{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:NITUKAAYXOQCZJQFFTNRCMHJHC","short_pith_number":"pith:NITUKAAY","canonical_record":{"source":{"id":"1606.03734","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-06-12T15:47:35Z","cross_cats_sorted":[],"title_canon_sha256":"b07e39cc5892ce5dfb6688dedaaf2482a37bdd8c16f309e66a0b75c7e7ca42ce","abstract_canon_sha256":"98868d7cb331d20f1a84c0645054d5865ebc83cb9c8780e95ce0ef6b126abb10"},"schema_version":"1.0"},"canonical_sha256":"6a27450018bba02ca6052cdb1130e9389ebd7ca7c385b517f61054111363daa4","source":{"kind":"arxiv","id":"1606.03734","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.03734","created_at":"2026-05-18T01:10:29Z"},{"alias_kind":"arxiv_version","alias_value":"1606.03734v1","created_at":"2026-05-18T01:10:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.03734","created_at":"2026-05-18T01:10:29Z"},{"alias_kind":"pith_short_12","alias_value":"NITUKAAYXOQC","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_16","alias_value":"NITUKAAYXOQCZJQF","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_8","alias_value":"NITUKAAY","created_at":"2026-05-18T12:30:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:NITUKAAYXOQCZJQFFTNRCMHJHC","target":"record","payload":{"canonical_record":{"source":{"id":"1606.03734","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-06-12T15:47:35Z","cross_cats_sorted":[],"title_canon_sha256":"b07e39cc5892ce5dfb6688dedaaf2482a37bdd8c16f309e66a0b75c7e7ca42ce","abstract_canon_sha256":"98868d7cb331d20f1a84c0645054d5865ebc83cb9c8780e95ce0ef6b126abb10"},"schema_version":"1.0"},"canonical_sha256":"6a27450018bba02ca6052cdb1130e9389ebd7ca7c385b517f61054111363daa4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:10:29.112003Z","signature_b64":"QHtduMqI1BXYUpAEkgciopJ28HhNlPAlGUig8baOO37yH1zMjf5ArIRhqoFFeBXPX5y+m1Td+vz1TtmfnKYWBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6a27450018bba02ca6052cdb1130e9389ebd7ca7c385b517f61054111363daa4","last_reissued_at":"2026-05-18T01:10:29.111502Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:10:29.111502Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1606.03734","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":"2026-05-18T01:10:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OG/cjszrrv/hcfVVdh2BFqElQfHHJQSEJ392uwXoyzrdrwDBNZPSTIhLyJLimTUwaHtadj6v6pkYa8enbzI7Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T10:44:26.154744Z"},"content_sha256":"e7a4cfb0286d319b9bc0e92a232ad92de8c50225933c18a9b2a4ebc9e3d79956","schema_version":"1.0","event_id":"sha256:e7a4cfb0286d319b9bc0e92a232ad92de8c50225933c18a9b2a4ebc9e3d79956"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:NITUKAAYXOQCZJQFFTNRCMHJHC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Radial Velocity Study of the Intermediate Polar EX Hydrae","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Ram\\'irez-Torres, J. Echevarr\\'ia, J. V. Hern\\'andez Santisteban, R. Michel","submitted_at":"2016-06-12T15:47:35Z","abstract_excerpt":"A study on the intermediate polar EX Hya is presented, based on simultaneous photometry and high dispersion spectroscopic observations, during four consecutive nights. The strong photometric modulation related to with the 67-min spin period of the primary star is clearly present, as well as the narrow eclipses associated to the orbital modulation. Since our eclipse timings have been obtained almost 91,000 cycles since the last reported observations, we present new linear ephemeris, although we cannot rule out a sinusoidal variation suggested by previous authors. The system mainly shows double-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.03734","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":"2026-05-18T01:10:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zqd5/f4H+oBrlCSQS501C2xSToWADBAzv3ZwXq8iTPtWLqVX2yvb+RXTaZwFRLI9I9PSNTMs7xjTx+Z1Px5EAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T10:44:26.155101Z"},"content_sha256":"3b9eb68eb2affcff2407f3e97072b065efa0f8ad28f815143be6aa92694ea94e","schema_version":"1.0","event_id":"sha256:3b9eb68eb2affcff2407f3e97072b065efa0f8ad28f815143be6aa92694ea94e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NITUKAAYXOQCZJQFFTNRCMHJHC/bundle.json","state_url":"https://pith.science/pith/NITUKAAYXOQCZJQFFTNRCMHJHC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NITUKAAYXOQCZJQFFTNRCMHJHC/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":"2026-05-30T10:44:26Z","links":{"resolver":"https://pith.science/pith/NITUKAAYXOQCZJQFFTNRCMHJHC","bundle":"https://pith.science/pith/NITUKAAYXOQCZJQFFTNRCMHJHC/bundle.json","state":"https://pith.science/pith/NITUKAAYXOQCZJQFFTNRCMHJHC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NITUKAAYXOQCZJQFFTNRCMHJHC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:NITUKAAYXOQCZJQFFTNRCMHJHC","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":"98868d7cb331d20f1a84c0645054d5865ebc83cb9c8780e95ce0ef6b126abb10","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-06-12T15:47:35Z","title_canon_sha256":"b07e39cc5892ce5dfb6688dedaaf2482a37bdd8c16f309e66a0b75c7e7ca42ce"},"schema_version":"1.0","source":{"id":"1606.03734","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.03734","created_at":"2026-05-18T01:10:29Z"},{"alias_kind":"arxiv_version","alias_value":"1606.03734v1","created_at":"2026-05-18T01:10:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.03734","created_at":"2026-05-18T01:10:29Z"},{"alias_kind":"pith_short_12","alias_value":"NITUKAAYXOQC","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_16","alias_value":"NITUKAAYXOQCZJQF","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_8","alias_value":"NITUKAAY","created_at":"2026-05-18T12:30:32Z"}],"graph_snapshots":[{"event_id":"sha256:3b9eb68eb2affcff2407f3e97072b065efa0f8ad28f815143be6aa92694ea94e","target":"graph","created_at":"2026-05-18T01:10:29Z","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":"A study on the intermediate polar EX Hya is presented, based on simultaneous photometry and high dispersion spectroscopic observations, during four consecutive nights. The strong photometric modulation related to with the 67-min spin period of the primary star is clearly present, as well as the narrow eclipses associated to the orbital modulation. Since our eclipse timings have been obtained almost 91,000 cycles since the last reported observations, we present new linear ephemeris, although we cannot rule out a sinusoidal variation suggested by previous authors. The system mainly shows double-","authors_text":"A. Ram\\'irez-Torres, J. Echevarr\\'ia, J. V. Hern\\'andez Santisteban, R. Michel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-06-12T15:47:35Z","title":"A Radial Velocity Study of the Intermediate Polar EX Hydrae"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.03734","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:e7a4cfb0286d319b9bc0e92a232ad92de8c50225933c18a9b2a4ebc9e3d79956","target":"record","created_at":"2026-05-18T01:10:29Z","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":"98868d7cb331d20f1a84c0645054d5865ebc83cb9c8780e95ce0ef6b126abb10","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-06-12T15:47:35Z","title_canon_sha256":"b07e39cc5892ce5dfb6688dedaaf2482a37bdd8c16f309e66a0b75c7e7ca42ce"},"schema_version":"1.0","source":{"id":"1606.03734","kind":"arxiv","version":1}},"canonical_sha256":"6a27450018bba02ca6052cdb1130e9389ebd7ca7c385b517f61054111363daa4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6a27450018bba02ca6052cdb1130e9389ebd7ca7c385b517f61054111363daa4","first_computed_at":"2026-05-18T01:10:29.111502Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:10:29.111502Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QHtduMqI1BXYUpAEkgciopJ28HhNlPAlGUig8baOO37yH1zMjf5ArIRhqoFFeBXPX5y+m1Td+vz1TtmfnKYWBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:10:29.112003Z","signed_message":"canonical_sha256_bytes"},"source_id":"1606.03734","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e7a4cfb0286d319b9bc0e92a232ad92de8c50225933c18a9b2a4ebc9e3d79956","sha256:3b9eb68eb2affcff2407f3e97072b065efa0f8ad28f815143be6aa92694ea94e"],"state_sha256":"2f66385b33eedc397edd8e98a8b240ced0e024f78329469a32245b3b27269bb0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2zmHKjyGhNzZgHG/gd74Hz8FXug1VzTQCatL9VuaQ4MyFHMK4Ydgze+lbRHjLII4cnjzllaO7yKjjTiDqhjsAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T10:44:26.157539Z","bundle_sha256":"b25617bd0fb0560bf6ad72c8039de332996ef742d77b75ef06789e90df68f515"}}