{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:26WWHL5VUSORKHWJ3QC5JPQ3ME","short_pith_number":"pith:26WWHL5V","schema_version":"1.0","canonical_sha256":"d7ad63afb5a49d151ec9dc05d4be1b6135c19b8757bb127559824d512a43703e","source":{"kind":"arxiv","id":"1601.07314","version":4},"attestation_state":"computed","paper":{"title":"A statistical analysis of the accuracy of the digitized magnitudes of photometric plates on the time scale of decades with an application to the century-long light curve of KIC 8462852","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"Daniel Angerhausen, Joshua Pepper, Keivan G. Stassun, Michael B. Lund, Michael Hippke","submitted_at":"2016-01-27T10:22:31Z","abstract_excerpt":"We present a statistical analysis of the accuracy of the digitized magnitudes of photometric plates on the time scale of decades. In our examination of archival Johnson B photometry from the Harvard DASCH archive, we find a median RMS scatter of lightcurves of order 0.15mag over the range B~9-17 for all calibrations. Slight underlying systematics (trends or flux discontinuities) are on a level of ~<=0.2mag per century (1889-1990) for the majority of constant stars. These historic data can be unambiguously used for processes that happen on scales of magnitudes, and need to be carefully examined"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1601.07314","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-01-27T10:22:31Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"2dc7ff39a7cf4d1d447fc4f52acbc4dfe9a8b1c685957244916f6289d8c4e71d","abstract_canon_sha256":"bf79814a219e2dc31ddcce772de501da84cfc51b6f878b2c620e9a8712bf590c"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:11:31.672745Z","signature_b64":"YZHA7grL1Pfufc4xaFiYmC7AaPeGTfEYMLTog4p5hVdJ+ky3v/k/+cBR6c4JXr6CofMnMaxN6SsL5tGJtucgDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d7ad63afb5a49d151ec9dc05d4be1b6135c19b8757bb127559824d512a43703e","last_reissued_at":"2026-05-18T01:11:31.672333Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:11:31.672333Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A statistical analysis of the accuracy of the digitized magnitudes of photometric plates on the time scale of decades with an application to the century-long light curve of KIC 8462852","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"Daniel Angerhausen, Joshua Pepper, Keivan G. Stassun, Michael B. Lund, Michael Hippke","submitted_at":"2016-01-27T10:22:31Z","abstract_excerpt":"We present a statistical analysis of the accuracy of the digitized magnitudes of photometric plates on the time scale of decades. In our examination of archival Johnson B photometry from the Harvard DASCH archive, we find a median RMS scatter of lightcurves of order 0.15mag over the range B~9-17 for all calibrations. Slight underlying systematics (trends or flux discontinuities) are on a level of ~<=0.2mag per century (1889-1990) for the majority of constant stars. These historic data can be unambiguously used for processes that happen on scales of magnitudes, and need to be carefully examined"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.07314","kind":"arxiv","version":4},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1601.07314","created_at":"2026-05-18T01:11:31.672411+00:00"},{"alias_kind":"arxiv_version","alias_value":"1601.07314v4","created_at":"2026-05-18T01:11:31.672411+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.07314","created_at":"2026-05-18T01:11:31.672411+00:00"},{"alias_kind":"pith_short_12","alias_value":"26WWHL5VUSOR","created_at":"2026-05-18T12:29:52.810259+00:00"},{"alias_kind":"pith_short_16","alias_value":"26WWHL5VUSORKHWJ","created_at":"2026-05-18T12:29:52.810259+00:00"},{"alias_kind":"pith_short_8","alias_value":"26WWHL5V","created_at":"2026-05-18T12:29:52.810259+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/26WWHL5VUSORKHWJ3QC5JPQ3ME","json":"https://pith.science/pith/26WWHL5VUSORKHWJ3QC5JPQ3ME.json","graph_json":"https://pith.science/api/pith-number/26WWHL5VUSORKHWJ3QC5JPQ3ME/graph.json","events_json":"https://pith.science/api/pith-number/26WWHL5VUSORKHWJ3QC5JPQ3ME/events.json","paper":"https://pith.science/paper/26WWHL5V"},"agent_actions":{"view_html":"https://pith.science/pith/26WWHL5VUSORKHWJ3QC5JPQ3ME","download_json":"https://pith.science/pith/26WWHL5VUSORKHWJ3QC5JPQ3ME.json","view_paper":"https://pith.science/paper/26WWHL5V","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1601.07314&json=true","fetch_graph":"https://pith.science/api/pith-number/26WWHL5VUSORKHWJ3QC5JPQ3ME/graph.json","fetch_events":"https://pith.science/api/pith-number/26WWHL5VUSORKHWJ3QC5JPQ3ME/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/26WWHL5VUSORKHWJ3QC5JPQ3ME/action/timestamp_anchor","attest_storage":"https://pith.science/pith/26WWHL5VUSORKHWJ3QC5JPQ3ME/action/storage_attestation","attest_author":"https://pith.science/pith/26WWHL5VUSORKHWJ3QC5JPQ3ME/action/author_attestation","sign_citation":"https://pith.science/pith/26WWHL5VUSORKHWJ3QC5JPQ3ME/action/citation_signature","submit_replication":"https://pith.science/pith/26WWHL5VUSORKHWJ3QC5JPQ3ME/action/replication_record"}},"created_at":"2026-05-18T01:11:31.672411+00:00","updated_at":"2026-05-18T01:11:31.672411+00:00"}