{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:Y4HIAPRTKLC2PNPBK6IKL4TGKS","short_pith_number":"pith:Y4HIAPRT","canonical_record":{"source":{"id":"2103.05148","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-03-09T00:15:00Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"a68b6772a8204904baafb226eb349318aec822602a1adbbecc9111002300274f","abstract_canon_sha256":"ac3cc3ed35230756e2a776cb5c3eb42368c87171471282648e3b1cb58f34c367"},"schema_version":"1.0"},"canonical_sha256":"c70e803e3352c5a7b5e15790a5f26654883ef7dff6dac5ced8e1e9a7f6933218","source":{"kind":"arxiv","id":"2103.05148","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.05148","created_at":"2026-07-05T02:37:45Z"},{"alias_kind":"arxiv_version","alias_value":"2103.05148v2","created_at":"2026-07-05T02:37:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.05148","created_at":"2026-07-05T02:37:45Z"},{"alias_kind":"pith_short_12","alias_value":"Y4HIAPRTKLC2","created_at":"2026-07-05T02:37:45Z"},{"alias_kind":"pith_short_16","alias_value":"Y4HIAPRTKLC2PNPB","created_at":"2026-07-05T02:37:45Z"},{"alias_kind":"pith_short_8","alias_value":"Y4HIAPRT","created_at":"2026-07-05T02:37:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:Y4HIAPRTKLC2PNPBK6IKL4TGKS","target":"record","payload":{"canonical_record":{"source":{"id":"2103.05148","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-03-09T00:15:00Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"a68b6772a8204904baafb226eb349318aec822602a1adbbecc9111002300274f","abstract_canon_sha256":"ac3cc3ed35230756e2a776cb5c3eb42368c87171471282648e3b1cb58f34c367"},"schema_version":"1.0"},"canonical_sha256":"c70e803e3352c5a7b5e15790a5f26654883ef7dff6dac5ced8e1e9a7f6933218","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:37:45.234989Z","signature_b64":"Y+z2R/JvXGmsM78N1FMatSeBVwyMYfhnYK/XZS4+CmN3OtcUJQyMK4KZuzz2bL/TMzDR5WbiWBJEYRDW9pARAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c70e803e3352c5a7b5e15790a5f26654883ef7dff6dac5ced8e1e9a7f6933218","last_reissued_at":"2026-07-05T02:37:45.234498Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:37:45.234498Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2103.05148","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":"2026-07-05T02:37:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jh3vay6uwcwWkZpbl3WSLpKekNY8i1xkZSPLVnJP5h+ztJ/d/RMHk8UO7KlqRupbUBOPDS5DCVM5UaJMbe2YBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T20:56:51.478307Z"},"content_sha256":"464a3faa5659b985f1315bda5a246ac637e0b14a1915f8670372bfeb64b84373","schema_version":"1.0","event_id":"sha256:464a3faa5659b985f1315bda5a246ac637e0b14a1915f8670372bfeb64b84373"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:Y4HIAPRTKLC2PNPBK6IKL4TGKS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Harsh Test of Far-Field Scrambling with the Habitable Zone Planet Finder and the Hobby Eberly Telescope","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.EP","authors_text":"Andrew J. Metcalf, Andrew Monson, Arpita Roy, Chad F. Bender, Christian Schwab, Eric B. Ford, Fred Hearty, Gudmundur Stefansson, Jason T. Wright, Joe P. Ninan, Lawrence W. Ramsey, Michael Endl, Niv Drory, Paul Robertson, Ryan C. Terrien, Samuel Halverson, Scott A. Diddams, Shubham Kanodia, Steven Janowiecki, Suvrath Mahadevan, William D. Cochran","submitted_at":"2021-03-09T00:15:00Z","abstract_excerpt":"The Habitable zone Planet Finder (HPF) is a fiber fed precise radial velocity spectrograph at the 10 m Hobby Eberly Telescope (HET). Due to its fixed altitude design, the HET pupil changes appreciably across a track, leading to significant changes of the fiber far-field illumination. HPF's fiber scrambler is designed to suppress the impact of these illumination changes on the radial velocities -- but the residual impact on the radial velocity measurements has yet to be probed on sky. We use GJ 411, a bright early type (M2) M dwarf to probe the effects of far-field input trends due to these pup"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.05148","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/2103.05148/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":"2026-07-05T02:37:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6Qv1lTMjhi2I5PrjcSDezJY9g9kXNXMJtmiDUMhc2NAl4IsMNP1A7y0vNC1llf/rarw+9n6D2P5yTgjYb8RUBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T20:56:51.478702Z"},"content_sha256":"cad4a8442596bd08df692059abb610cca39c09a05af2e9ecbf369bd8ab1bf467","schema_version":"1.0","event_id":"sha256:cad4a8442596bd08df692059abb610cca39c09a05af2e9ecbf369bd8ab1bf467"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Y4HIAPRTKLC2PNPBK6IKL4TGKS/bundle.json","state_url":"https://pith.science/pith/Y4HIAPRTKLC2PNPBK6IKL4TGKS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Y4HIAPRTKLC2PNPBK6IKL4TGKS/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":"2026-07-06T20:56:51Z","links":{"resolver":"https://pith.science/pith/Y4HIAPRTKLC2PNPBK6IKL4TGKS","bundle":"https://pith.science/pith/Y4HIAPRTKLC2PNPBK6IKL4TGKS/bundle.json","state":"https://pith.science/pith/Y4HIAPRTKLC2PNPBK6IKL4TGKS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Y4HIAPRTKLC2PNPBK6IKL4TGKS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:Y4HIAPRTKLC2PNPBK6IKL4TGKS","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":"ac3cc3ed35230756e2a776cb5c3eb42368c87171471282648e3b1cb58f34c367","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-03-09T00:15:00Z","title_canon_sha256":"a68b6772a8204904baafb226eb349318aec822602a1adbbecc9111002300274f"},"schema_version":"1.0","source":{"id":"2103.05148","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.05148","created_at":"2026-07-05T02:37:45Z"},{"alias_kind":"arxiv_version","alias_value":"2103.05148v2","created_at":"2026-07-05T02:37:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.05148","created_at":"2026-07-05T02:37:45Z"},{"alias_kind":"pith_short_12","alias_value":"Y4HIAPRTKLC2","created_at":"2026-07-05T02:37:45Z"},{"alias_kind":"pith_short_16","alias_value":"Y4HIAPRTKLC2PNPB","created_at":"2026-07-05T02:37:45Z"},{"alias_kind":"pith_short_8","alias_value":"Y4HIAPRT","created_at":"2026-07-05T02:37:45Z"}],"graph_snapshots":[{"event_id":"sha256:cad4a8442596bd08df692059abb610cca39c09a05af2e9ecbf369bd8ab1bf467","target":"graph","created_at":"2026-07-05T02:37:45Z","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/2103.05148/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Habitable zone Planet Finder (HPF) is a fiber fed precise radial velocity spectrograph at the 10 m Hobby Eberly Telescope (HET). Due to its fixed altitude design, the HET pupil changes appreciably across a track, leading to significant changes of the fiber far-field illumination. HPF's fiber scrambler is designed to suppress the impact of these illumination changes on the radial velocities -- but the residual impact on the radial velocity measurements has yet to be probed on sky. We use GJ 411, a bright early type (M2) M dwarf to probe the effects of far-field input trends due to these pup","authors_text":"Andrew J. Metcalf, Andrew Monson, Arpita Roy, Chad F. Bender, Christian Schwab, Eric B. Ford, Fred Hearty, Gudmundur Stefansson, Jason T. Wright, Joe P. Ninan, Lawrence W. Ramsey, Michael Endl, Niv Drory, Paul Robertson, Ryan C. Terrien, Samuel Halverson, Scott A. Diddams, Shubham Kanodia, Steven Janowiecki, Suvrath Mahadevan, William D. Cochran","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-03-09T00:15:00Z","title":"A Harsh Test of Far-Field Scrambling with the Habitable Zone Planet Finder and the Hobby Eberly Telescope"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.05148","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":"sha256:464a3faa5659b985f1315bda5a246ac637e0b14a1915f8670372bfeb64b84373","target":"record","created_at":"2026-07-05T02:37:45Z","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":"ac3cc3ed35230756e2a776cb5c3eb42368c87171471282648e3b1cb58f34c367","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-03-09T00:15:00Z","title_canon_sha256":"a68b6772a8204904baafb226eb349318aec822602a1adbbecc9111002300274f"},"schema_version":"1.0","source":{"id":"2103.05148","kind":"arxiv","version":2}},"canonical_sha256":"c70e803e3352c5a7b5e15790a5f26654883ef7dff6dac5ced8e1e9a7f6933218","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c70e803e3352c5a7b5e15790a5f26654883ef7dff6dac5ced8e1e9a7f6933218","first_computed_at":"2026-07-05T02:37:45.234498Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:37:45.234498Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Y+z2R/JvXGmsM78N1FMatSeBVwyMYfhnYK/XZS4+CmN3OtcUJQyMK4KZuzz2bL/TMzDR5WbiWBJEYRDW9pARAw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:37:45.234989Z","signed_message":"canonical_sha256_bytes"},"source_id":"2103.05148","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:464a3faa5659b985f1315bda5a246ac637e0b14a1915f8670372bfeb64b84373","sha256:cad4a8442596bd08df692059abb610cca39c09a05af2e9ecbf369bd8ab1bf467"],"state_sha256":"bf2a3863a9ae4a3a180ded68cf3912a7af736a6fcd7847d3675dc5f59a45d15c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UtKoCpI5e53x1m1H0QaxZ/Z065jgrrKAU7wZ9kFeJf+fZyq2hMQ05+zIJoAzxGgtCrmY5M3gJo81ZqCfHCmrBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T20:56:51.480647Z","bundle_sha256":"f3f268f990f6f33b219d46f9fa71fc780c6c2861c8fcbd7fc5ca1d4088c2de1f"}}