{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:7KBNDDRYY5CRE5XGGS4JFQRPAQ","short_pith_number":"pith:7KBNDDRY","canonical_record":{"source":{"id":"1508.05291","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-21T14:55:46Z","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"title_canon_sha256":"ffffabc3c5c7208df9872613e9c0cdf17149ab2f8e2c207736e1bae55e9e6946","abstract_canon_sha256":"7b11c73798c00628bde01d1e92c2f615e5f1fffad7bd7a914a73c946a118add3"},"schema_version":"1.0"},"canonical_sha256":"fa82d18e38c7451276e634b892c22f043e9ae2584478a5cbfc2894307f9b30e4","source":{"kind":"arxiv","id":"1508.05291","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.05291","created_at":"2026-05-18T01:34:54Z"},{"alias_kind":"arxiv_version","alias_value":"1508.05291v2","created_at":"2026-05-18T01:34:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.05291","created_at":"2026-05-18T01:34:54Z"},{"alias_kind":"pith_short_12","alias_value":"7KBNDDRYY5CR","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_16","alias_value":"7KBNDDRYY5CRE5XG","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_8","alias_value":"7KBNDDRY","created_at":"2026-05-18T12:29:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:7KBNDDRYY5CRE5XGGS4JFQRPAQ","target":"record","payload":{"canonical_record":{"source":{"id":"1508.05291","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-21T14:55:46Z","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"title_canon_sha256":"ffffabc3c5c7208df9872613e9c0cdf17149ab2f8e2c207736e1bae55e9e6946","abstract_canon_sha256":"7b11c73798c00628bde01d1e92c2f615e5f1fffad7bd7a914a73c946a118add3"},"schema_version":"1.0"},"canonical_sha256":"fa82d18e38c7451276e634b892c22f043e9ae2584478a5cbfc2894307f9b30e4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:34:54.098229Z","signature_b64":"knvXJXyA8eS5svisIfDE6c0VR9IOw9YZ9ZQsLVVaMYWVDP4bhF6XET2f6mbPTr1E05ndqX6ayWAB/8inCYYFBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fa82d18e38c7451276e634b892c22f043e9ae2584478a5cbfc2894307f9b30e4","last_reissued_at":"2026-05-18T01:34:54.097676Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:34:54.097676Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1508.05291","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:34:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"orMuxd8iI/K75KL6lXwekYiBQnAO4JAjwPWc56K/EWuyp3rjzU+Qeu3LvNIqm701F0I42Eo9efZ7yq04cSVjCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T23:42:11.341698Z"},"content_sha256":"9dfbeb4913d57eb2f2d00d50b734d311d72591a93d4f7315e763149e1dffc9eb","schema_version":"1.0","event_id":"sha256:9dfbeb4913d57eb2f2d00d50b734d311d72591a93d4f7315e763149e1dffc9eb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:7KBNDDRYY5CRE5XGGS4JFQRPAQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Discovery of near-ultraviolet counterparts to millisecond pulsars in the globular cluster 47 Tucanae","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"A. M. Cool, A. M. Serenelli, C. O. Heinke, H. N. Cohn, J. Anderson, J. E. Grindlay, L.E. Rivera-Sandoval, L. G. Althaus, M. van den Berg, N. Ivanova, P. D. Edmonds, P. Freire, P. M. Lugger, R. Wijnands","submitted_at":"2015-08-21T14:55:46Z","abstract_excerpt":"We report the discovery of the likely white dwarf companions to radio millisecond pulsars 47 Tuc Q and 47 Tuc S in the globular cluster 47 Tucanae. These blue stars were found in near-ultraviolet images from the Hubble Space Telescope for which we derived accurate absolute astrometry, and are located at positions consistent with the radio coordinates to within 0.016 arcsec (0.2sigma). We present near-ultraviolet and optical colours for the previously identified companion to millisecond pulsar 47 Tuc U, and we unambiguously confirm the tentative prior identifications of the optical counterparts"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.05291","kind":"arxiv","version":2},"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":"2026-05-18T01:34:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YkKXKMftJK3dNNkG/hGEL0Pd+vbewAxBNhXcfcNibW49juADKLbLwK5aTb9fonrhNeM4AausKE1uZWiEot8ICw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T23:42:11.342077Z"},"content_sha256":"04b268eb3682c1ba30de1371b30d3f6bf8db432fe2f35fca6d3051ddf682b025","schema_version":"1.0","event_id":"sha256:04b268eb3682c1ba30de1371b30d3f6bf8db432fe2f35fca6d3051ddf682b025"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7KBNDDRYY5CRE5XGGS4JFQRPAQ/bundle.json","state_url":"https://pith.science/pith/7KBNDDRYY5CRE5XGGS4JFQRPAQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7KBNDDRYY5CRE5XGGS4JFQRPAQ/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":"2026-05-26T23:42:11Z","links":{"resolver":"https://pith.science/pith/7KBNDDRYY5CRE5XGGS4JFQRPAQ","bundle":"https://pith.science/pith/7KBNDDRYY5CRE5XGGS4JFQRPAQ/bundle.json","state":"https://pith.science/pith/7KBNDDRYY5CRE5XGGS4JFQRPAQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7KBNDDRYY5CRE5XGGS4JFQRPAQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:7KBNDDRYY5CRE5XGGS4JFQRPAQ","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":"7b11c73798c00628bde01d1e92c2f615e5f1fffad7bd7a914a73c946a118add3","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-21T14:55:46Z","title_canon_sha256":"ffffabc3c5c7208df9872613e9c0cdf17149ab2f8e2c207736e1bae55e9e6946"},"schema_version":"1.0","source":{"id":"1508.05291","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.05291","created_at":"2026-05-18T01:34:54Z"},{"alias_kind":"arxiv_version","alias_value":"1508.05291v2","created_at":"2026-05-18T01:34:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.05291","created_at":"2026-05-18T01:34:54Z"},{"alias_kind":"pith_short_12","alias_value":"7KBNDDRYY5CR","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_16","alias_value":"7KBNDDRYY5CRE5XG","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_8","alias_value":"7KBNDDRY","created_at":"2026-05-18T12:29:10Z"}],"graph_snapshots":[{"event_id":"sha256:04b268eb3682c1ba30de1371b30d3f6bf8db432fe2f35fca6d3051ddf682b025","target":"graph","created_at":"2026-05-18T01:34:54Z","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 the likely white dwarf companions to radio millisecond pulsars 47 Tuc Q and 47 Tuc S in the globular cluster 47 Tucanae. These blue stars were found in near-ultraviolet images from the Hubble Space Telescope for which we derived accurate absolute astrometry, and are located at positions consistent with the radio coordinates to within 0.016 arcsec (0.2sigma). We present near-ultraviolet and optical colours for the previously identified companion to millisecond pulsar 47 Tuc U, and we unambiguously confirm the tentative prior identifications of the optical counterparts","authors_text":"A. M. Cool, A. M. Serenelli, C. O. Heinke, H. N. Cohn, J. Anderson, J. E. Grindlay, L.E. Rivera-Sandoval, L. G. Althaus, M. van den Berg, N. Ivanova, P. D. Edmonds, P. Freire, P. M. Lugger, R. Wijnands","cross_cats":["astro-ph.GA","astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-21T14:55:46Z","title":"Discovery of near-ultraviolet counterparts to millisecond pulsars in the globular cluster 47 Tucanae"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.05291","kind":"arxiv","version":2},"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":"sha256:9dfbeb4913d57eb2f2d00d50b734d311d72591a93d4f7315e763149e1dffc9eb","target":"record","created_at":"2026-05-18T01:34:54Z","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":"7b11c73798c00628bde01d1e92c2f615e5f1fffad7bd7a914a73c946a118add3","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-21T14:55:46Z","title_canon_sha256":"ffffabc3c5c7208df9872613e9c0cdf17149ab2f8e2c207736e1bae55e9e6946"},"schema_version":"1.0","source":{"id":"1508.05291","kind":"arxiv","version":2}},"canonical_sha256":"fa82d18e38c7451276e634b892c22f043e9ae2584478a5cbfc2894307f9b30e4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fa82d18e38c7451276e634b892c22f043e9ae2584478a5cbfc2894307f9b30e4","first_computed_at":"2026-05-18T01:34:54.097676Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:34:54.097676Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"knvXJXyA8eS5svisIfDE6c0VR9IOw9YZ9ZQsLVVaMYWVDP4bhF6XET2f6mbPTr1E05ndqX6ayWAB/8inCYYFBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:34:54.098229Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.05291","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9dfbeb4913d57eb2f2d00d50b734d311d72591a93d4f7315e763149e1dffc9eb","sha256:04b268eb3682c1ba30de1371b30d3f6bf8db432fe2f35fca6d3051ddf682b025"],"state_sha256":"e681de87ab1b3912c265117bdcd87b41075b3e583b4e82aec9d85133e6b6cb7a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VINkJ7/+uhweKs0Ih8FK+MbLnR3+YgItMLg73FxwkdXoMAO92sqvFBIwy3YLKdu0XtMqca+uud49Yq08sMF1Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T23:42:11.344761Z","bundle_sha256":"5e01205fb4df0290581f2cad6c43ae71260e0cc4bc272594eb562973d20955c0"}}