{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:B4G24JOOLHK4653EZ5RUKPWSV7","short_pith_number":"pith:B4G24JOO","canonical_record":{"source":{"id":"1406.0818","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-06-03T19:18:40Z","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"title_canon_sha256":"09f1d12a7b43c70f687500dc196cb97e8017f9c6c31a23aff795f0521861ad34","abstract_canon_sha256":"a69a10559437bfe7df968dd52e6d69203e208d679389f7a489a56a0869fd3e42"},"schema_version":"1.0"},"canonical_sha256":"0f0dae25ce59d5cf7764cf63453ed2afd29d543c84691ca7ddc34dca3e80b483","source":{"kind":"arxiv","id":"1406.0818","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.0818","created_at":"2026-05-18T02:50:23Z"},{"alias_kind":"arxiv_version","alias_value":"1406.0818v1","created_at":"2026-05-18T02:50:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.0818","created_at":"2026-05-18T02:50:23Z"},{"alias_kind":"pith_short_12","alias_value":"B4G24JOOLHK4","created_at":"2026-05-18T12:28:19Z"},{"alias_kind":"pith_short_16","alias_value":"B4G24JOOLHK4653E","created_at":"2026-05-18T12:28:19Z"},{"alias_kind":"pith_short_8","alias_value":"B4G24JOO","created_at":"2026-05-18T12:28:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:B4G24JOOLHK4653EZ5RUKPWSV7","target":"record","payload":{"canonical_record":{"source":{"id":"1406.0818","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-06-03T19:18:40Z","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"title_canon_sha256":"09f1d12a7b43c70f687500dc196cb97e8017f9c6c31a23aff795f0521861ad34","abstract_canon_sha256":"a69a10559437bfe7df968dd52e6d69203e208d679389f7a489a56a0869fd3e42"},"schema_version":"1.0"},"canonical_sha256":"0f0dae25ce59d5cf7764cf63453ed2afd29d543c84691ca7ddc34dca3e80b483","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:50:23.862841Z","signature_b64":"xF222Ot11/ja3LPXeNoFyRd5HR9oz8YPuwXkkFajeZPQ1ctqJwHAGQJr2h/WTsD4UkgCZLzUz+IBF6nvfv8sAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0f0dae25ce59d5cf7764cf63453ed2afd29d543c84691ca7ddc34dca3e80b483","last_reissued_at":"2026-05-18T02:50:23.862255Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:50:23.862255Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1406.0818","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":"2026-05-18T02:50:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M7gP9uXTD+WXGbd/uQ2zpZAcNnXSjTFlZBc0+WZGKPWnXtUdcvkEcYnivQPO+vy8qLSk3pcClXnxHhBmlrZ4Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T13:26:04.685550Z"},"content_sha256":"37790e6522d55cfce6c1e2d34aa1bc16b0bdf423f3afe91a5bbcd7e22b7bdeed","schema_version":"1.0","event_id":"sha256:37790e6522d55cfce6c1e2d34aa1bc16b0bdf423f3afe91a5bbcd7e22b7bdeed"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:B4G24JOOLHK4653EZ5RUKPWSV7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Two planets around Kapteyn's star : a cold and a temperate super-Earth orbiting the nearest halo red-dwarf","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","astro-ph.IM"],"primary_cat":"astro-ph.EP","authors_text":"Ansgar Reiners, Aviv Ofir, Chris J. Marvin, Cristina Rodr\\'iguez-L\\'opez, Enrico Gerlach, Eugenio Rivera, Guillem Anglada-Escud\\'e, Hugh R.A. Jones, Ian B. Thompson, James S. Jenkins, Jeff D. Crane, Julian Morin, Luis F. Sarmiento, Mathias Zechmeister, Mat\\'ias D\\'iaz, Mikko Tuomi, Pamela Arriagada, Pedro J. Amado, R. Paul Butler, Sandra V. Jeffers, Stefan Dreizler, Stephen A. Shectman, Steven S. Vogt, Zaira M. Berdi\\~nas","submitted_at":"2014-06-03T19:18:40Z","abstract_excerpt":"Exoplanets of a few Earth masses can be now detected around nearby low-mass stars using Doppler spectroscopy. In this paper, we investigate the radial velocity variations of Kapteyn's star, which is both a sub-dwarf M-star and the nearest halo object to the Sun. The observations comprise archival and new HARPS, HIRES and PFS Doppler measurements. Two Doppler signals are detected at periods of 48 and 120 days using likelihood periodograms and a Bayesian analysis of the data. Using the same techniques, the activity indicies and archival ASAS-3 photometry show evidence for low-level activity peri"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.0818","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":""},"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":"2026-05-18T02:50:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SLIl2Pyzhjo83vyL0eiOnWuHLqT7c0NPUav2gni/Ts6AH6jIgeGOPtOIYdBKSw6rOVtdFLugg7L8AkPjnXagBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T13:26:04.686281Z"},"content_sha256":"f02e8c29d079c5f45b50b76769c0fa47bb78f878f2937077dff555884dc89701","schema_version":"1.0","event_id":"sha256:f02e8c29d079c5f45b50b76769c0fa47bb78f878f2937077dff555884dc89701"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/B4G24JOOLHK4653EZ5RUKPWSV7/bundle.json","state_url":"https://pith.science/pith/B4G24JOOLHK4653EZ5RUKPWSV7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/B4G24JOOLHK4653EZ5RUKPWSV7/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":"2026-05-30T13:26:04Z","links":{"resolver":"https://pith.science/pith/B4G24JOOLHK4653EZ5RUKPWSV7","bundle":"https://pith.science/pith/B4G24JOOLHK4653EZ5RUKPWSV7/bundle.json","state":"https://pith.science/pith/B4G24JOOLHK4653EZ5RUKPWSV7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/B4G24JOOLHK4653EZ5RUKPWSV7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:B4G24JOOLHK4653EZ5RUKPWSV7","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":"a69a10559437bfe7df968dd52e6d69203e208d679389f7a489a56a0869fd3e42","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-06-03T19:18:40Z","title_canon_sha256":"09f1d12a7b43c70f687500dc196cb97e8017f9c6c31a23aff795f0521861ad34"},"schema_version":"1.0","source":{"id":"1406.0818","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.0818","created_at":"2026-05-18T02:50:23Z"},{"alias_kind":"arxiv_version","alias_value":"1406.0818v1","created_at":"2026-05-18T02:50:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.0818","created_at":"2026-05-18T02:50:23Z"},{"alias_kind":"pith_short_12","alias_value":"B4G24JOOLHK4","created_at":"2026-05-18T12:28:19Z"},{"alias_kind":"pith_short_16","alias_value":"B4G24JOOLHK4653E","created_at":"2026-05-18T12:28:19Z"},{"alias_kind":"pith_short_8","alias_value":"B4G24JOO","created_at":"2026-05-18T12:28:19Z"}],"graph_snapshots":[{"event_id":"sha256:f02e8c29d079c5f45b50b76769c0fa47bb78f878f2937077dff555884dc89701","target":"graph","created_at":"2026-05-18T02:50:23Z","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"},"paper":{"abstract_excerpt":"Exoplanets of a few Earth masses can be now detected around nearby low-mass stars using Doppler spectroscopy. In this paper, we investigate the radial velocity variations of Kapteyn's star, which is both a sub-dwarf M-star and the nearest halo object to the Sun. The observations comprise archival and new HARPS, HIRES and PFS Doppler measurements. Two Doppler signals are detected at periods of 48 and 120 days using likelihood periodograms and a Bayesian analysis of the data. Using the same techniques, the activity indicies and archival ASAS-3 photometry show evidence for low-level activity peri","authors_text":"Ansgar Reiners, Aviv Ofir, Chris J. Marvin, Cristina Rodr\\'iguez-L\\'opez, Enrico Gerlach, Eugenio Rivera, Guillem Anglada-Escud\\'e, Hugh R.A. Jones, Ian B. Thompson, James S. Jenkins, Jeff D. Crane, Julian Morin, Luis F. Sarmiento, Mathias Zechmeister, Mat\\'ias D\\'iaz, Mikko Tuomi, Pamela Arriagada, Pedro J. Amado, R. Paul Butler, Sandra V. Jeffers, Stefan Dreizler, Stephen A. Shectman, Steven S. Vogt, Zaira M. Berdi\\~nas","cross_cats":["astro-ph.GA","astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-06-03T19:18:40Z","title":"Two planets around Kapteyn's star : a cold and a temperate super-Earth orbiting the nearest halo red-dwarf"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.0818","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":"sha256:37790e6522d55cfce6c1e2d34aa1bc16b0bdf423f3afe91a5bbcd7e22b7bdeed","target":"record","created_at":"2026-05-18T02:50:23Z","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":"a69a10559437bfe7df968dd52e6d69203e208d679389f7a489a56a0869fd3e42","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-06-03T19:18:40Z","title_canon_sha256":"09f1d12a7b43c70f687500dc196cb97e8017f9c6c31a23aff795f0521861ad34"},"schema_version":"1.0","source":{"id":"1406.0818","kind":"arxiv","version":1}},"canonical_sha256":"0f0dae25ce59d5cf7764cf63453ed2afd29d543c84691ca7ddc34dca3e80b483","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0f0dae25ce59d5cf7764cf63453ed2afd29d543c84691ca7ddc34dca3e80b483","first_computed_at":"2026-05-18T02:50:23.862255Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:50:23.862255Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xF222Ot11/ja3LPXeNoFyRd5HR9oz8YPuwXkkFajeZPQ1ctqJwHAGQJr2h/WTsD4UkgCZLzUz+IBF6nvfv8sAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:50:23.862841Z","signed_message":"canonical_sha256_bytes"},"source_id":"1406.0818","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:37790e6522d55cfce6c1e2d34aa1bc16b0bdf423f3afe91a5bbcd7e22b7bdeed","sha256:f02e8c29d079c5f45b50b76769c0fa47bb78f878f2937077dff555884dc89701"],"state_sha256":"198e76f3e5546348bb8524054d9db1e0242b9f90b261e45e48b9ee7d0dc21531"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kBU5I0s2LgxDlBIG6fjzZaPBczFz5ro6Jkx6JaRNn17WgbxSfD3G0cPXHAtIfr7AJlvWyMHKZGzqTHVQea1XDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T13:26:04.690349Z","bundle_sha256":"15b5bb3fa54fd0f3243b5e1fec7e21c2b50a0ebed3c4c35c20af1415b4c89286"}}