{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:HZYKMEJ2QHPILDUFTD57D27VXE","short_pith_number":"pith:HZYKMEJ2","canonical_record":{"source":{"id":"1612.02441","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-12-07T21:00:27Z","cross_cats_sorted":[],"title_canon_sha256":"e1e17d6d97efed362670294b1ad80f220ececcc0ccc2ff51b832436debc3e890","abstract_canon_sha256":"7513cdd762d83b94f95b72cbcc2ef4846bfa8a91aa83bbbf7b5dda996e8d8118"},"schema_version":"1.0"},"canonical_sha256":"3e70a6113a81de858e8598fbf1ebf5b910f64188116bc536678bdcfa2e5bf063","source":{"kind":"arxiv","id":"1612.02441","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.02441","created_at":"2026-05-18T00:50:17Z"},{"alias_kind":"arxiv_version","alias_value":"1612.02441v3","created_at":"2026-05-18T00:50:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.02441","created_at":"2026-05-18T00:50:17Z"},{"alias_kind":"pith_short_12","alias_value":"HZYKMEJ2QHPI","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_16","alias_value":"HZYKMEJ2QHPILDUF","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_8","alias_value":"HZYKMEJ2","created_at":"2026-05-18T12:30:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:HZYKMEJ2QHPILDUFTD57D27VXE","target":"record","payload":{"canonical_record":{"source":{"id":"1612.02441","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-12-07T21:00:27Z","cross_cats_sorted":[],"title_canon_sha256":"e1e17d6d97efed362670294b1ad80f220ececcc0ccc2ff51b832436debc3e890","abstract_canon_sha256":"7513cdd762d83b94f95b72cbcc2ef4846bfa8a91aa83bbbf7b5dda996e8d8118"},"schema_version":"1.0"},"canonical_sha256":"3e70a6113a81de858e8598fbf1ebf5b910f64188116bc536678bdcfa2e5bf063","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:50:17.792614Z","signature_b64":"7WH/PwEm8OBkH/yAybrers3YWmSpB74PrsZJwvu8Q/cRvGSIhiW/cZg6ALPqPQhhewYD4hG44cztfbq0FWwJBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3e70a6113a81de858e8598fbf1ebf5b910f64188116bc536678bdcfa2e5bf063","last_reissued_at":"2026-05-18T00:50:17.791978Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:50:17.791978Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1612.02441","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:50:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7R0MQzRssvvIXycpRiioc2UBK4YfiBE17DAreXpeV/OjzrDmeU+H+/N3y1E47czRp2tg6bAKapX2BqIwijmJAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T02:19:45.181754Z"},"content_sha256":"876ae9e13a425283a33f56f0bb7140981fe91faa93228546c0cf2a1bca788daf","schema_version":"1.0","event_id":"sha256:876ae9e13a425283a33f56f0bb7140981fe91faa93228546c0cf2a1bca788daf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:HZYKMEJ2QHPILDUFTD57D27VXE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Absolute dimensions of the eccentric eclipsing binary V541 Cygni","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"2), (2) Univ. of Tennessee, (3) LCOGT, (4) Lehigh Univ., (5) Ohio State Univ., (6) Vanderbilt Univ., 7), (7) Fisk Univ., (8) Univ. of Washington), C.D. McGruder (1, D. James (8) ((1) CfA, D.J. Stevens (5), G. Torres (1), J.E. Rodriguez (1), J. Pepper (4), K.G. Stassun (6, M.B. Lund (6), R.J. Siverd (3)","submitted_at":"2016-12-07T21:00:27Z","abstract_excerpt":"We report new spectroscopic and photometric observations of the main-sequence, detached, eccentric, double-lined eclipsing binary V541 Cyg (P = 15.34 days, e = 0.468). Using these observations together with existing measurements we determine the component masses and radii to better than 1% precision: M1 = 2.335 +0.017/-0.013 MSun, M2 = 2.260 +0.016/-0.013 MSun, R1 = 1.859 +0.012/-0.009 RSun, and R2 = 1.808 +0.015/-0.013 RSun. The nearly identical B9.5 stars have estimated temperatures of 10650 +/- 200 K and 10350 +/- 200 K. A comparison of these properties with current stellar evolution models"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.02441","kind":"arxiv","version":3},"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":"2026-05-18T00:50:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GwDhlgjG6lug0M4x+724jPnefDvNkM2vRofa64rVvssoMBxn5di4i007Qma1ogaSMyItCY+6uky1Kb6tWwDaBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T02:19:45.182139Z"},"content_sha256":"4957617ae2cce374c1562ccbfd1b725d6296da0cd8f7f3a0277bc3cd1ea10c6b","schema_version":"1.0","event_id":"sha256:4957617ae2cce374c1562ccbfd1b725d6296da0cd8f7f3a0277bc3cd1ea10c6b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HZYKMEJ2QHPILDUFTD57D27VXE/bundle.json","state_url":"https://pith.science/pith/HZYKMEJ2QHPILDUFTD57D27VXE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HZYKMEJ2QHPILDUFTD57D27VXE/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":"2026-06-07T02:19:45Z","links":{"resolver":"https://pith.science/pith/HZYKMEJ2QHPILDUFTD57D27VXE","bundle":"https://pith.science/pith/HZYKMEJ2QHPILDUFTD57D27VXE/bundle.json","state":"https://pith.science/pith/HZYKMEJ2QHPILDUFTD57D27VXE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HZYKMEJ2QHPILDUFTD57D27VXE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:HZYKMEJ2QHPILDUFTD57D27VXE","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":"7513cdd762d83b94f95b72cbcc2ef4846bfa8a91aa83bbbf7b5dda996e8d8118","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-12-07T21:00:27Z","title_canon_sha256":"e1e17d6d97efed362670294b1ad80f220ececcc0ccc2ff51b832436debc3e890"},"schema_version":"1.0","source":{"id":"1612.02441","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.02441","created_at":"2026-05-18T00:50:17Z"},{"alias_kind":"arxiv_version","alias_value":"1612.02441v3","created_at":"2026-05-18T00:50:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.02441","created_at":"2026-05-18T00:50:17Z"},{"alias_kind":"pith_short_12","alias_value":"HZYKMEJ2QHPI","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_16","alias_value":"HZYKMEJ2QHPILDUF","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_8","alias_value":"HZYKMEJ2","created_at":"2026-05-18T12:30:22Z"}],"graph_snapshots":[{"event_id":"sha256:4957617ae2cce374c1562ccbfd1b725d6296da0cd8f7f3a0277bc3cd1ea10c6b","target":"graph","created_at":"2026-05-18T00:50:17Z","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 new spectroscopic and photometric observations of the main-sequence, detached, eccentric, double-lined eclipsing binary V541 Cyg (P = 15.34 days, e = 0.468). Using these observations together with existing measurements we determine the component masses and radii to better than 1% precision: M1 = 2.335 +0.017/-0.013 MSun, M2 = 2.260 +0.016/-0.013 MSun, R1 = 1.859 +0.012/-0.009 RSun, and R2 = 1.808 +0.015/-0.013 RSun. The nearly identical B9.5 stars have estimated temperatures of 10650 +/- 200 K and 10350 +/- 200 K. A comparison of these properties with current stellar evolution models","authors_text":"2), (2) Univ. of Tennessee, (3) LCOGT, (4) Lehigh Univ., (5) Ohio State Univ., (6) Vanderbilt Univ., 7), (7) Fisk Univ., (8) Univ. of Washington), C.D. McGruder (1, D. James (8) ((1) CfA, D.J. Stevens (5), G. Torres (1), J.E. Rodriguez (1), J. Pepper (4), K.G. Stassun (6, M.B. Lund (6), R.J. Siverd (3)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-12-07T21:00:27Z","title":"Absolute dimensions of the eccentric eclipsing binary V541 Cygni"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.02441","kind":"arxiv","version":3},"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":"sha256:876ae9e13a425283a33f56f0bb7140981fe91faa93228546c0cf2a1bca788daf","target":"record","created_at":"2026-05-18T00:50:17Z","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":"7513cdd762d83b94f95b72cbcc2ef4846bfa8a91aa83bbbf7b5dda996e8d8118","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-12-07T21:00:27Z","title_canon_sha256":"e1e17d6d97efed362670294b1ad80f220ececcc0ccc2ff51b832436debc3e890"},"schema_version":"1.0","source":{"id":"1612.02441","kind":"arxiv","version":3}},"canonical_sha256":"3e70a6113a81de858e8598fbf1ebf5b910f64188116bc536678bdcfa2e5bf063","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3e70a6113a81de858e8598fbf1ebf5b910f64188116bc536678bdcfa2e5bf063","first_computed_at":"2026-05-18T00:50:17.791978Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:50:17.791978Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7WH/PwEm8OBkH/yAybrers3YWmSpB74PrsZJwvu8Q/cRvGSIhiW/cZg6ALPqPQhhewYD4hG44cztfbq0FWwJBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:50:17.792614Z","signed_message":"canonical_sha256_bytes"},"source_id":"1612.02441","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:876ae9e13a425283a33f56f0bb7140981fe91faa93228546c0cf2a1bca788daf","sha256:4957617ae2cce374c1562ccbfd1b725d6296da0cd8f7f3a0277bc3cd1ea10c6b"],"state_sha256":"6f867b5b399753b1f8aef85e695503af5bcef3eb430e66ae6788b1d0e13c4788"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XIYwioVXabYhmWW4oF+6dU7S4O2GGJvX9xMapvqlR58UevCbtNQiklxO5fHfkjCWajwREN8dzgzz1x0xNKHdDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T02:19:45.184715Z","bundle_sha256":"d443076af17aba541c95fed4c03caf7442369b7d2a424972a57ac4d3cfa56176"}}