{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:7VG3SM7RC5K4QFKL35MO55YRTQ","short_pith_number":"pith:7VG3SM7R","canonical_record":{"source":{"id":"2112.07477","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-12-14T15:39:20Z","cross_cats_sorted":[],"title_canon_sha256":"f8fabda392bbab9fd525cfa1c82e18eef7554c8bcc53ba264f7e89d94abb09ce","abstract_canon_sha256":"461fb6a4e7ae081f8c469c7960f0c721f768723f0665dfa31b3c15464b15d590"},"schema_version":"1.0"},"canonical_sha256":"fd4db933f11755c8154bdf58eef7119c2fb2b99f971beb3115f4907e4c6f6389","source":{"kind":"arxiv","id":"2112.07477","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2112.07477","created_at":"2026-07-05T03:49:27Z"},{"alias_kind":"arxiv_version","alias_value":"2112.07477v1","created_at":"2026-07-05T03:49:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.07477","created_at":"2026-07-05T03:49:27Z"},{"alias_kind":"pith_short_12","alias_value":"7VG3SM7RC5K4","created_at":"2026-07-05T03:49:27Z"},{"alias_kind":"pith_short_16","alias_value":"7VG3SM7RC5K4QFKL","created_at":"2026-07-05T03:49:27Z"},{"alias_kind":"pith_short_8","alias_value":"7VG3SM7R","created_at":"2026-07-05T03:49:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:7VG3SM7RC5K4QFKL35MO55YRTQ","target":"record","payload":{"canonical_record":{"source":{"id":"2112.07477","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-12-14T15:39:20Z","cross_cats_sorted":[],"title_canon_sha256":"f8fabda392bbab9fd525cfa1c82e18eef7554c8bcc53ba264f7e89d94abb09ce","abstract_canon_sha256":"461fb6a4e7ae081f8c469c7960f0c721f768723f0665dfa31b3c15464b15d590"},"schema_version":"1.0"},"canonical_sha256":"fd4db933f11755c8154bdf58eef7119c2fb2b99f971beb3115f4907e4c6f6389","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:49:27.839423Z","signature_b64":"QAHHNT4NBg+tWxDiFESC1UUyARWKhI9ouGhUNSnNHGJ1vWmvso1Fny//1CuBds6vcWqFgp/fAipJGi1XxvPhDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fd4db933f11755c8154bdf58eef7119c2fb2b99f971beb3115f4907e4c6f6389","last_reissued_at":"2026-07-05T03:49:27.838224Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:49:27.838224Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2112.07477","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":"2026-07-05T03:49:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"W+Gz9Nsk7ot0HbVKorA8nHSttb77VXKny2ZBwdLc6aV6bDfiMBvdyxVr+EkpFYHAmZTyrm4U9ZulS709rsXJBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T04:05:32.170106Z"},"content_sha256":"0af7b0dd99144e7020d24028a7cfb82a8c7b763129cd4e779622a7b35f054811","schema_version":"1.0","event_id":"sha256:0af7b0dd99144e7020d24028a7cfb82a8c7b763129cd4e779622a7b35f054811"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:7VG3SM7RC5K4QFKL35MO55YRTQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Deep Images of the Galactic Center with GRAVITY","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Amorim, A. Drescher, A. Jim\\'enez-Rosales, A. Kaufer, A. Young, C. Straubmeier, D. Lutz, E. Gendron, E. Sturm, E. Wieprecht, E. Wiezorrek, F. Eisenhauer, F. Gao, F. Mang, F. Vincent, F. Widmann, G. Bourdarot, G. Hei{\\ss}el, G. Perrin, GRAVITY Collaboration: R. Abuter, G. Zins, H. Bonnet, I. Waisberg, J.-B. Le Bouquin, J. Dexter, J.P. Berger, J. Shangguan, J. Stadler, J. Woillez, K. Perraut, K.R.W. Tristram, L. Jochum, L. Jocou, L.J. Tacconi, M. Baub\\\"ock, M. Habibi, M. Horrobin, M. Nowak, N. Aimar, N.M. F\\\"orster Schreiber, O. Pfuhl, O. Straub, P. Arras, P. Garcia, P. Kervella, P. L\\'ena, P.T. de Zeeuw, R. Davies, R. Genzel, S. Gillessen, S. Hippler, S. Lacour, S. Rabien, S. Scheithauer, S. von Fellenberg, S. Yazici, T. En{\\ss}lin, T. Henning, T. Ott, T. Paumard, T. Shimizu, V. Cardoso, V. Lapeyr\\`ere, W. Brandner, X. Haubois, Y. Cl\\'enet, Y. Dallilar","submitted_at":"2021-12-14T15:39:20Z","abstract_excerpt":"Stellar orbits at the Galactic Center provide a very clean probe of the gravitational potential of the supermassive black hole. They can be studied with unique precision, beyond the confusion limit of a single telescope, with the near-infrared interferometer GRAVITY. Imaging is essential to search the field for faint, unknown stars on short orbits which potentially could constrain the black hole spin. Furthermore, it provides the starting point for astrometric fitting to derive highly accurate stellar positions. Here, we present $\\mathrm{G^R}$, a new imaging tool specifically designed for Gala"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.07477","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2112.07477/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T03:49:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9MloT7fZMbbB2x6vyK4UXF9WNhVbakttaNhDempKU585amdWYJ/HDKH9pgWv4SjqihfSMvtCirorIFHs6EWVDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T04:05:32.170492Z"},"content_sha256":"ea8d91adba2ac4d940317b8469d506a4577ad8f24fb98729da2773fb6d4a9719","schema_version":"1.0","event_id":"sha256:ea8d91adba2ac4d940317b8469d506a4577ad8f24fb98729da2773fb6d4a9719"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7VG3SM7RC5K4QFKL35MO55YRTQ/bundle.json","state_url":"https://pith.science/pith/7VG3SM7RC5K4QFKL35MO55YRTQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7VG3SM7RC5K4QFKL35MO55YRTQ/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":"2026-08-20T04:05:32Z","links":{"resolver":"https://pith.science/pith/7VG3SM7RC5K4QFKL35MO55YRTQ","bundle":"https://pith.science/pith/7VG3SM7RC5K4QFKL35MO55YRTQ/bundle.json","state":"https://pith.science/pith/7VG3SM7RC5K4QFKL35MO55YRTQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7VG3SM7RC5K4QFKL35MO55YRTQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:7VG3SM7RC5K4QFKL35MO55YRTQ","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":"461fb6a4e7ae081f8c469c7960f0c721f768723f0665dfa31b3c15464b15d590","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-12-14T15:39:20Z","title_canon_sha256":"f8fabda392bbab9fd525cfa1c82e18eef7554c8bcc53ba264f7e89d94abb09ce"},"schema_version":"1.0","source":{"id":"2112.07477","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2112.07477","created_at":"2026-07-05T03:49:27Z"},{"alias_kind":"arxiv_version","alias_value":"2112.07477v1","created_at":"2026-07-05T03:49:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.07477","created_at":"2026-07-05T03:49:27Z"},{"alias_kind":"pith_short_12","alias_value":"7VG3SM7RC5K4","created_at":"2026-07-05T03:49:27Z"},{"alias_kind":"pith_short_16","alias_value":"7VG3SM7RC5K4QFKL","created_at":"2026-07-05T03:49:27Z"},{"alias_kind":"pith_short_8","alias_value":"7VG3SM7R","created_at":"2026-07-05T03:49:27Z"}],"graph_snapshots":[{"event_id":"sha256:ea8d91adba2ac4d940317b8469d506a4577ad8f24fb98729da2773fb6d4a9719","target":"graph","created_at":"2026-07-05T03:49:27Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2112.07477/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Stellar orbits at the Galactic Center provide a very clean probe of the gravitational potential of the supermassive black hole. They can be studied with unique precision, beyond the confusion limit of a single telescope, with the near-infrared interferometer GRAVITY. Imaging is essential to search the field for faint, unknown stars on short orbits which potentially could constrain the black hole spin. Furthermore, it provides the starting point for astrometric fitting to derive highly accurate stellar positions. Here, we present $\\mathrm{G^R}$, a new imaging tool specifically designed for Gala","authors_text":"A. Amorim, A. Drescher, A. Jim\\'enez-Rosales, A. Kaufer, A. Young, C. Straubmeier, D. Lutz, E. Gendron, E. Sturm, E. Wieprecht, E. Wiezorrek, F. Eisenhauer, F. Gao, F. Mang, F. Vincent, F. Widmann, G. Bourdarot, G. Hei{\\ss}el, G. Perrin, GRAVITY Collaboration: R. Abuter, G. Zins, H. Bonnet, I. Waisberg, J.-B. Le Bouquin, J. Dexter, J.P. Berger, J. Shangguan, J. Stadler, J. Woillez, K. Perraut, K.R.W. Tristram, L. Jochum, L. Jocou, L.J. Tacconi, M. Baub\\\"ock, M. Habibi, M. Horrobin, M. Nowak, N. Aimar, N.M. F\\\"orster Schreiber, O. Pfuhl, O. Straub, P. Arras, P. Garcia, P. Kervella, P. L\\'ena, P.T. de Zeeuw, R. Davies, R. Genzel, S. Gillessen, S. Hippler, S. Lacour, S. Rabien, S. Scheithauer, S. von Fellenberg, S. Yazici, T. En{\\ss}lin, T. Henning, T. Ott, T. Paumard, T. Shimizu, V. Cardoso, V. Lapeyr\\`ere, W. Brandner, X. Haubois, Y. Cl\\'enet, Y. Dallilar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-12-14T15:39:20Z","title":"Deep Images of the Galactic Center with GRAVITY"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.07477","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":"sha256:0af7b0dd99144e7020d24028a7cfb82a8c7b763129cd4e779622a7b35f054811","target":"record","created_at":"2026-07-05T03:49:27Z","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":"461fb6a4e7ae081f8c469c7960f0c721f768723f0665dfa31b3c15464b15d590","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-12-14T15:39:20Z","title_canon_sha256":"f8fabda392bbab9fd525cfa1c82e18eef7554c8bcc53ba264f7e89d94abb09ce"},"schema_version":"1.0","source":{"id":"2112.07477","kind":"arxiv","version":1}},"canonical_sha256":"fd4db933f11755c8154bdf58eef7119c2fb2b99f971beb3115f4907e4c6f6389","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fd4db933f11755c8154bdf58eef7119c2fb2b99f971beb3115f4907e4c6f6389","first_computed_at":"2026-07-05T03:49:27.838224Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:49:27.838224Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QAHHNT4NBg+tWxDiFESC1UUyARWKhI9ouGhUNSnNHGJ1vWmvso1Fny//1CuBds6vcWqFgp/fAipJGi1XxvPhDw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:49:27.839423Z","signed_message":"canonical_sha256_bytes"},"source_id":"2112.07477","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0af7b0dd99144e7020d24028a7cfb82a8c7b763129cd4e779622a7b35f054811","sha256:ea8d91adba2ac4d940317b8469d506a4577ad8f24fb98729da2773fb6d4a9719"],"state_sha256":"1a4401285327ca36cce3e6f55a228d253dc3fc6a209aa6fb9e9e3f1d8c2fb6a0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"afbcB16dB7xhI/kW9kN67wyzORbLZt38+tsXOTpBdIZCvAvhydoNq5UFMR4hUe89rbaqlCtUG4AH4a46C0gADA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-20T04:05:32.173017Z","bundle_sha256":"8cf453e9a092aed99ae04530ca1a7883bb170f899606c72c263eed8139b9d053"}}