{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:6RIFMMTEJJYE3M6YGNN2PO373S","short_pith_number":"pith:6RIFMMTE","canonical_record":{"source":{"id":"2007.07939","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-07-15T18:28:41Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"a0fd032f68d96a316c6b2e51aa4adb751754da8e0d511d42ccfdba0a2015e771","abstract_canon_sha256":"f4d779d4b394ad272564d4e065d966d1d95075f41b1e3a83f0abe509180cf465"},"schema_version":"1.0"},"canonical_sha256":"f4505632644a704db3d8335ba7bb7fdcacb28535b4699f942cbfa6d4bde38e8c","source":{"kind":"arxiv","id":"2007.07939","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.07939","created_at":"2026-07-05T01:22:51Z"},{"alias_kind":"arxiv_version","alias_value":"2007.07939v1","created_at":"2026-07-05T01:22:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.07939","created_at":"2026-07-05T01:22:51Z"},{"alias_kind":"pith_short_12","alias_value":"6RIFMMTEJJYE","created_at":"2026-07-05T01:22:51Z"},{"alias_kind":"pith_short_16","alias_value":"6RIFMMTEJJYE3M6Y","created_at":"2026-07-05T01:22:51Z"},{"alias_kind":"pith_short_8","alias_value":"6RIFMMTE","created_at":"2026-07-05T01:22:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:6RIFMMTEJJYE3M6YGNN2PO373S","target":"record","payload":{"canonical_record":{"source":{"id":"2007.07939","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-07-15T18:28:41Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"a0fd032f68d96a316c6b2e51aa4adb751754da8e0d511d42ccfdba0a2015e771","abstract_canon_sha256":"f4d779d4b394ad272564d4e065d966d1d95075f41b1e3a83f0abe509180cf465"},"schema_version":"1.0"},"canonical_sha256":"f4505632644a704db3d8335ba7bb7fdcacb28535b4699f942cbfa6d4bde38e8c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:22:51.030608Z","signature_b64":"COcGDG+4QpSIUnOZCqmOT2qWeVkGWooxWeeuYzxwUVvkxCYh7AvW50w+5mTGrD4+4HlKV/awzd4mlJIop8LMBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f4505632644a704db3d8335ba7bb7fdcacb28535b4699f942cbfa6d4bde38e8c","last_reissued_at":"2026-07-05T01:22:51.030117Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:22:51.030117Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2007.07939","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":"2026-07-05T01:22:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FX/S0EwKVp4iFyw0hWwOHN3c2f3AIpYiXKIOyEWi4bWhGAJrIwbGuLPU2KXGRbWCWHUN+dxW9EBbSzaQdncmBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T13:00:36.739110Z"},"content_sha256":"807add4fc716442cb466d8d778badf006495fd5c8d3e69c244f5577dc7c317c8","schema_version":"1.0","event_id":"sha256:807add4fc716442cb466d8d778badf006495fd5c8d3e69c244f5577dc7c317c8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:6RIFMMTEJJYE3M6YGNN2PO373S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"K2-280b -- a low density warm sub-Saturn around a mildly evolved star","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"Akihiko Fukui, Alexander Chaushev, Alexis M. S. Smith, Anders Erikson, Andr\\'es Jord\\'an, Artie P. Hatzes, Carina M. Persson, Davide Gandolfi, David Nespral, Diego Hidalgo, Eike W. Guenther, Emil Knudstrup, Enric Palle, Fei Dai, Felipe Murgas, Felipe Rojas, Florian Rodler, Grzegorz Nowak, Hans J. Deeg, Heike Rauer, Ignasi Ribas, Ilaria Carleo, Iskra Georgieva, Jano Subjak, Jerome de Leon, John H. Livingston, Jorge Prieto-Arranz, Juan Cabrera, Judith Korth, Kristine W. F. Lam, Luc\\'ia Gonz\\'alez-Cuesta, Malcolm Fridlund, Marek Skarka, Maria Hjorth, Marshall C. Johnson, Martin P\\\"atzold, Masayuki Kuzuhara, Massimiliano Esposito, Michael Endl, Mikkel N. Lund, N\\'estor Espinoza, Norio Narita, N\\'uria Casasayas Barris, Oscar Barrag\\'an, Pere Blay, Petr Kabath, Philipp Eigm\\\"uller, Pilar Monta\\~nes Rodr\\'iguez, Prajwal Niraula, Rafael Brahm, Rafael Luque, Roi Alonso Sobrino, Sascha Grziwa, Savita Mathur, Seth Redfield, Simon Albrecht, Szil\\'ard Csizmadia, Teruyuki Hirano, Vincent Van Eylen, William D. Cochran","submitted_at":"2020-07-15T18:28:41Z","abstract_excerpt":"We present an independent discovery and detailed characterisation of K2-280b, a transiting low density warm sub-Saturn in a 19.9-day moderately eccentric orbit (e = 0.35_{-0.04}^{+0.05}) from K2 campaign 7. A joint analysis of high precision HARPS, HARPS-N, and FIES radial velocity measurements and K2 photometric data indicates that K2-280b has a radius of R_b = 7.50 +/- 0.44 R_Earth and a mass of M_b = 37.1 +/- 5.6 M_Earth, yielding a mean density of 0.48_{-0.10}^{+0.13} g/cm^3. The host star is a mildly evolved G7 star with an effective temperature of T_{eff} = 5500 +/- 100 K, a surface grav"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.07939","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/2007.07939/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":"2026-07-05T01:22:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HLtjoGUW6dip85rUxl38u0kdt6Yg3Vzxd6yX0Bl2m/IVq9Tvj6kvHnvEsCOStVAMva60Vp+JBnbnPYAxISALCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T13:00:36.739671Z"},"content_sha256":"8490f33154fc09d6c302381cf090db042a1cfab181b5e98d63dcd0f5609dabd7","schema_version":"1.0","event_id":"sha256:8490f33154fc09d6c302381cf090db042a1cfab181b5e98d63dcd0f5609dabd7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6RIFMMTEJJYE3M6YGNN2PO373S/bundle.json","state_url":"https://pith.science/pith/6RIFMMTEJJYE3M6YGNN2PO373S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6RIFMMTEJJYE3M6YGNN2PO373S/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":"2026-08-17T13:00:36Z","links":{"resolver":"https://pith.science/pith/6RIFMMTEJJYE3M6YGNN2PO373S","bundle":"https://pith.science/pith/6RIFMMTEJJYE3M6YGNN2PO373S/bundle.json","state":"https://pith.science/pith/6RIFMMTEJJYE3M6YGNN2PO373S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6RIFMMTEJJYE3M6YGNN2PO373S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:6RIFMMTEJJYE3M6YGNN2PO373S","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":"f4d779d4b394ad272564d4e065d966d1d95075f41b1e3a83f0abe509180cf465","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-07-15T18:28:41Z","title_canon_sha256":"a0fd032f68d96a316c6b2e51aa4adb751754da8e0d511d42ccfdba0a2015e771"},"schema_version":"1.0","source":{"id":"2007.07939","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.07939","created_at":"2026-07-05T01:22:51Z"},{"alias_kind":"arxiv_version","alias_value":"2007.07939v1","created_at":"2026-07-05T01:22:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.07939","created_at":"2026-07-05T01:22:51Z"},{"alias_kind":"pith_short_12","alias_value":"6RIFMMTEJJYE","created_at":"2026-07-05T01:22:51Z"},{"alias_kind":"pith_short_16","alias_value":"6RIFMMTEJJYE3M6Y","created_at":"2026-07-05T01:22:51Z"},{"alias_kind":"pith_short_8","alias_value":"6RIFMMTE","created_at":"2026-07-05T01:22:51Z"}],"graph_snapshots":[{"event_id":"sha256:8490f33154fc09d6c302381cf090db042a1cfab181b5e98d63dcd0f5609dabd7","target":"graph","created_at":"2026-07-05T01:22:51Z","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/2007.07939/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present an independent discovery and detailed characterisation of K2-280b, a transiting low density warm sub-Saturn in a 19.9-day moderately eccentric orbit (e = 0.35_{-0.04}^{+0.05}) from K2 campaign 7. A joint analysis of high precision HARPS, HARPS-N, and FIES radial velocity measurements and K2 photometric data indicates that K2-280b has a radius of R_b = 7.50 +/- 0.44 R_Earth and a mass of M_b = 37.1 +/- 5.6 M_Earth, yielding a mean density of 0.48_{-0.10}^{+0.13} g/cm^3. The host star is a mildly evolved G7 star with an effective temperature of T_{eff} = 5500 +/- 100 K, a surface grav","authors_text":"Akihiko Fukui, Alexander Chaushev, Alexis M. S. Smith, Anders Erikson, Andr\\'es Jord\\'an, Artie P. Hatzes, Carina M. Persson, Davide Gandolfi, David Nespral, Diego Hidalgo, Eike W. Guenther, Emil Knudstrup, Enric Palle, Fei Dai, Felipe Murgas, Felipe Rojas, Florian Rodler, Grzegorz Nowak, Hans J. Deeg, Heike Rauer, Ignasi Ribas, Ilaria Carleo, Iskra Georgieva, Jano Subjak, Jerome de Leon, John H. Livingston, Jorge Prieto-Arranz, Juan Cabrera, Judith Korth, Kristine W. F. Lam, Luc\\'ia Gonz\\'alez-Cuesta, Malcolm Fridlund, Marek Skarka, Maria Hjorth, Marshall C. Johnson, Martin P\\\"atzold, Masayuki Kuzuhara, Massimiliano Esposito, Michael Endl, Mikkel N. Lund, N\\'estor Espinoza, Norio Narita, N\\'uria Casasayas Barris, Oscar Barrag\\'an, Pere Blay, Petr Kabath, Philipp Eigm\\\"uller, Pilar Monta\\~nes Rodr\\'iguez, Prajwal Niraula, Rafael Brahm, Rafael Luque, Roi Alonso Sobrino, Sascha Grziwa, Savita Mathur, Seth Redfield, Simon Albrecht, Szil\\'ard Csizmadia, Teruyuki Hirano, Vincent Van Eylen, William D. Cochran","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-07-15T18:28:41Z","title":"K2-280b -- a low density warm sub-Saturn around a mildly evolved star"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.07939","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":"sha256:807add4fc716442cb466d8d778badf006495fd5c8d3e69c244f5577dc7c317c8","target":"record","created_at":"2026-07-05T01:22:51Z","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":"f4d779d4b394ad272564d4e065d966d1d95075f41b1e3a83f0abe509180cf465","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-07-15T18:28:41Z","title_canon_sha256":"a0fd032f68d96a316c6b2e51aa4adb751754da8e0d511d42ccfdba0a2015e771"},"schema_version":"1.0","source":{"id":"2007.07939","kind":"arxiv","version":1}},"canonical_sha256":"f4505632644a704db3d8335ba7bb7fdcacb28535b4699f942cbfa6d4bde38e8c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f4505632644a704db3d8335ba7bb7fdcacb28535b4699f942cbfa6d4bde38e8c","first_computed_at":"2026-07-05T01:22:51.030117Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:22:51.030117Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"COcGDG+4QpSIUnOZCqmOT2qWeVkGWooxWeeuYzxwUVvkxCYh7AvW50w+5mTGrD4+4HlKV/awzd4mlJIop8LMBg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:22:51.030608Z","signed_message":"canonical_sha256_bytes"},"source_id":"2007.07939","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:807add4fc716442cb466d8d778badf006495fd5c8d3e69c244f5577dc7c317c8","sha256:8490f33154fc09d6c302381cf090db042a1cfab181b5e98d63dcd0f5609dabd7"],"state_sha256":"8aa70cffe27ef7f0b139637287ae02cf2ebd109a45ff248e352467e5228109ea"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FFuRNdf25EnE2IeXxtstesYRWNyNixtlKYMCbBQ2DgW2kIiRaO9g7AXaLeVYXR78K7M14qnN2sVzoVnA5FY/BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T13:00:36.744209Z","bundle_sha256":"fec8de9ea22eccf4d24256a13c09b9f2d460d5fcc54d913355348843658556b6"}}