Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:17:02.110107Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5JwIQedFpQKTNa1Q6lRO2Pkxor/O41bEt5zRGeP8zQEzb12wNw4N76kg2mmByuafkLiR/r7iSBbNbz/sEQHgCA==","signature_status":"signed_v1","signed_at":"2026-07-05T10:17:02.110467Z","signed_message":"canonical_sha256_bytes"},"source_id":"2502.13887","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bd6b51bac2a0b3f10d9cf343601ab99b2a725bf386da5dc6fe4aaa45ad386ecb","sha256:1ba2b4ea18002d97e3f882d5dd089303b917f4b230dd9e6338818081b05a06bf"],"state_sha256":"e5638f6c1e7857b4debdc28913f3fba0d01bcc87560beb2b628342aa43b9e454"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+cNjsKBJI0MjQqvbhkeHBo7T+eiIj+SfazdflWKkePdIweI+hMsBpjnMVc0Idy8AMKRN4GdWhu4UUhT6D63KBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T13:27:34.641586Z","bundle_sha256":"acb9585688fc958c540f1bf18cb2c564a664d4423611a19cb22455d7f93d26aa"}}