{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:DI2FJDK4Z7PXSEHI7VV6GB4GIG","short_pith_number":"pith:DI2FJDK4","canonical_record":{"source":{"id":"1304.5023","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-04-18T05:38:54Z","cross_cats_sorted":[],"title_canon_sha256":"2cb46b0e651582a8140797ff9acb7b90183bf5718e4e4418cbf7d06feb9f76a4","abstract_canon_sha256":"158f2b4b9bd5e494fdc04f3a5fbfacaed55357e5dcec9c947613ac3e6b90ca7f"},"schema_version":"1.0"},"canonical_sha256":"1a34548d5ccfdf7910e8fd6be3078641bf560e24397838b1c52c6287bf1197f2","source":{"kind":"arxiv","id":"1304.5023","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.5023","created_at":"2026-05-18T03:27:42Z"},{"alias_kind":"arxiv_version","alias_value":"1304.5023v1","created_at":"2026-05-18T03:27:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.5023","created_at":"2026-05-18T03:27:42Z"},{"alias_kind":"pith_short_12","alias_value":"DI2FJDK4Z7PX","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"DI2FJDK4Z7PXSEHI","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"DI2FJDK4","created_at":"2026-05-18T12:27:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:DI2FJDK4Z7PXSEHI7VV6GB4GIG","target":"record","payload":{"canonical_record":{"source":{"id":"1304.5023","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-04-18T05:38:54Z","cross_cats_sorted":[],"title_canon_sha256":"2cb46b0e651582a8140797ff9acb7b90183bf5718e4e4418cbf7d06feb9f76a4","abstract_canon_sha256":"158f2b4b9bd5e494fdc04f3a5fbfacaed55357e5dcec9c947613ac3e6b90ca7f"},"schema_version":"1.0"},"canonical_sha256":"1a34548d5ccfdf7910e8fd6be3078641bf560e24397838b1c52c6287bf1197f2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:27:42.019092Z","signature_b64":"1LazosU0wY3qP97bp6HZqGyvm/xA46vLOVAyHJdqH4v7/zcsca3Rh5q7hvOFTHV60M6pt5VBBTnTGKHb4UYyAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1a34548d5ccfdf7910e8fd6be3078641bf560e24397838b1c52c6287bf1197f2","last_reissued_at":"2026-05-18T03:27:42.018358Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:27:42.018358Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1304.5023","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":"2026-05-18T03:27:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LzpsSOH/YYj37f5RJYwBvgAc1miT9G0OklK/V9i2r6esqhU562XjfTXIac4S0Z2c+Uhp57ohSEkQUqhWFpenDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T07:36:10.040740Z"},"content_sha256":"d610cebff45cdb0d65d3dec1591339da36f251aa1e27e099ad676bdcb1d4a74e","schema_version":"1.0","event_id":"sha256:d610cebff45cdb0d65d3dec1591339da36f251aa1e27e099ad676bdcb1d4a74e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:DI2FJDK4Z7PXSEHI7VV6GB4GIG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"New variable stars in the field of open cluster NGC188","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A.A. Popov, A.F. Punanova, A.Y. Burdanov, E.A. Avvakumova, I.S. Zalozhnih, V.V. Krushinsky","submitted_at":"2013-04-18T05:38:54Z","abstract_excerpt":"A photometric study of variable stars in the field of old open cluster NGC 188 is discussed. Observations were carried out in two bands R and I for 5513 stars up to R = 17 mag in the field of 1.5 x 1.5 grad. around the cluster. The photometric data were processed by the console application \"Astrokit\", which corrects brightness variations associated with the variability of atmospheric transparency and carries out searching for variable stars. We found 18 new variable stars and determined the parameters of one previously known variable. Among discovered stars one is a low-amplitude pulsating var"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.5023","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":"2026-05-18T03:27:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BcBtz+juAsPQ4zsKDRWO06A869R6ozndTXS+/BdbcRmjAeJQYqeQYByCDYFFsk9X/uuXn9WCRXjlD3QbxR2CCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T07:36:10.041169Z"},"content_sha256":"13afc98021717143356d37b4265e497c188772dcba369597feb3fcfb50786125","schema_version":"1.0","event_id":"sha256:13afc98021717143356d37b4265e497c188772dcba369597feb3fcfb50786125"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DI2FJDK4Z7PXSEHI7VV6GB4GIG/bundle.json","state_url":"https://pith.science/pith/DI2FJDK4Z7PXSEHI7VV6GB4GIG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DI2FJDK4Z7PXSEHI7VV6GB4GIG/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":"2026-06-25T07:36:10Z","links":{"resolver":"https://pith.science/pith/DI2FJDK4Z7PXSEHI7VV6GB4GIG","bundle":"https://pith.science/pith/DI2FJDK4Z7PXSEHI7VV6GB4GIG/bundle.json","state":"https://pith.science/pith/DI2FJDK4Z7PXSEHI7VV6GB4GIG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DI2FJDK4Z7PXSEHI7VV6GB4GIG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:DI2FJDK4Z7PXSEHI7VV6GB4GIG","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":"158f2b4b9bd5e494fdc04f3a5fbfacaed55357e5dcec9c947613ac3e6b90ca7f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-04-18T05:38:54Z","title_canon_sha256":"2cb46b0e651582a8140797ff9acb7b90183bf5718e4e4418cbf7d06feb9f76a4"},"schema_version":"1.0","source":{"id":"1304.5023","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.5023","created_at":"2026-05-18T03:27:42Z"},{"alias_kind":"arxiv_version","alias_value":"1304.5023v1","created_at":"2026-05-18T03:27:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.5023","created_at":"2026-05-18T03:27:42Z"},{"alias_kind":"pith_short_12","alias_value":"DI2FJDK4Z7PX","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"DI2FJDK4Z7PXSEHI","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"DI2FJDK4","created_at":"2026-05-18T12:27:43Z"}],"graph_snapshots":[{"event_id":"sha256:13afc98021717143356d37b4265e497c188772dcba369597feb3fcfb50786125","target":"graph","created_at":"2026-05-18T03:27:42Z","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 photometric study of variable stars in the field of old open cluster NGC 188 is discussed. Observations were carried out in two bands R and I for 5513 stars up to R = 17 mag in the field of 1.5 x 1.5 grad. around the cluster. The photometric data were processed by the console application \"Astrokit\", which corrects brightness variations associated with the variability of atmospheric transparency and carries out searching for variable stars. We found 18 new variable stars and determined the parameters of one previously known variable. Among discovered stars one is a low-amplitude pulsating var","authors_text":"A.A. Popov, A.F. Punanova, A.Y. Burdanov, E.A. Avvakumova, I.S. Zalozhnih, V.V. Krushinsky","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-04-18T05:38:54Z","title":"New variable stars in the field of open cluster NGC188"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.5023","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:d610cebff45cdb0d65d3dec1591339da36f251aa1e27e099ad676bdcb1d4a74e","target":"record","created_at":"2026-05-18T03:27:42Z","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":"158f2b4b9bd5e494fdc04f3a5fbfacaed55357e5dcec9c947613ac3e6b90ca7f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-04-18T05:38:54Z","title_canon_sha256":"2cb46b0e651582a8140797ff9acb7b90183bf5718e4e4418cbf7d06feb9f76a4"},"schema_version":"1.0","source":{"id":"1304.5023","kind":"arxiv","version":1}},"canonical_sha256":"1a34548d5ccfdf7910e8fd6be3078641bf560e24397838b1c52c6287bf1197f2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1a34548d5ccfdf7910e8fd6be3078641bf560e24397838b1c52c6287bf1197f2","first_computed_at":"2026-05-18T03:27:42.018358Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:27:42.018358Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1LazosU0wY3qP97bp6HZqGyvm/xA46vLOVAyHJdqH4v7/zcsca3Rh5q7hvOFTHV60M6pt5VBBTnTGKHb4UYyAA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:27:42.019092Z","signed_message":"canonical_sha256_bytes"},"source_id":"1304.5023","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d610cebff45cdb0d65d3dec1591339da36f251aa1e27e099ad676bdcb1d4a74e","sha256:13afc98021717143356d37b4265e497c188772dcba369597feb3fcfb50786125"],"state_sha256":"5c136e1574ac29db9a47920a0f3b6c3f2e53807cac25fe3e8714a44601693458"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"97y2qdyjwbRxu9QhgTZgkA4qHfKk6StRWyYZaHJQeWKRUWKVsHN9jfdHSTWnpTCv1xIFcUSU1flbTRWrF0cqBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-25T07:36:10.043599Z","bundle_sha256":"3e9130833694d770e7e4028879ef831b4a10dae896a4f3fcc5c579155e8f39c7"}}