{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:UGCZDYQUQAEUWTOFOMX7O3EK5U","short_pith_number":"pith:UGCZDYQU","canonical_record":{"source":{"id":"1705.02345","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-05-05T18:00:05Z","cross_cats_sorted":[],"title_canon_sha256":"e3f9fab4393abf31df1df60b5f054b25201d8d94e1ca45552198c96f0a318f0a","abstract_canon_sha256":"2c22a9ab1cdfabf9c1b2a029f104574d58e2b96ec20473484eb50a14b9484c9a"},"schema_version":"1.0"},"canonical_sha256":"a18591e21480094b4dc5732ff76c8aed1a4334ff0d516dfb9e7cb421a0e2336a","source":{"kind":"arxiv","id":"1705.02345","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.02345","created_at":"2026-05-18T00:41:59Z"},{"alias_kind":"arxiv_version","alias_value":"1705.02345v1","created_at":"2026-05-18T00:41:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.02345","created_at":"2026-05-18T00:41:59Z"},{"alias_kind":"pith_short_12","alias_value":"UGCZDYQUQAEU","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_16","alias_value":"UGCZDYQUQAEUWTOF","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_8","alias_value":"UGCZDYQU","created_at":"2026-05-18T12:31:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:UGCZDYQUQAEUWTOFOMX7O3EK5U","target":"record","payload":{"canonical_record":{"source":{"id":"1705.02345","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-05-05T18:00:05Z","cross_cats_sorted":[],"title_canon_sha256":"e3f9fab4393abf31df1df60b5f054b25201d8d94e1ca45552198c96f0a318f0a","abstract_canon_sha256":"2c22a9ab1cdfabf9c1b2a029f104574d58e2b96ec20473484eb50a14b9484c9a"},"schema_version":"1.0"},"canonical_sha256":"a18591e21480094b4dc5732ff76c8aed1a4334ff0d516dfb9e7cb421a0e2336a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:41:59.054092Z","signature_b64":"DYuLi29Nx688ps84qvYSsTNTpfWIsz08ivcX+7oKPGpufGYLGxRqqzBHPPNPDtPPWInsXtv/QUvR89MA9iWnBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a18591e21480094b4dc5732ff76c8aed1a4334ff0d516dfb9e7cb421a0e2336a","last_reissued_at":"2026-05-18T00:41:59.053405Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:41:59.053405Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1705.02345","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":"2026-05-18T00:41:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8Rv1QbNNZbDJleiPW769l4yoZVkrn+oZS4KSe8W32cwejNWqpmVwDV93fy+Mo/mxej/jWipJ22VqssEmJ3XYBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T12:47:21.487000Z"},"content_sha256":"c460d50b71672ddc5bbf56315976a5d9bf419f70cd7c7ce1bca6f3e11d6ad469","schema_version":"1.0","event_id":"sha256:c460d50b71672ddc5bbf56315976a5d9bf419f70cd7c7ce1bca6f3e11d6ad469"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:UGCZDYQUQAEUWTOFOMX7O3EK5U","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"First Light for GRAVITY: Phase Referencing Optical Interferometry for the Very Large Telescope Interferometer","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"A. Amorim, A. Buron, A. Eckart, A. Huber, A. Janssen, A. Kaufer, A. M\\'erand, A. Pfl\\\"uger, A. Ram\\'irez, B. Lazareff, B. Wolff, C.A. Hummel, C. Collin, C. Deen, C.E. Garcia Dabo, C. Rau, C. Straubmeier, D. Popovic, D. Ziegler, \\'E. Choquet, E. Gendron, E. M\\\"uller, E. Sturm, E. Wieprecht, E. Wiezorrek, F. Cassaing, F. Chapron, F. Delplancke-Str\\\"obele, F. Derie, F. Eisenhauer, F. Gonte, F. Haussmann, F. M\\\"uller, F. Vincent, G. \\'Avila, G. Duvert, G. Finger, G. Jakob, G. Perrin, GRAVITY Collaboration: R. Abuter, G. Rousset, G. Zins, H. Bonnet, I. Percheron, I. Waisberg, I. Wank, J.-B. Le Bouquin, J. Dexter, J. Kolb, J. Moreno-Ventas, J. Panduro, J.P. Berger, J. Ramos, J. Sanchez-Bermudez, J. Spyromilio, J. Weber, J. Woillez, K. Perraut, K.R.W. Tristram, L. Burtscher, L. Jochum, L. Jocou, L. Kern, L. Mehrgan, L. Pallanca, L. Pasquini, M. Accardo, M. Benisty, M. Ebert, M. Esselborn, M. Grould, M. Haug, M. Horrobin, M. Kiekebusch, M. Kulas, M. Lippa, M. Mellein, M. Riquelme, M. Sch\\\"oller, M. Suarez, M. Wiest, M. Wittkowski, N. Anugu, N. Azouaoui, N. Blind, N. Hubin, N. Schuhler, N. Ventura, O. Hans, O. Pfuhl, P. Bourget, P. F\\'edou, P. Garcia, P. Gordo, P. Haguenauer, P. Kervella, P. L\\`ena, P.M. Plewa, P.T. de Zeeuw, R. Brast, R. Dembet, R. Garcia Lopez, R. Genzel, R. Klein, R. Lenzen, R.-R. Rohloff, S. Gillessen, S. Guieu, S. Hippler, S. Kellner, S. Lacour, S. L\\'ev\\^eque, S. Oberti, S. Rabien, S. Scheithauer, S. Yazici, Th. Henning, T. Moulin, T. Ott, T. Paumard, T. Phan Duc, U. Gr\\\"ozinger, U. Neumann, V. Coud\\'e du Foresto, V. Lapeyr\\`ere, W. Brandner, W. de Wit, X. Haubois, Y. Cl\\'enet, Y. Kok, Y. Magnard, Z. Hubert","submitted_at":"2017-05-05T18:00:05Z","abstract_excerpt":"GRAVITY is a new instrument to coherently combine the light of the European Southern Observatory Very Large Telescope Interferometer to form a telescope with an equivalent 130 m diameter angular resolution and a collecting area of 200 m$^2$. The instrument comprises fiber fed integrated optics beam combination, high resolution spectroscopy, built-in beam analysis and control, near-infrared wavefront sensing, phase-tracking, dual beam operation and laser metrology [...]. This article gives an overview of GRAVITY and reports on the performance and the first astronomical observations during commi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.02345","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":"2026-05-18T00:41:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P9KHXs1yr4jTsOdSc+XDUnnqDjAZ/jvK40YVgGLkLakeNzWUiqkRW5e8npBNRMVQc29om6M2Jz38kxjdDdrLAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T12:47:21.487783Z"},"content_sha256":"a84b4379011f75533fc61025b76d2b2a4f4ca7e4eb6b4229519a1eb4ef8c77d6","schema_version":"1.0","event_id":"sha256:a84b4379011f75533fc61025b76d2b2a4f4ca7e4eb6b4229519a1eb4ef8c77d6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UGCZDYQUQAEUWTOFOMX7O3EK5U/bundle.json","state_url":"https://pith.science/pith/UGCZDYQUQAEUWTOFOMX7O3EK5U/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UGCZDYQUQAEUWTOFOMX7O3EK5U/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":"2026-05-27T12:47:21Z","links":{"resolver":"https://pith.science/pith/UGCZDYQUQAEUWTOFOMX7O3EK5U","bundle":"https://pith.science/pith/UGCZDYQUQAEUWTOFOMX7O3EK5U/bundle.json","state":"https://pith.science/pith/UGCZDYQUQAEUWTOFOMX7O3EK5U/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UGCZDYQUQAEUWTOFOMX7O3EK5U/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:UGCZDYQUQAEUWTOFOMX7O3EK5U","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":"2c22a9ab1cdfabf9c1b2a029f104574d58e2b96ec20473484eb50a14b9484c9a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-05-05T18:00:05Z","title_canon_sha256":"e3f9fab4393abf31df1df60b5f054b25201d8d94e1ca45552198c96f0a318f0a"},"schema_version":"1.0","source":{"id":"1705.02345","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.02345","created_at":"2026-05-18T00:41:59Z"},{"alias_kind":"arxiv_version","alias_value":"1705.02345v1","created_at":"2026-05-18T00:41:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.02345","created_at":"2026-05-18T00:41:59Z"},{"alias_kind":"pith_short_12","alias_value":"UGCZDYQUQAEU","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_16","alias_value":"UGCZDYQUQAEUWTOF","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_8","alias_value":"UGCZDYQU","created_at":"2026-05-18T12:31:46Z"}],"graph_snapshots":[{"event_id":"sha256:a84b4379011f75533fc61025b76d2b2a4f4ca7e4eb6b4229519a1eb4ef8c77d6","target":"graph","created_at":"2026-05-18T00:41:59Z","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":"GRAVITY is a new instrument to coherently combine the light of the European Southern Observatory Very Large Telescope Interferometer to form a telescope with an equivalent 130 m diameter angular resolution and a collecting area of 200 m$^2$. The instrument comprises fiber fed integrated optics beam combination, high resolution spectroscopy, built-in beam analysis and control, near-infrared wavefront sensing, phase-tracking, dual beam operation and laser metrology [...]. This article gives an overview of GRAVITY and reports on the performance and the first astronomical observations during commi","authors_text":"A. Amorim, A. Buron, A. Eckart, A. Huber, A. Janssen, A. Kaufer, A. M\\'erand, A. Pfl\\\"uger, A. Ram\\'irez, B. Lazareff, B. Wolff, C.A. Hummel, C. Collin, C. Deen, C.E. Garcia Dabo, C. Rau, C. Straubmeier, D. Popovic, D. Ziegler, \\'E. Choquet, E. Gendron, E. M\\\"uller, E. Sturm, E. Wieprecht, E. Wiezorrek, F. Cassaing, F. Chapron, F. Delplancke-Str\\\"obele, F. Derie, F. Eisenhauer, F. Gonte, F. Haussmann, F. M\\\"uller, F. Vincent, G. \\'Avila, G. Duvert, G. Finger, G. Jakob, G. Perrin, GRAVITY Collaboration: R. Abuter, G. Rousset, G. Zins, H. Bonnet, I. Percheron, I. Waisberg, I. Wank, J.-B. Le Bouquin, J. Dexter, J. Kolb, J. Moreno-Ventas, J. Panduro, J.P. Berger, J. Ramos, J. Sanchez-Bermudez, J. Spyromilio, J. Weber, J. Woillez, K. Perraut, K.R.W. Tristram, L. Burtscher, L. Jochum, L. Jocou, L. Kern, L. Mehrgan, L. Pallanca, L. Pasquini, M. Accardo, M. Benisty, M. Ebert, M. Esselborn, M. Grould, M. Haug, M. Horrobin, M. Kiekebusch, M. Kulas, M. Lippa, M. Mellein, M. Riquelme, M. Sch\\\"oller, M. Suarez, M. Wiest, M. Wittkowski, N. Anugu, N. Azouaoui, N. Blind, N. Hubin, N. Schuhler, N. Ventura, O. Hans, O. Pfuhl, P. Bourget, P. F\\'edou, P. Garcia, P. Gordo, P. Haguenauer, P. Kervella, P. L\\`ena, P.M. Plewa, P.T. de Zeeuw, R. Brast, R. Dembet, R. Garcia Lopez, R. Genzel, R. Klein, R. Lenzen, R.-R. Rohloff, S. Gillessen, S. Guieu, S. Hippler, S. Kellner, S. Lacour, S. L\\'ev\\^eque, S. Oberti, S. Rabien, S. Scheithauer, S. Yazici, Th. Henning, T. Moulin, T. Ott, T. Paumard, T. Phan Duc, U. Gr\\\"ozinger, U. Neumann, V. Coud\\'e du Foresto, V. Lapeyr\\`ere, W. Brandner, W. de Wit, X. Haubois, Y. Cl\\'enet, Y. Kok, Y. Magnard, Z. Hubert","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-05-05T18:00:05Z","title":"First Light for GRAVITY: Phase Referencing Optical Interferometry for the Very Large Telescope Interferometer"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.02345","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:c460d50b71672ddc5bbf56315976a5d9bf419f70cd7c7ce1bca6f3e11d6ad469","target":"record","created_at":"2026-05-18T00:41:59Z","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":"2c22a9ab1cdfabf9c1b2a029f104574d58e2b96ec20473484eb50a14b9484c9a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-05-05T18:00:05Z","title_canon_sha256":"e3f9fab4393abf31df1df60b5f054b25201d8d94e1ca45552198c96f0a318f0a"},"schema_version":"1.0","source":{"id":"1705.02345","kind":"arxiv","version":1}},"canonical_sha256":"a18591e21480094b4dc5732ff76c8aed1a4334ff0d516dfb9e7cb421a0e2336a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a18591e21480094b4dc5732ff76c8aed1a4334ff0d516dfb9e7cb421a0e2336a","first_computed_at":"2026-05-18T00:41:59.053405Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:41:59.053405Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DYuLi29Nx688ps84qvYSsTNTpfWIsz08ivcX+7oKPGpufGYLGxRqqzBHPPNPDtPPWInsXtv/QUvR89MA9iWnBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:41:59.054092Z","signed_message":"canonical_sha256_bytes"},"source_id":"1705.02345","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c460d50b71672ddc5bbf56315976a5d9bf419f70cd7c7ce1bca6f3e11d6ad469","sha256:a84b4379011f75533fc61025b76d2b2a4f4ca7e4eb6b4229519a1eb4ef8c77d6"],"state_sha256":"622faf79d0a400552cf6a2b72edef8897f6ac42fc5c1a3c2a8a75cabbff03065"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bRmDE12cQc+Cjof/V0qwJjw8m6KHN1w8MnSGO0ztxd2IwL8NNflALCGPnyVNZgxVdZf8GmQHWZVX6LjmaEQ+BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T12:47:21.491710Z","bundle_sha256":"72cd9a629e13c6cb8207fc58afdc3542ae3008d88221e5b03bb94c1014867297"}}