{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:RB4LGTJHXWVBBDB6EVXUK45KEH","short_pith_number":"pith:RB4LGTJH","canonical_record":{"source":{"id":"2104.08285","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-04-16T18:00:01Z","cross_cats_sorted":["astro-ph.IM","astro-ph.SR"],"title_canon_sha256":"2f775abeee6df179e8bd23b83b5f35bb76dbab3cef585e015f3ccb1742ed5130","abstract_canon_sha256":"ce079af7967e26c7aa9b8cb520e8ce763b4412eaaf2552239806cb4c824913a7"},"schema_version":"1.0"},"canonical_sha256":"8878b34d27bdaa108c3e256f4573aa21ff7463f2067aaa3832a922775d67a19b","source":{"kind":"arxiv","id":"2104.08285","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.08285","created_at":"2026-07-05T02:33:59Z"},{"alias_kind":"arxiv_version","alias_value":"2104.08285v2","created_at":"2026-07-05T02:33:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.08285","created_at":"2026-07-05T02:33:59Z"},{"alias_kind":"pith_short_12","alias_value":"RB4LGTJHXWVB","created_at":"2026-07-05T02:33:59Z"},{"alias_kind":"pith_short_16","alias_value":"RB4LGTJHXWVBBDB6","created_at":"2026-07-05T02:33:59Z"},{"alias_kind":"pith_short_8","alias_value":"RB4LGTJH","created_at":"2026-07-05T02:33:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:RB4LGTJHXWVBBDB6EVXUK45KEH","target":"record","payload":{"canonical_record":{"source":{"id":"2104.08285","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-04-16T18:00:01Z","cross_cats_sorted":["astro-ph.IM","astro-ph.SR"],"title_canon_sha256":"2f775abeee6df179e8bd23b83b5f35bb76dbab3cef585e015f3ccb1742ed5130","abstract_canon_sha256":"ce079af7967e26c7aa9b8cb520e8ce763b4412eaaf2552239806cb4c824913a7"},"schema_version":"1.0"},"canonical_sha256":"8878b34d27bdaa108c3e256f4573aa21ff7463f2067aaa3832a922775d67a19b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:33:59.201228Z","signature_b64":"RbEPlHylhIXikJrGBKUtfz+HHzsE9wzglADdiiJCNFT6A/lZkx8cG7Hpkxib4ZgAGfEp9OaNA6qpXjBlNBuJBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8878b34d27bdaa108c3e256f4573aa21ff7463f2067aaa3832a922775d67a19b","last_reissued_at":"2026-07-05T02:33:59.200791Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:33:59.200791Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2104.08285","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":"2026-07-05T02:33:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ppqv9aVVR9UiKyNWWEkxD3VhEK4fK7yKyK2gTh6aoi1NeUItnH1wePt8Qcl4SUO/dBfV1efZHpQDxHSccQFEDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T03:20:14.166282Z"},"content_sha256":"8c15a5ed609ffd1bc96c95ebfd97348782164da07c5885b18990d156826b11b0","schema_version":"1.0","event_id":"sha256:8c15a5ed609ffd1bc96c95ebfd97348782164da07c5885b18990d156826b11b0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:RB4LGTJHXWVBBDB6EVXUK45KEH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Discovery of a directly imaged planet to the young solar analog YSES 2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM","astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"Alexander J. Bohn, Christian Adam, Christian Ginski, Eric E. Mamajek, Frans Snik, Maddalena Reggiani, Mark J. Pecaut, Markus Mugrauer, Matthew A. Kenworthy, Nikolaus Vogt, Tiffany Meshkat","submitted_at":"2021-04-16T18:00:01Z","abstract_excerpt":"Abbreviated. By selecting stars with similar ages and masses, the Young Suns Exoplanet Survey (YSES) aims to detect and characterize planetary-mass companions to solar-type host stars in the Scorpius-Centaurus association. Our survey is carried out with VLT/SPHERE with short exposure sequences on the order of 5 min per star per filter. The subtraction of the stellar point spread function (PSF) is based on reference star differential imaging (RDI) using the other targets in the survey in combination with principal component analysis. We report the discovery of YSES 2b, a planetary-mass companio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.08285","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/2104.08285/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":"2026-07-05T02:33:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"USRfhHbSk+83SrbRIlvIgVU9umQ8IBIPQ9kF66htUPcQXXEGPNL5jR//kz18IKb9Eb3URR7eZgeYX8oF5rWCBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T03:20:14.166972Z"},"content_sha256":"90d12625311ed162c1b5dd95c412c0710ab532888a28479dbf4f384aa0242315","schema_version":"1.0","event_id":"sha256:90d12625311ed162c1b5dd95c412c0710ab532888a28479dbf4f384aa0242315"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RB4LGTJHXWVBBDB6EVXUK45KEH/bundle.json","state_url":"https://pith.science/pith/RB4LGTJHXWVBBDB6EVXUK45KEH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RB4LGTJHXWVBBDB6EVXUK45KEH/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":"2026-08-05T03:20:14Z","links":{"resolver":"https://pith.science/pith/RB4LGTJHXWVBBDB6EVXUK45KEH","bundle":"https://pith.science/pith/RB4LGTJHXWVBBDB6EVXUK45KEH/bundle.json","state":"https://pith.science/pith/RB4LGTJHXWVBBDB6EVXUK45KEH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RB4LGTJHXWVBBDB6EVXUK45KEH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:RB4LGTJHXWVBBDB6EVXUK45KEH","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":"ce079af7967e26c7aa9b8cb520e8ce763b4412eaaf2552239806cb4c824913a7","cross_cats_sorted":["astro-ph.IM","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-04-16T18:00:01Z","title_canon_sha256":"2f775abeee6df179e8bd23b83b5f35bb76dbab3cef585e015f3ccb1742ed5130"},"schema_version":"1.0","source":{"id":"2104.08285","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.08285","created_at":"2026-07-05T02:33:59Z"},{"alias_kind":"arxiv_version","alias_value":"2104.08285v2","created_at":"2026-07-05T02:33:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.08285","created_at":"2026-07-05T02:33:59Z"},{"alias_kind":"pith_short_12","alias_value":"RB4LGTJHXWVB","created_at":"2026-07-05T02:33:59Z"},{"alias_kind":"pith_short_16","alias_value":"RB4LGTJHXWVBBDB6","created_at":"2026-07-05T02:33:59Z"},{"alias_kind":"pith_short_8","alias_value":"RB4LGTJH","created_at":"2026-07-05T02:33:59Z"}],"graph_snapshots":[{"event_id":"sha256:90d12625311ed162c1b5dd95c412c0710ab532888a28479dbf4f384aa0242315","target":"graph","created_at":"2026-07-05T02:33:59Z","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/2104.08285/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Abbreviated. By selecting stars with similar ages and masses, the Young Suns Exoplanet Survey (YSES) aims to detect and characterize planetary-mass companions to solar-type host stars in the Scorpius-Centaurus association. Our survey is carried out with VLT/SPHERE with short exposure sequences on the order of 5 min per star per filter. The subtraction of the stellar point spread function (PSF) is based on reference star differential imaging (RDI) using the other targets in the survey in combination with principal component analysis. We report the discovery of YSES 2b, a planetary-mass companio","authors_text":"Alexander J. Bohn, Christian Adam, Christian Ginski, Eric E. Mamajek, Frans Snik, Maddalena Reggiani, Mark J. Pecaut, Markus Mugrauer, Matthew A. Kenworthy, Nikolaus Vogt, Tiffany Meshkat","cross_cats":["astro-ph.IM","astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-04-16T18:00:01Z","title":"Discovery of a directly imaged planet to the young solar analog YSES 2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.08285","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":"sha256:8c15a5ed609ffd1bc96c95ebfd97348782164da07c5885b18990d156826b11b0","target":"record","created_at":"2026-07-05T02:33:59Z","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":"ce079af7967e26c7aa9b8cb520e8ce763b4412eaaf2552239806cb4c824913a7","cross_cats_sorted":["astro-ph.IM","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-04-16T18:00:01Z","title_canon_sha256":"2f775abeee6df179e8bd23b83b5f35bb76dbab3cef585e015f3ccb1742ed5130"},"schema_version":"1.0","source":{"id":"2104.08285","kind":"arxiv","version":2}},"canonical_sha256":"8878b34d27bdaa108c3e256f4573aa21ff7463f2067aaa3832a922775d67a19b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8878b34d27bdaa108c3e256f4573aa21ff7463f2067aaa3832a922775d67a19b","first_computed_at":"2026-07-05T02:33:59.200791Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:33:59.200791Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RbEPlHylhIXikJrGBKUtfz+HHzsE9wzglADdiiJCNFT6A/lZkx8cG7Hpkxib4ZgAGfEp9OaNA6qpXjBlNBuJBA==","signature_status":"signed_v1","signed_at":"2026-07-05T02:33:59.201228Z","signed_message":"canonical_sha256_bytes"},"source_id":"2104.08285","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8c15a5ed609ffd1bc96c95ebfd97348782164da07c5885b18990d156826b11b0","sha256:90d12625311ed162c1b5dd95c412c0710ab532888a28479dbf4f384aa0242315"],"state_sha256":"702662b0af7c8a9cf2677dce180993ec1597cccb6f686b5c37ed85e6e4f04fa6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CD/Des0p7vad5XMkfsAR64j9fjWXIe456hlrJZrNoigFrezG8+LRrSydvelDyUnM4d9zJnf1fdOyn9k7vq1IDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T03:20:14.177032Z","bundle_sha256":"3e0dc4a104cf0779049b42e7392bf27962afe92fa502359b7528e21ee706e38e"}}