{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:EPRO25GP6NHVAOSNKN6FHNJP4V","short_pith_number":"pith:EPRO25GP","canonical_record":{"source":{"id":"2607.16397","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-07-17T18:00:02Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"313b3dea28bd8d28e02b511853b9a8d191442c85f087d1f741ae8e0091702f39","abstract_canon_sha256":"0b28a154dc0058fb751b82a4f20a4fdc6d9b258fc641a39b5967115118cea217"},"schema_version":"1.0"},"canonical_sha256":"23e2ed74cff34f503a4d537c53b52fe57d00fa87e39c50b63877deb95f2cd84c","source":{"kind":"arxiv","id":"2607.16397","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.16397","created_at":"2026-07-21T00:20:15Z"},{"alias_kind":"arxiv_version","alias_value":"2607.16397v1","created_at":"2026-07-21T00:20:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.16397","created_at":"2026-07-21T00:20:15Z"},{"alias_kind":"pith_short_12","alias_value":"EPRO25GP6NHV","created_at":"2026-07-21T00:20:15Z"},{"alias_kind":"pith_short_16","alias_value":"EPRO25GP6NHVAOSN","created_at":"2026-07-21T00:20:15Z"},{"alias_kind":"pith_short_8","alias_value":"EPRO25GP","created_at":"2026-07-21T00:20:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:EPRO25GP6NHVAOSNKN6FHNJP4V","target":"record","payload":{"canonical_record":{"source":{"id":"2607.16397","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-07-17T18:00:02Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"313b3dea28bd8d28e02b511853b9a8d191442c85f087d1f741ae8e0091702f39","abstract_canon_sha256":"0b28a154dc0058fb751b82a4f20a4fdc6d9b258fc641a39b5967115118cea217"},"schema_version":"1.0"},"canonical_sha256":"23e2ed74cff34f503a4d537c53b52fe57d00fa87e39c50b63877deb95f2cd84c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-21T00:20:15.904654Z","signature_b64":"8PYDCbVsKc7YuV0xofD+K4BT37kJ6bfVLRwqgL4u7+U5bOh+9nZv3Nd8OsbUWGPrv10l7G2s/3QaK7k+5x9XBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"23e2ed74cff34f503a4d537c53b52fe57d00fa87e39c50b63877deb95f2cd84c","last_reissued_at":"2026-07-21T00:20:15.903781Z","signature_status":"signed_v1","first_computed_at":"2026-07-21T00:20:15.903781Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.16397","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":"2026-07-21T00:20:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iCOruF4C5TUQm4n0rvjBumAzMzOJzd0kiIDBQEpf/W+rMNpHeWlrOpmRE4/RMVROP82E1SjqRKDrgk5Z4qXvAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T13:48:59.514545Z"},"content_sha256":"54cc4c17126c185bac00c7a023393d0684bdfb71fbf7414458fde2d35f3aa051","schema_version":"1.0","event_id":"sha256:54cc4c17126c185bac00c7a023393d0684bdfb71fbf7414458fde2d35f3aa051"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:EPRO25GP6NHVAOSNKN6FHNJP4V","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Superorbital variability in the quiescent black hole X-ray transient A0620-00","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"Daniel Mata S\\'anchez, David M. Russell, Enzo A. Saavedra, Federico Garc\\'ia, Fraser Lewis, Gast\\'on J. Escobar, James F. Steiner, Jorge Casares, Manuel A. P. Torres, Montserrat Armas Padilla, Pablo Rodr\\'iguez-Gil, Roi Alonso, Teo Mu\\~noz-Darias","submitted_at":"2026-07-17T18:00:02Z","abstract_excerpt":"Quiescent black hole low-mass X-ray binaries provide a key setting for probing accretion physics at low luminosities. A0620-00, the archetypal system in this class, has remained in X-ray quiescence for decades and exhibits complex optical variability, yet the long-term behaviour of its accretion flow remains poorly understood. Here, we report an analysis of long-term optical monitoring of A0620-00 from ZTF, LCO, and ATLAS. The full dataset spans nearly two decades, with the ZTF light curve providing the primary $\\sim 2760$-day baseline for the period analysis. We identify a superorbital cycle "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.16397","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2607.16397/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-21T00:20:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ETgiAFDqpnN4zp2+Jhv42CTaEAFtGgIquPprtuutMFF13FhslnkM/YpULWB1UEC1xxyrAOTFNbzSMtyB1gASCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T13:48:59.515318Z"},"content_sha256":"eee42a4a669bd6c0000dc42d2c204fdf6fec0ffb2fa9afcd5ad74e6914f2841c","schema_version":"1.0","event_id":"sha256:eee42a4a669bd6c0000dc42d2c204fdf6fec0ffb2fa9afcd5ad74e6914f2841c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EPRO25GP6NHVAOSNKN6FHNJP4V/bundle.json","state_url":"https://pith.science/pith/EPRO25GP6NHVAOSNKN6FHNJP4V/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EPRO25GP6NHVAOSNKN6FHNJP4V/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":"2026-08-12T13:48:59Z","links":{"resolver":"https://pith.science/pith/EPRO25GP6NHVAOSNKN6FHNJP4V","bundle":"https://pith.science/pith/EPRO25GP6NHVAOSNKN6FHNJP4V/bundle.json","state":"https://pith.science/pith/EPRO25GP6NHVAOSNKN6FHNJP4V/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EPRO25GP6NHVAOSNKN6FHNJP4V/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:EPRO25GP6NHVAOSNKN6FHNJP4V","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":"0b28a154dc0058fb751b82a4f20a4fdc6d9b258fc641a39b5967115118cea217","cross_cats_sorted":["astro-ph.SR"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-07-17T18:00:02Z","title_canon_sha256":"313b3dea28bd8d28e02b511853b9a8d191442c85f087d1f741ae8e0091702f39"},"schema_version":"1.0","source":{"id":"2607.16397","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.16397","created_at":"2026-07-21T00:20:15Z"},{"alias_kind":"arxiv_version","alias_value":"2607.16397v1","created_at":"2026-07-21T00:20:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.16397","created_at":"2026-07-21T00:20:15Z"},{"alias_kind":"pith_short_12","alias_value":"EPRO25GP6NHV","created_at":"2026-07-21T00:20:15Z"},{"alias_kind":"pith_short_16","alias_value":"EPRO25GP6NHVAOSN","created_at":"2026-07-21T00:20:15Z"},{"alias_kind":"pith_short_8","alias_value":"EPRO25GP","created_at":"2026-07-21T00:20:15Z"}],"graph_snapshots":[{"event_id":"sha256:eee42a4a669bd6c0000dc42d2c204fdf6fec0ffb2fa9afcd5ad74e6914f2841c","target":"graph","created_at":"2026-07-21T00:20:15Z","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/2607.16397/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Quiescent black hole low-mass X-ray binaries provide a key setting for probing accretion physics at low luminosities. A0620-00, the archetypal system in this class, has remained in X-ray quiescence for decades and exhibits complex optical variability, yet the long-term behaviour of its accretion flow remains poorly understood. Here, we report an analysis of long-term optical monitoring of A0620-00 from ZTF, LCO, and ATLAS. The full dataset spans nearly two decades, with the ZTF light curve providing the primary $\\sim 2760$-day baseline for the period analysis. We identify a superorbital cycle ","authors_text":"Daniel Mata S\\'anchez, David M. Russell, Enzo A. Saavedra, Federico Garc\\'ia, Fraser Lewis, Gast\\'on J. Escobar, James F. Steiner, Jorge Casares, Manuel A. P. Torres, Montserrat Armas Padilla, Pablo Rodr\\'iguez-Gil, Roi Alonso, Teo Mu\\~noz-Darias","cross_cats":["astro-ph.SR"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-07-17T18:00:02Z","title":"Superorbital variability in the quiescent black hole X-ray transient A0620-00"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.16397","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":"sha256:54cc4c17126c185bac00c7a023393d0684bdfb71fbf7414458fde2d35f3aa051","target":"record","created_at":"2026-07-21T00:20:15Z","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":"0b28a154dc0058fb751b82a4f20a4fdc6d9b258fc641a39b5967115118cea217","cross_cats_sorted":["astro-ph.SR"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-07-17T18:00:02Z","title_canon_sha256":"313b3dea28bd8d28e02b511853b9a8d191442c85f087d1f741ae8e0091702f39"},"schema_version":"1.0","source":{"id":"2607.16397","kind":"arxiv","version":1}},"canonical_sha256":"23e2ed74cff34f503a4d537c53b52fe57d00fa87e39c50b63877deb95f2cd84c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"23e2ed74cff34f503a4d537c53b52fe57d00fa87e39c50b63877deb95f2cd84c","first_computed_at":"2026-07-21T00:20:15.903781Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-21T00:20:15.903781Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8PYDCbVsKc7YuV0xofD+K4BT37kJ6bfVLRwqgL4u7+U5bOh+9nZv3Nd8OsbUWGPrv10l7G2s/3QaK7k+5x9XBg==","signature_status":"signed_v1","signed_at":"2026-07-21T00:20:15.904654Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.16397","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:54cc4c17126c185bac00c7a023393d0684bdfb71fbf7414458fde2d35f3aa051","sha256:eee42a4a669bd6c0000dc42d2c204fdf6fec0ffb2fa9afcd5ad74e6914f2841c"],"state_sha256":"b5df814a50e4f60d194bfbe13dbb6ec68236637f1f89d9f39408492922e43e0d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l44F7BT+S4stOBa/m5GrUh/q0KxiXXTL02SJpThk+6bjogrBgGvfOiej8wDulhgwE4noOXRZNYxc2AZ9XrsGBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T13:48:59.519152Z","bundle_sha256":"e164b575e7b043ffe009f59d4da7e9fa5bff313a671dd90686f13ec950a9e9b7"}}