{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:6FHVZUHVP3QSMGFHLEB5WLEZTY","short_pith_number":"pith:6FHVZUHV","canonical_record":{"source":{"id":"2105.04894","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-05-11T09:31:43Z","cross_cats_sorted":[],"title_canon_sha256":"8c6833c671b78fef84d62581130e013ab4467cb01805afc75c7a5238e54c2bef","abstract_canon_sha256":"7910da7f526261152a2d342db76209a62ca4d68d08143fa94b8f41afd8d06291"},"schema_version":"1.0"},"canonical_sha256":"f14f5cd0f57ee12618a75903db2c999e3ec75be3fed7b9ea4dcd557b3b86c442","source":{"kind":"arxiv","id":"2105.04894","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.04894","created_at":"2026-07-05T02:53:43Z"},{"alias_kind":"arxiv_version","alias_value":"2105.04894v1","created_at":"2026-07-05T02:53:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.04894","created_at":"2026-07-05T02:53:43Z"},{"alias_kind":"pith_short_12","alias_value":"6FHVZUHVP3QS","created_at":"2026-07-05T02:53:43Z"},{"alias_kind":"pith_short_16","alias_value":"6FHVZUHVP3QSMGFH","created_at":"2026-07-05T02:53:43Z"},{"alias_kind":"pith_short_8","alias_value":"6FHVZUHV","created_at":"2026-07-05T02:53:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:6FHVZUHVP3QSMGFHLEB5WLEZTY","target":"record","payload":{"canonical_record":{"source":{"id":"2105.04894","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-05-11T09:31:43Z","cross_cats_sorted":[],"title_canon_sha256":"8c6833c671b78fef84d62581130e013ab4467cb01805afc75c7a5238e54c2bef","abstract_canon_sha256":"7910da7f526261152a2d342db76209a62ca4d68d08143fa94b8f41afd8d06291"},"schema_version":"1.0"},"canonical_sha256":"f14f5cd0f57ee12618a75903db2c999e3ec75be3fed7b9ea4dcd557b3b86c442","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:53:43.790680Z","signature_b64":"ptUaoAJlVYUa39dG6FTA4l5AvL6lNWOntOpbNLbc54W/8H7528aHyt5mg0WKYSUnuFYRs5x724MKO7hq7QDsDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f14f5cd0f57ee12618a75903db2c999e3ec75be3fed7b9ea4dcd557b3b86c442","last_reissued_at":"2026-07-05T02:53:43.790181Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:53:43.790181Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2105.04894","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":"2026-07-05T02:53:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+VHVrapjgLn7BLIvFOsJOJFax3W2DE0sUSHcKZhUbap6c93Kzvp3cod17D0PxveJRXLdnd2+N2oBvaTDZgCoCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-18T11:45:58.970832Z"},"content_sha256":"f147349e95b99e08c31ed03f16a1586b00a16a994cfc1ff2504a3c706a856ebf","schema_version":"1.0","event_id":"sha256:f147349e95b99e08c31ed03f16a1586b00a16a994cfc1ff2504a3c706a856ebf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:6FHVZUHVP3QSMGFHLEB5WLEZTY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Wide companions to M and L subdwarfs with Gaia and the Virtual Observatory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"E. Solano, J. Gonz\\'alez-Payo, M.-C. G\\'alvez-Ortiz, M. Cort\\'es-Contreras, N. Lodieu, Z. H. Zhang","submitted_at":"2021-05-11T09:31:43Z","abstract_excerpt":"The aim of the project is to identify wide common proper motion companions to a sample of spectroscopically confirmed M and L metal-poor dwarfs (also known as subdwarfs) to investigate the impact of metallicity on the binary fraction of low-mass metal-poor binaries and to improve the determination of their metallicity from the higher-mass binary. We made use of Virtual Observatory tools and large-scale public surveys to look in Gaia for common proper motion companions to a well-defined sample of ultracool subdwarfs with spectral types later than M5 and metallicities below or equal to $-$0.5 de"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.04894","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/2105.04894/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":"2026-07-05T02:53:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vjTThsizkMre8HretYiSZLI1Pvn4KWBLyYqMEfHXAqSZ3Ddn7/YZf0RCeNc7JcVn5n9ZKNAgdQvVNGlfR7xzDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-18T11:45:58.971205Z"},"content_sha256":"0b07cc35f399918df71ebf8bbe54350467b7343d3ecad642642c1a931d915134","schema_version":"1.0","event_id":"sha256:0b07cc35f399918df71ebf8bbe54350467b7343d3ecad642642c1a931d915134"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6FHVZUHVP3QSMGFHLEB5WLEZTY/bundle.json","state_url":"https://pith.science/pith/6FHVZUHVP3QSMGFHLEB5WLEZTY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6FHVZUHVP3QSMGFHLEB5WLEZTY/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":"2026-07-18T11:45:58Z","links":{"resolver":"https://pith.science/pith/6FHVZUHVP3QSMGFHLEB5WLEZTY","bundle":"https://pith.science/pith/6FHVZUHVP3QSMGFHLEB5WLEZTY/bundle.json","state":"https://pith.science/pith/6FHVZUHVP3QSMGFHLEB5WLEZTY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6FHVZUHVP3QSMGFHLEB5WLEZTY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:6FHVZUHVP3QSMGFHLEB5WLEZTY","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":"7910da7f526261152a2d342db76209a62ca4d68d08143fa94b8f41afd8d06291","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-05-11T09:31:43Z","title_canon_sha256":"8c6833c671b78fef84d62581130e013ab4467cb01805afc75c7a5238e54c2bef"},"schema_version":"1.0","source":{"id":"2105.04894","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.04894","created_at":"2026-07-05T02:53:43Z"},{"alias_kind":"arxiv_version","alias_value":"2105.04894v1","created_at":"2026-07-05T02:53:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.04894","created_at":"2026-07-05T02:53:43Z"},{"alias_kind":"pith_short_12","alias_value":"6FHVZUHVP3QS","created_at":"2026-07-05T02:53:43Z"},{"alias_kind":"pith_short_16","alias_value":"6FHVZUHVP3QSMGFH","created_at":"2026-07-05T02:53:43Z"},{"alias_kind":"pith_short_8","alias_value":"6FHVZUHV","created_at":"2026-07-05T02:53:43Z"}],"graph_snapshots":[{"event_id":"sha256:0b07cc35f399918df71ebf8bbe54350467b7343d3ecad642642c1a931d915134","target":"graph","created_at":"2026-07-05T02:53:43Z","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/2105.04894/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The aim of the project is to identify wide common proper motion companions to a sample of spectroscopically confirmed M and L metal-poor dwarfs (also known as subdwarfs) to investigate the impact of metallicity on the binary fraction of low-mass metal-poor binaries and to improve the determination of their metallicity from the higher-mass binary. We made use of Virtual Observatory tools and large-scale public surveys to look in Gaia for common proper motion companions to a well-defined sample of ultracool subdwarfs with spectral types later than M5 and metallicities below or equal to $-$0.5 de","authors_text":"E. Solano, J. Gonz\\'alez-Payo, M.-C. G\\'alvez-Ortiz, M. Cort\\'es-Contreras, N. Lodieu, Z. H. Zhang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-05-11T09:31:43Z","title":"Wide companions to M and L subdwarfs with Gaia and the Virtual Observatory"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.04894","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:f147349e95b99e08c31ed03f16a1586b00a16a994cfc1ff2504a3c706a856ebf","target":"record","created_at":"2026-07-05T02:53:43Z","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":"7910da7f526261152a2d342db76209a62ca4d68d08143fa94b8f41afd8d06291","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-05-11T09:31:43Z","title_canon_sha256":"8c6833c671b78fef84d62581130e013ab4467cb01805afc75c7a5238e54c2bef"},"schema_version":"1.0","source":{"id":"2105.04894","kind":"arxiv","version":1}},"canonical_sha256":"f14f5cd0f57ee12618a75903db2c999e3ec75be3fed7b9ea4dcd557b3b86c442","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f14f5cd0f57ee12618a75903db2c999e3ec75be3fed7b9ea4dcd557b3b86c442","first_computed_at":"2026-07-05T02:53:43.790181Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:53:43.790181Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ptUaoAJlVYUa39dG6FTA4l5AvL6lNWOntOpbNLbc54W/8H7528aHyt5mg0WKYSUnuFYRs5x724MKO7hq7QDsDw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:53:43.790680Z","signed_message":"canonical_sha256_bytes"},"source_id":"2105.04894","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f147349e95b99e08c31ed03f16a1586b00a16a994cfc1ff2504a3c706a856ebf","sha256:0b07cc35f399918df71ebf8bbe54350467b7343d3ecad642642c1a931d915134"],"state_sha256":"2fb86aaa37731c20c27fef1cb36674aa0bb5b9b43040783c554d7ca8e2b560a0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9vlkJdFrKXNMwVruh9VJ1GqnlBoXbN8PkZ0w8iO4+cKbZuJWTBdrRDuQfvtzP0pPbkLpLJbgdke7dbxKEZt4AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-18T11:45:58.973437Z","bundle_sha256":"d5163dc7bc21eea67acfb42c98409f853eef3161b16285283da5506e1a7152a2"}}