{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:BLWRDEBKCWYHOC2UBMDKCDIXZX","short_pith_number":"pith:BLWRDEBK","canonical_record":{"source":{"id":"1206.7012","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-06-29T13:09:13Z","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"title_canon_sha256":"5c2973979a057092de23e23e8a276d618d3b8103fb475f89cc06d2e6bd461453","abstract_canon_sha256":"33a8e8bf9f5ee1592d2619eba5f42ce94a28bf5808875bee45fd3ba0bf90a440"},"schema_version":"1.0"},"canonical_sha256":"0aed11902a15b0770b540b06a10d17cdc29ee13c43882e0c118854cdfd8cd46e","source":{"kind":"arxiv","id":"1206.7012","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.7012","created_at":"2026-05-18T01:56:36Z"},{"alias_kind":"arxiv_version","alias_value":"1206.7012v1","created_at":"2026-05-18T01:56:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.7012","created_at":"2026-05-18T01:56:36Z"},{"alias_kind":"pith_short_12","alias_value":"BLWRDEBKCWYH","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"BLWRDEBKCWYHOC2U","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"BLWRDEBK","created_at":"2026-05-18T12:27:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:BLWRDEBKCWYHOC2UBMDKCDIXZX","target":"record","payload":{"canonical_record":{"source":{"id":"1206.7012","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-06-29T13:09:13Z","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"title_canon_sha256":"5c2973979a057092de23e23e8a276d618d3b8103fb475f89cc06d2e6bd461453","abstract_canon_sha256":"33a8e8bf9f5ee1592d2619eba5f42ce94a28bf5808875bee45fd3ba0bf90a440"},"schema_version":"1.0"},"canonical_sha256":"0aed11902a15b0770b540b06a10d17cdc29ee13c43882e0c118854cdfd8cd46e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:56:36.513451Z","signature_b64":"J7yumiMy0SDCtB6dt4M3B8FA89FAytjsRifuM96wpeJ2wo1wFnqmpxBgdyf/9Wb+XEI0BTFNTHOUKeB/f8V4CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0aed11902a15b0770b540b06a10d17cdc29ee13c43882e0c118854cdfd8cd46e","last_reissued_at":"2026-05-18T01:56:36.512822Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:56:36.512822Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1206.7012","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":"2026-05-18T01:56:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"laqnZQi1BhJHGBoOuCN5lJThSKtAe1hEptePbofDcUxdyp7lA30smk7RXV9iG6xdI2eydnF1uzysEmXyWXVoDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T08:47:01.867996Z"},"content_sha256":"f1a20c696a06401a95a4eea538311854dd1d1b0c7ccaac8ebf0ed57ed7d7eeb5","schema_version":"1.0","event_id":"sha256:f1a20c696a06401a95a4eea538311854dd1d1b0c7ccaac8ebf0ed57ed7d7eeb5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:BLWRDEBKCWYHOC2UBMDKCDIXZX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spectroscopic follow-up of UV-excess objects selected from the UVEX survey","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","astro-ph.IM"],"primary_cat":"astro-ph.SR","authors_text":"Ben Spikings, Boris T. Gansicke, Christian Knigge, Danny Steeghs, Eduardo Gonz\\'alez-Solares, Gijs Nelemans, Janet Drew, Jeremy Drake, Jesus M. Corral-Santana, Jorge Casares, Kars Verbeek, Mike Irwin, Niall Deacon, Paul J. Groot, Ralf Napiwotzki, Robert Greimel, Romano Corradi, Roy H. {\\O}stensen, Simone Scaringi, Ulrich Heber","submitted_at":"2012-06-29T13:09:13Z","abstract_excerpt":"We present the results of the first spectroscopic follow-up of 132 optically blue UV-excess sources selected from the UV-excess survey of the Northern Galactic Plane (UVEX). The UV-excess spectra are classified into different populations and grids of model spectra are fit to determine spectral types, temperatures, surface gravities and reddening. From this initial spectroscopic follow-up 95% of the UV-excess candidates turn out to be genuine UV-excess sources such as white dwarfs, white dwarf binaries, subdwarfs type O and B, emission line stars and QSOs. The remaining sources are classified a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.7012","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":"2026-05-18T01:56:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rgfezbHBVw3U68p+vE7vf0upQhXUG+c2Y3g4Ph7agL/+bREZ4IOpFGPkxaB78BMBvL65g6sSX5OQ7riUvE9PCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T08:47:01.868640Z"},"content_sha256":"27d6602e868baf1b52e26f4d75c29218066843fd836ff24f622f7b440cef14fc","schema_version":"1.0","event_id":"sha256:27d6602e868baf1b52e26f4d75c29218066843fd836ff24f622f7b440cef14fc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BLWRDEBKCWYHOC2UBMDKCDIXZX/bundle.json","state_url":"https://pith.science/pith/BLWRDEBKCWYHOC2UBMDKCDIXZX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BLWRDEBKCWYHOC2UBMDKCDIXZX/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":"2026-05-25T08:47:01Z","links":{"resolver":"https://pith.science/pith/BLWRDEBKCWYHOC2UBMDKCDIXZX","bundle":"https://pith.science/pith/BLWRDEBKCWYHOC2UBMDKCDIXZX/bundle.json","state":"https://pith.science/pith/BLWRDEBKCWYHOC2UBMDKCDIXZX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BLWRDEBKCWYHOC2UBMDKCDIXZX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:BLWRDEBKCWYHOC2UBMDKCDIXZX","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":"33a8e8bf9f5ee1592d2619eba5f42ce94a28bf5808875bee45fd3ba0bf90a440","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-06-29T13:09:13Z","title_canon_sha256":"5c2973979a057092de23e23e8a276d618d3b8103fb475f89cc06d2e6bd461453"},"schema_version":"1.0","source":{"id":"1206.7012","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.7012","created_at":"2026-05-18T01:56:36Z"},{"alias_kind":"arxiv_version","alias_value":"1206.7012v1","created_at":"2026-05-18T01:56:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.7012","created_at":"2026-05-18T01:56:36Z"},{"alias_kind":"pith_short_12","alias_value":"BLWRDEBKCWYH","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"BLWRDEBKCWYHOC2U","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"BLWRDEBK","created_at":"2026-05-18T12:27:01Z"}],"graph_snapshots":[{"event_id":"sha256:27d6602e868baf1b52e26f4d75c29218066843fd836ff24f622f7b440cef14fc","target":"graph","created_at":"2026-05-18T01:56:36Z","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 present the results of the first spectroscopic follow-up of 132 optically blue UV-excess sources selected from the UV-excess survey of the Northern Galactic Plane (UVEX). The UV-excess spectra are classified into different populations and grids of model spectra are fit to determine spectral types, temperatures, surface gravities and reddening. From this initial spectroscopic follow-up 95% of the UV-excess candidates turn out to be genuine UV-excess sources such as white dwarfs, white dwarf binaries, subdwarfs type O and B, emission line stars and QSOs. The remaining sources are classified a","authors_text":"Ben Spikings, Boris T. Gansicke, Christian Knigge, Danny Steeghs, Eduardo Gonz\\'alez-Solares, Gijs Nelemans, Janet Drew, Jeremy Drake, Jesus M. Corral-Santana, Jorge Casares, Kars Verbeek, Mike Irwin, Niall Deacon, Paul J. Groot, Ralf Napiwotzki, Robert Greimel, Romano Corradi, Roy H. {\\O}stensen, Simone Scaringi, Ulrich Heber","cross_cats":["astro-ph.GA","astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-06-29T13:09:13Z","title":"Spectroscopic follow-up of UV-excess objects selected from the UVEX survey"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.7012","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:f1a20c696a06401a95a4eea538311854dd1d1b0c7ccaac8ebf0ed57ed7d7eeb5","target":"record","created_at":"2026-05-18T01:56:36Z","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":"33a8e8bf9f5ee1592d2619eba5f42ce94a28bf5808875bee45fd3ba0bf90a440","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-06-29T13:09:13Z","title_canon_sha256":"5c2973979a057092de23e23e8a276d618d3b8103fb475f89cc06d2e6bd461453"},"schema_version":"1.0","source":{"id":"1206.7012","kind":"arxiv","version":1}},"canonical_sha256":"0aed11902a15b0770b540b06a10d17cdc29ee13c43882e0c118854cdfd8cd46e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0aed11902a15b0770b540b06a10d17cdc29ee13c43882e0c118854cdfd8cd46e","first_computed_at":"2026-05-18T01:56:36.512822Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:56:36.512822Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"J7yumiMy0SDCtB6dt4M3B8FA89FAytjsRifuM96wpeJ2wo1wFnqmpxBgdyf/9Wb+XEI0BTFNTHOUKeB/f8V4CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:56:36.513451Z","signed_message":"canonical_sha256_bytes"},"source_id":"1206.7012","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f1a20c696a06401a95a4eea538311854dd1d1b0c7ccaac8ebf0ed57ed7d7eeb5","sha256:27d6602e868baf1b52e26f4d75c29218066843fd836ff24f622f7b440cef14fc"],"state_sha256":"0c4af3c3ce763c5decd64fb2cf8806b308ec95f2c212d7702910670499ab9b01"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z+mGqRDXyfayZSPqsZd5GaOKOc1Cbeqv/H5HujdGYM5tBtj6hGudBtdrSqHy//bgTUXGtKUW5eNJJ+YlIa0CCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T08:47:01.872829Z","bundle_sha256":"83982ae17dc7dbc48a41e1b4f3c603ffeda0ffadf0a6e3c7bee3a18a02ea29fb"}}