{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:QDF7MLWX52CUFDZQU5VTO2FNNT","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":"d8ed6081e5ef2809aac091029d4b6ff0637fa7d50f4f550c73d8687190849469","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-08-12T22:07:18Z","title_canon_sha256":"456261391c234a9b546e8772689d77e89cd2a7c2715e1113969d94ed81e6b7a0"},"schema_version":"1.0","source":{"id":"1508.03084","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.03084","created_at":"2026-05-18T01:30:42Z"},{"alias_kind":"arxiv_version","alias_value":"1508.03084v2","created_at":"2026-05-18T01:30:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.03084","created_at":"2026-05-18T01:30:42Z"},{"alias_kind":"pith_short_12","alias_value":"QDF7MLWX52CU","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"QDF7MLWX52CUFDZQ","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"QDF7MLWX","created_at":"2026-05-18T12:29:37Z"}],"graph_snapshots":[{"event_id":"sha256:541cb52955bf03857f8320cd4d49ab9d7e6e056084485f8547f4aabd95aeba9d","target":"graph","created_at":"2026-05-18T01:30:42Z","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":"Directly detecting thermal emission from young extrasolar planets allows measurement of their atmospheric composition and luminosity, which is influenced by their formation mechanism. Using the Gemini Planet Imager, we discovered a planet orbiting the \\$sim$20 Myr-old star 51 Eridani at a projected separation of 13 astronomical units. Near-infrared observations show a spectrum with strong methane and water vapor absorption. Modeling of the spectra and photometry yields a luminosity of L/LS=1.6-4.0 x 10-6 and an effective temperature of 600-750 K. For this age and luminosity, \"hot-start\" format","authors_text":"A. C. Schneider, A. Rajan, A. R. Rudy, A. S. Burrows, A. Sivaramakrishnan, A. Z. Greenbaum, B. Burningham, B. C. Matthews, B. Gerard, B. Macintosh, B. Zuckerman, C. Chen, C. E. Max, C. Marois, C. V. Morley, D. Fabrycky, D. Lafreniere, D. Long, D. Saumon, D. Savransky, D. W. Palmer, E. Artigau, E. Chiang, E. L. Nielsen, E. L. Rice, F. Marchis, F. T. Rantakyr\\\"o, G. Duch\\^ene, G. Vasisht, I. Song, J. Brewster, J.-B. Ruffio, J. Bulger, J. E. Larkin, J. J. Fortney, J. J. Wang, J. K. Chilcote, J. K. Wallace, J. Lee, J. Maire, J. Patience, J. Rameau, J. R. Graham, K. B. Follette, K. M. Morzinski, K. Ward-Duong, L. A. Poyneer, L. Pueyo, L. Saddlemyer, L.-W. Hung, M. A. Millar-Blanchaer, M. Ammons, M. D. Perrin, M. Johnson-Groh, M. Line, M. P. Fitzgerald, M. Salama, M. S. Marley, M. T. Ruiz, N. Sadakuni, P. Arriaga, P. Hibon, P. Ingraham, P. Kalas, P. Rojo, Q. Konopacky, R. Dong, R. Doyon, R. I. Dawson, R. J. De Rosa, R. Murray-Clay, R. Oppenheimer, R. Patel, R. R. Rafikov, R. Soummer, S. Beckwith, S. Bruzzone, S. Goodsell, S. G. Wolff, S. Hinkley, S. J. Wiktorowicz, S. Metchev, S. Thomas, T. Barman, T. H. Cotten, T. M. Esposito, T. Mittal, Z. H. Draper","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-08-12T22:07:18Z","title":"Discovery and spectroscopy of the young Jovian planet 51 Eri b with the Gemini Planet Imager"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.03084","kind":"arxiv","version":2},"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":"sha256:17fffefd144afe7174c716b152bd15f11378ba18dc97a1335b64bb79ae51828e","target":"record","created_at":"2026-05-18T01:30:42Z","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":"d8ed6081e5ef2809aac091029d4b6ff0637fa7d50f4f550c73d8687190849469","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-08-12T22:07:18Z","title_canon_sha256":"456261391c234a9b546e8772689d77e89cd2a7c2715e1113969d94ed81e6b7a0"},"schema_version":"1.0","source":{"id":"1508.03084","kind":"arxiv","version":2}},"canonical_sha256":"80cbf62ed7ee85428f30a76b3768ad6cfce93e2c6b975f4d2e69b90d8c6fa678","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"80cbf62ed7ee85428f30a76b3768ad6cfce93e2c6b975f4d2e69b90d8c6fa678","first_computed_at":"2026-05-18T01:30:42.598517Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:30:42.598517Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rujBBhIzyy3oZ1t7plK0PuqQVW5zuIJYWQ49dLdlVsRg1NbmF/v7DSgWsy+K7jP0JJdpXm9ZU63YjRQ/Xit8DA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:30:42.599155Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.03084","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:17fffefd144afe7174c716b152bd15f11378ba18dc97a1335b64bb79ae51828e","sha256:541cb52955bf03857f8320cd4d49ab9d7e6e056084485f8547f4aabd95aeba9d"],"state_sha256":"320a6509c0173151979a2452b9d31edab0342a7da59179e8575b8320d5666493"}