{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:UNAZT6WDX464GZAUOQIXNJVQ75","short_pith_number":"pith:UNAZT6WD","canonical_record":{"source":{"id":"0904.4211","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-04-27T16:38:44Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"77846743894641a276db5563cedf17f0aca1ff6da1b7ec543122cab1a7da314f","abstract_canon_sha256":"d222ca668e616876d14a01063572fa2fca3dfdd8c3e5b5a3022c1bfb92c128a2"},"schema_version":"1.0"},"canonical_sha256":"a34199fac3bf3dc36414741176a6b0ff74def95a9dc554d7bce009e1bda08864","source":{"kind":"arxiv","id":"0904.4211","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0904.4211","created_at":"2026-05-18T02:13:57Z"},{"alias_kind":"arxiv_version","alias_value":"0904.4211v1","created_at":"2026-05-18T02:13:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0904.4211","created_at":"2026-05-18T02:13:57Z"},{"alias_kind":"pith_short_12","alias_value":"UNAZT6WDX464","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"UNAZT6WDX464GZAU","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"UNAZT6WD","created_at":"2026-05-18T12:26:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:UNAZT6WDX464GZAUOQIXNJVQ75","target":"record","payload":{"canonical_record":{"source":{"id":"0904.4211","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-04-27T16:38:44Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"77846743894641a276db5563cedf17f0aca1ff6da1b7ec543122cab1a7da314f","abstract_canon_sha256":"d222ca668e616876d14a01063572fa2fca3dfdd8c3e5b5a3022c1bfb92c128a2"},"schema_version":"1.0"},"canonical_sha256":"a34199fac3bf3dc36414741176a6b0ff74def95a9dc554d7bce009e1bda08864","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:13:57.003251Z","signature_b64":"AYhRPiihwtVMFvX5N8CeGgXpzxMNXqNXF28JYbog6xrJgE83sRwqBluxaNwp0uPJNzcb6W4eKjmZioC5agMoAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a34199fac3bf3dc36414741176a6b0ff74def95a9dc554d7bce009e1bda08864","last_reissued_at":"2026-05-18T02:13:57.002563Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:13:57.002563Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0904.4211","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":"2026-05-18T02:13:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2a6vLum7uCqKKeqZG76cZ9KmT6bV0Pi1T19FzKBWK8BPqmDNmmDx5b5/Yil5q+yqpgR2rLEQ+etxXlFhLeoUDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T21:21:45.570975Z"},"content_sha256":"ec671a3feeb7aa77f7b984603579ff629af0a06deaaab492292cb6262b554c34","schema_version":"1.0","event_id":"sha256:ec671a3feeb7aa77f7b984603579ff629af0a06deaaab492292cb6262b554c34"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:UNAZT6WDX464GZAUOQIXNJVQ75","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"RAT J1953+1859: a dwarf nova discovered through high amplitude QPOs in quiescence","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.HE","authors_text":"((1) Armagh Observatory, (2) Tuorla Observatory, 3), (3) MSSL/Ucl, (4) Univ Warwick, (5) Univ Herts, (6) Radboud Univ Nijmegen, (7) SAAO, (8) Queens Univ Belfast), Gavin Ramsay (1), George Marshall (4), Gijs Nelemans (6), Harry Lehto (2), Ian Todd (8), Pasi Hakala (2), Peter Wheatley (4), Ralf Napiwotzki (5), Stephen Potter (7), Thomas Barclay (1","submitted_at":"2009-04-27T16:38:44Z","abstract_excerpt":"We report the discovery of an accreting binary, RAT J1953+1859, made during the RApid Temporal Survey (RATS) on the Isaac Newton Telescope. It showed high amplitude (0.3 mag) quasi-periodic oscillations on a timescale of ~20 mins. Further observations made using the Nordic Optical Telescope showed it to be ~4 mag brighter than in the discovery images. These photometric observations, together with radial velocity data taken using the William Herschel Telescope, point to an orbital period of ~90 mins. These data suggest that RAT J1953+1859 is a dwarf novae of the SU UMa type. What makes RAT J195"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0904.4211","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":"2026-05-18T02:13:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6lKB/hA4VRkUEX4wT79cChTtJqgXHurKQX8g8f6kxinBsSyXeL8wwmiQ2vzyFM0pLeyqzTssPzovG1MUpz27Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T21:21:45.571588Z"},"content_sha256":"c4fc734025fed8203aa645982f1b7c7927c7407b60ef8b668731e97d09018cdd","schema_version":"1.0","event_id":"sha256:c4fc734025fed8203aa645982f1b7c7927c7407b60ef8b668731e97d09018cdd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UNAZT6WDX464GZAUOQIXNJVQ75/bundle.json","state_url":"https://pith.science/pith/UNAZT6WDX464GZAUOQIXNJVQ75/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UNAZT6WDX464GZAUOQIXNJVQ75/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":"2026-05-30T21:21:45Z","links":{"resolver":"https://pith.science/pith/UNAZT6WDX464GZAUOQIXNJVQ75","bundle":"https://pith.science/pith/UNAZT6WDX464GZAUOQIXNJVQ75/bundle.json","state":"https://pith.science/pith/UNAZT6WDX464GZAUOQIXNJVQ75/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UNAZT6WDX464GZAUOQIXNJVQ75/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:UNAZT6WDX464GZAUOQIXNJVQ75","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":"d222ca668e616876d14a01063572fa2fca3dfdd8c3e5b5a3022c1bfb92c128a2","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-04-27T16:38:44Z","title_canon_sha256":"77846743894641a276db5563cedf17f0aca1ff6da1b7ec543122cab1a7da314f"},"schema_version":"1.0","source":{"id":"0904.4211","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0904.4211","created_at":"2026-05-18T02:13:57Z"},{"alias_kind":"arxiv_version","alias_value":"0904.4211v1","created_at":"2026-05-18T02:13:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0904.4211","created_at":"2026-05-18T02:13:57Z"},{"alias_kind":"pith_short_12","alias_value":"UNAZT6WDX464","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"UNAZT6WDX464GZAU","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"UNAZT6WD","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:c4fc734025fed8203aa645982f1b7c7927c7407b60ef8b668731e97d09018cdd","target":"graph","created_at":"2026-05-18T02:13:57Z","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 report the discovery of an accreting binary, RAT J1953+1859, made during the RApid Temporal Survey (RATS) on the Isaac Newton Telescope. It showed high amplitude (0.3 mag) quasi-periodic oscillations on a timescale of ~20 mins. Further observations made using the Nordic Optical Telescope showed it to be ~4 mag brighter than in the discovery images. These photometric observations, together with radial velocity data taken using the William Herschel Telescope, point to an orbital period of ~90 mins. These data suggest that RAT J1953+1859 is a dwarf novae of the SU UMa type. What makes RAT J195","authors_text":"((1) Armagh Observatory, (2) Tuorla Observatory, 3), (3) MSSL/Ucl, (4) Univ Warwick, (5) Univ Herts, (6) Radboud Univ Nijmegen, (7) SAAO, (8) Queens Univ Belfast), Gavin Ramsay (1), George Marshall (4), Gijs Nelemans (6), Harry Lehto (2), Ian Todd (8), Pasi Hakala (2), Peter Wheatley (4), Ralf Napiwotzki (5), Stephen Potter (7), Thomas Barclay (1","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-04-27T16:38:44Z","title":"RAT J1953+1859: a dwarf nova discovered through high amplitude QPOs in quiescence"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0904.4211","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:ec671a3feeb7aa77f7b984603579ff629af0a06deaaab492292cb6262b554c34","target":"record","created_at":"2026-05-18T02:13:57Z","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":"d222ca668e616876d14a01063572fa2fca3dfdd8c3e5b5a3022c1bfb92c128a2","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-04-27T16:38:44Z","title_canon_sha256":"77846743894641a276db5563cedf17f0aca1ff6da1b7ec543122cab1a7da314f"},"schema_version":"1.0","source":{"id":"0904.4211","kind":"arxiv","version":1}},"canonical_sha256":"a34199fac3bf3dc36414741176a6b0ff74def95a9dc554d7bce009e1bda08864","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a34199fac3bf3dc36414741176a6b0ff74def95a9dc554d7bce009e1bda08864","first_computed_at":"2026-05-18T02:13:57.002563Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:13:57.002563Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AYhRPiihwtVMFvX5N8CeGgXpzxMNXqNXF28JYbog6xrJgE83sRwqBluxaNwp0uPJNzcb6W4eKjmZioC5agMoAA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:13:57.003251Z","signed_message":"canonical_sha256_bytes"},"source_id":"0904.4211","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ec671a3feeb7aa77f7b984603579ff629af0a06deaaab492292cb6262b554c34","sha256:c4fc734025fed8203aa645982f1b7c7927c7407b60ef8b668731e97d09018cdd"],"state_sha256":"f3bfcd2047cd3120156d0bf5835ca8bb33fa64a98b8caa6be22783736ff4895d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JOhF9LIU2mvJyOmD+Kl10wTqRH3aS7LCORs8hCy9WjY4aqYbAApcGW9Y256aoEeFxB0CfLBXWVDSFr1F19qUDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T21:21:45.574567Z","bundle_sha256":"030794642433525cf22fb6d00fa33479e24491eb2a6a996b4b786bec61a3aa13"}}