{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:R7ZDID6IX4BOVLTJCJACF2OKDT","short_pith_number":"pith:R7ZDID6I","canonical_record":{"source":{"id":"2104.05676","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-04-12T17:41:55Z","cross_cats_sorted":[],"title_canon_sha256":"823108ad41bf17f48dbc99e1a7a87a047ca9fcd5b3abdfc9beeb0f53d7198b0a","abstract_canon_sha256":"9e31ba6fadfeb8e9c659d2fe9be2e3cc20bdf79b57fab683ba696c81c80c9ae9"},"schema_version":"1.0"},"canonical_sha256":"8ff2340fc8bf02eaae69124022e9ca1cd5e13705fbfa32660c2cdda205fbc652","source":{"kind":"arxiv","id":"2104.05676","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.05676","created_at":"2026-07-05T04:12:01Z"},{"alias_kind":"arxiv_version","alias_value":"2104.05676v1","created_at":"2026-07-05T04:12:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.05676","created_at":"2026-07-05T04:12:01Z"},{"alias_kind":"pith_short_12","alias_value":"R7ZDID6IX4BO","created_at":"2026-07-05T04:12:01Z"},{"alias_kind":"pith_short_16","alias_value":"R7ZDID6IX4BOVLTJ","created_at":"2026-07-05T04:12:01Z"},{"alias_kind":"pith_short_8","alias_value":"R7ZDID6I","created_at":"2026-07-05T04:12:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:R7ZDID6IX4BOVLTJCJACF2OKDT","target":"record","payload":{"canonical_record":{"source":{"id":"2104.05676","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-04-12T17:41:55Z","cross_cats_sorted":[],"title_canon_sha256":"823108ad41bf17f48dbc99e1a7a87a047ca9fcd5b3abdfc9beeb0f53d7198b0a","abstract_canon_sha256":"9e31ba6fadfeb8e9c659d2fe9be2e3cc20bdf79b57fab683ba696c81c80c9ae9"},"schema_version":"1.0"},"canonical_sha256":"8ff2340fc8bf02eaae69124022e9ca1cd5e13705fbfa32660c2cdda205fbc652","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:12:01.373395Z","signature_b64":"Rk+9ZMJ3pZoCuy9mMaKuFELY9J9r6nomUaskfM699OsrqB8ax2UGxKec43StufWtbjwjufv0mi0S0RY+Hgf2Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8ff2340fc8bf02eaae69124022e9ca1cd5e13705fbfa32660c2cdda205fbc652","last_reissued_at":"2026-07-05T04:12:01.372969Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:12:01.372969Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2104.05676","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":"2026-07-05T04:12:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EJpbjcslWpIXZuaXCyC4OO0+gbqLvtRe/HUpLSGn8/GasOJrzXoGrTqfMOYYnJ8ehzK/vPrG8lRulllbnwrqCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T19:09:59.574494Z"},"content_sha256":"58dbf1fcd3c37bcebdb28a8a0de271fc31dce3c0254528ed4e9061a258a2fc33","schema_version":"1.0","event_id":"sha256:58dbf1fcd3c37bcebdb28a8a0de271fc31dce3c0254528ed4e9061a258a2fc33"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:R7ZDID6IX4BOVLTJCJACF2OKDT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Impact of Observing Strategy on Cosmological Constraints with LSST","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Alex G. Kim, Christian N. Setzer, Christopher Stubbs (for the LSST Dark Energy Science Collaboration), Daniel Rothchild, Dan Scolnic, Eric Gawiser, Eric Neilsen, Hiranya Peiris, Humna Awan, Husni Almoubayyed, Isobel Hook, Marc Moniez, Michelle Lochner, Nicolas Regnault, Peter Yoachim, Philippe Gris, Phil Marshall, Rachel Mandelbaum, Rahul Biswas, R. Lynne Jones, Satya Gontcho A Gontcho, Saurabh W. Jha, Sherry H. Suyu, Simon Huber, Tanja Petrushevska, Timo Anguita, Tristan Blaineau","submitted_at":"2021-04-12T17:41:55Z","abstract_excerpt":"The generation-defining Vera C. Rubin Observatory will make state-of-the-art measurements of both the static and transient universe through its Legacy Survey for Space and Time (LSST). With such capabilities, it is immensely challenging to optimize the LSST observing strategy across the survey's wide range of science drivers. Many aspects of the LSST observing strategy relevant to the LSST Dark Energy Science Collaboration, such as survey footprint definition, single visit exposure time and the cadence of repeat visits in different filters, are yet to be finalized. Here, we present metrics use"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.05676","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2104.05676/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":"2026-07-05T04:12:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fH7cAZm0EBy7UQbvPdUE7O8RXApRgPZxsLTPy2Uat3YvncTZ1JpjieUBZr93wR5YlMnaJgjO1TPq9jkbi/NECQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T19:09:59.574992Z"},"content_sha256":"7d42f2d8c2a7321c627c221778ff2908e1a92a43ddad1f0359f0e6e735779164","schema_version":"1.0","event_id":"sha256:7d42f2d8c2a7321c627c221778ff2908e1a92a43ddad1f0359f0e6e735779164"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/R7ZDID6IX4BOVLTJCJACF2OKDT/bundle.json","state_url":"https://pith.science/pith/R7ZDID6IX4BOVLTJCJACF2OKDT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/R7ZDID6IX4BOVLTJCJACF2OKDT/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":"2026-08-23T19:09:59Z","links":{"resolver":"https://pith.science/pith/R7ZDID6IX4BOVLTJCJACF2OKDT","bundle":"https://pith.science/pith/R7ZDID6IX4BOVLTJCJACF2OKDT/bundle.json","state":"https://pith.science/pith/R7ZDID6IX4BOVLTJCJACF2OKDT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/R7ZDID6IX4BOVLTJCJACF2OKDT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:R7ZDID6IX4BOVLTJCJACF2OKDT","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":"9e31ba6fadfeb8e9c659d2fe9be2e3cc20bdf79b57fab683ba696c81c80c9ae9","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-04-12T17:41:55Z","title_canon_sha256":"823108ad41bf17f48dbc99e1a7a87a047ca9fcd5b3abdfc9beeb0f53d7198b0a"},"schema_version":"1.0","source":{"id":"2104.05676","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.05676","created_at":"2026-07-05T04:12:01Z"},{"alias_kind":"arxiv_version","alias_value":"2104.05676v1","created_at":"2026-07-05T04:12:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.05676","created_at":"2026-07-05T04:12:01Z"},{"alias_kind":"pith_short_12","alias_value":"R7ZDID6IX4BO","created_at":"2026-07-05T04:12:01Z"},{"alias_kind":"pith_short_16","alias_value":"R7ZDID6IX4BOVLTJ","created_at":"2026-07-05T04:12:01Z"},{"alias_kind":"pith_short_8","alias_value":"R7ZDID6I","created_at":"2026-07-05T04:12:01Z"}],"graph_snapshots":[{"event_id":"sha256:7d42f2d8c2a7321c627c221778ff2908e1a92a43ddad1f0359f0e6e735779164","target":"graph","created_at":"2026-07-05T04:12:01Z","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/2104.05676/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The generation-defining Vera C. Rubin Observatory will make state-of-the-art measurements of both the static and transient universe through its Legacy Survey for Space and Time (LSST). With such capabilities, it is immensely challenging to optimize the LSST observing strategy across the survey's wide range of science drivers. Many aspects of the LSST observing strategy relevant to the LSST Dark Energy Science Collaboration, such as survey footprint definition, single visit exposure time and the cadence of repeat visits in different filters, are yet to be finalized. Here, we present metrics use","authors_text":"Alex G. Kim, Christian N. Setzer, Christopher Stubbs (for the LSST Dark Energy Science Collaboration), Daniel Rothchild, Dan Scolnic, Eric Gawiser, Eric Neilsen, Hiranya Peiris, Humna Awan, Husni Almoubayyed, Isobel Hook, Marc Moniez, Michelle Lochner, Nicolas Regnault, Peter Yoachim, Philippe Gris, Phil Marshall, Rachel Mandelbaum, Rahul Biswas, R. Lynne Jones, Satya Gontcho A Gontcho, Saurabh W. Jha, Sherry H. Suyu, Simon Huber, Tanja Petrushevska, Timo Anguita, Tristan Blaineau","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-04-12T17:41:55Z","title":"The Impact of Observing Strategy on Cosmological Constraints with LSST"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.05676","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":"sha256:58dbf1fcd3c37bcebdb28a8a0de271fc31dce3c0254528ed4e9061a258a2fc33","target":"record","created_at":"2026-07-05T04:12:01Z","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":"9e31ba6fadfeb8e9c659d2fe9be2e3cc20bdf79b57fab683ba696c81c80c9ae9","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-04-12T17:41:55Z","title_canon_sha256":"823108ad41bf17f48dbc99e1a7a87a047ca9fcd5b3abdfc9beeb0f53d7198b0a"},"schema_version":"1.0","source":{"id":"2104.05676","kind":"arxiv","version":1}},"canonical_sha256":"8ff2340fc8bf02eaae69124022e9ca1cd5e13705fbfa32660c2cdda205fbc652","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8ff2340fc8bf02eaae69124022e9ca1cd5e13705fbfa32660c2cdda205fbc652","first_computed_at":"2026-07-05T04:12:01.372969Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:12:01.372969Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Rk+9ZMJ3pZoCuy9mMaKuFELY9J9r6nomUaskfM699OsrqB8ax2UGxKec43StufWtbjwjufv0mi0S0RY+Hgf2Dw==","signature_status":"signed_v1","signed_at":"2026-07-05T04:12:01.373395Z","signed_message":"canonical_sha256_bytes"},"source_id":"2104.05676","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:58dbf1fcd3c37bcebdb28a8a0de271fc31dce3c0254528ed4e9061a258a2fc33","sha256:7d42f2d8c2a7321c627c221778ff2908e1a92a43ddad1f0359f0e6e735779164"],"state_sha256":"552c2d9a76391b41ecff67f1614c64196e28161837565c918d0156d9f188af55"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UG/YHvSX9sEtbgs/FB/87zbhk6TEuMDZsvihpulTiTpkIdfTOpKLbtuaj0whNEI6vZaEAwT1seERJ09t83rTAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-23T19:09:59.579774Z","bundle_sha256":"60ab3ceaa40118e820ba6487d8efb3e24b6c0b2aa1d018921a98c870fa583132"}}