{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:V5BMZOJUSUQ3XIOXIW3REB752Q","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":"159705b087acd9dfcd1f777bcd73038e75dda15e4e44c0c49396ddcba0a91bf8","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-05-29T10:35:58Z","title_canon_sha256":"4debcfa3d1fc8cdbca90c1775c4e6f2e2f678d711d92be7fbbc35ea190673f09"},"schema_version":"1.0","source":{"id":"2505.23328","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.23328","created_at":"2026-07-05T11:12:34Z"},{"alias_kind":"arxiv_version","alias_value":"2505.23328v2","created_at":"2026-07-05T11:12:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.23328","created_at":"2026-07-05T11:12:34Z"},{"alias_kind":"pith_short_12","alias_value":"V5BMZOJUSUQ3","created_at":"2026-07-05T11:12:34Z"},{"alias_kind":"pith_short_16","alias_value":"V5BMZOJUSUQ3XIOX","created_at":"2026-07-05T11:12:34Z"},{"alias_kind":"pith_short_8","alias_value":"V5BMZOJU","created_at":"2026-07-05T11:12:34Z"}],"graph_snapshots":[{"event_id":"sha256:fa3ab7923ba3007594ed39fdcf52fe7996707157ba2ae9aa1f561db0d1699781","target":"graph","created_at":"2026-07-05T11:12:34Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2505.23328/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Intensive reverberation mapping monitoring programs combine ground-based photometric observations from different telescopes, requiring intercalibration of lightcurves to reduce systematic instrumental differences. We present a new iterative algorithm to calibrate photometric time-series data of active galactic nuclei (AGN) using 100s of comparison stars on the same images, building upon the established method of ensemble photometry. The algorithm determines telescope-specific and epoch-specific correction parameters, and simultaneously computes a multi-component noise model to account for unde","authors_text":"Hannah Cornfield, Juan V. Hern\\'andez Santisteban, Keith Horne, Roberta Vieliute","cross_cats":["astro-ph.GA"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-05-29T10:35:58Z","title":"PyTICS: An Iterative Method for Photometric Lightcurve Intercalibration using Comparison Stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.23328","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:ef6fc03b96fe524bb288841c7996918e2c58d19c761fe2585a7f059f28245d22","target":"record","created_at":"2026-07-05T11:12:34Z","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":"159705b087acd9dfcd1f777bcd73038e75dda15e4e44c0c49396ddcba0a91bf8","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-05-29T10:35:58Z","title_canon_sha256":"4debcfa3d1fc8cdbca90c1775c4e6f2e2f678d711d92be7fbbc35ea190673f09"},"schema_version":"1.0","source":{"id":"2505.23328","kind":"arxiv","version":2}},"canonical_sha256":"af42ccb9349521bba1d745b71207fdd43dc986b875dd71f0a0c7ec8326ae63f9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"af42ccb9349521bba1d745b71207fdd43dc986b875dd71f0a0c7ec8326ae63f9","first_computed_at":"2026-07-05T11:12:34.721473Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:12:34.721473Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+r7jAeoeGYkAGhQrGtiwrCNHnJjQPhe0waTojKhgAAyZIAQEf4ckreMdLX6wZ0MrJP5+b2FDJ2fskXPj04bkDg==","signature_status":"signed_v1","signed_at":"2026-07-05T11:12:34.721977Z","signed_message":"canonical_sha256_bytes"},"source_id":"2505.23328","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ef6fc03b96fe524bb288841c7996918e2c58d19c761fe2585a7f059f28245d22","sha256:fa3ab7923ba3007594ed39fdcf52fe7996707157ba2ae9aa1f561db0d1699781"],"state_sha256":"167f0d4e1ce4c1381e13688ebe9e3b9a315d82565d64aea7ea4ca13ad77a5d38"}