{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:TEZSR3MMDEFSITLWWWDTRANECV","short_pith_number":"pith:TEZSR3MM","canonical_record":{"source":{"id":"1505.04495","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-05-18T03:13:00Z","cross_cats_sorted":[],"title_canon_sha256":"0eb5c9a0d88a3ebbde422bc81f90e7dd9d6e560b44e97afb4627d92ec076a763","abstract_canon_sha256":"b60dd26d5a288a11c9fd82adc833c806d2c3f6b07be80fb28e2e9a35dfdd27b7"},"schema_version":"1.0"},"canonical_sha256":"993328ed8c190b244d76b5873881a41561546d0b2aba56742e66d08bf22bb355","source":{"kind":"arxiv","id":"1505.04495","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.04495","created_at":"2026-05-18T02:07:25Z"},{"alias_kind":"arxiv_version","alias_value":"1505.04495v1","created_at":"2026-05-18T02:07:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.04495","created_at":"2026-05-18T02:07:25Z"},{"alias_kind":"pith_short_12","alias_value":"TEZSR3MMDEFS","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"TEZSR3MMDEFSITLW","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"TEZSR3MM","created_at":"2026-05-18T12:29:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:TEZSR3MMDEFSITLWWWDTRANECV","target":"record","payload":{"canonical_record":{"source":{"id":"1505.04495","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-05-18T03:13:00Z","cross_cats_sorted":[],"title_canon_sha256":"0eb5c9a0d88a3ebbde422bc81f90e7dd9d6e560b44e97afb4627d92ec076a763","abstract_canon_sha256":"b60dd26d5a288a11c9fd82adc833c806d2c3f6b07be80fb28e2e9a35dfdd27b7"},"schema_version":"1.0"},"canonical_sha256":"993328ed8c190b244d76b5873881a41561546d0b2aba56742e66d08bf22bb355","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:07:25.300401Z","signature_b64":"XVZUZyyCvQjQTQ251uaXuu+fiMKYCH5bAr62ycFy7TlFxaPtPFlXIgILzt3aV/u6Sh+75dLBbIkVQy6Gs8WxDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"993328ed8c190b244d76b5873881a41561546d0b2aba56742e66d08bf22bb355","last_reissued_at":"2026-05-18T02:07:25.300040Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:07:25.300040Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1505.04495","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":"2026-05-18T02:07:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aNQ8dnUPWI9HD6FVBBrhS1C3o2Xw+ZDfYyrUf+rvuspRq3jwH8PtdhAKEGg4YIEJARKRipzsRToHqQKYT/5ABg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T04:18:50.531957Z"},"content_sha256":"aa8096a9a5b4a104ccc6ad11380a149adcd42b75da0b03fe5c3f5d0af512284d","schema_version":"1.0","event_id":"sha256:aa8096a9a5b4a104ccc6ad11380a149adcd42b75da0b03fe5c3f5d0af512284d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:TEZSR3MMDEFSITLWWWDTRANECV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A New Catalog of Variable Stars in the Field of the Open Cluster M37","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"J. D. Hartman, S.-W. Chang, Y.-I. Byun","submitted_at":"2015-05-18T03:13:00Z","abstract_excerpt":"We present a comprehensive re-analysis of stellar photometric variability in the field of the open cluster M37 following the application of a new photometry and de-trending method to MMT/Megacam image archive. This new analysis allows a rare opportunity to explore photometric variability over a broad range of time-scales, from minutes to a month. The intent of this work is to examine the entire sample of over 30,000 objects for periodic, aperiodic, and sporadic behaviors in their light curves. We show a modified version of the fast $\\chi^{2}$ periodogram algorithm (F$\\chi^{2}$) and change-poin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.04495","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":"2026-05-18T02:07:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tCJHDMcF3csmYFcVTt6KiFtTGmIqOU8+Jes9XFh9QphPatizciRw/oHkftpnHSTYg0V09v7pmGKYsqJTsUNTDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T04:18:50.532593Z"},"content_sha256":"8dcd8f984903ec559403983f6979e3842d5ec885333530e499603ef6203533d0","schema_version":"1.0","event_id":"sha256:8dcd8f984903ec559403983f6979e3842d5ec885333530e499603ef6203533d0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TEZSR3MMDEFSITLWWWDTRANECV/bundle.json","state_url":"https://pith.science/pith/TEZSR3MMDEFSITLWWWDTRANECV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TEZSR3MMDEFSITLWWWDTRANECV/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":"2026-05-31T04:18:50Z","links":{"resolver":"https://pith.science/pith/TEZSR3MMDEFSITLWWWDTRANECV","bundle":"https://pith.science/pith/TEZSR3MMDEFSITLWWWDTRANECV/bundle.json","state":"https://pith.science/pith/TEZSR3MMDEFSITLWWWDTRANECV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TEZSR3MMDEFSITLWWWDTRANECV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:TEZSR3MMDEFSITLWWWDTRANECV","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":"b60dd26d5a288a11c9fd82adc833c806d2c3f6b07be80fb28e2e9a35dfdd27b7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-05-18T03:13:00Z","title_canon_sha256":"0eb5c9a0d88a3ebbde422bc81f90e7dd9d6e560b44e97afb4627d92ec076a763"},"schema_version":"1.0","source":{"id":"1505.04495","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.04495","created_at":"2026-05-18T02:07:25Z"},{"alias_kind":"arxiv_version","alias_value":"1505.04495v1","created_at":"2026-05-18T02:07:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.04495","created_at":"2026-05-18T02:07:25Z"},{"alias_kind":"pith_short_12","alias_value":"TEZSR3MMDEFS","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"TEZSR3MMDEFSITLW","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"TEZSR3MM","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:8dcd8f984903ec559403983f6979e3842d5ec885333530e499603ef6203533d0","target":"graph","created_at":"2026-05-18T02:07:25Z","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 present a comprehensive re-analysis of stellar photometric variability in the field of the open cluster M37 following the application of a new photometry and de-trending method to MMT/Megacam image archive. This new analysis allows a rare opportunity to explore photometric variability over a broad range of time-scales, from minutes to a month. The intent of this work is to examine the entire sample of over 30,000 objects for periodic, aperiodic, and sporadic behaviors in their light curves. We show a modified version of the fast $\\chi^{2}$ periodogram algorithm (F$\\chi^{2}$) and change-poin","authors_text":"J. D. Hartman, S.-W. Chang, Y.-I. Byun","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-05-18T03:13:00Z","title":"A New Catalog of Variable Stars in the Field of the Open Cluster M37"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.04495","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:aa8096a9a5b4a104ccc6ad11380a149adcd42b75da0b03fe5c3f5d0af512284d","target":"record","created_at":"2026-05-18T02:07:25Z","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":"b60dd26d5a288a11c9fd82adc833c806d2c3f6b07be80fb28e2e9a35dfdd27b7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-05-18T03:13:00Z","title_canon_sha256":"0eb5c9a0d88a3ebbde422bc81f90e7dd9d6e560b44e97afb4627d92ec076a763"},"schema_version":"1.0","source":{"id":"1505.04495","kind":"arxiv","version":1}},"canonical_sha256":"993328ed8c190b244d76b5873881a41561546d0b2aba56742e66d08bf22bb355","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"993328ed8c190b244d76b5873881a41561546d0b2aba56742e66d08bf22bb355","first_computed_at":"2026-05-18T02:07:25.300040Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:07:25.300040Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XVZUZyyCvQjQTQ251uaXuu+fiMKYCH5bAr62ycFy7TlFxaPtPFlXIgILzt3aV/u6Sh+75dLBbIkVQy6Gs8WxDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:07:25.300401Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.04495","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:aa8096a9a5b4a104ccc6ad11380a149adcd42b75da0b03fe5c3f5d0af512284d","sha256:8dcd8f984903ec559403983f6979e3842d5ec885333530e499603ef6203533d0"],"state_sha256":"909e45abd002f21c7b1a15c803d6c1dc9040257cc1c4821e0bee6555f336ada9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DFJiGRgtaw2cCWh39jpjI8bd+m97PxNjHzmwRk1l5m9GYu40uCpuPvkuD5E8cztBjrSSnpMxNr7UMNKHEUtYAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T04:18:50.535923Z","bundle_sha256":"eb4615a5e2b055eefa82812ff51a1962a99fb809927c83d6cc0f3d09f6a4fb2c"}}