{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:L6K26E23V5LFJ25Z6VKHSBIF4O","short_pith_number":"pith:L6K26E23","canonical_record":{"source":{"id":"1804.08277","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-23T08:23:00Z","cross_cats_sorted":[],"title_canon_sha256":"2dfcd58e3e445938b609df33dbbb79c27b175023fa538a4bd9c677404f12c648","abstract_canon_sha256":"87af55f73cbed49cbc0c37eb33506a28945aa82f6564bd252febfa2bff4b49b3"},"schema_version":"1.0"},"canonical_sha256":"5f95af135baf5654ebb9f554790505e3885f48591ed8bdfa174f77449d4d579b","source":{"kind":"arxiv","id":"1804.08277","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.08277","created_at":"2026-05-18T00:02:35Z"},{"alias_kind":"arxiv_version","alias_value":"1804.08277v1","created_at":"2026-05-18T00:02:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.08277","created_at":"2026-05-18T00:02:35Z"},{"alias_kind":"pith_short_12","alias_value":"L6K26E23V5LF","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_16","alias_value":"L6K26E23V5LFJ25Z","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_8","alias_value":"L6K26E23","created_at":"2026-05-18T12:32:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:L6K26E23V5LFJ25Z6VKHSBIF4O","target":"record","payload":{"canonical_record":{"source":{"id":"1804.08277","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-23T08:23:00Z","cross_cats_sorted":[],"title_canon_sha256":"2dfcd58e3e445938b609df33dbbb79c27b175023fa538a4bd9c677404f12c648","abstract_canon_sha256":"87af55f73cbed49cbc0c37eb33506a28945aa82f6564bd252febfa2bff4b49b3"},"schema_version":"1.0"},"canonical_sha256":"5f95af135baf5654ebb9f554790505e3885f48591ed8bdfa174f77449d4d579b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:02:35.139012Z","signature_b64":"CXuSR8pj3sCd6MBzpiFPvgI86JnfXeN14Kbjnsp/azF2pvVzT8m6dDsb+8He68u+c/qj0SYhiBj86O7+VHDKCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5f95af135baf5654ebb9f554790505e3885f48591ed8bdfa174f77449d4d579b","last_reissued_at":"2026-05-18T00:02:35.138372Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:02:35.138372Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.08277","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":"2026-05-18T00:02:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HGqCBFuaWTvzXin9n4P8WYj1MmuqNb/RYQE1VmVWw0iDAgiH4JgmTNV01TZXXPb9q3jKebt95FeG07muhnQmDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T02:20:34.471089Z"},"content_sha256":"26847cada1a9050929589f0e3b83d12e67be8e642d0c3ad08919f11a0dcecee9","schema_version":"1.0","event_id":"sha256:26847cada1a9050929589f0e3b83d12e67be8e642d0c3ad08919f11a0dcecee9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:L6K26E23V5LFJ25Z6VKHSBIF4O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Cluster AgeS Experiment (CASE). Detecting Photometric Variability with the Friends of Friends Algorithm","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"I.B. Thompson, M. Rozyczka, P. Pietrukowicz, W. Narloch, W. Pych","submitted_at":"2018-04-23T08:23:00Z","abstract_excerpt":"We adapt the friends of friends algorithm to the analysis of light curves, and show that it can be successfully applied to searches for transient phenomena in large photometric databases. As a test case we search OGLE-III light curves for known dwarf novae. A single combination of control parameters allows to narrow the search to 1% of the data while reaching a $\\sim$90% detection efficiency. A search involving $\\sim$2% of the data and three combinations of control parameters can be significantly more effective - in our case a 100% efficiency is reached.\n  The method can also quite efficiently"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.08277","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:02:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JTOV8Hlwdfr2csFOlvbEZ8Tt24T5u/KBsohCmoLHwa2N9oh7NdfE8W+H1i42IteeqrZ2Y11e/mNIwwMtajQoCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T02:20:34.471441Z"},"content_sha256":"c16718f0ea6aba4a5c6cbf2476a1a2e51d8fc0569da82dd4c0024342d0325f33","schema_version":"1.0","event_id":"sha256:c16718f0ea6aba4a5c6cbf2476a1a2e51d8fc0569da82dd4c0024342d0325f33"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/L6K26E23V5LFJ25Z6VKHSBIF4O/bundle.json","state_url":"https://pith.science/pith/L6K26E23V5LFJ25Z6VKHSBIF4O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/L6K26E23V5LFJ25Z6VKHSBIF4O/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":"2026-06-06T02:20:34Z","links":{"resolver":"https://pith.science/pith/L6K26E23V5LFJ25Z6VKHSBIF4O","bundle":"https://pith.science/pith/L6K26E23V5LFJ25Z6VKHSBIF4O/bundle.json","state":"https://pith.science/pith/L6K26E23V5LFJ25Z6VKHSBIF4O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/L6K26E23V5LFJ25Z6VKHSBIF4O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:L6K26E23V5LFJ25Z6VKHSBIF4O","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":"87af55f73cbed49cbc0c37eb33506a28945aa82f6564bd252febfa2bff4b49b3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-23T08:23:00Z","title_canon_sha256":"2dfcd58e3e445938b609df33dbbb79c27b175023fa538a4bd9c677404f12c648"},"schema_version":"1.0","source":{"id":"1804.08277","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.08277","created_at":"2026-05-18T00:02:35Z"},{"alias_kind":"arxiv_version","alias_value":"1804.08277v1","created_at":"2026-05-18T00:02:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.08277","created_at":"2026-05-18T00:02:35Z"},{"alias_kind":"pith_short_12","alias_value":"L6K26E23V5LF","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_16","alias_value":"L6K26E23V5LFJ25Z","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_8","alias_value":"L6K26E23","created_at":"2026-05-18T12:32:33Z"}],"graph_snapshots":[{"event_id":"sha256:c16718f0ea6aba4a5c6cbf2476a1a2e51d8fc0569da82dd4c0024342d0325f33","target":"graph","created_at":"2026-05-18T00:02:35Z","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":"We adapt the friends of friends algorithm to the analysis of light curves, and show that it can be successfully applied to searches for transient phenomena in large photometric databases. As a test case we search OGLE-III light curves for known dwarf novae. A single combination of control parameters allows to narrow the search to 1% of the data while reaching a $\\sim$90% detection efficiency. A search involving $\\sim$2% of the data and three combinations of control parameters can be significantly more effective - in our case a 100% efficiency is reached.\n  The method can also quite efficiently","authors_text":"I.B. Thompson, M. Rozyczka, P. Pietrukowicz, W. Narloch, W. Pych","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-23T08:23:00Z","title":"The Cluster AgeS Experiment (CASE). Detecting Photometric Variability with the Friends of Friends Algorithm"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.08277","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":"sha256:26847cada1a9050929589f0e3b83d12e67be8e642d0c3ad08919f11a0dcecee9","target":"record","created_at":"2026-05-18T00:02:35Z","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":"87af55f73cbed49cbc0c37eb33506a28945aa82f6564bd252febfa2bff4b49b3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-23T08:23:00Z","title_canon_sha256":"2dfcd58e3e445938b609df33dbbb79c27b175023fa538a4bd9c677404f12c648"},"schema_version":"1.0","source":{"id":"1804.08277","kind":"arxiv","version":1}},"canonical_sha256":"5f95af135baf5654ebb9f554790505e3885f48591ed8bdfa174f77449d4d579b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5f95af135baf5654ebb9f554790505e3885f48591ed8bdfa174f77449d4d579b","first_computed_at":"2026-05-18T00:02:35.138372Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:02:35.138372Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CXuSR8pj3sCd6MBzpiFPvgI86JnfXeN14Kbjnsp/azF2pvVzT8m6dDsb+8He68u+c/qj0SYhiBj86O7+VHDKCA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:02:35.139012Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.08277","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:26847cada1a9050929589f0e3b83d12e67be8e642d0c3ad08919f11a0dcecee9","sha256:c16718f0ea6aba4a5c6cbf2476a1a2e51d8fc0569da82dd4c0024342d0325f33"],"state_sha256":"34d7647ce99df5a447a8d142f8eb0343664e3dcc5f25227852953aaa16d2f77b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M6KGxFwvNlt1gdmOmYP44MjgDnBFR+dX4IRXBXuCeaYEYGYLrjcc2n45s+oi0gao57/OirXFz2rmy9UnsYjDCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T02:20:34.473546Z","bundle_sha256":"bd8062abe0e46cef206c9bbacd0e05ca1858b1b0acbd9d6ef8b24868300fa6c7"}}