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During the time of our observations the brightness of the system varied between 13.2 > B > 11.1 and the colour in the range 0.86 < B-V < 1.33 . We find that RS~Oph becomes more blue, as it becomes brighter, however the hot component becomes more red as it becomes brighter (assuming that the red giant is non-variable). During all the runs RS Oph exhibits flickering with amplitude 0.16 - 0.59 mag in B band. For the flickering source we find th"},"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":"1807.01555","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-07-04T13:10:09Z","cross_cats_sorted":[],"title_canon_sha256":"36a3f353205794ed8883f6b16d1c2c42c454f4ab33d1c22b57f9906a4586321e","abstract_canon_sha256":"c30f78bce4a6751f0e2796dd743861ea712439f04c3ec30e0b311dbec5777518"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:08:38.345157Z","signature_b64":"vSobi3irqsabHLSM34ae24Q23/2y5GVASqItwI766FDQBOdBm2IpnhoHahFOkOyZifslGSLMe4N+1+sBV7xPBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3a5b4a46c058c3551840da59c86d4a13cb5d37530a7a0725728ad30107402dc2","last_reissued_at":"2026-05-18T00:08:38.344533Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:08:38.344533Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The recurrent nova RS Oph - simultaneous B and V band observations of the flickering variability","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"B. Spassov, D. Boneva, G. Y. Latev, J. Marti, K. A. Stoyanov, M. F. Bode, R. K. Zamanov, S. Boeva, S. V. Tsvetkova, Y. Nikolov","submitted_at":"2018-07-04T13:10:09Z","abstract_excerpt":"We performed 48.6 hours (in 28 nights) of simultaneous B and V band observations of the flickering variability of the recurrent nova RS Oph in quiescence. During the time of our observations the brightness of the system varied between 13.2 > B > 11.1 and the colour in the range 0.86 < B-V < 1.33 . We find that RS~Oph becomes more blue, as it becomes brighter, however the hot component becomes more red as it becomes brighter (assuming that the red giant is non-variable). During all the runs RS Oph exhibits flickering with amplitude 0.16 - 0.59 mag in B band. 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