{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:47CD5RODIG7RWMYULHK4XQA7H2","short_pith_number":"pith:47CD5ROD","canonical_record":{"source":{"id":"1501.01398","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-01-07T08:58:55Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"74539512a0b594690d047ff79467b750f66cfadcd579d45d9f79bdfee59acc0f","abstract_canon_sha256":"d8dcdf8fece735b8c580e0ff1901fe8b23c76150418ccc0689f3ed540c7916d9"},"schema_version":"1.0"},"canonical_sha256":"e7c43ec5c341bf1b331459d5cbc01f3e995e3248a9ee83bad9754f1aaebf51cc","source":{"kind":"arxiv","id":"1501.01398","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.01398","created_at":"2026-05-18T01:11:33Z"},{"alias_kind":"arxiv_version","alias_value":"1501.01398v2","created_at":"2026-05-18T01:11:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.01398","created_at":"2026-05-18T01:11:33Z"},{"alias_kind":"pith_short_12","alias_value":"47CD5RODIG7R","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"47CD5RODIG7RWMYU","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"47CD5ROD","created_at":"2026-05-18T12:29:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:47CD5RODIG7RWMYULHK4XQA7H2","target":"record","payload":{"canonical_record":{"source":{"id":"1501.01398","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-01-07T08:58:55Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"74539512a0b594690d047ff79467b750f66cfadcd579d45d9f79bdfee59acc0f","abstract_canon_sha256":"d8dcdf8fece735b8c580e0ff1901fe8b23c76150418ccc0689f3ed540c7916d9"},"schema_version":"1.0"},"canonical_sha256":"e7c43ec5c341bf1b331459d5cbc01f3e995e3248a9ee83bad9754f1aaebf51cc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:11:33.705969Z","signature_b64":"swQBiG0FBzBp2H1k22DcvrjONGVcVBvpMJg+KHQdUEUrXdTJOIXVV4S5Jk5UMaK4Q3oHsGsNcO4AZo67NQXmBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e7c43ec5c341bf1b331459d5cbc01f3e995e3248a9ee83bad9754f1aaebf51cc","last_reissued_at":"2026-05-18T01:11:33.705593Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:11:33.705593Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1501.01398","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":"2026-05-18T01:11:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EiHYw3pWcfAvoIz1JUfK/4lDVcQRSgMxLT/vnVfDkPnNnqtZZ4QyIePJcBSwJjCLIdHJyH3oTEHeKMS+xC2OAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T03:46:12.705677Z"},"content_sha256":"069651c0798715c3994f676f4b27df7fc6084b6dd2d613157b16eb725a862386","schema_version":"1.0","event_id":"sha256:069651c0798715c3994f676f4b27df7fc6084b6dd2d613157b16eb725a862386"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:47CD5RODIG7RWMYULHK4XQA7H2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Can We Detect the Color-Density Relation with Photometric Redshifts?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Alex Merson, Carlton Baugh, Chin-Wei Chen, Chuan-Chin Lai, Hung-Yu Jian, Lihwai Lin, Sebastien Foucaud, Tzi-Hong Chiueh, Wen-Ping Chen","submitted_at":"2015-01-07T08:58:55Z","abstract_excerpt":"A variety of methods have been proposed to define and to quantify galaxy environments. While these techniques work well in general with spectroscopic redshift samples, their application to photometric redshift surveys remains uncertain. To investigate whether galaxy environments can be robustly measured with photo-z samples, we quantify how the density measured with the nearest neighbor approach is affected by photo-z uncertainties by using the Durham mock galaxy catalogs in which the 3D real-space environments and the properties of galaxies are exactly known. Furthermore, we present an optimi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.01398","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":""},"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":"2026-05-18T01:11:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iJeEl8XinB6PEPE5sQ0XY44BOaQMumWdKOoKeJAZptjPPRGvazYn/bfyNOv/MEvovP9KnBLaunFauHirXx8sBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T03:46:12.706017Z"},"content_sha256":"eecd92ff73876abb2581b1658df1ec7ee23e2d531279c939eca2da1acc0a7a1b","schema_version":"1.0","event_id":"sha256:eecd92ff73876abb2581b1658df1ec7ee23e2d531279c939eca2da1acc0a7a1b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/47CD5RODIG7RWMYULHK4XQA7H2/bundle.json","state_url":"https://pith.science/pith/47CD5RODIG7RWMYULHK4XQA7H2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/47CD5RODIG7RWMYULHK4XQA7H2/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":"2026-06-01T03:46:12Z","links":{"resolver":"https://pith.science/pith/47CD5RODIG7RWMYULHK4XQA7H2","bundle":"https://pith.science/pith/47CD5RODIG7RWMYULHK4XQA7H2/bundle.json","state":"https://pith.science/pith/47CD5RODIG7RWMYULHK4XQA7H2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/47CD5RODIG7RWMYULHK4XQA7H2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:47CD5RODIG7RWMYULHK4XQA7H2","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":"d8dcdf8fece735b8c580e0ff1901fe8b23c76150418ccc0689f3ed540c7916d9","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-01-07T08:58:55Z","title_canon_sha256":"74539512a0b594690d047ff79467b750f66cfadcd579d45d9f79bdfee59acc0f"},"schema_version":"1.0","source":{"id":"1501.01398","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.01398","created_at":"2026-05-18T01:11:33Z"},{"alias_kind":"arxiv_version","alias_value":"1501.01398v2","created_at":"2026-05-18T01:11:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.01398","created_at":"2026-05-18T01:11:33Z"},{"alias_kind":"pith_short_12","alias_value":"47CD5RODIG7R","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"47CD5RODIG7RWMYU","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"47CD5ROD","created_at":"2026-05-18T12:29:05Z"}],"graph_snapshots":[{"event_id":"sha256:eecd92ff73876abb2581b1658df1ec7ee23e2d531279c939eca2da1acc0a7a1b","target":"graph","created_at":"2026-05-18T01:11:33Z","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":"A variety of methods have been proposed to define and to quantify galaxy environments. While these techniques work well in general with spectroscopic redshift samples, their application to photometric redshift surveys remains uncertain. To investigate whether galaxy environments can be robustly measured with photo-z samples, we quantify how the density measured with the nearest neighbor approach is affected by photo-z uncertainties by using the Durham mock galaxy catalogs in which the 3D real-space environments and the properties of galaxies are exactly known. Furthermore, we present an optimi","authors_text":"Alex Merson, Carlton Baugh, Chin-Wei Chen, Chuan-Chin Lai, Hung-Yu Jian, Lihwai Lin, Sebastien Foucaud, Tzi-Hong Chiueh, Wen-Ping Chen","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-01-07T08:58:55Z","title":"Can We Detect the Color-Density Relation with Photometric Redshifts?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.01398","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":"sha256:069651c0798715c3994f676f4b27df7fc6084b6dd2d613157b16eb725a862386","target":"record","created_at":"2026-05-18T01:11:33Z","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":"d8dcdf8fece735b8c580e0ff1901fe8b23c76150418ccc0689f3ed540c7916d9","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-01-07T08:58:55Z","title_canon_sha256":"74539512a0b594690d047ff79467b750f66cfadcd579d45d9f79bdfee59acc0f"},"schema_version":"1.0","source":{"id":"1501.01398","kind":"arxiv","version":2}},"canonical_sha256":"e7c43ec5c341bf1b331459d5cbc01f3e995e3248a9ee83bad9754f1aaebf51cc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e7c43ec5c341bf1b331459d5cbc01f3e995e3248a9ee83bad9754f1aaebf51cc","first_computed_at":"2026-05-18T01:11:33.705593Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:33.705593Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"swQBiG0FBzBp2H1k22DcvrjONGVcVBvpMJg+KHQdUEUrXdTJOIXVV4S5Jk5UMaK4Q3oHsGsNcO4AZo67NQXmBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:33.705969Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.01398","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:069651c0798715c3994f676f4b27df7fc6084b6dd2d613157b16eb725a862386","sha256:eecd92ff73876abb2581b1658df1ec7ee23e2d531279c939eca2da1acc0a7a1b"],"state_sha256":"6ce7465be384e47951c776ba0be319957e2320440fd7c232d286a4ff911d944f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ygtjCaIhZOyRwQeuAGpMR2HrrtV42tbfUlQk6mezxjX0qAcdVLgTp+Ep6HPWWm9NME7lahqqABYFz5hLfVr3AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T03:46:12.708004Z","bundle_sha256":"202647f484b1f49510e88214d1ac7da6c71ba839e461dd67f58ebde68288ee77"}}