{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:J5EZTVRPK5YMOYCBWR7IJMEDTG","short_pith_number":"pith:J5EZTVRP","canonical_record":{"source":{"id":"1502.04004","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-13T14:31:29Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"ecc5bfd45e5ec067c8bdc4e4808cd6a1295b140eb9967c8ac378ec518e8ed0ed","abstract_canon_sha256":"7940fb0e061930b2e7f039e8b45bb74a28bb000deebe682aff1aa138bb54b2a2"},"schema_version":"1.0"},"canonical_sha256":"4f4999d62f5770c76041b47e84b0839986c3731ca85dd77d36fa81a92a478b99","source":{"kind":"arxiv","id":"1502.04004","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.04004","created_at":"2026-05-18T01:37:49Z"},{"alias_kind":"arxiv_version","alias_value":"1502.04004v3","created_at":"2026-05-18T01:37:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.04004","created_at":"2026-05-18T01:37:49Z"},{"alias_kind":"pith_short_12","alias_value":"J5EZTVRPK5YM","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"J5EZTVRPK5YMOYCB","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"J5EZTVRP","created_at":"2026-05-18T12:29:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:J5EZTVRPK5YMOYCBWR7IJMEDTG","target":"record","payload":{"canonical_record":{"source":{"id":"1502.04004","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-13T14:31:29Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"ecc5bfd45e5ec067c8bdc4e4808cd6a1295b140eb9967c8ac378ec518e8ed0ed","abstract_canon_sha256":"7940fb0e061930b2e7f039e8b45bb74a28bb000deebe682aff1aa138bb54b2a2"},"schema_version":"1.0"},"canonical_sha256":"4f4999d62f5770c76041b47e84b0839986c3731ca85dd77d36fa81a92a478b99","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:37:49.082420Z","signature_b64":"p2ylOuWB3xqQb3XxdBWzS9xTPz5/a0oACRdewi4tTywZdjauq/2n2d5XVnGJN59aGZC6xqP/+VlHbXVBBHZDCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4f4999d62f5770c76041b47e84b0839986c3731ca85dd77d36fa81a92a478b99","last_reissued_at":"2026-05-18T01:37:49.081867Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:37:49.081867Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1502.04004","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:37:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M15GrHXzAa9ktVwyz7ydqy5VO9A9B1C8wjEa+ArkQDZb14wt6cnxpurCtn1IIdspxftUj2f3fMcNyQX+xeswAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T07:03:01.651740Z"},"content_sha256":"a087c7370cf886d29d98982c55b2f58508c0d16dcc3c6b172d96cef320112bb1","schema_version":"1.0","event_id":"sha256:a087c7370cf886d29d98982c55b2f58508c0d16dcc3c6b172d96cef320112bb1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:J5EZTVRPK5YMOYCBWR7IJMEDTG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"K2 Variable Catalogue: Variable Stars and Eclipsing Binaries in K2 Campaigns 1 and 0","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.SR","authors_text":"D. J. A. Brown, D. J. Armstrong, D. L. Pollacco, H. P. Osborn, J. Kirk, J. McCormac, J. Spake, K. W. F. Lam, S. R. Walker","submitted_at":"2015-02-13T14:31:29Z","abstract_excerpt":"We have created a catalogue of variable stars found from a search of the publicly available K2 mission data from Campaigns 1 and 0. This catalogue provides the identifiers of 8395 variable stars, including 199 candidate eclipsing binaries with periods up to 60d and 3871 periodic or quasi-periodic objects, with periods up to 20d for Campaign 1 and 15d for Campaign 0. Lightcurves are extracted and detrended from the available data. These are searched using a combination of algorithmic and human classification, leading to a classifier for each object as an eclipsing binary, sinusoidal periodic, q"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.04004","kind":"arxiv","version":3},"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":"2026-05-18T01:37:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eLJIpQrfLY2+DsEWVWBpWpQRxs6SRr6+lCasiARyD1g2+vyX66s+uZu5xavzLMcELIyeXW51vtSTot7QTmbHDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T07:03:01.652274Z"},"content_sha256":"ded8fe8fa5d656381460fe932779fd189a9f5bddf32d25aacc043b0150d73150","schema_version":"1.0","event_id":"sha256:ded8fe8fa5d656381460fe932779fd189a9f5bddf32d25aacc043b0150d73150"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/J5EZTVRPK5YMOYCBWR7IJMEDTG/bundle.json","state_url":"https://pith.science/pith/J5EZTVRPK5YMOYCBWR7IJMEDTG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/J5EZTVRPK5YMOYCBWR7IJMEDTG/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":"2026-05-31T07:03:01Z","links":{"resolver":"https://pith.science/pith/J5EZTVRPK5YMOYCBWR7IJMEDTG","bundle":"https://pith.science/pith/J5EZTVRPK5YMOYCBWR7IJMEDTG/bundle.json","state":"https://pith.science/pith/J5EZTVRPK5YMOYCBWR7IJMEDTG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/J5EZTVRPK5YMOYCBWR7IJMEDTG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:J5EZTVRPK5YMOYCBWR7IJMEDTG","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":"7940fb0e061930b2e7f039e8b45bb74a28bb000deebe682aff1aa138bb54b2a2","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-13T14:31:29Z","title_canon_sha256":"ecc5bfd45e5ec067c8bdc4e4808cd6a1295b140eb9967c8ac378ec518e8ed0ed"},"schema_version":"1.0","source":{"id":"1502.04004","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.04004","created_at":"2026-05-18T01:37:49Z"},{"alias_kind":"arxiv_version","alias_value":"1502.04004v3","created_at":"2026-05-18T01:37:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.04004","created_at":"2026-05-18T01:37:49Z"},{"alias_kind":"pith_short_12","alias_value":"J5EZTVRPK5YM","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"J5EZTVRPK5YMOYCB","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"J5EZTVRP","created_at":"2026-05-18T12:29:27Z"}],"graph_snapshots":[{"event_id":"sha256:ded8fe8fa5d656381460fe932779fd189a9f5bddf32d25aacc043b0150d73150","target":"graph","created_at":"2026-05-18T01:37:49Z","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 have created a catalogue of variable stars found from a search of the publicly available K2 mission data from Campaigns 1 and 0. This catalogue provides the identifiers of 8395 variable stars, including 199 candidate eclipsing binaries with periods up to 60d and 3871 periodic or quasi-periodic objects, with periods up to 20d for Campaign 1 and 15d for Campaign 0. Lightcurves are extracted and detrended from the available data. These are searched using a combination of algorithmic and human classification, leading to a classifier for each object as an eclipsing binary, sinusoidal periodic, q","authors_text":"D. J. A. Brown, D. J. Armstrong, D. L. Pollacco, H. P. Osborn, J. Kirk, J. McCormac, J. Spake, K. W. F. Lam, S. R. Walker","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-13T14:31:29Z","title":"K2 Variable Catalogue: Variable Stars and Eclipsing Binaries in K2 Campaigns 1 and 0"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.04004","kind":"arxiv","version":3},"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:a087c7370cf886d29d98982c55b2f58508c0d16dcc3c6b172d96cef320112bb1","target":"record","created_at":"2026-05-18T01:37:49Z","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":"7940fb0e061930b2e7f039e8b45bb74a28bb000deebe682aff1aa138bb54b2a2","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-13T14:31:29Z","title_canon_sha256":"ecc5bfd45e5ec067c8bdc4e4808cd6a1295b140eb9967c8ac378ec518e8ed0ed"},"schema_version":"1.0","source":{"id":"1502.04004","kind":"arxiv","version":3}},"canonical_sha256":"4f4999d62f5770c76041b47e84b0839986c3731ca85dd77d36fa81a92a478b99","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4f4999d62f5770c76041b47e84b0839986c3731ca85dd77d36fa81a92a478b99","first_computed_at":"2026-05-18T01:37:49.081867Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:37:49.081867Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"p2ylOuWB3xqQb3XxdBWzS9xTPz5/a0oACRdewi4tTywZdjauq/2n2d5XVnGJN59aGZC6xqP/+VlHbXVBBHZDCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:37:49.082420Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.04004","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a087c7370cf886d29d98982c55b2f58508c0d16dcc3c6b172d96cef320112bb1","sha256:ded8fe8fa5d656381460fe932779fd189a9f5bddf32d25aacc043b0150d73150"],"state_sha256":"84a3cdd5ab97cdca234b6fdffc65112bcc812ba988bdde77c258b5ec4ea84bac"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y8k2++DJzMrr4P71KadHfKLFyb25yqB6KRWzDu22lr9rp3N7ImtMhT+7XSZlmooo53HP+t/u5qCc8PM+SGaRCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T07:03:01.656142Z","bundle_sha256":"3f0da02ab00244d413881d9aaa8239b10af6107c6974b6eb09fea54f0e36977f"}}