{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:3YGRMR2SRP5ZVTXXQW7LM7C5BT","short_pith_number":"pith:3YGRMR2S","canonical_record":{"source":{"id":"2011.07070","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-11-13T19:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"b9c3fb73b5e1ed9991bcac18540ea2f31c259eb44a613e0c6343c76e6a1f1722","abstract_canon_sha256":"e7e03ceeb781eb2b8c8542e117cf97b3f5e63760022453790a4d1aa93a4fd19e"},"schema_version":"1.0"},"canonical_sha256":"de0d1647528bfb9acef785beb67c5d0ce0dcf1d2f9d09334f0f41b65c0607791","source":{"kind":"arxiv","id":"2011.07070","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.07070","created_at":"2026-07-05T02:46:01Z"},{"alias_kind":"arxiv_version","alias_value":"2011.07070v2","created_at":"2026-07-05T02:46:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.07070","created_at":"2026-07-05T02:46:01Z"},{"alias_kind":"pith_short_12","alias_value":"3YGRMR2SRP5Z","created_at":"2026-07-05T02:46:01Z"},{"alias_kind":"pith_short_16","alias_value":"3YGRMR2SRP5ZVTXX","created_at":"2026-07-05T02:46:01Z"},{"alias_kind":"pith_short_8","alias_value":"3YGRMR2S","created_at":"2026-07-05T02:46:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:3YGRMR2SRP5ZVTXXQW7LM7C5BT","target":"record","payload":{"canonical_record":{"source":{"id":"2011.07070","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-11-13T19:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"b9c3fb73b5e1ed9991bcac18540ea2f31c259eb44a613e0c6343c76e6a1f1722","abstract_canon_sha256":"e7e03ceeb781eb2b8c8542e117cf97b3f5e63760022453790a4d1aa93a4fd19e"},"schema_version":"1.0"},"canonical_sha256":"de0d1647528bfb9acef785beb67c5d0ce0dcf1d2f9d09334f0f41b65c0607791","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:46:01.487963Z","signature_b64":"wX9Dl7aXbhZ7l9WoBDPIrLP5i6PfoDw/e5zhFZCtN4A47CCYlmBMQG4a0rbTlOJAKVc2yDTwvGYO8LmFpxBrCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"de0d1647528bfb9acef785beb67c5d0ce0dcf1d2f9d09334f0f41b65c0607791","last_reissued_at":"2026-07-05T02:46:01.487508Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:46:01.487508Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2011.07070","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":"2026-07-05T02:46:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0hbTzaW4zX7GGDI+hh2JtY+EjC8HoMyyjU9SN4Sngkr6OU8897VK45S6FtKj3K6gYAf2YVaqrrCsP8PUZdiUCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-26T14:20:49.994168Z"},"content_sha256":"7390fc519a3eb75a6bd4bf6e4e82a980e539f55679948da9e0303096ec74aa72","schema_version":"1.0","event_id":"sha256:7390fc519a3eb75a6bd4bf6e4e82a980e539f55679948da9e0303096ec74aa72"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:3YGRMR2SRP5ZVTXXQW7LM7C5BT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spectroscopic Quantification of Projection Effects in the SDSS redMaPPer Galaxy Cluster Catalogue","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. B. Mantz, A. Kremin, C. To, D. Gruen, E. R. Carrasco, E. Rozo, E. Rykoff, J. DeRose, J. Myles, M. Costanzi, R. G. Morris, R. H. Wechsler, R. Kron, S. W. Allen, T. Jeltema","submitted_at":"2020-11-13T19:00:00Z","abstract_excerpt":"Projection effects, whereby galaxies along the line-of-sight to a galaxy cluster are mistakenly associated with the cluster halo, present a significant challenge for optical cluster cosmology. We use statistically representative spectral coverage of luminous galaxies to investigate how projection effects impact the low-redshift limit of the Sloan Digital Sky Survey (SDSS) redMaPPer galaxy cluster catalogue. Spectroscopic redshifts enable us to differentiate true cluster members from false positives and determine the fraction of candidate cluster members viewed in projection. Our main results c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.07070","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/2011.07070/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":"2026-07-05T02:46:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"32Wl2i/rtra2YmBgGfgw5ppi/Qu3IffdgLxGqvgvusF+KUb9IT3AvwgR3B7qvGqvO3x9OTq9Lr2OpfakJ5bIBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-26T14:20:49.994556Z"},"content_sha256":"ca8435143cee8804f60c09a02477b9673e90cd4b440b2195f038b457884516eb","schema_version":"1.0","event_id":"sha256:ca8435143cee8804f60c09a02477b9673e90cd4b440b2195f038b457884516eb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3YGRMR2SRP5ZVTXXQW7LM7C5BT/bundle.json","state_url":"https://pith.science/pith/3YGRMR2SRP5ZVTXXQW7LM7C5BT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3YGRMR2SRP5ZVTXXQW7LM7C5BT/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":"2026-07-26T14:20:49Z","links":{"resolver":"https://pith.science/pith/3YGRMR2SRP5ZVTXXQW7LM7C5BT","bundle":"https://pith.science/pith/3YGRMR2SRP5ZVTXXQW7LM7C5BT/bundle.json","state":"https://pith.science/pith/3YGRMR2SRP5ZVTXXQW7LM7C5BT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3YGRMR2SRP5ZVTXXQW7LM7C5BT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:3YGRMR2SRP5ZVTXXQW7LM7C5BT","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":"e7e03ceeb781eb2b8c8542e117cf97b3f5e63760022453790a4d1aa93a4fd19e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-11-13T19:00:00Z","title_canon_sha256":"b9c3fb73b5e1ed9991bcac18540ea2f31c259eb44a613e0c6343c76e6a1f1722"},"schema_version":"1.0","source":{"id":"2011.07070","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.07070","created_at":"2026-07-05T02:46:01Z"},{"alias_kind":"arxiv_version","alias_value":"2011.07070v2","created_at":"2026-07-05T02:46:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.07070","created_at":"2026-07-05T02:46:01Z"},{"alias_kind":"pith_short_12","alias_value":"3YGRMR2SRP5Z","created_at":"2026-07-05T02:46:01Z"},{"alias_kind":"pith_short_16","alias_value":"3YGRMR2SRP5ZVTXX","created_at":"2026-07-05T02:46:01Z"},{"alias_kind":"pith_short_8","alias_value":"3YGRMR2S","created_at":"2026-07-05T02:46:01Z"}],"graph_snapshots":[{"event_id":"sha256:ca8435143cee8804f60c09a02477b9673e90cd4b440b2195f038b457884516eb","target":"graph","created_at":"2026-07-05T02:46:01Z","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/2011.07070/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Projection effects, whereby galaxies along the line-of-sight to a galaxy cluster are mistakenly associated with the cluster halo, present a significant challenge for optical cluster cosmology. We use statistically representative spectral coverage of luminous galaxies to investigate how projection effects impact the low-redshift limit of the Sloan Digital Sky Survey (SDSS) redMaPPer galaxy cluster catalogue. Spectroscopic redshifts enable us to differentiate true cluster members from false positives and determine the fraction of candidate cluster members viewed in projection. Our main results c","authors_text":"A. B. Mantz, A. Kremin, C. To, D. Gruen, E. R. Carrasco, E. Rozo, E. Rykoff, J. DeRose, J. Myles, M. Costanzi, R. G. Morris, R. H. Wechsler, R. Kron, S. W. Allen, T. Jeltema","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-11-13T19:00:00Z","title":"Spectroscopic Quantification of Projection Effects in the SDSS redMaPPer Galaxy Cluster Catalogue"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.07070","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":"sha256:7390fc519a3eb75a6bd4bf6e4e82a980e539f55679948da9e0303096ec74aa72","target":"record","created_at":"2026-07-05T02:46:01Z","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":"e7e03ceeb781eb2b8c8542e117cf97b3f5e63760022453790a4d1aa93a4fd19e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-11-13T19:00:00Z","title_canon_sha256":"b9c3fb73b5e1ed9991bcac18540ea2f31c259eb44a613e0c6343c76e6a1f1722"},"schema_version":"1.0","source":{"id":"2011.07070","kind":"arxiv","version":2}},"canonical_sha256":"de0d1647528bfb9acef785beb67c5d0ce0dcf1d2f9d09334f0f41b65c0607791","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"de0d1647528bfb9acef785beb67c5d0ce0dcf1d2f9d09334f0f41b65c0607791","first_computed_at":"2026-07-05T02:46:01.487508Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:46:01.487508Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wX9Dl7aXbhZ7l9WoBDPIrLP5i6PfoDw/e5zhFZCtN4A47CCYlmBMQG4a0rbTlOJAKVc2yDTwvGYO8LmFpxBrCg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:46:01.487963Z","signed_message":"canonical_sha256_bytes"},"source_id":"2011.07070","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7390fc519a3eb75a6bd4bf6e4e82a980e539f55679948da9e0303096ec74aa72","sha256:ca8435143cee8804f60c09a02477b9673e90cd4b440b2195f038b457884516eb"],"state_sha256":"7807a499c887771d5494ef48ee9c510c863a741b267ee7db7158c3fc228055af"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+C0+B13nUD2NOlkSXzxbQlpPPJ3o97gAKBZkOUeTfCzbR7o+Q06VqlLPh5Vo7PC0MgEkCOrq7d9tpjSTogJqBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-26T14:20:49.997115Z","bundle_sha256":"1bf5ca98108add578676bfc68755181934b4ac50a9c74d397c18130e6e85dc2b"}}