{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:2FGA5MHLNMEC2UEBJPOAMEXEYF","short_pith_number":"pith:2FGA5MHL","canonical_record":{"source":{"id":"1802.00468","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-02-01T19:34:41Z","cross_cats_sorted":[],"title_canon_sha256":"19781575fe049ff0db178e6dddf9c4fe7c4914b8603287e8d69d1b0d0702c95f","abstract_canon_sha256":"88366e7e0b3100c6d491f34f86d6e22815c5b6900aed3ac39a635b40952522ea"},"schema_version":"1.0"},"canonical_sha256":"d14c0eb0eb6b082d50814bdc0612e4c153fda627ab90432b4d9277150b5b6e4d","source":{"kind":"arxiv","id":"1802.00468","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.00468","created_at":"2026-05-18T00:21:20Z"},{"alias_kind":"arxiv_version","alias_value":"1802.00468v1","created_at":"2026-05-18T00:21:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.00468","created_at":"2026-05-18T00:21:20Z"},{"alias_kind":"pith_short_12","alias_value":"2FGA5MHLNMEC","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"2FGA5MHLNMEC2UEB","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"2FGA5MHL","created_at":"2026-05-18T12:32:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:2FGA5MHLNMEC2UEBJPOAMEXEYF","target":"record","payload":{"canonical_record":{"source":{"id":"1802.00468","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-02-01T19:34:41Z","cross_cats_sorted":[],"title_canon_sha256":"19781575fe049ff0db178e6dddf9c4fe7c4914b8603287e8d69d1b0d0702c95f","abstract_canon_sha256":"88366e7e0b3100c6d491f34f86d6e22815c5b6900aed3ac39a635b40952522ea"},"schema_version":"1.0"},"canonical_sha256":"d14c0eb0eb6b082d50814bdc0612e4c153fda627ab90432b4d9277150b5b6e4d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:21:20.254511Z","signature_b64":"v92+LuxKC3eHJjILoNNhNJUzPH0Uqyyj9id946pgKKHfXX0FO8u9u6Ty7Oe8G5SzrFHzJqgN0GS8VLF5mOPyAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d14c0eb0eb6b082d50814bdc0612e4c153fda627ab90432b4d9277150b5b6e4d","last_reissued_at":"2026-05-18T00:21:20.252802Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:21:20.252802Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.00468","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":"2026-05-18T00:21:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mW1ggdK4+FZqtgqfna/YROeG/380c14+hGT13WTWAzsLeap6SjeR+bsdbhBZ0Ruo6QBRT1fKnTg1y3U3o94nAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T12:17:25.697897Z"},"content_sha256":"d7842995437b279225b938a1ccd2126112c5c3237c81ff417aa04c77fb417f25","schema_version":"1.0","event_id":"sha256:d7842995437b279225b938a1ccd2126112c5c3237c81ff417aa04c77fb417f25"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:2FGA5MHLNMEC2UEBJPOAMEXEYF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Precision Orbit of $\\delta$ Delphini and Prospects for Astrometric Detection of Exoplanets","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"(10) Aarhus University, (11) Pennsylvania State University, (12) Australian National University, (13) The CHARA Array of Georgia State University, (14) Georgia State University, (15) University of Arizona), (2) Tennessee State University, (3) Univ. of Colorado, (4) Stockholm University, (5) University of Exeter, (6) Michigan State University, (7) University of Hawaii, 8, (8) Sydney Institute for Astronomy, 9), (9) SETI Institute, Ann Arbor, Boulder, Daniel Huber (7, Douglas K. Duncan (3), Fabien Baron (14), Francis C. Fekel (2), Fred C. Adams (1), Gail Schaefer (13), John D. Monnier (1), Judit Sturmann (13), Laszlo Sturmann (13), Michael Ireland (12), Mike Williamson (2), Ming Zhao (11) ((1) University of Michigan, Rachael M. Roettenbacher (4), Samuel J. Swihart (6), Stefan Kraus (5), Theo ten Brummelaar (13), Timothy R. White (10), Travis Barman (15), Tyler Gardner (1), Xiao Che (1)","submitted_at":"2018-02-01T19:34:41Z","abstract_excerpt":"Combining visual and spectroscopic orbits of binary stars leads to a determination of the full 3D orbit, individual masses, and distance to the system. We present a full analysis of the evolved binary system $\\delta$ Delphini using astrometric data from the MIRC and PAVO instruments on the CHARA long-baseline interferometer, 97 new spectra from the Fairborn Observatory, and 87 unpublished spectra from Lick Observatory. We determine the full set of orbital elements for $\\delta$ Del, along with masses of $1.78 \\pm 0.07$ $M_{\\odot}$ and $1.62 \\pm 0.07$ $M_{\\odot}$ for each component, and a distan"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.00468","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":"2026-05-18T00:21:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h5ytyvfYK1sD17KBJ+JgDCKDkPGm56OH4PevE+fW4xZ3JLcH3Usv2mbIXjKxSuUNfqAH66XtwUg9NnJvS3oLDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T12:17:25.698392Z"},"content_sha256":"c3d7e7ac3172e1cf108476838b9ae4687c0a89af8f8aaa43e52361157110b1ec","schema_version":"1.0","event_id":"sha256:c3d7e7ac3172e1cf108476838b9ae4687c0a89af8f8aaa43e52361157110b1ec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2FGA5MHLNMEC2UEBJPOAMEXEYF/bundle.json","state_url":"https://pith.science/pith/2FGA5MHLNMEC2UEBJPOAMEXEYF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2FGA5MHLNMEC2UEBJPOAMEXEYF/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":"2026-05-26T12:17:25Z","links":{"resolver":"https://pith.science/pith/2FGA5MHLNMEC2UEBJPOAMEXEYF","bundle":"https://pith.science/pith/2FGA5MHLNMEC2UEBJPOAMEXEYF/bundle.json","state":"https://pith.science/pith/2FGA5MHLNMEC2UEBJPOAMEXEYF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2FGA5MHLNMEC2UEBJPOAMEXEYF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:2FGA5MHLNMEC2UEBJPOAMEXEYF","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":"88366e7e0b3100c6d491f34f86d6e22815c5b6900aed3ac39a635b40952522ea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-02-01T19:34:41Z","title_canon_sha256":"19781575fe049ff0db178e6dddf9c4fe7c4914b8603287e8d69d1b0d0702c95f"},"schema_version":"1.0","source":{"id":"1802.00468","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.00468","created_at":"2026-05-18T00:21:20Z"},{"alias_kind":"arxiv_version","alias_value":"1802.00468v1","created_at":"2026-05-18T00:21:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.00468","created_at":"2026-05-18T00:21:20Z"},{"alias_kind":"pith_short_12","alias_value":"2FGA5MHLNMEC","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"2FGA5MHLNMEC2UEB","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"2FGA5MHL","created_at":"2026-05-18T12:32:02Z"}],"graph_snapshots":[{"event_id":"sha256:c3d7e7ac3172e1cf108476838b9ae4687c0a89af8f8aaa43e52361157110b1ec","target":"graph","created_at":"2026-05-18T00:21:20Z","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":"Combining visual and spectroscopic orbits of binary stars leads to a determination of the full 3D orbit, individual masses, and distance to the system. We present a full analysis of the evolved binary system $\\delta$ Delphini using astrometric data from the MIRC and PAVO instruments on the CHARA long-baseline interferometer, 97 new spectra from the Fairborn Observatory, and 87 unpublished spectra from Lick Observatory. We determine the full set of orbital elements for $\\delta$ Del, along with masses of $1.78 \\pm 0.07$ $M_{\\odot}$ and $1.62 \\pm 0.07$ $M_{\\odot}$ for each component, and a distan","authors_text":"(10) Aarhus University, (11) Pennsylvania State University, (12) Australian National University, (13) The CHARA Array of Georgia State University, (14) Georgia State University, (15) University of Arizona), (2) Tennessee State University, (3) Univ. of Colorado, (4) Stockholm University, (5) University of Exeter, (6) Michigan State University, (7) University of Hawaii, 8, (8) Sydney Institute for Astronomy, 9), (9) SETI Institute, Ann Arbor, Boulder, Daniel Huber (7, Douglas K. Duncan (3), Fabien Baron (14), Francis C. Fekel (2), Fred C. Adams (1), Gail Schaefer (13), John D. Monnier (1), Judit Sturmann (13), Laszlo Sturmann (13), Michael Ireland (12), Mike Williamson (2), Ming Zhao (11) ((1) University of Michigan, Rachael M. Roettenbacher (4), Samuel J. Swihart (6), Stefan Kraus (5), Theo ten Brummelaar (13), Timothy R. White (10), Travis Barman (15), Tyler Gardner (1), Xiao Che (1)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-02-01T19:34:41Z","title":"Precision Orbit of $\\delta$ Delphini and Prospects for Astrometric Detection of Exoplanets"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.00468","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:d7842995437b279225b938a1ccd2126112c5c3237c81ff417aa04c77fb417f25","target":"record","created_at":"2026-05-18T00:21:20Z","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":"88366e7e0b3100c6d491f34f86d6e22815c5b6900aed3ac39a635b40952522ea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-02-01T19:34:41Z","title_canon_sha256":"19781575fe049ff0db178e6dddf9c4fe7c4914b8603287e8d69d1b0d0702c95f"},"schema_version":"1.0","source":{"id":"1802.00468","kind":"arxiv","version":1}},"canonical_sha256":"d14c0eb0eb6b082d50814bdc0612e4c153fda627ab90432b4d9277150b5b6e4d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d14c0eb0eb6b082d50814bdc0612e4c153fda627ab90432b4d9277150b5b6e4d","first_computed_at":"2026-05-18T00:21:20.252802Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:21:20.252802Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"v92+LuxKC3eHJjILoNNhNJUzPH0Uqyyj9id946pgKKHfXX0FO8u9u6Ty7Oe8G5SzrFHzJqgN0GS8VLF5mOPyAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:21:20.254511Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.00468","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d7842995437b279225b938a1ccd2126112c5c3237c81ff417aa04c77fb417f25","sha256:c3d7e7ac3172e1cf108476838b9ae4687c0a89af8f8aaa43e52361157110b1ec"],"state_sha256":"86bd9a6539707c50aae2924f6d6dcb56bd1628234b938122f96a57e908fd141c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IOgjV/H/5Rsua44wQV0EDdENjkshLS96UY5a8XLljmiCjTcSs9doq5EfCZpQcZzeLoqdq1AXIl5JjTdtB759Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T12:17:25.700942Z","bundle_sha256":"e68cb6860727a6bc563378aae45284e822014ecea13dcbec14bd5d8a28f3b45e"}}