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The system lies at a distance of 68 +/- 3 pc, where the angular separation of 16.1 +/- 0.1 arcsec corresponds to a minimum binary separation of 1091 +/- 7 AU. SDSS J1300+5904 is a cool (Teff = 6300 +/- 300K) magnetic white dwarf (B ~ 6 MG). PG 1258+593 is a hydrogen-rich (DA) white dwarf with Teff=14790 +/- 77 K and log(g) = 7.87 +/- 0.02. Using the white dwarf mass-radius relation implies the masses of SDSS J1300+5904 and PG 1258+593 are 0.54 +/- 0.06 Msun and 0.54 "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1001.1359","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-01-08T21:41:50Z","cross_cats_sorted":[],"title_canon_sha256":"2125e2ba50f7d34d3db7323d0ecdb079ce04077bb130d504db7a9fa23d7923f7","abstract_canon_sha256":"b80a78bdefb7e33cd7fad82e129cd73736a35f64fbd287ef41b648882a8ec205"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:10:03.588878Z","signature_b64":"ajHA09S6gefyrKznTQ62OKTmlK+4867NCBNbjciYZZ0LRjCEOaogTxOppzOWZXhebrS6I2FYJINMGtzpG8HEDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9eacd520bd3c8b7c331cd407267f4097e6cb92be6bbbd72d9455d5852d63a5f8","last_reissued_at":"2026-05-18T02:10:03.588421Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:10:03.588421Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"PG 1258+593 and its common proper motion magnetic white dwarf counterpart","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"B. K\\\"ulebi, B. T. G\\\"ansicke, D. Koester, D. Steeghs, J. Girven, S. Jordan, T.R. Marsh","submitted_at":"2010-01-08T21:41:50Z","abstract_excerpt":"We identify SDSS J130033.48+590407.0 as a common proper motion companion to the well-studied DA white dwarf PG 1258+593 (GD322). The system lies at a distance of 68 +/- 3 pc, where the angular separation of 16.1 +/- 0.1 arcsec corresponds to a minimum binary separation of 1091 +/- 7 AU. SDSS J1300+5904 is a cool (Teff = 6300 +/- 300K) magnetic white dwarf (B ~ 6 MG). PG 1258+593 is a hydrogen-rich (DA) white dwarf with Teff=14790 +/- 77 K and log(g) = 7.87 +/- 0.02. 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