{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:EDTN2MIM5HPGV4ORE544TNXT2Z","short_pith_number":"pith:EDTN2MIM","canonical_record":{"source":{"id":"2504.16201","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-04-22T18:47:58Z","cross_cats_sorted":[],"title_canon_sha256":"1316190de46037d6d49087c6e64dddb316ee3657ac1366eabbf95517ee2cb57d","abstract_canon_sha256":"3340304e8371c37fcc28b62267a342808eabe959e942bbe9f6123b8e01250942"},"schema_version":"1.0"},"canonical_sha256":"20e6dd310ce9de6af1d12779c9b6f3d65e113404e9b945e3d7cc3f713b31a789","source":{"kind":"arxiv","id":"2504.16201","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.16201","created_at":"2026-07-05T10:52:43Z"},{"alias_kind":"arxiv_version","alias_value":"2504.16201v1","created_at":"2026-07-05T10:52:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.16201","created_at":"2026-07-05T10:52:43Z"},{"alias_kind":"pith_short_12","alias_value":"EDTN2MIM5HPG","created_at":"2026-07-05T10:52:43Z"},{"alias_kind":"pith_short_16","alias_value":"EDTN2MIM5HPGV4OR","created_at":"2026-07-05T10:52:43Z"},{"alias_kind":"pith_short_8","alias_value":"EDTN2MIM","created_at":"2026-07-05T10:52:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:EDTN2MIM5HPGV4ORE544TNXT2Z","target":"record","payload":{"canonical_record":{"source":{"id":"2504.16201","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-04-22T18:47:58Z","cross_cats_sorted":[],"title_canon_sha256":"1316190de46037d6d49087c6e64dddb316ee3657ac1366eabbf95517ee2cb57d","abstract_canon_sha256":"3340304e8371c37fcc28b62267a342808eabe959e942bbe9f6123b8e01250942"},"schema_version":"1.0"},"canonical_sha256":"20e6dd310ce9de6af1d12779c9b6f3d65e113404e9b945e3d7cc3f713b31a789","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:52:43.147263Z","signature_b64":"HGA+5Mpd31aujV2mS0n51AJa/wdGcYi3+qcPshWf3k/zXz6t5GuMHzHIiTOzN4kpJj3mCy7vl6L/t3M43LnnDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"20e6dd310ce9de6af1d12779c9b6f3d65e113404e9b945e3d7cc3f713b31a789","last_reissued_at":"2026-07-05T10:52:43.146843Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:52:43.146843Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2504.16201","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":"2026-07-05T10:52:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o/B7dWAryGB1M1SihVfhVB4SIWnvitTewXDKIQmWGglYepBUGz2o1Q76XZkBQDv2YDRoLR/t1UdaGlObsGGKAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T17:57:42.330178Z"},"content_sha256":"3a29e256dc0ccfd3c3543bdf395bebd90f27f168ef507629af5b98c3cb6d0d6e","schema_version":"1.0","event_id":"sha256:3a29e256dc0ccfd3c3543bdf395bebd90f27f168ef507629af5b98c3cb6d0d6e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:EDTN2MIM5HPGV4ORE544TNXT2Z","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Uncertainties in the Inference of Internal Structure: The Case of TRAPPIST-1 f","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Allona Vazan, Chenliang Huang, David R. Rice, Jason H. Steffen","submitted_at":"2025-04-22T18:47:58Z","abstract_excerpt":"We use the TRAPPIST-1 system as a model observation of Earth-like planets. The densities of these planets being 1-10% less than the Earth suggest that the outer planets may host significant hydrospheres. We explore the uncertainty in water mass fraction from observed mass and radius. We investigate the interior structure of TRAPPIST-1 f using the open-source solver MAGRATHEA and varying assumptions in the interior model. We find that TRAPPIST-1 f likely has a water mass fraction of 16.2% $\\pm$ 9.9% when considering all possible core mass fractions and requires 6.9% $\\pm$ 2.0% water at an Earth"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.16201","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/2504.16201/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":"2026-07-05T10:52:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/evLqYEO1n/nQs0QpPLFXrwBGNeej6zjR907yp5Ep2t31NTooqb9i0PV/YY2f7iLw3poxo6xuaBrhQyhJihqBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T17:57:42.330656Z"},"content_sha256":"8231349ee7ec6e72829e73236b45da7ab7c606c7dac0e91b6a9550423688b494","schema_version":"1.0","event_id":"sha256:8231349ee7ec6e72829e73236b45da7ab7c606c7dac0e91b6a9550423688b494"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EDTN2MIM5HPGV4ORE544TNXT2Z/bundle.json","state_url":"https://pith.science/pith/EDTN2MIM5HPGV4ORE544TNXT2Z/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EDTN2MIM5HPGV4ORE544TNXT2Z/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":"2026-08-07T17:57:42Z","links":{"resolver":"https://pith.science/pith/EDTN2MIM5HPGV4ORE544TNXT2Z","bundle":"https://pith.science/pith/EDTN2MIM5HPGV4ORE544TNXT2Z/bundle.json","state":"https://pith.science/pith/EDTN2MIM5HPGV4ORE544TNXT2Z/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EDTN2MIM5HPGV4ORE544TNXT2Z/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:EDTN2MIM5HPGV4ORE544TNXT2Z","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":"3340304e8371c37fcc28b62267a342808eabe959e942bbe9f6123b8e01250942","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-04-22T18:47:58Z","title_canon_sha256":"1316190de46037d6d49087c6e64dddb316ee3657ac1366eabbf95517ee2cb57d"},"schema_version":"1.0","source":{"id":"2504.16201","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.16201","created_at":"2026-07-05T10:52:43Z"},{"alias_kind":"arxiv_version","alias_value":"2504.16201v1","created_at":"2026-07-05T10:52:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.16201","created_at":"2026-07-05T10:52:43Z"},{"alias_kind":"pith_short_12","alias_value":"EDTN2MIM5HPG","created_at":"2026-07-05T10:52:43Z"},{"alias_kind":"pith_short_16","alias_value":"EDTN2MIM5HPGV4OR","created_at":"2026-07-05T10:52:43Z"},{"alias_kind":"pith_short_8","alias_value":"EDTN2MIM","created_at":"2026-07-05T10:52:43Z"}],"graph_snapshots":[{"event_id":"sha256:8231349ee7ec6e72829e73236b45da7ab7c606c7dac0e91b6a9550423688b494","target":"graph","created_at":"2026-07-05T10:52:43Z","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/2504.16201/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We use the TRAPPIST-1 system as a model observation of Earth-like planets. The densities of these planets being 1-10% less than the Earth suggest that the outer planets may host significant hydrospheres. We explore the uncertainty in water mass fraction from observed mass and radius. We investigate the interior structure of TRAPPIST-1 f using the open-source solver MAGRATHEA and varying assumptions in the interior model. We find that TRAPPIST-1 f likely has a water mass fraction of 16.2% $\\pm$ 9.9% when considering all possible core mass fractions and requires 6.9% $\\pm$ 2.0% water at an Earth","authors_text":"Allona Vazan, Chenliang Huang, David R. Rice, Jason H. Steffen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-04-22T18:47:58Z","title":"Uncertainties in the Inference of Internal Structure: The Case of TRAPPIST-1 f"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.16201","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":"sha256:3a29e256dc0ccfd3c3543bdf395bebd90f27f168ef507629af5b98c3cb6d0d6e","target":"record","created_at":"2026-07-05T10:52:43Z","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":"3340304e8371c37fcc28b62267a342808eabe959e942bbe9f6123b8e01250942","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-04-22T18:47:58Z","title_canon_sha256":"1316190de46037d6d49087c6e64dddb316ee3657ac1366eabbf95517ee2cb57d"},"schema_version":"1.0","source":{"id":"2504.16201","kind":"arxiv","version":1}},"canonical_sha256":"20e6dd310ce9de6af1d12779c9b6f3d65e113404e9b945e3d7cc3f713b31a789","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"20e6dd310ce9de6af1d12779c9b6f3d65e113404e9b945e3d7cc3f713b31a789","first_computed_at":"2026-07-05T10:52:43.146843Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:52:43.146843Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HGA+5Mpd31aujV2mS0n51AJa/wdGcYi3+qcPshWf3k/zXz6t5GuMHzHIiTOzN4kpJj3mCy7vl6L/t3M43LnnDA==","signature_status":"signed_v1","signed_at":"2026-07-05T10:52:43.147263Z","signed_message":"canonical_sha256_bytes"},"source_id":"2504.16201","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3a29e256dc0ccfd3c3543bdf395bebd90f27f168ef507629af5b98c3cb6d0d6e","sha256:8231349ee7ec6e72829e73236b45da7ab7c606c7dac0e91b6a9550423688b494"],"state_sha256":"4c243535d72609c2cd1fa40823d4953498f1cac82c03aceae78b1534b148122f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xlAxTQRhhTXq5dIuNr/vW+8/F/LWPlQqR5S7Cbt0VBz40Y+LGCxtVBfHzfFAh2dX7BbAFACoIbVMkRaIzWxaAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T17:57:42.334959Z","bundle_sha256":"ae2920a97974cf88fcd286c05158b79a3bcbbefbe789a3c039d8e5db7bde592e"}}