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For RCW 103, we found no convincing evidence neither for 6 hrs IR modulation nor for variability on any time scale from the proposed counterpart, as well as for the other candidates close to the revised Chandr"},"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":"0711.0113","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-11-01T16:04:18Z","cross_cats_sorted":[],"title_canon_sha256":"3eec92e63e429730fbb7014775ea9378ad08149bd331bb7d33efb3efd85c49a8","abstract_canon_sha256":"b1edc07db5d4681a1039e366cefdb0475f473dba42276b7d6cb8b3e48311b41d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:44:34.505270Z","signature_b64":"p04KhngdOxbccZ8cxhcbv5YCgWERUIZxG/mwpw1AlxRcVoqT3APl3clWq/mk3Kx+7pe/Z4ViHgzhzTjYmhQxBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f7a3bfd61fc6c0521245db35c2688bf7df040766e38210e73bef7c053d3ba56a","last_reissued_at":"2026-07-04T15:44:34.504752Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:44:34.504752Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"VLT observations of Compact Central Objects","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. 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