{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:EXQPEBUDW6I6YDT4PJAN3SYJ7X","short_pith_number":"pith:EXQPEBUD","canonical_record":{"source":{"id":"1502.02085","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-07T01:13:37Z","cross_cats_sorted":[],"title_canon_sha256":"ad0ee6ac943f21c809ea5369b09bf291e68ca1c1edb628c2b36fdfb6352821ba","abstract_canon_sha256":"32bbb2fd70edf086fbfb2330ba9ce10339a598062a34f7330dcb4c89e552e8f0"},"schema_version":"1.0"},"canonical_sha256":"25e0f20683b791ec0e7c7a40ddcb09fdd78e3aebdb6a253d75e4f13963ca6183","source":{"kind":"arxiv","id":"1502.02085","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.02085","created_at":"2026-05-18T01:41:04Z"},{"alias_kind":"arxiv_version","alias_value":"1502.02085v1","created_at":"2026-05-18T01:41:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.02085","created_at":"2026-05-18T01:41:04Z"},{"alias_kind":"pith_short_12","alias_value":"EXQPEBUDW6I6","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"EXQPEBUDW6I6YDT4","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"EXQPEBUD","created_at":"2026-05-18T12:29:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:EXQPEBUDW6I6YDT4PJAN3SYJ7X","target":"record","payload":{"canonical_record":{"source":{"id":"1502.02085","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-07T01:13:37Z","cross_cats_sorted":[],"title_canon_sha256":"ad0ee6ac943f21c809ea5369b09bf291e68ca1c1edb628c2b36fdfb6352821ba","abstract_canon_sha256":"32bbb2fd70edf086fbfb2330ba9ce10339a598062a34f7330dcb4c89e552e8f0"},"schema_version":"1.0"},"canonical_sha256":"25e0f20683b791ec0e7c7a40ddcb09fdd78e3aebdb6a253d75e4f13963ca6183","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:41:04.313935Z","signature_b64":"o74TIMmvLLQ4FOwGgVTwlzhuZxOekkDQa1dn6IRpCyCOsnJYMDuiEwG56nhtC6XkguAydEX/Us+rTrIbrzxRDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"25e0f20683b791ec0e7c7a40ddcb09fdd78e3aebdb6a253d75e4f13963ca6183","last_reissued_at":"2026-05-18T01:41:04.313444Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:41:04.313444Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1502.02085","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":"2026-05-18T01:41:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rlMvp3t3LgMeo45sfdBa6SLr64ZwG5rg0QhNCkzMQ96Hy6Tqqz306AGveGwWQaYEs/17aQvzJy2uc7qRpd0vCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T17:54:34.712685Z"},"content_sha256":"a03b357e17544f1452f63691971d82ac1144d1af6c1070e275b6c4081a4a267f","schema_version":"1.0","event_id":"sha256:a03b357e17544f1452f63691971d82ac1144d1af6c1070e275b6c4081a4a267f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:EXQPEBUDW6I6YDT4PJAN3SYJ7X","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spectroscopic Orbital Periods for 29 Cataclysmic Variables from the Sloan Digital Sky Survey","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Boris T. Gaensicke, Christopher S. Peters, Cynthia J. Taylor, John R. Thorstensen, John Southworth, Julie N. Skinner","submitted_at":"2015-02-07T01:13:37Z","abstract_excerpt":"We report follow-up spectroscopy of 29 cataclysmic variables from the Sloan Digital Sky Survey (SDSS), 22 of which were discovered by SDSS and seven other previously known systems that were recovered in SDSS. The periods for 16 of these objects were included in the tabulation by Gaensicke et al. (2009). While most of the systems have periods less than 2 hours, only one has a period in the 80-86 minute 'spike' found by Gaensicke et al. (2009), and 11 have periods longer than 3 hours, indicating that the present sample is skewed toward longer-period, higher-luminosity objects. Seven of the objec"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.02085","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":"2026-05-18T01:41:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/Bk11ifi6FQw8DAtH0ODjSkQhOepAKG5neneTr28VoQXqIu/lpP5UPRhbnkEMzr2vXmd4lvAecE1VnldAFfsAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T17:54:34.713017Z"},"content_sha256":"64f53ec0bd765ee501a7067e3d70b462f090dbec259a053fd473976e111d2611","schema_version":"1.0","event_id":"sha256:64f53ec0bd765ee501a7067e3d70b462f090dbec259a053fd473976e111d2611"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EXQPEBUDW6I6YDT4PJAN3SYJ7X/bundle.json","state_url":"https://pith.science/pith/EXQPEBUDW6I6YDT4PJAN3SYJ7X/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EXQPEBUDW6I6YDT4PJAN3SYJ7X/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":"2026-06-28T17:54:34Z","links":{"resolver":"https://pith.science/pith/EXQPEBUDW6I6YDT4PJAN3SYJ7X","bundle":"https://pith.science/pith/EXQPEBUDW6I6YDT4PJAN3SYJ7X/bundle.json","state":"https://pith.science/pith/EXQPEBUDW6I6YDT4PJAN3SYJ7X/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EXQPEBUDW6I6YDT4PJAN3SYJ7X/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:EXQPEBUDW6I6YDT4PJAN3SYJ7X","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":"32bbb2fd70edf086fbfb2330ba9ce10339a598062a34f7330dcb4c89e552e8f0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-07T01:13:37Z","title_canon_sha256":"ad0ee6ac943f21c809ea5369b09bf291e68ca1c1edb628c2b36fdfb6352821ba"},"schema_version":"1.0","source":{"id":"1502.02085","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.02085","created_at":"2026-05-18T01:41:04Z"},{"alias_kind":"arxiv_version","alias_value":"1502.02085v1","created_at":"2026-05-18T01:41:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.02085","created_at":"2026-05-18T01:41:04Z"},{"alias_kind":"pith_short_12","alias_value":"EXQPEBUDW6I6","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"EXQPEBUDW6I6YDT4","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"EXQPEBUD","created_at":"2026-05-18T12:29:19Z"}],"graph_snapshots":[{"event_id":"sha256:64f53ec0bd765ee501a7067e3d70b462f090dbec259a053fd473976e111d2611","target":"graph","created_at":"2026-05-18T01:41:04Z","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 follow-up spectroscopy of 29 cataclysmic variables from the Sloan Digital Sky Survey (SDSS), 22 of which were discovered by SDSS and seven other previously known systems that were recovered in SDSS. The periods for 16 of these objects were included in the tabulation by Gaensicke et al. (2009). While most of the systems have periods less than 2 hours, only one has a period in the 80-86 minute 'spike' found by Gaensicke et al. (2009), and 11 have periods longer than 3 hours, indicating that the present sample is skewed toward longer-period, higher-luminosity objects. Seven of the objec","authors_text":"Boris T. Gaensicke, Christopher S. Peters, Cynthia J. Taylor, John R. Thorstensen, John Southworth, Julie N. Skinner","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-07T01:13:37Z","title":"Spectroscopic Orbital Periods for 29 Cataclysmic Variables from the Sloan Digital Sky Survey"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.02085","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:a03b357e17544f1452f63691971d82ac1144d1af6c1070e275b6c4081a4a267f","target":"record","created_at":"2026-05-18T01:41:04Z","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":"32bbb2fd70edf086fbfb2330ba9ce10339a598062a34f7330dcb4c89e552e8f0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-07T01:13:37Z","title_canon_sha256":"ad0ee6ac943f21c809ea5369b09bf291e68ca1c1edb628c2b36fdfb6352821ba"},"schema_version":"1.0","source":{"id":"1502.02085","kind":"arxiv","version":1}},"canonical_sha256":"25e0f20683b791ec0e7c7a40ddcb09fdd78e3aebdb6a253d75e4f13963ca6183","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"25e0f20683b791ec0e7c7a40ddcb09fdd78e3aebdb6a253d75e4f13963ca6183","first_computed_at":"2026-05-18T01:41:04.313444Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:04.313444Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"o74TIMmvLLQ4FOwGgVTwlzhuZxOekkDQa1dn6IRpCyCOsnJYMDuiEwG56nhtC6XkguAydEX/Us+rTrIbrzxRDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:04.313935Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.02085","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a03b357e17544f1452f63691971d82ac1144d1af6c1070e275b6c4081a4a267f","sha256:64f53ec0bd765ee501a7067e3d70b462f090dbec259a053fd473976e111d2611"],"state_sha256":"574518c7b14eb10da1f79986d3395cc87efad7cbe83d320684d270ee5c48fce0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"I7I3qtka+eRjODLbWuHMYlyMyXvXgX5IKwfUg8joRmEQIb30omRB//3Vw1N6dPwXbPOfoDyiCKEluBKWOE9+CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-28T17:54:34.714875Z","bundle_sha256":"6a4e4263ed663de9ea7905bda03a137cf6c9c1808512f96572e1b0e6295d58d6"}}