{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2010:AVK6GZ5SYUCW4CU2MHATJCLCMI","short_pith_number":"pith:AVK6GZ5S","schema_version":"1.0","canonical_sha256":"0555e367b2c5056e0a9a61c134896262320c9244e6227b35f141102ef6b225f8","source":{"kind":"arxiv","id":"1004.2932","version":1},"attestation_state":"computed","paper":{"title":"On-Sky Demonstration of a Linear Band-limited Mask with Application to Visual Binary Stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.IM","authors_text":"Eugene Serabyn, Ivan Kravchenko, Jian Ge, Joseph Carson, Justin R. Crepp","submitted_at":"2010-04-16T23:00:05Z","abstract_excerpt":"We have designed and built the first band-limited coronagraphic mask used for ground-based high-contrast imaging observations. The mask resides in the focal plane of the near-infrared camera PHARO at the Palomar Hale telescope and receives a well-corrected beam from an extreme adaptive optics system. Its performance on-sky with single stars is comparable to current state-of-the-art instruments: contrast levels of $\\sim10^{-5}$ or better at 0.8\" in $K_s$ after post-processing, depending on how well non-common-path errors are calibrated. However, given the mask's linear geometry, we are able to "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1004.2932","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2010-04-16T23:00:05Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"1731185bd6b653db44ffd10eb2e3f763de70d79aeffb1f9c93d4beb04b421c98","abstract_canon_sha256":"ee82139ea85afe6fe2dce3b826178115d552044c89b5b7e4dc3f9454a97bb2bf"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:07:57.271915Z","signature_b64":"i/55sIVmElpRDoT7G+mmaZZYs7LFxlGtkJv1LbvcZtcl5SawAj3A9ZccWqeMgSAnGeMNdbbbSfu31YRAC46kAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0555e367b2c5056e0a9a61c134896262320c9244e6227b35f141102ef6b225f8","last_reissued_at":"2026-05-18T02:07:57.271394Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:07:57.271394Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"On-Sky Demonstration of a Linear Band-limited Mask with Application to Visual Binary Stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.IM","authors_text":"Eugene Serabyn, Ivan Kravchenko, Jian Ge, Joseph Carson, Justin R. Crepp","submitted_at":"2010-04-16T23:00:05Z","abstract_excerpt":"We have designed and built the first band-limited coronagraphic mask used for ground-based high-contrast imaging observations. The mask resides in the focal plane of the near-infrared camera PHARO at the Palomar Hale telescope and receives a well-corrected beam from an extreme adaptive optics system. Its performance on-sky with single stars is comparable to current state-of-the-art instruments: contrast levels of $\\sim10^{-5}$ or better at 0.8\" in $K_s$ after post-processing, depending on how well non-common-path errors are calibrated. However, given the mask's linear geometry, we are able to "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.2932","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1004.2932","created_at":"2026-05-18T02:07:57.271480+00:00"},{"alias_kind":"arxiv_version","alias_value":"1004.2932v1","created_at":"2026-05-18T02:07:57.271480+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1004.2932","created_at":"2026-05-18T02:07:57.271480+00:00"},{"alias_kind":"pith_short_12","alias_value":"AVK6GZ5SYUCW","created_at":"2026-05-18T12:26:05.355336+00:00"},{"alias_kind":"pith_short_16","alias_value":"AVK6GZ5SYUCW4CU2","created_at":"2026-05-18T12:26:05.355336+00:00"},{"alias_kind":"pith_short_8","alias_value":"AVK6GZ5S","created_at":"2026-05-18T12:26:05.355336+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/AVK6GZ5SYUCW4CU2MHATJCLCMI","json":"https://pith.science/pith/AVK6GZ5SYUCW4CU2MHATJCLCMI.json","graph_json":"https://pith.science/api/pith-number/AVK6GZ5SYUCW4CU2MHATJCLCMI/graph.json","events_json":"https://pith.science/api/pith-number/AVK6GZ5SYUCW4CU2MHATJCLCMI/events.json","paper":"https://pith.science/paper/AVK6GZ5S"},"agent_actions":{"view_html":"https://pith.science/pith/AVK6GZ5SYUCW4CU2MHATJCLCMI","download_json":"https://pith.science/pith/AVK6GZ5SYUCW4CU2MHATJCLCMI.json","view_paper":"https://pith.science/paper/AVK6GZ5S","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1004.2932&json=true","fetch_graph":"https://pith.science/api/pith-number/AVK6GZ5SYUCW4CU2MHATJCLCMI/graph.json","fetch_events":"https://pith.science/api/pith-number/AVK6GZ5SYUCW4CU2MHATJCLCMI/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/AVK6GZ5SYUCW4CU2MHATJCLCMI/action/timestamp_anchor","attest_storage":"https://pith.science/pith/AVK6GZ5SYUCW4CU2MHATJCLCMI/action/storage_attestation","attest_author":"https://pith.science/pith/AVK6GZ5SYUCW4CU2MHATJCLCMI/action/author_attestation","sign_citation":"https://pith.science/pith/AVK6GZ5SYUCW4CU2MHATJCLCMI/action/citation_signature","submit_replication":"https://pith.science/pith/AVK6GZ5SYUCW4CU2MHATJCLCMI/action/replication_record"}},"created_at":"2026-05-18T02:07:57.271480+00:00","updated_at":"2026-05-18T02:07:57.271480+00:00"}